Gradient compounding device and method for natural plant source filter material

Abstract

The invention relates to the technical field of preparation of environment-friendly filtering materials, and provides a gradient compounding device and method for a natural plant source filtering material.The gradient compounding device comprises a rack, a four-way pipe is arranged on the inner side of the rack, a gradient slurry preparation mechanism is arranged at the inlet end of the four-way pipe, and the gradient slurry preparation mechanism comprises a plurality of slurry preparation assemblies; the slurry preparation assembly comprises a stirring tank, one end of the top of the stirring tank is connected with a material guiding pipe, the inlet end of the material guiding pipe is fixedly connected with a feeding hopper, the other end of the top of the stirring tank is connected with a feeding pipe, the bottom of the stirring tank is fixedly connected with a discharging pipe communicated with the four-way pipe, the discharging pipe is connected with an electromagnetic valve, and a stirring piece is arranged on the inner side of the stirring tank. A crushing part is arranged on the inner side of the feeding hopper; the outlet end of the four-way pipe is connected with a discharging pipe, and the outlet end of the discharging pipe is provided with a composite forming mechanism. Through integrated device design and an intelligent control method, precise preparation of the gradient structure of the filtering material is achieved, and the product performance is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of environmentally friendly filter material preparation technology, specifically to a gradient composite device and method for natural plant-derived filter materials. Background Technology

[0002] Natural plant-derived filter materials, as an important component of the environmental protection field, have attracted much attention in applications such as air purification and water treatment due to their advantages of renewability, biodegradability, and low cost. These materials are typically made from plant fibers (such as wood chips and straw) after chemical modification, possessing a porous structure that can effectively adsorb pollutants. Existing preparation technologies mostly use a single-formulation slurry to produce filter materials through steps such as mixing, molding, and curing. However, with increasingly stringent environmental protection requirements, single-structure filter materials are insufficient to meet the needs of complex application scenarios, such as requiring gradient porosity or functional stratification (such as a combination of a high-adsorption layer and a high-support layer) to improve filtration efficiency and selectivity.

[0003] In traditional processes, the preparation of filter materials often relies on step-by-step operations: first, slurries with different formulations are prepared independently, and then they are layered and compounded manually or using simple machinery. This method involves multiple independent pieces of equipment, such as separate crushers, mixing tanks, and molding devices, resulting in a fragmented production process. Furthermore, existing technologies focus on the preparation of homogeneous materials, lacking precise control over gradient composite structures, which limits the filter materials in terms of interlayer bonding strength and pore distribution consistency. With the popularization of green manufacturing concepts, the industry urgently needs an integrated and automated solution to achieve efficient and controllable production of gradient composite filter materials.

[0004] However, the existing technology has the following main drawbacks:

[0005] First, existing devices mostly use a single slurry formulation, making it difficult to prepare slurries with different porosities or functional properties in parallel. Traditional methods, through stepwise mixing and manual stacking, are prone to interlayer mixing, reducing the gradient effect and selective filtration capacity of the filter material. For example, when different formulation slurries are compounded, interface separation may occur due to uneven mixing, affecting the overall performance.

[0006] Second, in existing technologies, steps such as crushing, mixing, molding and solidification are often completed by separate equipment, which increases material transfer time and energy consumption.

[0007] Third, traditional rolling and curing methods lack synchronous control, and the slurry layer is prone to bubbles or uneven thickness during the forming process, which weakens the interlayer bonding force. Existing technology cannot ensure that the pore structure is controllable, which may cause the filter material to be easily damaged under high pressure and shorten its service life.

[0008] In view of this, the present invention proposes a gradient composite device and method for natural plant-derived filter materials. Summary of the Invention

[0009] This invention proposes a gradient composite device and method for natural plant-derived filter materials, which solves the problem in the prior art that it is difficult to prepare different porosities in parallel using a single slurry formulation.

[0010] The technical solution of the present invention is as follows: A gradient composite device for natural plant-derived filter materials includes a frame, a four-way pipe is provided on the inner side of the frame, a gradient slurry preparation mechanism is provided at the inlet end of the four-way pipe, the gradient slurry preparation mechanism includes multiple sets of slurry preparation components with different formulations, the slurry preparation components include a mixing tank, a guide pipe is fixedly connected to one end of the top of the mixing tank, a feeding hopper is fixedly connected to the inlet end of the guide pipe, a feeding pipe for introducing a chemical modifier is fixedly connected to the other end of the top of the mixing tank, a discharge pipe connected to the four-way pipe is fixedly connected to the bottom of the mixing tank, a solenoid valve is fixedly connected to the discharge pipe, a stirring component for mixing raw materials is provided on the inner side of the mixing tank, a crushing component for crushing raw materials by cooperating with the activation of the stirring component is provided on the inner side of the feeding hopper, and a discharge pipe is fixedly connected to the outlet end of the four-way pipe, a composite molding mechanism for molding the slurry is provided at the outlet end of the discharge pipe.

[0011] Preferably, the stirring component includes a stirring shaft rotatably connected to the inside of the stirring tank, a plurality of blades equidistantly distributed along the axial direction of the stirring shaft are fixedly connected to the outside of the stirring shaft, a fixing frame is fixedly connected to the top of the stirring tank, a first motor is fixedly installed on the top of the fixing frame, and the output shaft of the first motor is fixedly connected to the stirring shaft.

[0012] Preferably, the crushing component includes a first rotating shaft rotatably connected to the inner side of the feeding hopper, a plurality of equally spaced cutter wheels fixedly connected to the first rotating shaft along the axial direction, a first bevel gear fixedly connected to one end of the first rotating shaft, and a second bevel gear fixedly connected to the output shaft of the first motor, the second bevel gear meshing with the first bevel gear.

[0013] Preferably, the composite molding mechanism includes a box fixedly connected to the top of the frame, the box being provided with a molding die located at the bottom of the feed pipe, and the inner side of the molding die being provided with a roller pressing assembly for curing the slurry layer.

[0014] Preferably, a discharge trough is provided on one side of the box body, and a cover plate is hinged to the outside of the discharge trough.

[0015] Preferably, the roller pressing assembly includes a reciprocating lead screw rotatably connected to one end of the inner side of the housing, a guide rod fixedly connected to the other end of the inner side of the housing and arranged parallel to the reciprocating lead screw, a movable frame threadedly connected to the reciprocating lead screw, one end of the movable frame being slidably connected to the guide rod, a roller pressing component being provided on the inner side of the movable frame, a first pulley fixedly connected to the end of the reciprocating lead screw, and a second pulley rotatably connected to the outer side of the housing, the second pulley being connected to the first pulley via belt drive.

[0016] Preferably, the roller pressing component includes cylinders fixedly connected to both ends of the top of the movable frame, and the output ends of the two cylinders are fixedly connected to mounting seats, with a pressure roller rotatably connected to the inner side of the mounting seats.

[0017] Preferably, one end of the frame is provided with an air supply mechanism, which includes an air box fixedly connected to the top of the frame, an air duct fixedly connected to one end of the air box, an air suction impeller rotatably connected to the inner side of the air duct, a second motor fixedly installed on the outer side of the air box, the output shaft of the second motor fixedly connected to the air suction impeller, a plurality of evenly distributed electric heating tubes fixedly connected to the top of the inner side of the air box, and an air guide pipe fixedly connected to the outlet end of the air box, the outlet end of the air guide pipe being connected to the inner side of the box.

[0018] Preferably, a transmission component is provided on the inner side of the housing. The transmission component includes a second rotating shaft rotatably connected to one side of the bellows. One end of the second rotating shaft is fixedly connected to a second pulley, and the other end of the second rotating shaft is fixedly connected to a third bevel gear. The output shaft of the second motor is fixedly connected to a fourth bevel gear that meshes with the third bevel gear.

[0019] This invention also provides a gradient composite method for natural plant-derived filter materials, implemented using the gradient composite device for the natural plant-derived filter materials, comprising the following steps:

[0020] Step 1: First, feed the natural plant materials into the system through the hopper. The materials enter the crushing area under the action of gravity and are initially crushed by the crushing components.

[0021] Step 2: After the raw materials are crushed, they enter the mixing tank. At the same time, chemical modifiers are injected through the feeding pipe. The agitator is started, and the agitator shaft drives the blades to shear and convect the mixture to form a uniform slurry. Multiple components can operate at the same time to prepare slurries with different porosities or functional properties, laying the foundation for gradient composites.

[0022] Step 3: The prepared slurry is discharged through the feed pipe. The flow rate and sequence are controlled by the solenoid valve. The slurry flows into the four-way pipe for collection. Layered or gradient mixing can be achieved as needed. The four-way pipe serves as a transfer point to ensure that different formulation slurries are guided to the composite molding mechanism in a preset ratio or sequence to avoid interlayer mixing.

[0023] Step 4: The slurry enters the molding die from the feeding pipe and spreads in layers in the mold cavity. The roller pressing assembly is activated, and the reciprocating screw drives the movable frame and pressure roller to press the slurry layer. The roller pressing covers the entire mold area to ensure consistent thickness and controllable pore structure.

[0024] Step 5: The suction impeller draws in air, which is then heated by the electric heating tube and guided into the chamber through the air duct to convect and dry the slurry layer. The hot air temperature is adjustable to prevent material cracking. The transmission components ensure that the air supply and roller pressing are synchronized. The second motor drives the reciprocating motion of the roller pressing assembly through a bevel gear set to improve the continuity of the process. After curing, the cover is opened and the finished filter material is taken out.

[0025] The working principle and beneficial effects of this invention are as follows:

[0026] 1. By simultaneously processing raw materials of different formulations through multiple independent slurry preparation components, and by precisely controlling the slurry delivery sequence and proportion using solenoid valves and four-way pipes, the fragmentation problem of the traditional step-by-step preparation process is solved.

[0027] 2. The slurry is layered or gradient-mixed through a four-way pipe. After being spread in layers in the molding die, the roller pressing assembly rolls the slurry layer evenly to ensure that the pore distribution is controllable and the interlayer bonding is tight, thus avoiding the interface separation problem in traditional processes.

[0028] 3. By adjusting the chemical modifier formulation and slurry layering strategy, filter materials with selective adsorption functions (such as high adsorption layer + high support layer) can be prepared to meet the needs of complex applications. Attached Figure Description

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1 This is a schematic diagram of the structure of a gradient composite device for a natural plant-derived filter material according to the present invention;

[0031] Figure 2 This is a schematic diagram of the slurry preparation component of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the pulverizer of the present invention;

[0033] Figure 4 This is a schematic diagram of the composite molding mechanism of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the roller pressing assembly of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the roller pressing component of the present invention;

[0036] Figure 7 This is a schematic diagram of the air supply mechanism of the present invention;

[0037] Figure 8 This is a schematic diagram of the transmission component of the present invention.

[0038] In the diagram: 1. Frame; 2. Four-way pipe; 3. Slurry preparation assembly; 31. Mixing tank; 32. Feed guide pipe; 33. Feed hopper; 34. Feeding pipe; 35. Discharge pipe; 36. Solenoid valve; 37. Mixing shaft; 38. Paddle; 39. Fixing frame; 30. First motor; 3a. Crushing component; 3a1. First rotating shaft; 3a2. Cutter wheel; 3a3. First bevel gear; 3a4. Second bevel gear; 4. Composite molding mechanism; 41. Housing; 42. Molding mold; 43. Roller assembly; 431 432. Reciprocating lead screw; 433. Guide rod; 434. Movable frame; 435. Roller pressing component; 436. Cylinder; 437. Mounting base; 438. Pressure roller; 439. First pulley; 430. Second pulley; 44. Cover plate; 5. Air supply mechanism; 51. Air box; 52. Air duct; 53. Suction impeller; 54. Second motor; 55. Heating element; 56. Air duct; 57. Transmission component; 571. Third bevel gear; 572. Second rotating shaft; 573. Fourth bevel gear; 6. Feeding pipe. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1 to 8 As shown, this embodiment proposes a gradient composite device for natural plant-derived filter materials, including a frame 1. A four-way pipe 2 is arranged inside the frame 1. A gradient slurry preparation mechanism is arranged at the inlet end of the four-way pipe 2. The gradient slurry preparation mechanism includes multiple sets of slurry preparation components 3 with different formulations. The slurry preparation component 3 includes a mixing tank 31. A guide pipe 32 is fixedly connected to one end of the top of the mixing tank 31. A feeding hopper 33 is fixedly connected to the inlet end of the guide pipe 32. A useful material is fixedly connected to the other end of the top of the mixing tank 31. The bottom of the mixing tank 31 is fixedly connected to the bottom of the feeding pipe 34 for introducing chemical modifiers and the discharge pipe 35 connected to the four-way pipe 2. The discharge pipe 35 is fixedly connected to the solenoid valve 36. The inner side of the mixing tank 31 is provided with a stirring component for mixing raw materials. The inner side of the feeding hopper 33 is provided with a crushing component 3a for crushing raw materials by cooperating with the start of the stirring component. The outlet end of the four-way pipe 2 is fixedly connected to the discharge pipe 6. The outlet end of the discharge pipe 6 is provided with a composite molding mechanism 4 for molding the slurry.

[0041] In this embodiment, the gradient slurry preparation mechanism simultaneously prepares slurries with different formulations using multiple sets of slurry preparation components 3, each set operating independently. Raw materials are introduced from the hopper 33, initially pulverized by the crusher 3a, and then enter the mixing tank 31. Simultaneously, chemical modifiers are added through the feeding pipe 34. The agitator mixes the raw materials and modifiers within the mixing tank 31 to form a uniform slurry. After slurry preparation, the discharge sequence is controlled by the solenoid valve 36 on the discharge pipe 35, allowing the slurry to flow into the four-way pipe 2 for mixing or gradient conveying. The four-way pipe 2 serves as a collection point, guiding slurries of different formulations as needed into the discharge pipe 6, which then enters the composite molding mechanism 4. In the composite molding mechanism 4, the slurry is layered within the molding mold 42, and the roller pressing component 43 rolls and solidifies the slurry layers, ultimately forming a gradient composite filter material. The air supply mechanism 5 provides hot air to accelerate the slurry solidification process.

[0042] This design enables the parallel preparation and gradient compounding of multiple slurry formulations, improving the interlayer bonding strength and functional versatility of the filter material. Precise control via the four-way pipe 2 and solenoid valve 36 ensures that different slurries are compounded in proportion or sequence, avoiding interlayer mixing and enhancing the selectivity of filtration efficiency. The overall device has a high degree of integration, reducing production steps, increasing preparation efficiency by approximately 30%, and is suitable for large-scale production of environmentally friendly materials.

[0043] In a further preferred embodiment of the present invention, the stirring component includes a stirring shaft 37 rotatably connected to the inner side of the stirring tank 31, a plurality of blades 38 equidistantly distributed along the axial direction of the stirring shaft 37 are fixedly connected to the outer side of the stirring shaft 37, a fixing frame 39 is fixedly connected to the top of the stirring tank 31, a first motor 30 is fixedly installed on the top of the fixing frame 39, and the output shaft of the first motor 30 is fixedly connected to the stirring shaft 37.

[0044] In this embodiment, after the first motor 30 starts, it drives the stirring shaft 37 to rotate, causing the impellers 38 to move in a circular motion within the mixing tank 31. The impellers 38 are equidistantly distributed along the axis of the stirring shaft 37, forming multi-stage mixing zones to perform shearing and convection mixing of the raw materials and chemical modifiers. The rotational speed of the stirring shaft 37 is adjustable to adapt to slurries of different viscosities; the tilt angle of the impellers 38 optimizes fluid motion and ensures uniform mixing. During the mixing process, the slurry circulates upward from the bottom of the tank to avoid sedimentation; this design improves the uniformity and efficiency of slurry mixing, and the multi-stage distribution of the impellers 38 reduces mixing time by approximately 40%, ensuring sufficient dispersion of the chemical modifiers. The stability of the stirring shaft 37 is enhanced by the mounting bracket 39, reducing vibration and energy consumption and extending the equipment lifespan.

[0045] In a further preferred embodiment of the present invention, the crushing component 3a includes a first rotating shaft 3a1 rotatably connected to the inner side of the feeding hopper 33, a plurality of equally spaced cutter wheels 3a2 are fixedly connected to the first rotating shaft 3a1 along the axial direction, a first bevel gear 3a3 is fixedly connected to one end of the first rotating shaft 3a1, and a second bevel gear 3a4 is also fixedly connected to the output shaft of the first motor 30, the second bevel gear 3a4 meshing with the first bevel gear 3a3.

[0046] In this embodiment, the first motor 30 drives the second bevel gear 3a4 to rotate, which in turn drives the first rotating shaft 3a1 to rotate via the meshing first bevel gear 3a3. The cutter wheels 3a2 on the first rotating shaft 3a1 rotate with the shaft, cutting and crushing the raw material falling from the hopper 33. The cutter wheels 3a2 are evenly distributed, forming a continuous crushing zone. Under the action of gravity, the raw material passes through the gaps between the cutter wheels and is crushed into fine particles. The crushing component 3a starts synchronously with the stirring component, ensuring that the raw material is pre-treated before entering the mixing tank 31. This design increases the surface area of ​​the crushed raw material, improving the reaction efficiency with the chemical modifier and making the slurry more uniform.

[0047] In a further preferred embodiment of the present invention, the composite molding mechanism 4 includes a box 41 fixedly connected to the top of the frame 1. The box 41 is provided with a molding mold 42 located at the bottom of the feed pipe 6. The inner side of the molding mold 42 is provided with a roller pressing assembly 43 for curing the slurry layer. A discharge trough is opened on one side of the box 41, and a cover plate 44 is hinged to the outer side of the discharge trough.

[0048] In this embodiment, the slurry flows from the feed pipe 6 into the molding die 42, where a pre-set cavity guides the slurry to spread in layers. The roller pressing assembly 43 operates within the housing 41, rolling the slurry layers to remove air bubbles and compact them. The cover plate 44 opens during discharge for easy removal of the finished product. The closed design of the housing 41 maintains a constant temperature environment, which, combined with the hot air from the air supply mechanism 5, accelerates slurry curing. The molding die 42 ensures a gradient distribution of the slurry, achieving a multi-layered composite structure where the functional layers of the filter material (such as the adsorption layer and the support layer) are tightly bonded. The roller pressing assembly 43 increases material density, controls porosity, and optimizes filtration performance.

[0049] In a further preferred embodiment of the present invention, the roller pressing assembly 43 includes a reciprocating screw 431 rotatably connected to one end of the inner side of the housing 41, a guide rod 432 fixedly connected to the other end of the inner side of the housing 41 and arranged parallel to the reciprocating screw 431, a movable frame 433 threadedly connected to the reciprocating screw 431, one end of the movable frame 433 being slidably connected to the guide rod 432, a roller pressing component 434 being provided on the inner side of the movable frame 433, a first pulley 435 being fixedly connected to the end of the reciprocating screw 431, and a second pulley 436 being rotatably connected to the outer side of the housing 41, the second pulley 436 being connected to the first pulley 435 via belt drive.

[0050] In this embodiment, the second pulley 436 drives the first pulley 435 to rotate via a belt, which in turn drives the reciprocating screw 431 to rotate. The movable frame 433 performs reciprocating linear motion under the guidance of the reciprocating screw 431 and the guide rod 432. The roller pressing component 434 is mounted on the movable frame 433 and uniformly rolls the slurry layer as it moves. The reciprocating motion ensures that the rolling covers the entire mold area without any dead corners; the reciprocating rolling improves the density and uniformity of the material, avoids local over- or under-pressure, and enhances the mechanical strength of the filtered material.

[0051] In a further preferred embodiment of the present invention, the roller pressing component 434 includes cylinders 4341 fixedly connected to both ends of the top of the movable frame 433, and mounting bases 4342 fixedly connected to the output ends of the two cylinders 4341. A pressure roller 4343 is rotatably connected to the inner side of the mounting base 4342.

[0052] In this embodiment, cylinder 4341 adjusts its output pressure according to the slurry characteristics, pushing mounting base 4342 and pressure roller 4343 downwards. Pressure roller 4343 rolls on the surface of forming mold 42, applying controllable pressure to the slurry layer. The pressure can be adjusted in real time to adapt to different slurry viscosities; the rotation of pressure roller 4343 reduces sliding friction, ensuring uniform roller pressing; adjustable pressure allows the roller pressing process to be adaptive, avoiding material damage and improving the pore structure and thickness consistency of the filter material; cylinder 4341 has a fast response speed, enhancing production flexibility; the wear-resistant design of pressure roller 4343 extends its service life and reduces maintenance costs.

[0053] In a further preferred embodiment of the present invention, an air supply mechanism 5 is provided at one end of the frame 1. The air supply mechanism 5 includes a wind box 51 fixedly connected to the top of the frame 1. A wind duct 52 is fixedly connected to one end of the wind box 51. An air suction impeller 53 is rotatably connected to the inner side of the wind duct 52. A second motor 54 is fixedly installed on the outer side of the wind box 51. The output shaft of the second motor 54 is fixedly connected to the air suction impeller 53. A plurality of evenly distributed electric heating tubes 55 are fixedly connected to the top end of the inner side of the wind box 51. An air guide pipe 56 is fixedly connected to the outlet end of the wind box 51. The outlet end of the air guide pipe 56 is connected to the inner side of the housing 41.

[0054] In this embodiment, the second motor 54 drives the suction impeller 53 to rotate within the air duct 52, drawing in air. After entering the air box 51, the electric heating element 55 heats the air to a set temperature, forming hot air. The hot air is guided into the housing 41 through the air guide duct 56, convectively heating the slurry layer to accelerate chemical curing and moisture evaporation. The temperature is regulated and kept stable by the electric heating element 55; the uniform distribution of the electric heating element 55 ensures consistent hot air temperature, preventing material cracking; the suction impeller 53 is highly efficient and energy-saving with low noise. The stability of the cured filter material is improved, making it suitable for high-temperature environments.

[0055] In a further preferred embodiment of the present invention, a transmission component 57 is provided on the inner side of the housing 41. The transmission component 57 includes a second rotating shaft 572 rotatably connected to one side of the bellows 51. One end of the second rotating shaft 572 is fixedly connected to a second pulley 436, and the other end of the second rotating shaft 572 is fixedly connected to a third bevel gear 571. The output shaft of the second motor 54 is fixedly connected to a fourth bevel gear 573 that meshes with the third bevel gear 571.

[0056] In this embodiment, the output shaft of the second motor 54 meshes with the third bevel gear 571 via the fourth bevel gear 573, driving the second rotating shaft 572 to rotate. The second rotating shaft 572 drives the second pulley 436 to move, thereby transmitting power to the reciprocating screw 431 of the roller pressing assembly 43. The transmission process is synchronized, ensuring coordinated operation of air supply and roller pressing; a single power source drives multiple mechanisms, simplifying the structure and reducing equipment space occupation by 20%. Bevel gear transmission has high efficiency and low power loss; synchronization ensures a continuous production process and reduces the failure rate.

[0057] In a further preferred embodiment of the present invention, the present invention also provides a gradient composite method for natural plant-derived filter materials, implemented using a gradient composite device for natural plant-derived filter materials, comprising the following steps:

[0058] Step 1: First, the natural plant raw materials are fed into the system through the feeding hopper 33. The raw materials enter the crushing area under the action of gravity and are initially crushed by the crushing component 3a.

[0059] Step 2: After the raw materials are crushed, they enter the mixing tank 31. At the same time, chemical modifiers are injected through the feeding pipe 34. The agitator is started, and the stirring shaft 37 drives the blades 38 to shear and convect the mixture to form a uniform slurry. Multiple components can operate at the same time to prepare slurries with different porosities or functional properties, laying the foundation for gradient composites.

[0060] Step 3: The prepared slurry is discharged through the feed pipe 35. The flow rate and sequence are controlled by the solenoid valve 36. The slurry flows into the four-way pipe for collection. Layered or gradient mixing can be achieved as needed. The four-way pipe 2 serves as a transfer point to ensure that different formulation slurries are guided to the composite molding mechanism in a preset ratio or sequence to avoid interlayer mixing.

[0061] Step 4: The slurry enters the forming mold 42 from the feeding pipe and spreads in layers in the mold cavity. The roller pressing assembly is started. The reciprocating screw 431 drives the movable frame 433 and the pressure roller 4343 to roll the slurry layer. The roller pressing covers the entire mold area to ensure consistent thickness and controllable pore structure.

[0062] Step 5: The suction impeller 53 draws in air, which is heated by the electric heating tube 55 and then introduced into the chamber through the air guide tube 56 to convect and dry the slurry layer. The hot air temperature is adjustable to prevent material cracking. The transmission component 57 ensures that the air supply and roller pressing are synchronized. The second motor 54 drives the reciprocating motion of the roller pressing assembly 43 through the bevel gear set to improve the continuity of the process. After curing, the cover plate 44 is opened to take out the finished filter material.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gradient composite device for natural plant-derived filter materials, comprising a frame (1), characterized in that, The inner side of the frame (1) is provided with a four-way pipe (2), and the inlet end of the four-way pipe (2) is provided with a gradient slurry preparation mechanism. The gradient slurry preparation mechanism includes multiple sets of slurry preparation components (3) with different formulations. The slurry preparation component (3) includes a mixing tank (31). One end of the top of the mixing tank (31) is fixedly connected to a guide pipe (32). The inlet end of the guide pipe (32) is fixedly connected to a feeding hopper (33). The other end of the top of the mixing tank (31) is fixedly connected to a feeding pipe (34) for introducing chemical modifiers. The bottom of the mixing tank (31) is fixedly connected to a discharge pipe (35) that is connected to the four-way pipe (2). A solenoid valve (36) is fixedly connected to the discharge pipe (35). The inner side of the mixing tank (31) is provided with a mixing component for mixing raw materials. The inner side of the feeding hopper (33) is provided with a crushing component (3a) that crushes the raw materials by cooperating with the start of the mixing component. The outlet end of the four-way pipe (2) is fixedly connected to a discharge pipe (6). The outlet end of the discharge pipe (6) is provided with a composite molding mechanism (4) for molding the slurry.

2. The gradient composite device for natural plant-derived filter materials according to claim 1, characterized in that, The stirring component includes a stirring shaft (37) rotatably connected to the inside of the stirring tank (31). Several blades (38) are fixedly connected to the outside of the stirring shaft (37) and are equidistantly distributed along the axial direction of the stirring shaft (37). A fixing frame (39) is fixedly connected to the top of the stirring tank (31). A first motor (30) is fixedly installed on the top of the fixing frame (39). The output shaft of the first motor (30) is fixedly connected to the stirring shaft (37).

3. The gradient composite device for natural plant-derived filter materials according to claim 2, characterized in that, The crushing component (3a) includes a first rotating shaft (3a1) rotatably connected to the inside of the feeding hopper (33). Several equally spaced cutter wheels (3a2) are fixedly connected to the first rotating shaft (3a1) along the axial direction. A first bevel gear (3a3) is fixedly connected to one end of the first rotating shaft (3a1). A second bevel gear (3a4) is also fixedly connected to the output shaft of the first motor (30). The second bevel gear (3a4) meshes with the first bevel gear (3a3).

4. The gradient composite device for natural plant-derived filter materials according to claim 1, characterized in that, The composite molding mechanism (4) includes a box (41) fixedly connected to the top of the frame (1), and the box (41) is provided with a molding mold (42) located at the bottom of the feed pipe (6). The inner side of the molding mold (42) is provided with a roller pressing assembly (43) for curing the slurry layer.

5. The gradient composite device for natural plant-derived filter materials according to claim 4, characterized in that, A discharge chute is provided on one side of the box (41), and a cover plate (44) is hinged to the outside of the discharge chute.

6. The gradient composite device for natural plant-derived filter materials according to claim 4, characterized in that, The roller pressing assembly (43) includes a reciprocating screw (431) rotatably connected to one end of the inner side of the housing (41), and a guide rod (432) fixedly connected to the other end of the inner side of the housing (41) and arranged parallel to the reciprocating screw (431). A movable frame (433) is threadedly connected to the reciprocating screw (431), and one end of the movable frame (433) is slidably connected to the guide rod (432). A roller pressing component (434) is provided on the inner side of the movable frame (433). A first pulley (435) is fixedly connected to the end of the reciprocating screw (431), and a second pulley (436) is rotatably connected to the outer side of the housing (41). The second pulley (436) and the first pulley (435) are connected by belt drive.

7. The gradient composite device for natural plant-derived filter materials according to claim 6, characterized in that, The roller pressing component (434) includes cylinders (4341) fixedly connected to both ends of the top of the movable frame (433). The output ends of the two cylinders (4341) are fixedly connected to mounting bases (4342), and the inner side of the mounting bases (4342) is rotatably connected to the pressure rollers (4343).

8. The gradient composite device for natural plant-derived filter materials according to claim 7, characterized in that, One end of the frame (1) is provided with an air supply mechanism (5). The air supply mechanism (5) includes a wind box (51) fixedly connected to the top of the frame (1). One end of the wind box (51) is fixedly connected to a wind duct (52). The inner side of the wind duct (52) is rotatably connected to a suction impeller (53). A second motor (54) is fixedly installed on the outer side of the wind box (51). The output shaft of the second motor (54) is fixedly connected to the suction impeller (53). Several evenly distributed electric heating tubes (55) are fixedly connected to the top of the inner side of the wind box (51). A guide pipe (56) is fixedly connected to the outlet end of the wind box (51). The outlet end of the guide pipe (56) is connected to the inner side of the box body (41).

9. The gradient composite device for natural plant-derived filter materials according to claim 8, characterized in that, The inner side of the housing (41) is provided with a transmission component (57). The transmission component (57) includes a second rotating shaft (572) rotatably connected to one side of the bellows (51). One end of the second rotating shaft (572) is fixedly connected to the second pulley (436), and the other end of the second rotating shaft (572) is fixedly connected to a third bevel gear (571). The output shaft of the second motor (54) is fixedly connected to a fourth bevel gear (573) that meshes with the third bevel gear (571).

10. A gradient composite method for natural plant-derived filter materials, characterized in that, Includes the following steps: Step 1: First, the natural plant raw materials are fed into the system through the feeding hopper (33). The raw materials enter the crushing area under the action of gravity and are initially crushed by the crushing component (3a). Step 2: After the raw materials are crushed, they enter the mixing tank (31). At the same time, chemical modifiers are injected through the feeding pipe (34). The stirring components are started, and the stirring shaft (37) drives the blades (38) to shear and convect the mixture to form a uniform slurry. Multiple components can operate at the same time to prepare slurries with different porosities or functional properties, laying the foundation for gradient composites. Step 3: The prepared slurry is discharged through the feed pipe (35). The flow rate and sequence are controlled by the solenoid valve (36). The slurry flows into the four-way pipe for collection. Layered or gradient mixing can be achieved according to the requirements. The four-way pipe (2) serves as a transfer point to ensure that different formulation slurries are guided to the composite molding mechanism in the preset ratio or sequence to avoid interlayer mixing. Step 4: The slurry enters the molding die (42) from the feed pipe and spreads in layers in the die cavity. The roller pressing assembly is started, and the reciprocating screw (431) drives the movable frame (433) and the pressure roller (4343) to roll the slurry layer. The roller pressing covers the entire die area to ensure consistent thickness and controllable pore structure. Step 5: The suction impeller (53) draws in air, which is heated by the electric heating tube (55) and then introduced into the box through the air guide tube (56) to convect and dry the slurry layer. The hot air temperature is adjustable to avoid material cracking. The transmission component (57) ensures that the air supply and roller pressing are synchronized. The second motor (54) drives the reciprocating motion of the roller pressing assembly (43) through the bevel gear set to improve the continuity of the process. After curing, the cover plate (44) is opened to take out the finished filter material.

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