A diatom device based on physical interception

Abstract

The utility model discloses a diatom device based on physical interception relates to water body management technical field, including aeration tank, be equipped with aeration assembly and filter component in the aeration tank, the aeration assembly is used for pumping gas to the aeration tank, the filter component includes the lower pressing plate and drive part, the drive part is used for driving lower pressing plate rotation, the recess is opened to the upper top wall of lower pressing plate, the bottom wall of recess is opened to a plurality of water guide groove, and the upper pressing plate is equipped with above lower pressing plate, and the bottom wall of upper pressing plate constitutes adsorption cavity with recess, the axis of output and input of adsorption cavity all along tangent direction of recess arrangement, the water guide groove is used for making the water flow that enters adsorption cavity produces vortex, be equipped with a plurality of adsorption granule for clean water in adsorption cavity, the bottom wall of upper pressing plate can with recess bottom wall conformal contact is used for reducing filter material replacement difficulty and promoting filter material adsorption effect.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a diatom device based on physical interception. Background Technology

[0002] With the increasing prominence of eutrophication in water bodies, algal blooms such as diatoms and particulate matter pollution have become global environmental problems. Physical interception and adsorption technologies, as important means of water treatment, are widely used in practical engineering projects due to their ease of operation and rapid effectiveness.

[0003] Excessive proliferation of diatoms and accumulation of suspended particulate matter in water bodies are significant factors leading to water quality deterioration. Diatoms, common phytoplankton, have siliceous cell walls that easily form algal blooms under suitable conditions, disrupting the aquatic ecological balance and potentially releasing algal toxins. Suspended particulate matter, acting as a carrier of pollutants (such as heavy metals and organic matter), exacerbates water turbidity, affecting light transmittance and the living environment of organisms. Physical interception technologies primarily use mechanical filtration and sieve separation to directly trap algae and large particles; adsorption technologies rely on the high specific surface area and surface activity of porous materials to enrich fine particulate matter and dissolved pollutants through physical or chemical processes. These two types of technologies play an important role in drinking water source, landscape water body, and industrial wastewater treatment due to their advantages of not requiring the addition of chemical agents and having a low risk of secondary pollution.

[0004] Despite the advantages of physical interception and adsorption technologies, their application still faces multiple challenges. Physical interception technologies are prone to increased energy consumption and maintenance costs due to filter pore clogging. Furthermore, extracellular polymeric substances (EPS) secreted by diatom cells may adhere to the filter media surface, causing biofouling and significantly reducing interception efficiency. Moreover, the implementation of these technologies often relies on equipment such as aeration tanks; once the filter media is placed inside these tanks, it is often difficult to separate from the water, making replacement and maintenance challenging and resulting in significant manpower and material costs. Utility Model Content

[0005] The purpose of this invention is to provide a diatomaceous earth device based on physical interception to solve the above-mentioned problems.

[0006] This utility model is achieved through the following technical solution: A diatomaceous earth device based on physical interception includes an aeration tank containing an aeration component and a filtration component. The aeration component pumps gas into the aeration tank. The filtration component includes a lower pressure plate and a driving component. The driving component drives the lower pressure plate to rotate. The upper top wall of the lower pressure plate has a groove, and the bottom wall of the groove has several water guide channels. An upper pressure plate is located above the lower pressure plate, and the bottom wall of the upper pressure plate and the groove form an adsorption chamber. The axes of the output and input ends of the adsorption chamber are arranged along the tangent direction of the groove. The water guide channels generate eddies in the water flowing into the adsorption chamber. The adsorption chamber contains several adsorption particles for water purification. The design of the upper and lower pressure plates in this scheme forms an adsorption chamber in the aeration tank. The water guide channel allows water to enter the adsorption chamber and generate eddies, thereby increasing the effective contact area between the water and the adsorbed particles and improving the adsorption effect. Furthermore, the water guide channel increases the flow path of the water, making it easier for flocculent materials such as diatoms in the water to remain in the adsorption chamber.

[0007] Furthermore, the bottom wall of the groove is arranged in a conical, inclined manner. In this design, the inclined arrangement causes the water flow to change its direction and speed again as it impacts the bottom wall of the groove, thereby further forming eddies and increasing the effective contact area between the water flow and the adsorbed particles.

[0008] Furthermore, the maximum distance between the sidewall of the upper pressure plate and the sidewall of the groove is less than the diameter of the adsorbed particles. This design of the distance between the groove and the upper pressure plate reduces the probability of adsorbed particles escaping from the adsorption chamber through the gap between them during device operation, thereby minimizing particle loss.

[0009] Furthermore, the adsorbent particles are made of bio-diatomaceous earth. The bio-diatomaceous earth used in this solution can increase the speed and probability of biofilm formation on the surface of the adsorbent particles, thereby enhancing the water purification capacity of the device through biofilm.

[0010] Furthermore, the aeration component includes an aerator, the output of which is connected to the water distribution channel of the aeration tank via a pipeline. The aerator is designed to pump air into the aeration tank, providing oxygen to the microorganisms within, promoting their growth, and thus further enhancing the microorganisms' ability to purify the water.

[0011] Furthermore, the lower pressure plate is made of a porous material. This porous material design effectively increases the probability of gas entering the adsorption chamber compared to existing technologies.

[0012] Furthermore, a baffle is slidably fitted onto the upper pressure plate. The sum of the areas of the bottom wall of the baffle and the bottom wall of the upper pressure plate is the same as the sum of the areas of the bottom wall of the groove and the bottom wall of the water guide channel. A linear actuator is also provided on the upper pressure plate, used to adjust the distance between the bottom wall of the upper pressure plate and the bottom wall of the baffle. In this design, the baffle protects the upper pressure plate when the operator increases the drilling speed of the drive component, reducing potential damage to the upper pressure plate caused by excessive drilling speed of the lower pressure plate.

[0013] Furthermore, a check valve assembly is provided at the output end of the adsorption chamber to restrict the flow direction of the fluid at the output end of the adsorption chamber. This design effectively prevents water from the next treatment device from flowing back into the adsorption chamber, thus avoiding contamination of the adsorbed particles inside the device.

[0014] Furthermore, the check valve assembly includes an elastic ring, one end of which is fixedly connected to the output end of the adsorption chamber. Several arc-shaped plates are embedded within the elastic ring. When no fluid flows through the output end of the adsorption chamber, the projected area of ​​the elastic ring is the same as the projected area of ​​the output end of the adsorption chamber, and the arc-shaped plates are inclined relative to the flow cross-section of the adsorption chamber output end. In this design, the arc-shaped plates can scrape the adsorbed particles as they pass through the output end, reducing the likelihood of flocculent matter on the surface of the adsorbed particles entering the next processing device, thus increasing the cleaning difficulty of the next processing device.

[0015] Furthermore, when the force applied to the elastic ring reaches the elastic limit of the elastic ring, the diameter of the circle formed by the end of the arc-shaped plate away from the adsorption cavity is smaller than the diameter of the adsorbed particles. This solution ensures the cleaning effect of the arc-shaped plate on the surface of the adsorbed particles by limiting the size of the arc-shaped plate.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects: This invention utilizes an upper and lower pressure plate design to construct an adsorption chamber within the aeration tank. This reduces the problems of adsorption material flow during aeration, which affects adsorption efficiency and increases subsequent cleaning difficulty, as seen in existing technologies. Furthermore, the design of a water guide channel creates a vortex in the water flow entering the adsorption chamber, thus moving the adsorption particles and preventing static particles from affecting adsorption efficiency. This also significantly increases the effective contact area between the adsorption particles and the water flow, enhancing adsorption performance. Additionally, the upper and lower pressure plates allow for the pressing of the upper plate after adsorption particles become ineffective, compressing the flocculent material and adsorption particles into a cake shape, facilitating pollutant treatment and recovery by operators. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a top view of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a top view of the lower pressure plate; Figure 4 This is a bottom view of the upper pressure plate; Figure 5 This is the side view of the component.

[0018] The reference numerals in the attached drawings represent: 1. Aeration tank; 11. Frame; 2. Upper pressure plate; 21. Cylinder; 22. Baffle; 3. Drive component; 31. Drive shaft; 32. Drive belt; 4. Lower pressure plate; 41. Water guide channel; 5. Adsorption chamber; 6. Check valve assembly; 61. Elastic ring; 62. Arc plate; 7. Aerator; 71. Pipeline. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are for explaining the utility model only and are not intended to limit the utility model. It should be noted that this utility model is already in the actual research and development stage.

[0020] Example 1 like Figures 1 to 5As shown, this embodiment includes an aeration tank 1, which is equipped with an aeration assembly and a filtration assembly. The aeration assembly is used to pump gas into the aeration tank 1. The aeration assembly includes an aerator 7, the output end of which is connected to a pipe 71. The aerator 7 is connected to the aeration tank 1 through the pipe. The filtration assembly includes a lower pressure plate 4 and a driving component 3. The lower pressure plate 4 is made of a porous material. In this embodiment, the lower pressure plate 4 is made of porous silica material. The driving component 3 is used to pump gas into the aeration tank 1. The drive unit 3 in this embodiment is an electric motor that drives the lower pressure plate 4 to rotate. The output end of the electric motor is provided with a transmission shaft 31, which is rotatably connected to the bottom wall of the aeration tank 1. The transmission shaft 31 is also connected to the lower pressure plate 4 via a transmission belt 32. The lower pressure plate 4 is rotatably connected to the inner wall of the aeration tank 1. The upper top wall of the lower pressure plate 4 has a groove, and the bottom wall of the groove has several water guide channels 41. The bottom walls of the water guide channels 41 are arranged at an incline, and the bottom walls of the water guide channels 41 are aligned with the top wall of the aeration tank 1. The distance between the bottom wall and the groove axis decreases as the distance between the bottom wall and the groove axis decreases. The bottom wall of the groove is arranged in a conical inclination, and the deepest part of the bottom wall is located at the axis of the groove. An upper pressure plate 2 is provided above the lower pressure plate 4. The aeration tank 1 is fixedly connected to the frame 11, and the upper pressure plate 2 is slidably connected to the frame 11 through a self-locking slide rail. The self-locking slide rail used in this embodiment is model HA7613. The bottom wall of the upper pressure plate 2 and the groove form an adsorption chamber 5. The axes of the output end and the input end of the adsorption chamber 5 are arranged along the tangent direction of the groove. The water guide channel 41 is used to generate a vortex in the water flow entering the adsorption chamber 5. The adsorption chamber 5 is provided with a number of adsorption particles for water purification. The material of the adsorption particles is diatomaceous earth. The maximum distance between the side wall of the upper pressure plate 2 and the side wall of the groove is less than the diameter of the adsorption particles. In this embodiment, the upper pressure plate 2 and the lower pressure plate 4 are arranged coaxially, and the bottom wall of the upper pressure plate 2 can conformally contact the bottom wall of the groove.

[0021] The specific implementation method is as follows: During the water treatment process using this solution, the positions of the upper pressure plate 2 and the lower pressure plate 4 are adjusted so that the upper pressure plate 2 is in a position that enters the groove but is a certain distance from the bottom of the groove, and this position ensures that the water guide trough 41 and other components can fix the position of the adsorbed particles to a certain extent. Then, the adsorbed particles are discharged into the aeration tank 1 along the input end of the adsorption chamber 5, and the driving component 3 is started simultaneously. The driving component 3 drives the lower pressure plate 4 to rotate.

[0022] Water flows into the adsorption chamber 5 from the tangential direction of the lower pressure plate 4. As the lower pressure plate 4 rotates, the water flows towards the side wall of the groove under the action of centrifugal force. After colliding with the side wall of the water guide channel 41, it moves upward along the side wall of the water guide channel 41. After colliding with the top wall of the upper pressure plate 2, it falls back to the bottom wall of the water guide channel 41 to carry out the next upward and downward movement, thereby generating a vortex.

[0023] During the above process, as the water flows, the particulate matter in the water is absorbed by the adsorbent particles to achieve preliminary adsorption treatment of the water. Due to the generation of eddies, the water flow has more contact time with the adsorbent particles, and the probability of the particulate matter in the water flow being captured by the adsorbent particles also increases. At the same time, with the generation of eddies, the probability of diatoms and other flocculents carried in the water flow colliding with each other increases significantly, making it easier for diatoms and other flocculents to combine from the loose network structure into larger flocculents, increasing the probability of them remaining inside the adsorption chamber 5.

[0024] Meanwhile, the design of the water guide channel 41 and the upper pressure plate 2 that can conformally contact it in this scheme makes the channel formed in the adsorption chamber 5 rise and fall, which greatly increases the path of water flow from the input end to the output end of the adsorption chamber 5. This causes the flocculent to collide with the adsorption particles and the edge of the water guide channel 41, thereby increasing the probability that the flocculent is intercepted by the adsorption particles and the water guide channel 41, and improving the filtration effect of flocculents such as diatoms.

[0025] Simultaneously, during operation, air is continuously pumped into the aeration tank 1 via the aerator 7, providing oxygen to the microorganisms attached to the adsorbed particles. This maintains the necessary survival conditions for aerobic microorganisms and promotes their efficiency in decomposing organic pollutants. Furthermore, because the pressure plate 4 used in this design is made of porous material, more gas can directly enter the adsorption chamber 5 through the bottom and side walls of the pressure plate 4 during aeration, increasing the contact area between the gas and the adsorbed particles. The eddies generated by the gas further promote the contact between particulate matter in the water and the adsorbed particles. At the same time, due to the effect of the pressure plate 4, the pressurized gas cannot directly act on the adsorbed particles, effectively preventing the shearing force generated by the gas from peeling flocculants from the adsorbed particles and the edges of the water guide trough 41, thus affecting the removal efficiency of the device for diatoms and other flocculent materials.

[0026] After the water flows from the input end to the output end of the adsorption chamber 5, it flows into the next process through the output end of the aeration tank 1. The operator judges the effectiveness of the adsorption particles based on the turbidity of the water flowing through the output end of the aeration tank 1. When the turbidity increases significantly compared to the initial use state, the adsorption particles may be ineffective. The operator stops injecting water into the device and then moves the upper pressure plate 2 downward through the self-locking slide rail. The bottom wall of the groove, the bottom wall of the water guide channel 41, and the bottom wall of the upper pressure plate 2 squeeze the adsorption particles and flocs in the adsorption chamber 5 until the adsorption particles and flocs are squeezed into a cake shape. Then, the upper pressure plate 2 can be lifted by the self-locking slide rail, and the cake-shaped adsorption particles and flocs can be taken out for subsequent recycling or disposal. After adding new adsorption particles into the groove, the upper pressure plate 2 is moved down to complete the reset of the device.

[0027] This design utilizes the upper pressure plate 2 and lower pressure plate 4 to confine the structure used for filtration and adsorption within a specific space. Compared to existing solutions using biofilms or biological packing materials, this design offers greater ease of installation and replacement. Furthermore, the driving component 3 and water guide channel 41 create eddies within the adsorption chamber 5, which in turn move the adsorbed particles, thus agitating them and enhancing their adsorption effect. Consequently, during operation, operators can reduce the operating power of the aerator 7 to compensate for the energy consumption of the driving component 3. Simultaneously, with the reduced power of the aerator 7 and the design of the lower pressure plate 4, this design exerts less shear force on the biofilm on the adsorbed particle surface compared to existing technologies. This reduces the likelihood of biofilm detachment during water flow, maintaining biofilm stability and enhancing its degradation effect on the water. It also reduces the large number of bubbles generated on the water surface in traditional aeration methods, effectively improving the operating environment of this device and subsequent treatment equipment.

[0028] In this design, by arranging the bottom wall of the groove at an inclination, the water flow inside the adsorption chamber 5, after impacting the top wall of the pressure plate 2, does not enter the adjacent water guide channel 41. Instead, when it impacts the side wall of the groove, it can also move upward along the bottom wall of the groove under the action of centrifugal force. Since the inclination angle of the bottom wall of the groove to the horizontal is different from that of the water guide channel 41, there is a significant difference in the flow velocity of the water flowing upward after colliding with the two. This causes the two to converge and generate a vortex, thereby further promoting the generation of vortex in the adsorption chamber 5 and further improving the adsorption effect of the device.

[0029] Meanwhile, this solution also reduces the risk of adsorbed particles leaving the adsorption chamber 5 through the gap between the upper pressure plate 2 and the groove during the adsorption process by setting a reasonable distance between the upper pressure plate 2 and the groove, thereby affecting the subsequent adsorption effect of the device.

[0030] Furthermore, this solution uses bio-diatomaceous earth as adsorbent particles. Compared to other materials, bio-diatomaceous earth is inexpensive and has a strong adsorption capacity. In addition, bio-diatomaceous earth has excellent biological adhesion and is an ideal carrier for microorganisms. This allows microorganisms to form a biofilm on the surface of the adsorbent particles at a relatively fast speed, thereby enabling aquatic microorganisms to efficiently degrade and separate the water.

[0031] Example 2 The difference from the above embodiment is that: a baffle 22 is slidably fitted on the upper pressure plate 2, and the sum of the areas of the bottom wall of the baffle 22 and the bottom wall of the upper pressure plate 2 is the same as the sum of the areas of the bottom wall of the groove and the bottom wall of the water guide channel 41. A linear actuator is also provided on the upper pressure plate 2. In this embodiment, the linear actuator is a cylinder 21. The cylinder 21 is fixedly connected to the upper pressure plate 2 by bolts, and the output end of the cylinder 21 is fixedly connected to the baffle 22 by bolts. The linear actuator is used to adjust the distance between the bottom wall of the upper pressure plate 2 and the bottom wall of the baffle 22.

[0032] The specific implementation method is as follows: During the use of this solution, the operator can adjust the position of the baffle 22 according to the pollution level of the water body to change the distance between the bottom wall of the upper pressure plate 2 and the bottom wall of the groove and the bottom wall of the water guide channel 41. Compared with a fixed upper pressure plate 2, this solution can adapt to the needs of different pollution environments. For example, in water bodies with abundant diatoms, the operator can lower the baffle 22, so that the height of the channel formed by the water guide channel 41, the baffle 22, and the upper pressure plate 2 decreases, thereby increasing the resistance to the flow of diatoms and other flocculents, making it easier for diatoms and other flocculents to be intercepted by the water guide channel 41 and adsorbed particles, thus improving the device's interception ability for diatoms and other particles. When facing situations with fewer flocculents but more particulate matter in the water body, the operator can move the baffle 22 upward, increasing the height of the channel formed by the water guide channel 41, the baffle 22, and the upper pressure plate 2, which can accommodate more adsorbed particles.

[0033] Simultaneously, when dealing with water bodies containing a large amount of flocculent matter such as diatoms, after the device has been operating for a certain period of time, the operator can close the input and output ends of the adsorption chamber 5. Then, the cylinder 21 is used to lower the baffle 22 until its bottom end is flush with the bottom end of the upper pressure plate 2. Subsequently, the operating power of the drive component 3 is increased. As the operating power of the drive component 3 increases, the drilling speed of the lower pressure plate 4 rises. The lower pressure plate 4 rises due to the shear force applied to the flocculent matter by the water flow, causing the flocculent matter to break down. Then, the connection between the output end of the adsorption chamber 5 and the next treatment device is cut off, and the output end of the adsorption chamber 5 is connected to the collection device. The input end of the adsorption chamber 5 is then opened, allowing water to enter the adsorption chamber 5 and flush the broken flocculent matter into the collection device. The next adsorption operation can then begin. During this process, as the lower pressure plate 4 rotates, the water flow is disturbed by the lower pressure plate 4, thereby improving the efficiency of heat exchange between the water flow and the lower pressure plate 4 and reducing the temperature rise during the rotation of the lower pressure plate 4, which could lead to mechanical damage.

[0034] Compared to the above embodiments, which use the upper pressure plate 2 to simultaneously compress adsorbent particles and flocculants into a cake for flocculant collection, this solution eliminates the need to replace adsorbent particles during the cleaning of the adsorption chamber 5, significantly reducing the operating cost. Furthermore, compared to solutions without baffle 22, this solution protects the upper pressure plate 2 with baffle 22, reducing the probability of damage to the upper pressure plate 2 caused by the lower pressure plate 4 or flocculants impacting it during rotation.

[0035] Example 3 The difference from the above embodiment is that the output end of the adsorption chamber 5 is provided with a check valve component 6, which is used to limit the flow direction of the fluid at the output end of the adsorption chamber 5.

[0036] The check valve assembly 6 includes an elastic ring 61, one end of which is bonded and fixed to the output end of the adsorption chamber 5. Several arc-shaped plates 62 are embedded in the elastic ring 61. When no fluid passes through the output end of the adsorption chamber 5, the projected area of ​​the elastic ring 61 is the same as the projected area of ​​the output end of the adsorption chamber 5, and the arc-shaped plates 62 are inclined relative to the flow cross section of the output end of the adsorption chamber 5.

[0037] When the force applied to the elastic ring 61 reaches the elastic limit of the elastic ring 61, the diameter of the circle formed by the end of the arc plate 62 away from the adsorption cavity 5 is smaller than the diameter of the adsorbed particles.

[0038] The specific implementation method is as follows: When using this solution, the design of the check valve component 6 prevents the backflow of water leaving the adsorption chamber 5, so as to avoid water from the next treatment device flowing back into the adsorption chamber 5 when the pumping of water into the adsorption chamber 5 stops, which would cause pollution to the adsorption chamber 5.

[0039] Simultaneously, during the rotation of the lower pressure plate 4, the water flow impacts the adsorbed particles. When the adsorbed particles move to the output end of the adsorption chamber 5, they are difficult to push the elastic ring 61 away from the adsorption chamber 5 due to the action of the elastic ring 61, thereby reducing the loss of adsorbed particles. At the same time, when the water flow is too large or the output end is blocked, as the water pressure inside the adsorption chamber 5 increases, the pressure applied to the elastic ring 61 causes the elastic ring 61 to deform more severely. When the elastic limit of the elastic ring 61 is exceeded, the elastic ring 61 is damaged, and the elastic ring 61 forms a channel that allows the adsorbed particles to pass through. When the adsorbed particles pass through the elastic ring 61, the arc plate 62 scrapes against the surface of the adsorbed particles to intercept the biofilm and flocculent matter on the surface of the adsorbed particles into the adsorption chamber 5, preventing them from causing pollution to subsequent equipment. This reduces the difficulty of cleaning subsequent equipment if the adsorbed particles carry pollutants into the subsequent equipment after the check valve component 6 is damaged.

[0040] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A diatomaceous earth device based on physical interception, comprising an aeration tank (1), wherein the aeration tank (1) is provided with an aeration component and a filtration component, the aeration component being used to pump gas into the aeration tank (1), characterized in that: The filter assembly includes a lower pressure plate (4) and a drive component (3). The drive component (3) is used to drive the lower pressure plate (4) to rotate. The upper top wall of the lower pressure plate (4) has a groove, and the bottom wall of the groove has several water guide grooves (41). An upper pressure plate (2) is provided above the lower pressure plate (4), and the bottom wall of the upper pressure plate (2) and the groove form an adsorption cavity (5). The axes of the output end and the input end of the adsorption cavity (5) are arranged along the tangent direction of the groove. The water guide grooves (41) are used to generate eddies in the water flow entering the adsorption cavity (5). Several adsorption particles for water purification are provided in the adsorption cavity (5).

2. The diatomaceous earth device based on physical interception according to claim 1, characterized in that: The bottom wall of the groove is arranged in a conical, inclined shape.

3. The diatomaceous earth device based on physical interception according to claim 1, characterized in that: The maximum distance between the sidewall of the upper pressure plate (2) and the sidewall of the groove is less than the diameter of the adsorbed particles.

4. The diatomaceous earth device based on physical interception according to claim 1, characterized in that: The adsorbent particles are made of bio-diatomaceous earth.

5. The diatomaceous earth device based on physical interception according to claim 1, characterized in that: The aeration assembly includes an aerator (7), the output end of which is connected to the water distribution channel of the aeration tank (1) via a pipeline (71).

6. The diatomaceous earth device based on physical interception according to claim 1, characterized in that: The material of the lower pressure plate (4) is a porous material.

7. The diatomaceous earth device based on physical interception according to claim 1, characterized in that: A baffle (22) is slidably fitted on the upper pressure plate (2). The sum of the areas of the bottom wall of the baffle (22) and the bottom wall of the upper pressure plate (2) is the same as the sum of the areas of the bottom wall of the groove and the bottom wall of the water guide channel (41). A linear actuator is also provided on the upper pressure plate (2). The linear actuator is used to adjust the distance between the bottom wall of the upper pressure plate (2) and the bottom wall of the baffle (22).

8. The diatomaceous earth device based on physical interception according to claim 1, characterized in that: The output end of the adsorption chamber (5) is provided with a check valve assembly (6), which is used to restrict the flow direction of the fluid at the output end of the adsorption chamber (5).

9. A diatomaceous earth device based on physical interception according to claim 8, characterized in that: The check valve assembly (6) includes an elastic ring (61), one end of which is fixedly connected to the output end of the adsorption chamber (5). Several arc-shaped plates (62) are embedded in the elastic ring (61). When no fluid passes through the output end of the adsorption chamber (5), the projected area of ​​the elastic ring (61) is the same as the projected area of ​​the output end of the adsorption chamber (5), and the arc-shaped plates (62) are inclined relative to the flow cross section of the output end of the adsorption chamber (5).

10. A diatomaceous earth device based on physical interception according to claim 9, characterized in that: When the force applied to the elastic ring (61) reaches the elastic limit of the elastic ring (61), the diameter of the circle formed by the end of the arc plate (62) away from the adsorption cavity (5) is smaller than the diameter of the adsorbed particles.

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