Adsorption column connecting mechanism for active carbon dynamic adsorption experiment

Abstract

The invention discloses an adsorption column connecting mechanism for an activated carbon dynamic adsorption experiment, and relates to the technical field of adsorption experiments, the adsorption column connecting mechanism comprises an ultrasonic oscillator and a conical flask, the ultrasonic oscillator is internally provided with a fixer for fixing the conical flask, the fixer is internally provided with the conical flask, and the conical flask is connected with the ultrasonic oscillator. A first rubber plug is arranged at a bottle opening of the conical bottle, a conveying pipe is fixedly mounted in the first rubber plug, and low-cost and standardized experimental equipment is modularly assembled (commercially available glass tubes are utilized to construct an adsorption column main body, a silica gel tube is utilized to realize directional transmission of fluid, and the silica gel plug and a sand core are combined to form a detachable sealing structure); in combination with flexible filling of universal fillers such as quartz sand and activated carbon, an innovative fluid path of flowing from bottom to top is constructed, and the risk that fine-particle fillers in a traditional device block a sand core is thoroughly avoided (under the same condition, a bottom-to-top flowing mode can prolong the continuous operation time of the device to more than 5 times that of a traditional top-to-bottom mode).

Description

Technical Field

[0001] The present invention relates to the technical field of adsorption experiments, and specifically to an adsorption column connection mechanism for dynamic adsorption experiments of activated carbon. Background Art

[0002] Activated carbon is a kind of carbon treated specially. Organic raw materials (such as fruit shells, coal, wood, etc.) are heated under the condition of isolating air to reduce non-carbon components (this process is called carbonization), and then react with gases. The surface is eroded to produce a structure with developed micropores (this process is called activation). Since the activation process is a microscopic process, that is, the surface erosion of a large number of molecular carbides is point erosion, countless tiny pores are formed on the surface of activated carbon. The micropore diameters on the surface of activated carbon are mostly between 2 and 50 nm. Even a small amount of activated carbon has a huge surface area. The surface area of each gram of activated carbon is 500 - 1500 m². Almost all applications of activated carbon are based on this characteristic of its huge surface area.

[0003] The existing technology has the following problems: In the dynamic adsorption experiment of activated carbon, when using <50 - mesh fine - particle activated carbon (particle size <0.3 mm), due to the design defect that the initial solution flows from top to bottom in a conventional sand - core chromatography column, serious blockage problems are extremely likely to occur. On the one hand, sub - micron - sized fine powder (<50 μm) existing in the fine - particle activated carbon is easily embedded in the pores of the sand - core filter plate (usually 20 - 100 μm), forming physical anchor points and adsorbing large - particle carbon to form a bridging structure, resulting in pore closure. On the other hand, the fluid shear force forms local stagnation zones on the sand - core surface, accelerating the deposition of carbon particles, and the selective enrichment of pollutants on the surface of carbon particles during the adsorption process further exacerbates the aggregation. Eventually, a sudden increase in pressure drop (experiments show that the column pressure can reach 10 - 15 times the initial value after blockage) and a decrease in flow rate are caused, forcing the experiment to be interrupted or leading to the complete failure of the entire chromatography column. This problem is particularly prominent in long - term experiments running for more than 72 hours. Summary of the Invention

[0004] To solve the above - mentioned technical problems, an adsorption column connection mechanism for dynamic adsorption experiments of activated carbon is provided, which solves the problem that in the dynamic adsorption experiment of activated carbon, when using <50 - mesh fine - particle activated carbon (particle size <0.3 mm), due to the design defect that the initial solution flows from top to bottom in a conventional sand - core chromatography column, serious blockage problems are extremely likely to occur.

[0005] To achieve the above - mentioned purpose, the technical solution adopted by the present invention is as follows: An adsorption column connection mechanism for the dynamic adsorption experiment of activated carbon, including an ultrasonic oscillator and a conical flask. Inside the ultrasonic oscillator, there is a holder for fixing the conical flask. Inside the holder, there is a conical flask. At the mouth of the conical flask, there is a first rubber stopper. Inside the first rubber stopper, a delivery pipe is fixedly installed. The upper end of the delivery pipe is connected to a silica gel tube. One end of the silica gel tube far from the delivery pipe is connected to one of the joints of a three-way joint. A peristaltic pump is arranged between the three-way joint and the delivery pipe, and the peristaltic pump abuts against the outer surface of the silica gel tube. One of the joints of the three-way joint is connected to an adsorption column. Another joint of the three-way joint is connected to a connecting pipe. One end of the connecting pipe far from the three-way joint is connected to another adsorption column. Between the two adsorption columns, there is an iron stand. On the outer surface of the iron stand, there are butterfly clips for respectively fixing the two adsorption columns. The peristaltic pump continuously and repeatedly squeezes the silica gel tube. The ultrasonic oscillator provides a stable oscillation environment for the experiment through high-frequency vibration to realize constant-temperature stirring of the liquid in the conical flask. The holder fixes the conical flask inside the ultrasonic oscillator to prevent the container from shifting due to vibration during the experiment and ensure the continuity and safety of the experimental operation. The first rubber stopper ensures that the liquid inside the conical flask will not splash out of the conical flask and at the same time prevents external impurities from entering the conical flask through the mouth of the conical flask. The peristaltic pump controls the liquid to sequentially enter the adsorption column through the delivery pipe, the silica gel tube and the three-way joint. The adsorption column adsorbs and processes the liquid. The iron stand serves as the support structure of the adsorption column, providing a stable experimental platform to ensure that the adsorption column remains vertical or at the required angle during the experiment and avoid solution leakage or uneven adsorption caused by inclination. The butterfly clips are arranged on the outer surface of the iron stand and are used to respectively fix the two adsorption columns. The adjustment function of the butterfly clips can adapt to adsorption columns of different sizes to ensure their stability without shaking, thus guaranteeing the accuracy and safety of the experimental operation.

[0006] Preferably, the adsorption column comprises a glass tube. Second rubber stoppers are arranged inside both ends of the glass tube. A first sand core layer and a second sand core layer are arranged on one side of the two second rubber stoppers close to each other. The first sand core layer is located below the second sand core layer. A first quartz sand layer is arranged on one side of the first sand core layer close to the second sand core layer. A second quartz sand layer is arranged on one side of the second sand core layer close to the first sand core layer. The thickness of the second quartz sand layer is less than that of the first quartz sand layer. An activated carbon layer is arranged between the first quartz sand layer and the second quartz sand layer. The glass tube is the main frame of the adsorption column, providing physical support for each internal layer and forming a closed adsorption space with the two second rubber stoppers. Its transparent property facilitates observing the solution flow state, the change of the activated carbon layer and the adsorption effect during the experiment. The solution enters from the lower end and sequentially passes through the first sand core layer, the first quartz sand layer, the activated carbon layer, the second quartz sand layer and the second sand core layer to achieve step-by-step filtration, buffering and adsorption, ensuring efficient treatment. The first sand core layer and the second sand core layer support the first quartz sand layer, the second quartz sand layer and the activated carbon layer to maintain the stability of the interlayer structure. The first quartz sand layer preliminarily buffers the solution entering the adsorption column, reduces the flow rate and enables the solution to uniformly penetrate into the activated carbon layer. The second quartz sand layer further homogenizes the adsorbed solution to avoid the flow rate difference caused by local adsorption saturation of the activated carbon layer. The activated carbon layer removes the target pollutants in the solution through physical adsorption. During the continuous flow of the solution, the activated carbon layer captures the pollutants in real time to simulate the actual purification scenario.

[0007] Preferably, a first infusion tube and a second infusion tube are respectively arranged inside the two second rubber stoppers. The first infusion tube is located at the lower end of the glass tube, and the other end of the first infusion tube is communicated with one of the joints of the three-way joint.

[0008] Preferably, an initial solution is contained inside the conical flask, and the end of the delivery tube far from the silica gel tube is located at the bottom of the conical flask.

[0009] Preferably, the three-way joint can be replaced with a four-way joint or a five-way joint, and the number of adsorption columns corresponds to the joints.

[0010] Preferably, the peristaltic pump makes the liquid in the silica gel tube flow from the delivery tube to the three-way joint.

[0011] Preferably, the silica gel tube can be made of platinum-cured silica gel tube or fumed silica gel tube.

[0012] Preferably, the conical flask is made of quartz or borosilicate.

[0013] Preferably, both the first rubber stopper and the second rubber stopper are frustum-shaped.

[0014] Compared with the prior art, the advantages of the present invention are as follows: By setting up an ultrasonic oscillator, a fixator, a conical flask, a first rubber stopper, a delivery pipe, a silica gel tube, a three-way joint, a peristaltic pump, and an adsorption column, the ultrasonic oscillator, the fixator, the conical flask, the first rubber stopper, the delivery pipe, the silica gel tube, the three-way joint, the peristaltic pump, and the adsorption column are all low-cost and standardized experimental equipment. Through modular assembly of low-cost and standardized experimental equipment (using commercially available glass tubes to construct the main body of the adsorption column, silica gel tubes to achieve directional fluid transmission, and a combination of silica gel plugs and sand cores to form a detachable sealing structure), combined with flexible filling of general-purpose fillers such as quartz sand and activated carbon, an innovative fluid path flowing from bottom to top is constructed, completely avoiding the risk of blockage of the sand core by fine particle fillers in traditional devices (under the same conditions, the bottom-to-top flow mode can extend the continuous operation time of the device to more than 5 times that of the traditional top-to-bottom mode), and significantly reducing the equipment cost (the total cost is only 15% - 20% of that of commercial chromatography columns). Its open design supports rapid replacement of filler types (such as molecular sieves, ion exchange resins) or adjustment of filler gradation (such as mixing activated carbon and quartz sand in a mass ratio of 1:3), and can seamlessly adapt to multiple liquid-solid adsorption scenarios such as heavy metal adsorption, organic pollutant removal, and drug purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic three-dimensional structure diagram of the present invention; Figure 2 is a schematic internal structure diagram of the adsorption column in the present invention.

[0016] The reference numerals in the figure are: 1, ultrasonic oscillator; 2, fixator; 3, conical flask; 4, first rubber stopper; 5, delivery pipe; 6, silica gel tube; 7, three-way joint; 8, peristaltic pump; 9, adsorption column: 901, glass tube; 902, second rubber stopper; 903, first sand core layer; 904, second sand core layer; 905, first quartz sand layer; 906, second quartz sand layer; 907, activated carbon layer; 10, connecting pipe; 11, iron stand; 12, butterfly clip; 13, first infusion pipe; 14, second infusion pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0018] Refer to Figure 1-2As shown in the figure, the adsorption column 9 connection mechanism for the dynamic adsorption experiment of activated carbon includes an ultrasonic oscillator 1 and a conical flask 3. Inside the ultrasonic oscillator 1, there is a holder 2 for fixing the conical flask 3. Inside the holder 2, there is a conical flask 3. At the mouth of the conical flask 3, there is a first rubber stopper 4. Inside the first rubber stopper 4, a delivery pipe 5 is fixedly installed. The upper end of the delivery pipe 5 is connected to a silica gel tube 6. One end of the silica gel tube 6 away from the delivery pipe 5 is connected to one of the connectors of a three-way joint 7. Between the three-way joint 7 and the delivery pipe 5, there is a peristaltic pump 8, and the peristaltic pump 8 abuts against the outer surface of the silica gel tube 6. One of the connectors of the three-way joint 7 is connected to the adsorption column 9. Another connector of the three-way joint 7 is connected to a connecting pipe 10. One end of the connecting pipe 10 away from the three-way joint 7 is connected to another adsorption column 9. Between the two adsorption columns 9, there is an iron stand 11. On the outer surface of the iron stand 11, there are butterfly clips 12 for respectively fixing the two adsorption columns 9. The peristaltic pump 8 continuously and repeatedly squeezes the silica gel tube 6. The ultrasonic oscillator 1 provides a stable oscillation environment for the experiment through high-frequency vibration, realizing constant-temperature stirring of the liquid in the conical flask 3. The holder 2 fixes the conical flask 3 inside the ultrasonic oscillator 1, preventing the container from shifting due to vibration during the experiment, ensuring the continuity and safety of the experimental operation. The first rubber stopper 4 ensures that the liquid inside the conical flask 3 does not splash out of the conical flask 3, and at the same time prevents external impurities from entering the conical flask 3 through the mouth of the conical flask 3. The peristaltic pump 8 controls the liquid to sequentially enter the adsorption column 9 through the delivery pipe 5, the silica gel tube 6 and the three-way joint 7. The adsorption column 9 adsorbs and processes the liquid. The iron stand 11 serves as the support structure for the adsorption column 9. The iron stand 11 provides a stable experimental platform, ensuring that the adsorption column 9 remains vertical or at the required angle during the experiment, avoiding solution leakage or uneven adsorption caused by tilting. The butterfly clips 12 are arranged on the outer surface of the iron stand 11 and are used to respectively fix the two adsorption columns 9. The adjustment function of the butterfly clips 12 can adapt to adsorption columns 9 of different sizes, ensuring that they are stable and do not shake, thus guaranteeing the accuracy and safety of the experimental operation.

[0019] As Figure 2As shown in the figure, the adsorption column 9 includes a glass tube 901. Inside both ends of the glass tube 901, there are second rubber stoppers 902. On the side where the two second rubber stoppers 902 approach each other, there are a first sand core layer 903 and a second sand core layer 904. The first sand core layer 903 is located below the second sand core layer 904. On the side of the first sand core layer 903 close to the second sand core layer 904, there is a first quartz sand layer 905. On the side of the second sand core layer 904 close to the first sand core layer 903, there is a second quartz sand layer 906. The thickness of the second quartz sand layer 906 is less than that of the first quartz sand layer 905. Between the first quartz sand layer 905 and the second quartz sand layer 906, there is an activated carbon layer 907. The glass tube 901 is the main framework of the adsorption column 9, providing physical support for each internal layer and forming a closed adsorption space with the two second rubber stoppers 902. Its transparent property facilitates observing the solution flow state, the change of the activated carbon layer 907, and the adsorption effect during the experiment. The solution enters from the lower end and passes through the first sand core layer 903, the first quartz sand layer 905, the activated carbon layer 907, the second quartz sand layer 906, and the second sand core layer 904 in sequence, achieving step-by-step filtration, buffering, and adsorption to ensure efficient treatment. The first sand core layer 903 and the second sand core layer 904 support the first quartz sand layer 905, the second quartz sand layer 906, and the activated carbon layer 907, maintaining the stability of the interlayer structure. The first quartz sand layer 905 preliminarily buffers the solution entering the adsorption column 9, reducing the flow rate and enabling the solution to uniformly penetrate into the activated carbon layer 907. The second quartz sand layer 906 further homogenizes the adsorbed solution, avoiding flow rate differences caused by local adsorption saturation of the activated carbon layer 907. The activated carbon layer 907 removes the target pollutants in the solution through physical adsorption. During the continuous flow of the solution, the activated carbon layer 907 captures the pollutants in real time, simulating the actual purification scenario.

[0020] As Figure 2 shown in the figure, inside the two second rubber stoppers 902, there are a first infusion tube 13 and a second infusion tube 14 respectively. The first infusion tube 13 is located at the lower end of the glass tube 901, and the other end of the first infusion tube 13 is connected to one of the connectors in the three-way joint 7. The first infusion tube 13 serves as the liquid inlet of the adsorption column 9, introducing the solution from the three-way joint 7 into the interior of the glass tube 901 to ensure that the solution can uniformly penetrate into the activated carbon layer 907 from the lower end, realizing the dynamic adsorption process. The adsorbed liquid leaves through the second infusion tube 14. The infusion tubes are embedded inside the second rubber stoppers 902 to ensure the sealing at both ends of the adsorption column 9, preventing solution leakage or entry of external pollutants. The first infusion tube 13 and the second infusion tube 14 jointly form a directional flow path for the solution, ensuring that the solution can fully contact the activated carbon layer 907 to achieve efficient adsorption.

[0021] As Figure 1As shown, the conical flask 3 contains the initial solution. One end of the delivery tube 5 away from the silica gel tube 6 is located at the bottom of the conical flask 3. The conical flask 3 serves as a container for the experimental solution, used to store the initial solution and provide a continuous solution supply to the subsequent adsorption column 9 through the delivery tube 5. The capacity of the conical flask 3 can be adjusted according to experimental requirements, suitable for small-scale laboratory research or pilot-scale experiments. At the same time, it is convenient to replace solutions with different components or concentrations to meet diverse experimental conditions. The transparent material (such as glass or quartz) of the conical flask 3 facilitates the experimenter to observe the height of the liquid level drop. The end of the delivery tube 5 is located at the bottom of the conical flask 3 to ensure that the solution can be completely extracted, avoiding delivery interruption or waste of residual solution caused by the liquid level drop. At the same time, the delivery tube 5 extending deep into the bottom of the flask can reduce the contact between the solution surface and air, reducing concentration changes caused by solution volatilization or air mixing and ensuring the stability of the solution composition during the experiment.

[0022] As Figure 1 shown, the three-way joint 7 can be replaced with a four-way joint or a five-way joint. The number of adsorption columns 9 corresponds to the joints. The user can replace the three-way joint 7 with other multi-way joints according to needs to meet the requirement of ensuring the same inlet conditions in the adsorption column 9 when exploring the adsorption effects of different adsorbents on the same initial solution. At the same time, by replacing the three-way joint 7 with a four-way or five-way joint, the experimental system can easily increase the number of adsorption columns 9 to adapt to different-scale experimental requirements. Each joint corresponds to an adsorption column 9 to ensure that the solution can be evenly distributed to the designated adsorption column 9, avoiding differences in adsorption efficiency caused by uneven flow splitting. The arrangement of the adsorption materials in different adsorption columns 9 can be different, including but not limited to: quartz sand, activated carbon as adsorbents, the filling amount of adsorbents, and the filling order of multiple adsorbents, so as to realize the timely comparison of the adsorption effects of different adsorption columns 9.

[0023] As Figure 1 shown, the peristaltic pump 8 makes the liquid in the silica gel tube 6 flow from the delivery tube 5 to the three-way joint 7. The silica gel tube 6 installed in the pump chamber is periodically squeezed by squeezing components such as rollers or pressing blocks. The closed part of the squeezed silica gel tube 6 forms a "piston" to push the fluid forward; when the squeezing component leaves, the silica gel tube 6 returns to its original state by its own elasticity, forming a negative pressure in the silica gel tube 6, thus sucking the fluid from the inlet end. Repeating this process, through the continuous rotation of the squeezing component, the fluid can be continuously transported from the inlet to the outlet, and the flow rate of fluid delivery can be controlled by adjusting the rotation speed of the squeezing component.

[0024] As Figure 1As shown in the figure, the silica gel tube 6 can be a platinum-cured silica gel tube or a fumed silica gel tube. Platinum-cured silica gel tube: The platinum-cured silica gel tube uses the platinum-curing process to achieve cross-linking of silica gel molecular chains through high-temperature catalysis, without residual vulcanizing agents or catalysts, avoiding the introduction of organic impurities (such as heavy metals, sulfur elements) into the solution. It is especially suitable for trace pollutant analysis or the transportation of high-purity solutions. The platinum-cured silica gel tube can withstand strong acid and strong alkali solutions with a pH value of 1 to 14, and is suitable for wastewater treatment experiments containing corrosive components (such as hydrochloric acid, sodium hydroxide), preventing the silica gel tube 6 from cracking or swelling due to corrosion. The platinum-cured silica gel tube meets food-grade or medical-grade standards and is suitable for the transportation of bioactive substances (such as enzyme preparations, drug solutions), avoiding the release of toxic substances and affecting experimental results. Its surface is smooth and has no microporous structure, reducing the adsorption of organic substances (such as benzene series, polycyclic aromatic hydrocarbons) in the solution. The platinum-cured silica gel tube avoids calculation errors in adsorption efficiency caused by solute loss; Fumed silica gel tube: The fumed silica gel tube uses the fumed process to achieve uniform distribution of molecular chains, with a tensile strength increased by more than 30%. It is suitable for high-pressure (such as the extrusion strength of the peristaltic pump 8) or frequently bent scenarios (such as pipeline layout when laboratory space is limited). After being under long-term pressure, the rebound rate of the fumed silica gel tube > 95%, ensuring a constant pipe diameter during the transportation of the peristaltic pump 8 and avoiding flow fluctuations caused by changes in the pipe diameter. The light transmittance of the fumed silica gel tube ≥ 92%, facilitating experimenters to observe whether there are residual bubbles in the pipeline and promptly detecting abnormalities; Experimenters can select the corresponding material of the silica gel tube 6 according to the initial liquid.

[0025] As Figure 1 shown in the figure, the conical flask 3 is made of quartz or borosilicate. Quartz: Quartz (SiO2 content ≥ 99.9%) can withstand all strong acids (such as concentrated sulfuric acid, nitric acid) and strong alkalis (such as sodium hydroxide solution) except hydrofluoric acid (HF), avoiding the corrosion of glass and resulting in the precipitation of solutes or the rupture of the container. Quartz can withstand being directly immersed in cold water after being heated to 1100°C without cracking, and is suitable for experiments requiring high-temperature sterilization or thermal desorption; Borosilicate: It can withstand solutions with a pH value of 1 to 12 (such as dilute acids, weak alkalis), but long-term contact with concentrated phosphoric acid or strong alkalis should be avoided. At the same time, a dense silicon oxide layer is formed on the surface of borosilicate to resist water vapor erosion, and it is suitable for long-term storage of aqueous solutions; Select the corresponding material of the conical flask 3 according to the characteristics of the initial liquid itself.

[0026] As shown in the figure, both the first rubber stopper 4 and the second rubber stopper 902 are frustum-shaped. The conical outer wall of the frustum-shaped rubber stopper forms a linear contact with the container mouth, generating a wedge-shaped sealing effect through extrusion. The first rubber stopper 4 (located at the fluid inlet) bears the initial high pressure (such as the outlet pressure of the peristaltic pump 8 being 0.3 - 0.5 MPa), and the two second rubber stoppers 902 (located at the top and bottom of the adsorption column 9 respectively) maintain long-term low-pressure sealing (such as 0.05 - 0.1 MPa). The pressure gradient adaptation is achieved through the difference in cone angles (for example, the cone angle of the first rubber stopper 4 is 15°, and the cone angle of the second rubber stopper 902 is 10°). The thermal conductivity of the rubber stopper material is <0.2 W / (m·K), avoiding seal failure caused by local overheating. At the same time, the conical surface structure can compensate for the difference in the thermal expansion coefficients of glass at high temperatures.

[0027] Working principle: The ultrasonic oscillator 1 provides a stable oscillation environment for the experiment through high-frequency vibration, realizing constant-temperature stirring of the liquid in the conical flask 3. The fixture 2 fixes the conical flask 3 inside the ultrasonic oscillator 1, preventing the container from shifting due to vibration during the experiment, and ensuring the continuity and safety of the experimental operation. The first rubber stopper 4 ensures that the liquid inside the conical flask 3 does not splash out of the conical flask 3, and at the same time prevents external impurities from entering the conical flask 3 through the mouth of the conical flask 3. The peristaltic pump 8 controls the liquid to enter the adsorption column 9 sequentially through the delivery tube 5, the silica gel tube 6, and the three-way joint 7. The adsorption column 9 performs adsorption treatment on the liquid. The iron stand 11 serves as the support structure for the adsorption column 9, providing a stable experimental platform to ensure that the adsorption column 9 remains vertical or at the required angle during the experiment, avoiding solution leakage or uneven adsorption caused by tilting. The butterfly clip 12 is set on the outer surface of the iron stand 11 and is used to fix the two adsorption columns 9 respectively. The adjustment function of the butterfly clip 12 can adapt to adsorption columns 9 of different sizes, ensuring that they are stable and do not shake, thus guaranteeing the accuracy and safety of the experimental operation; The glass tube 901 is the main framework of the adsorption column 9, providing physical support for each internal layer and forming a closed adsorption space with the two second rubber stoppers 902. Its transparent property facilitates observing the solution flow state, the change of the activated carbon layer 907, and the adsorption effect during the experiment. The solution enters from the lower end and sequentially passes through the first sand core layer 903, the first quartz sand layer 905, the activated carbon layer 907, the second quartz sand layer 906, and the second sand core layer 904, realizing step-by-step filtration, buffering, and adsorption to ensure efficient treatment. The first sand core layer 903 and the second sand core layer 904 support the first quartz sand layer 905, the second quartz sand layer 906, and the activated carbon layer 907, maintaining the stability of the interlayer structure. The first quartz sand layer 905 preliminarily buffers the solution entering the adsorption column 9, reducing the flow rate and enabling the solution to uniformly penetrate into the activated carbon layer 907. The second quartz sand layer 906 further homogenizes the adsorbed solution, avoiding flow rate differences caused by local adsorption saturation of the activated carbon layer 907. The activated carbon layer 907 removes the target pollutants in the solution through physical adsorption. During the continuous flow of the solution, the activated carbon layer 907 captures the pollutants in real time, simulating the actual purification scenario.

[0028] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. Adsorption column (9) connection mechanism for dynamic adsorption experiment of activated carbon, comprising an ultrasonic oscillator (1) and a conical flask (3), characterized in that: Inside the ultrasonic oscillator (1), there is a holder (2) for fixing the conical flask (3). Inside the holder (2), there is a conical flask (3). At the mouth of the conical flask (3), there is a first rubber stopper (4). Inside the first rubber stopper (4), a delivery pipe (5) is fixedly installed. The upper end of the delivery pipe (5) is connected to a silica gel tube (6). One end of the silica gel tube (6) far from the delivery pipe (5) is connected to one of the joints of a three-way joint (7). A peristaltic pump (8) is arranged between the three-way joint (7) and the delivery pipe (5), and the peristaltic pump (8) abuts against the outer surface of the silica gel tube (6). One of the joints of the three-way joint (7) is connected to an adsorption column (9). Another joint of the three-way joint (7) is connected to a connecting pipe (10). One end of the connecting pipe (10) far from the three-way joint (7) is connected to another adsorption column (9). Between the two adsorption columns (9), there is an iron stand (11). On the outer surface of the iron stand (11), there are butterfly clips (12) for respectively fixing the two adsorption columns (9).

2. The connecting mechanism of the adsorption column (9) for the dynamic adsorption experiment of activated carbon according to claim 1, characterized in that: The adsorption column (9) includes a glass tube (901). Inside both ends of the glass tube (901), there are second rubber stoppers (902). On one side where the two second rubber stoppers (902) are close to each other, there are a first sand core layer (903) and a second sand core layer (904). The first sand core layer (903) is located below the second sand core layer (904). On one side of the first sand core layer (903) close to the second sand core layer (904), there is a first quartz sand layer (905). On one side of the second sand core layer (904) close to the first sand core layer (903), there is a second quartz sand layer (906). The thickness of the second quartz sand layer (906) is less than that of the first quartz sand layer (905). An activated carbon layer (907) is arranged between the first quartz sand layer (905) and the second quartz sand layer (906).

3. The adsorption column (9) connection mechanism for the dynamic adsorption experiment of activated carbon according to claim 2, characterized in that: Inside the two second rubber stoppers (902), there are respectively a first infusion tube (13) and a second infusion tube (14). The first infusion tube (13) is located at the lower end of the glass tube (901), and the other end of the first infusion tube (13) is connected to one of the joints of the three-way joint (7).

4. The connection mechanism of the adsorption column (9) for the dynamic adsorption experiment of activated carbon according to claim 1, characterized in that: The inside of the conical flask (3) is filled with an initial solution. One end of the delivery pipe (5) far from the silica gel tube (6) is located at the bottom of the conical flask (3).

5. The connecting mechanism of the adsorption column (9) for the dynamic adsorption experiment of activated carbon according to claim 1, characterized in that: The three-way joint (7) can be replaced with a four-way joint or a five-way joint, and the number of adsorption columns (9) corresponds to the number of joints.

6. The connecting mechanism of the adsorption column (9) for the dynamic adsorption experiment of activated carbon according to claim 1, characterized in that: The peristaltic pump (8) makes the liquid in the silica gel tube (6) flow from the delivery pipe (5) to the three-way joint (7).

7. The connecting mechanism of the adsorption column (9) for the dynamic adsorption experiment of activated carbon according to claim 1, characterized in that: The silica gel tube (6) can be a platinum-cured silica gel tube or a fumed silica gel tube.

8. The connecting mechanism of the adsorption column (9) for the dynamic adsorption experiment of activated carbon according to claim 1, wherein: The conical flask (3) is made of quartz or borosilicate.

9. The connection mechanism of the adsorption column (9) for the dynamic adsorption experiment of activated carbon according to claim 2, characterized in that: Both the first rubber stopper (4) and the second rubber stopper (902) are frustum-shaped.

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