Device for detecting activated carbon by spectrophotometric method

Abstract

The utility model relates to the technical field of activated carbon detection, in particular to a spectrophotometric activated carbon detection device which comprises a shell, a control panel, a medicine storage tank, four groups of mixing modules, an analysis module and a waste liquid collection box. The control panel is located on the upper portion of the shell. A medicine storage tank is arranged below the control panel and located on the side face of the shell. The four groups of mixing modules are arranged at the upper part of the shell and are connected with the medicine storage tank; the four mixing modules are connected with the analysis module and the waste liquid collecting box respectively, the analysis module is distributed in the central area of the shell, and the waste liquid collecting box is located at the bottom of the device. The activated carbon adsorption performance evaluation device has the advantages that the accuracy of activated carbon adsorption performance evaluation is greatly improved, the methylene blue adsorption capacity of activated carbon can be sensitively reflected by accurately measuring absorbance changes under specific wavelengths, accordingly, the adsorption efficiency of the activated carbon can be accurately evaluated, and the activated carbon adsorption performance evaluation device is simple to operate, space-saving and easy to mount.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection of methylene blue adsorption value of activated carbon, and particularly relates to a device for detecting activated carbon using a spectrophotometric method. Background Art

[0002] Activated carbon, as a highly effective adsorbent, is widely used in water treatment, air purification, medicine, food processing, and other fields. Its adsorption performance is directly related to its effectiveness, making accurate measurement of activated carbon's adsorption capacity crucial. The methylene blue adsorption value is a key indicator for evaluating activated carbon's adsorption performance. The higher the methylene blue adsorption value, the stronger the activated carbon's decolorization ability. Methylene blue adsorption devices are primarily used in the textile and bleaching industries to adsorb toxic and hazardous substances. Spectrophotometry, as a rapid, sensitive, and accurate analytical method, has been introduced to test the adsorption properties of activated carbon. Spectrophotometry typically involves preparing an activated carbon adsorbent solution of a certain concentration. The solution then adsorbs a specific amount of organic or inorganic pollutants and measures the absorbance change of the adsorbed solution using a spectrophotometer. By analyzing the absorbance change, the amount of pollutants adsorbed by the activated carbon can be inferred, thereby assessing its adsorption performance. Existing spectrophotometric methods for activated carbon testing still have limitations, typically requiring the sample to be divided into multiple groups and the arithmetic mean of the test data from these multiple groups to be calculated. However, current testing often requires too many instruments to conduct multiple experiments simultaneously, resulting in low efficiency. Furthermore, some existing devices simply place each component separately, taking up a lot of space and being extremely cumbersome to operate. This often results in confusion among reagent bottles and can lead to safety accidents. Therefore, there is an urgent need to develop an activated carbon testing device that is simple to operate, space-saving, and easy to install. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a spectrophotometric activated carbon detection device which is simple to operate, saves space and is easy to install.

[0004] In order to achieve the above purpose, the technical solutions adopted by the present utility model are as follows:

[0005] A spectrophotometric activated carbon detection device comprises a housing, a control panel, a drug storage tank, four mixing modules, an analysis module, and a waste liquid collection box. The control panel is located above the detection device, and a drug storage tank is provided below the control panel for controlling the switching of various valves in the device, the addition of reagents to the mixing module, and stirring operations. The mixing module is arranged above the housing and connected to the drug storage tank, which contains a methylene blue solution. The mixing module is respectively connected to the analysis module and the waste liquid collection box. The waste liquid collection box is located at the bottom of the detection device and is used to collect waste liquid generated by the experiment.

[0006] Furthermore, the mixing module includes a sampling port, a mixing and stirring chamber, a stirring rod, a filtrate storage chamber and a filtration chamber. The sampling port is arranged at the top of the shell, and the activated carbon sample for experimental measurement is placed here. A mixing and stirring chamber is arranged below. The mixing and stirring chamber is connected to the medicine storage tank and is provided with a stirring rod inside. When the methylene blue solution is added, stirring begins. The top of the filtrate storage chamber is connected to the mixing and stirring chamber through a first solenoid valve, and the bottom is connected to the filtration chamber through an automatic partition. The filtration chamber is provided with 3-4 layers of double-circle medium-speed filter paper, and the bottom is connected to the analysis module. The analysis module includes four detection vessels and a spectrophotometer. The filtration chamber is connected to the detection vessel through a first solenoid valve, and the spectrophotometer is arranged on one side of the detection vessel.

[0007] Furthermore, the stirring rod of the mixing and stirring chamber is equipped with a rotating track, the rotation speed is set to 200r / min, and the stirring time is 30min. A liquid flow meter is respectively provided between the mixing and stirring chamber and the drug storage tank, and the liquid flow meter can accurately control the volume of the methylene blue solution added to the mixing and stirring chamber.

[0008] Furthermore, the sampling port is separated from the mixing and stirring chamber below by a movable arc baffle, which is equipped to prevent liquid splashing during stirring; a second solenoid valve and a third solenoid valve are provided at the bottom of the filter chamber, the second solenoid valve controls the solution to flow to the detection vessel, and the third solenoid valve controls it to flow into the waste liquid collection chamber. During the experiment, the third solenoid valve is closed and the second solenoid valve is opened to control the solution to flow to the detection vessel. After the experiment is completed, the second solenoid valve is closed and the third solenoid valve is opened to control it to flow into the waste liquid collection chamber.

[0009] Furthermore, the detection vessel is a 10 mm cuvette with a guide rail at the bottom on which the detection vessel can be moved; the detection vessel contains pure water as a blank sample, a cover is provided on the top of the detection vessel 15, and the spectrophotometer is a variable light source.

[0010] Furthermore, the control panel includes a storage chip and a microcontroller. The microcontroller is a programmable interrupt controller PIC series, and the storage chip is a non-volatile flash memory technology NOR flash memory chip.

[0011] When using this device to simply detect the activated carbon methylene blue value, first perform the calibration step, which is as follows: Aim the light source at the pure water sample, set the absorbance to zero, and set it to 0.1±0.02 for the sample to pass the test, and then perform sample calculations. Otherwise, if the absorbance is high, reduce the amount of methylene blue solution added; if the absorbance is low, increase the amount of methylene blue solution added;

[0012] The calculation formula is as follows,

[0013] Where: ρ is the concentration of methylene blue solution, in milligrams per milliliter (mg / mL);

[0014] V——The volume of methylene blue solution consumed by the test sample, in milliliters (mL);

[0015] m——the numerical value of the sample mass, in grams (g);

[0016] E——adsorption capacity;

[0017] After calculation, the E value is output.

[0018] Compared with the prior art, the technical progress achieved by this utility model is:

[0019] 1. The utility model is provided with a shell, a control panel, a drug storage tank, four groups of mixing modules, an analysis module and a waste liquid collection box. Its overall structural combination is relatively simple, occupies a small space, is relatively easy to install, is relatively simple to operate, and is not prone to problems such as confusion of reagent bottles during operation, thereby reducing the occurrence of safety accidents; and multiple groups of experiments can be carried out at the same time, thereby improving experimental efficiency.

[0020] 2. The utility model adopts spectrophotometry to detect the adsorption performance of activated carbon, which can achieve significant technical effects. First, the application of the utility model greatly improves the efficiency and accuracy of the evaluation of the adsorption performance of activated carbon. By accurately measuring the absorbance change at a specific wavelength, the adsorption amount of methylene blue by activated carbon can be sensitively reflected, thereby accurately evaluating its adsorption efficiency; secondly, the determination speed of the utility model is fast, economical and feasible, and the operation process is simplified. It can measure the methylene blue characteristic value of activated carbon in a simpler and more efficient manner, and quickly reflect the adsorption capacity of activated carbon; spectrophotometry reduces the use of chemical reagents and reduces energy consumption, while maintaining a higher analytical throughput, which is suitable for large-scale activated carbon quality control and production monitoring, and can produce significant technical effects such as high efficiency, high sensitivity, high selectivity, cost-effectiveness, safety and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0022] In the attached figure:

[0023] Figure 1 A schematic diagram of the structure of a spectrophotometric detection device for activated carbon provided in an embodiment of the present utility model;

[0024] In the picture:

[0025] 1-housing; 2-control panel; 3-drug storage tank; 4-mixing and stirring chamber; 5-filtrate storage chamber; 6-filtration chamber; 7-sampling port; 8-arc baffle; 9-stirring rod; 10-first solenoid valve; 11-automatic baffle; 12-liquid flowmeter; 13-second solenoid valve; 14-third solenoid valve; 15-detection vessel; 16-spectrophotometer; 17-waste liquid collection box; 18-track. DETAILED DESCRIPTION

[0026] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The following embodiments of the present invention will be described in conjunction with the accompanying drawings.

[0027] like Figure 1 As shown, a spectrophotometric detection device for activated carbon provided in this embodiment includes a shell 1, a control panel 2, a drug storage tank 3, four groups of mixing modules, an analysis module and a waste liquid collection box 17. The control panel 2 is located at the upper part of the shell 1, and a drug storage tank 3 is provided below the control panel 2. The drug storage tank 3 is located on the side of the shell 1 and is used to control the switching of each valve in the device, adding reagents to the mixing module and stirring operations. The mixing module is arranged above the shell 1 and is connected to the drug storage tank 3. The drug storage tank 3 contains methylene blue solution. The mixing module is respectively connected to the analysis module and the waste liquid collection box 17. The waste liquid collection box 17 is located at the bottom of the detection device. The waste liquid collection box is used to collect waste liquid generated by the experiment.

[0028] As a preferred structure, Figure 1 As shown, the mixing module includes a sampling port 7, a mixing and stirring chamber 4, a stirring rod 9, a filtrate storage chamber 5 and a filter chamber 6. The sampling port 7 is arranged at the top of the shell 1, and the activated carbon sample for experimental measurement is put in from here. A mixing and stirring chamber 4 is arranged below. The mixing and stirring chamber 4 is connected to the medicine storage tank 3, and a stirring rod 9 is arranged inside it. When the methylene blue solution is added, stirring begins. The top of the filtrate storage chamber 5 is connected to the mixing and stirring chamber 4 through the first solenoid valve 10, and the bottom is connected to the filter chamber 6 through the automatic partition 11. The filter chamber 6 is provided with 3-4 layers of double-circle medium-speed filter paper, and the bottom is connected to the analysis module. The analysis module includes four detection vessels 15 and a spectrophotometer 16. The filter chamber 6 is connected to the detection vessel 15 through the first solenoid valve 10, and the spectrophotometer 16 is arranged on one side of the detection vessel 15.

[0029] In a specific embodiment of the present invention, Figure 1As shown, the stirring rod 9 of the mixing and stirring chamber 4 is equipped with a rotating track, the rotation speed is set to 200r / min, the stirring time is 30min, and a liquid flow meter 12 is respectively provided between the mixing and stirring chamber 4 and the drug storage tank 9. The liquid flow meter 12 can accurately control the volume of the methylene blue solution added to the mixing and stirring chamber 4.

[0030] When assembling, Figure 1 As shown, the sample dispensing port 7 is separated from the mixing and stirring chamber 4 below by a movable arc-shaped baffle 8, and the arc-shaped baffle 8 is provided to prevent liquid splashing during stirring; a second solenoid valve 13 and a third solenoid valve 14 are provided at the bottom of the filter chamber 6, the second solenoid valve 13 controls the solution to flow to the detection vessel 15, and the third solenoid valve 14 controls it to flow into the waste liquid collection chamber 17. During the experiment, the third solenoid valve 14 is closed and the second solenoid valve 13 is opened to control the solution to flow to the detection vessel 15. After the experiment is completed, the second solenoid valve 13 is closed and the third solenoid valve 14 is opened to control it to flow into the waste liquid collection chamber 17.

[0031] In a specific embodiment of the present invention, Figure 1 As shown, the detection vessel 15 is a 10 mm cuvette with a guide rail 18 at the bottom. The detection vessel 15 can be moved on the guide rail 18. The detection vessel 15 contains pure water as a blank sample. A cover is provided on the top of the detection vessel 15. The spectrophotometer 16 is a variable light source.

[0032] like Figure 1 As shown, the control panel 2 includes a storage chip and a microcontroller. The microcontroller is a programmable interrupt controller PIC series, which can be used to calculate and process data. The storage chip is a non-volatile flash memory technology NOR flash chip.

[0033] When adopting the utility model, when simply detecting the activated carbon methylene blue value, the calibration step is first performed, and the calibration step is as follows: aim the light source at the pure water sample, set the absorbance to zero, and set it to 0.1±0.02 for the sample to pass the test, and the sample calculation can be performed. Otherwise, if the absorbance is high, reduce the amount of methylene blue solution added; if the absorbance is low, increase the amount of methylene blue solution added;

[0034] The calculation formula is as follows,

[0035] Where: ρ is the concentration of methylene blue solution, in milligrams per milliliter (mg / mL);

[0036] V——The volume of methylene blue solution consumed by the test sample, in milliliters (mL);

[0037] m——the numerical value of the sample mass, in grams (g);

[0038] E——adsorption capacity;

[0039] After calculation, the E value is output.

[0040] The operating steps of the above-mentioned activated carbon detection device are as follows:

[0041] Step 1: Take a certain amount of activated carbon sample, grind and dry it, place it in the sample opening 7, open the arc baffle 8 to allow the sample to enter the mixing chamber 4, and then close the arc baffle 8;

[0042] Step 2: using a program to control the addition of a certain amount of methylene blue solution from the drug storage tank 3 to the mixing and stirring chamber 4;

[0043] Step 3: When the liquid flow meter 12 detects that the addition of the methylene blue solution is complete, it sends a signal to the control panel 2 and uses the program to control the stirring rod 9 to stir it at a speed of 200 r / min for 30 minutes to achieve adsorption equilibrium.

[0044] Step 4: After the stirring is completed, the first solenoid valve 10 is opened, allowing the liquid that has reached adsorption equilibrium to pass through the filtrate temporary storage chamber 5 and open the automatic baffle 11 to enter the filtration chamber 6. After 5 seconds, the second solenoid valve 13 is opened again to control the appropriate amount of solution to enter the detection vessel, and then the second solenoid valve 13 is closed;

[0045] Step 5: Pull the track 18 to measure the absorbance of the solution, calculate the adsorption value of methylene blue on activated carbon through computer, and give the corresponding result.

[0046] In summary, the use of the present invention significantly improves the efficiency and accuracy of activated carbon adsorption performance evaluation during testing. By accurately measuring the absorbance change at a specific wavelength, the amount of methylene blue adsorbed by the activated carbon can be sensitively reflected, thereby accurately evaluating its adsorption efficiency. The present invention has a fast measurement speed, is economical and feasible, simplifies the operating process, and can relatively simply and efficiently measure the methylene blue characteristic value of the activated carbon, quickly reflecting the adsorption capacity of the activated carbon. By analyzing the value of the methylene blue adsorption by the activated carbon, experimental data can be quickly obtained.

[0047] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed or operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A spectrophotometric detection device for activated carbon, characterized in that: The device includes a shell, a control panel, a medicine storage tank, four groups of mixing modules, an analysis module and a waste liquid collection box. The control panel is located at the upper part of the shell, and a medicine storage tank is provided below the control panel. The medicine storage tank is located on the side of the shell. The four groups of mixing modules are arranged above the shell and connected to the medicine storage tank. The four groups of mixing modules are respectively connected to the analysis module and the waste liquid collection box. The analysis modules are distributed in the central area of ​​the shell, and the waste liquid collection box is located at the bottom of the device.

2. The device for detecting activated carbon by spectrophotometry according to claim 1, characterized in that: The mixing module includes a sampling port, a mixing and stirring chamber, a stirring rod, a filtrate storage chamber and a filtration chamber. The sampling port is arranged at the top of the shell, and a mixing and stirring chamber is arranged below. The mixing and stirring chamber is connected to the medicine storage tank and is provided with a stirring rod inside. The top of the filtrate storage chamber is connected to the mixing and stirring chamber through a first solenoid valve, and the bottom is connected to the filtration chamber through an automatic partition. The filtration chamber is provided with 3-4 layers of double-circle medium-speed filter paper, and the bottom is connected to the analysis module. The analysis module includes four detection vessels and a spectrophotometer. The filtration chamber is connected to the detection vessel through a first solenoid valve, and the spectrophotometer is arranged on one side of the detection vessel.

3. The device for detecting activated carbon by spectrophotometry according to claim 2, characterized in that: The stirring rod of the mixing and stirring chamber is provided with a rotating track.

4. The device for detecting activated carbon by spectrophotometry according to claim 2, wherein: A liquid flow meter is respectively provided between the mixing chamber and the medicine storage tank.

5. The device for detecting activated carbon by spectrophotometry according to claim 2, characterized in that: The sample dispensing port is separated from the mixing and stirring chamber below by a movable arc baffle.

6. The device for detecting activated carbon by spectrophotometry according to claim 2, characterized in that: A second solenoid valve and a third solenoid valve are provided at the bottom of the filtration chamber. The second solenoid valve controls the solution to flow toward the detection vessel, and the third solenoid valve controls the solution to flow into the waste liquid collection chamber.

7. The device for detecting activated carbon by spectrophotometry according to claim 2, characterized in that: The detection vessel is a 10 mm cuvette.

8. The device for detecting activated carbon by spectrophotometry according to claim 2, characterized in that: The detection vessel contains pure water as a blank sample, and a sealing cover is provided on the detection vessel.

9. The device for detecting activated carbon by spectrophotometry according to claim 2, characterized in that: The spectrophotometer is a variable light source.

10. The device for detecting activated carbon by spectrophotometry according to claim 1, characterized in that: The control panel includes a storage chip and a microcontroller. The microcontroller is a programmable interrupt controller PIC series, and the storage chip is a non-volatile flash memory technology NOR flash memory chip.

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