An active carbon bulk density testing device and method

Abstract

The application provides a kind of active carbon bulk density testing device and method, including vibration table assembly, fixed support assembly, limiting support assembly, feed hopper assembly and material receiving capacity bottle, wherein, vibration table assembly includes vibration table body and vibrator, fixed support assembly includes support vertical pole and support cross bar, limiting support assembly includes multiple first limiting rods, multiple second limiting rods and third limiting rod, at least one limiting socket for clamping the mouth end of material receiving capacity bottle is formed between second limiting rod and third limiting rod, feed hopper assembly includes feed hopper, the outlet end of feed hopper is set in opposite to the mouth end of material receiving capacity bottle from top to bottom through the receiving sleeve ring. The bulk density obtained by setting vibrator on vibration table body is closer to the actual engineering use operation value than the bulk density obtained by free falling, at the same time, using material receiving capacity bottle does not need manual reading, reduces human error, thereby improving the accuracy of final measurement result.

Description

Technical Field

[0001] This invention relates to the field of activated carbon technology, and in particular to an activated carbon bulk density testing device and method. Background Technology

[0002] With increasingly stringent environmental protection requirements in my country, the types of air pollutants controlled are expanding, and emission standards are becoming more stringent, making the need for multi-pollutant treatment of industrial flue gas more urgent. Sintering flue gas is a major source of air pollutant emissions from steel enterprises, primarily containing sulfur dioxide, nitrogen oxides, particulate matter, dioxins, heavy metals (lead, arsenic, sulfur, chromium, mercury, etc.), fluorides, and volatile organic compounds. Activated carbon flue gas purification technology can effectively remove SO2 and NO from sintering flue gas. x and H g The integrated joint removal system can remove dust, dioxins and other toxic substances, ultimately achieving deep treatment of flue gas and simultaneously realizing the resource utilization of waste. Therefore, it has gradually become the preferred solution and technology for air pollution control.

[0003] Bulk density is one of the key quality indicators of activated carbon for desulfurization and denitrification, and it provides guidance for judging the weight of activated carbon after stacking. The latest method for testing the bulk density of activated carbon is "GB / T 30202.1-2013 Test Methods for Coal-based Granular Activated Carbon for Desulfurization and Denitrification – Part 1: Bulk Density". The testing principle is as follows: The activated carbon sample is slowly poured into a 1000mL graduated cylinder to the 1000mL mark, and the mass of the activated carbon is measured. The mass of activated carbon per unit volume is the bulk density. The main testing steps are: 1) Sieve the shrunk and dried sample; 2) Slowly pour the sample remaining on the sieve into the graduated cylinder, adding activated carbon particles one by one to the 1000mL mark as it approaches the 1000mL mark; 3) Weigh the sample and calculate the bulk density. Currently, the bulk density is calculated by dividing the mass of the activated carbon sample in the graduated cylinder by the sample volume of 1000mL.

[0004] The main problems with the above testing device and method are: 1) For graduated cylinders, there is an error in human reading; 2) The particulate nature of activated carbon results in a certain amount of packing porosity, so the repeatability of graduated cylinder testing is poor when there is no oscillation treatment.

[0005] Furthermore, Chinese patents CN108254291A ("A Coal-based Granular Activated Carbon Packing Density Tester and Its Usage Method"), CN208043591U ("An Activated Carbon Packing Density Test Device"), and CN209102557U ("A Coal-based Granular Activated Carbon Packing Density Test Device") all disclose an automatic vibrating feeder combined with a graduated cylinder for bulk density testing. These devices and methods feature simple and reasonable designs, ease of use, and a high degree of automation. However, all of these devices and methods require manual reading of the graduated cylinder, which can lead to errors. Additionally, the simple downward stacking of activated carbon samples deviates significantly from the actual rolling and compaction during use, thus failing to reflect the actual bulk density of the activated carbon during operation.

[0006] Therefore, it is necessary to propose an activated carbon bulk density testing device and method to solve or at least alleviate the above-mentioned defects. Summary of the Invention

[0007] The main objective of this invention is to provide an activated carbon bulk density testing device and method to solve the problem that the measurement of activated carbon bulk density in the prior art has a large error and cannot reflect the actual bulk density of activated carbon in operation.

[0008] To achieve the above objectives, the present invention provides an activated carbon bulk density testing device, comprising a vibration table assembly, a fixed support assembly, a limiting bracket assembly, a feeding hopper assembly, and a volumetric flask; the fixed support assembly and the limiting bracket assembly are both fixed to the top of the vibration table assembly, the feeding hopper assembly is disposed on the fixed support assembly, and the volumetric flask is placed on the top of the vibration table assembly; wherein,

[0009] The vibration table assembly includes a vibration table body and a vibrator for vibrating the vibration table body; wherein, the vibration table body includes an electronic control device and a weighing device disposed within the vibration table body, and a display device disposed on a side plate of the vibration table body, and the weighing device and the display device are both electrically connected to the electronic control device.

[0010] The fixed support assembly includes a vertical support rod and a horizontal support rod; wherein, the vertical support rod protrudes from the top of the vibrating table body and extends vertically to a first preset height; the horizontal support rod is arranged perpendicular to the vertical support rod, and the horizontal support rod includes a fixed end and a free end arranged opposite to each other, the fixed end is connected to the top of the vertical support rod, the free end is suspended from the fixed end toward the material holding capacity bottle, and a receiving collar for placing the feeding hopper assembly is fixed on the free end;

[0011] The limiting bracket assembly includes multiple first limiting rods, multiple second limiting rods, and a third limiting rod arranged vertically. The first limiting rod protrudes from the top of the vibration table body and extends vertically to a second preset height, which is less than the first preset height and matches the height of the material-bearing capacity bottle. Multiple second limiting rods are fixed to the top of the first limiting rod and spaced apart along a first direction. Multiple third limiting rods are fixed to the top of the first limiting rod and spaced apart along a second direction. At least one limiting slot is formed between the second and third limiting rods to lock the bottle mouth end of the material-bearing capacity bottle.

[0012] The feeding hopper assembly includes a feeding hopper, the outlet end of which passes through the receiving sleeve from top to bottom and is positioned directly opposite the bottle mouth of the material holding capacity bottle.

[0013] Preferably, the feeding hopper assembly further includes a solenoid valve fixed to the outlet end of the feeding hopper, the supporting horizontal rod and the supporting vertical rod are hollow inside, the supporting vertical rod is connected to the interior of the supporting horizontal rod, the free end of the supporting horizontal rod has a first wire hole for a wire to pass through, the bottom of the supporting vertical rod has a second wire hole connecting to the interior of the vibration table body, and the solenoid valve is electrically connected to the electronic control device through a wire passing through the first wire hole, the supporting horizontal rod, the supporting vertical rod and the second wire hole in sequence.

[0014] Preferably, the vibrating table body is rectangular, and multiple second limiting rods are arranged at intervals along the length direction of the vibrating table body, and multiple third limiting rods are arranged at intervals along the width direction of the vibrating table body; the third limiting rods are fixed to the top of the second limiting rods, and the limiting slot is rectangular and the diameter of the limiting slot matches the outer diameter of the bottle mouth of the material holding capacity bottle.

[0015] Preferably, the outer surfaces of both the second limiting rod and the third limiting rod are wrapped with flexible rope.

[0016] Preferably, the holding capacity bottle is a straight-mouth conical bottle, and the distance between the discharge port of the feeding hopper and the mouth of the straight-mouth conical bottle is set between 10mm and 50mm.

[0017] Preferably, the vibration table body further includes a mechanical switch, which is disposed on the side wall of the vibration table body and is electrically connected to the electronic control device.

[0018] Preferably, the amplitude range of the vibrator is set between 0 mm and 5 mm.

[0019] The present invention also provides a method for testing the bulk density of activated carbon, applied to the activated carbon bulk density testing device described above, comprising the following steps:

[0020] S1, add activated carbon sample to the known volumetric flask according to the first feeding rate;

[0021] S2, when the activated carbon sample in the volumetric flask is level with the mouth of the flask, stop adding activated carbon sample to the volumetric flask;

[0022] S3, start the vibration table assembly to vibrate at a preset vibration frequency, and shut down the vibration table assembly at the first time node when the first time period after starting the vibration table assembly ends.

[0023] S4, continue adding activated carbon sample to the volumetric flask at the second feeding rate; wherein the second feeding rate is less than the first feeding rate;

[0024] S5, when the activated carbon sample in the volumetric flask is level with the mouth of the flask, stop adding activated carbon sample to the volumetric flask;

[0025] S6. The bulk density value of the activated carbon sample is calculated based on the volume of the volumetric flask and the current weight of the volumetric flask obtained by the vibration table assembly.

[0026] Preferably, step S1 includes the following steps:

[0027] S11, the volume of activated carbon in the volumetric flask reaches the first height of the volumetric flask.

[0028] Beforehand, the first feeding speed is controlled to be set to a first preset speed;

[0029] S12, when the volume of activated carbon in the volumetric flask reaches the region between the first height of the volumetric flask and the mouth of the flask, the first feeding speed is controlled to be a second preset speed; wherein the second preset speed is less than the first preset speed.

[0030] Preferably, step S1 includes the following steps:

[0031] S13, when the weight of the material-bearing capacity bottle obtained by the vibration table assembly is less than a first preset value, the first feeding speed is controlled to be a third preset speed;

[0032] S14, when the weight of the material-bearing capacity bottle obtained by the vibration table assembly is greater than or equal to the first preset value and less than the second preset value, the first feeding speed is controlled to be a fourth preset speed; wherein, the fourth preset speed is less than the third preset speed;

[0033] S15, when the weight of the material-bearing capacity bottle obtained by the vibration table assembly is greater than or equal to the second preset value, the feeding speed is controlled to the fifth preset speed until the activated carbon sample in the material-bearing capacity bottle is flush with the bottle mouth.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] This invention provides an activated carbon bulk density testing device and method, including a vibration table assembly, a fixed support assembly, a limiting bracket assembly, a feeding hopper assembly, and a volumetric flask. The vibration table assembly includes a vibration table body and a vibrator. The fixed support assembly includes a supporting vertical rod and a supporting horizontal rod. The limiting bracket assembly includes multiple vertically arranged first limiting rods, multiple second limiting rods, and a third limiting rod. At least one limiting notch for locking the mouth of the volumetric flask is formed between the second and third limiting rods. The feeding hopper assembly includes a feeding hopper, with its outlet end extending from top to bottom through a receiving collar and directly facing the mouth of the volumetric flask. The bulk density obtained by mounting the vibrator on the vibration table body is closer to the actual operating value than that obtained by free fall. Using a volumetric flask eliminates the need for manual reading, reducing human error and improving the accuracy of the final measurement results. The limiting rods ensure that the volumetric flask does not deviate during vibration, guaranteeing that the mouth of the volumetric flask matches the outlet of the feeding hopper. This device is highly automated and can automatically weigh and calculate. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present invention;

[0038] Figure 2 This is a flowchart illustrating one embodiment of the present invention.

[0039] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0040] Explanation of icon numbers:

[0041] 10. Vibration table assembly; 110. Vibration table body; 120. Mechanical switch; 20. Fixed support assembly; 210. Support vertical rod; 220. Support horizontal rod; 221. Receiving collar; 30. Limiting bracket assembly; 310. First limiting rod; 320. Second limiting rod; 330. Third limiting rod; 340. Limiting bayonet; 40. Feed hopper assembly; 410. Feed hopper; 50. Material holding capacity bottle. Detailed Implementation

[0042] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0045] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0046] Firstly, please refer to the appendix. Figure 1An embodiment of the present invention provides a sintering machine activated carbon bulk density testing device, comprising a vibration table assembly 10, a fixed support assembly 20, a limiting bracket assembly 30, a feed hopper assembly 40, and a volumetric flask 50. The fixed support assembly 20 and the limiting bracket assembly 30 are both fixed to the top of the vibration table assembly 10. The feed hopper assembly 40 is disposed on the fixed support assembly 20, and the volumetric flask 50 is placed on top of the vibration table assembly 10. It should be noted that the vibration table assembly 10 is used to place the volumetric flask 50 and also serves as the vibration source for the entire device. The fixed support assembly 20 is used to fix and support the feed hopper assembly 40, and the limiting bracket assembly 30 is used to restrict the volumetric flask 50, preventing it from moving, tipping over, or deviating during vibration of the vibration table assembly 10.

[0047] The vibration table assembly 10 includes a vibration table body 110 and a vibrator (not shown) for vibrating the vibration table body 110; wherein, the vibration table body 110 includes an electronic control device (not shown) and a weighing device (not shown) disposed within the vibration table body 110, and a display device (not shown) disposed on the side plate of the vibration table body 110, and the weighing device and the display device are both electrically connected to the electronic control device. Those skilled in the art should understand that, unlike the prior art where activated carbon samples are directly poured into a measuring cylinder without vibration or where the vibrator is placed on a feeding device above a vibration table, the vibrator in this application is placed on the vibration table body 110. Through the vibration of the vibrator, the vibration table body 110 can be driven to vibrate accordingly, thus more closely resembling the real-time tumbling of activated carbon samples during actual engineering use. This vibration method allows the activated carbon samples to tumble fully within the receiving volumetric bottle 50, resulting in a denser activated carbon sample. This avoids the defects of the traditional top-down feeding method, which leads to large errors in the final measurement results due to the accumulation pores between activated carbon samples.

[0048] Furthermore, since the fixed support assembly 20 is fixed to the vibration table body 110, the fixed support assembly 20 can be driven to vibrate synchronously after the vibrator is started. Because the feed hopper assembly 40 is connected to the fixed support assembly 20, the activated carbon sample in the feed hopper assembly 40 can be loosened, making the feeding smoother. Additionally, it should be noted that the vibration direction of the vibrator can be set according to actual needs; it can be horizontal, vertical, or a combination of multiple directions. This setting allows the feeding method to more closely resemble the actual use of activated carbon samples in engineering, thus obtaining more accurate results. This application has a high degree of automation. Based on the acquired weight data and the volume of the volumetric flask 50 (which can be known in advance), the bulk density of the activated carbon sample is automatically calculated. These data can be displayed on a display device, such as a built-in LED display screen, eliminating the need for manual reading and reducing the errors caused by manually reading the graduated cylinder scale in existing technologies.

[0049] It is also worth noting for those skilled in the art that the vibration table body 110 in this application also includes an electronic control device, a weighing device, and a display device. The weighing device and the display device are electrically connected to the electronic control device, which includes a controller with calculation functions. It should be noted that this vibration table body 110 is an existing device in the art, and those skilled in the art can select it according to actual needs, which will not be elaborated here. In the process of using the vibration table assembly 10 in this application, in order to avoid the problem of inaccurate data caused by the vibration table body 110 vibrating while reading, this application adopts the method of turning off the vibrator after vibration is completed before reading the data in actual use, thereby ensuring the accuracy of the reading.

[0050] The fixed support assembly 20 includes a vertical support rod 210 and a horizontal support rod 220. The vertical support rod 210 protrudes from the top of the vibration table body 110 and extends vertically to a first preset height. The horizontal support rod 220 is perpendicular to the vertical support rod 210 and includes a fixed end (not shown) and a free end (not shown) opposite to each other. The fixed end is connected to the top of the vertical support rod 210, and the free end cantilevered from the fixed end toward the material-carrying capacity bottle 50. A receiving collar 221 for placing the feeding hopper assembly 40 is fixed on the free end. It is understood that the first preset height of the vertical support rod 210 can be set according to technical needs, but it is necessary to ensure that the feeding hopper assembly 40 is positioned above the material-carrying capacity bottle 50. In other embodiments, the vertical support rod 210 and the horizontal support rod 220 can also be configured as telescopic rods or other adjustable length methods to adapt to a wider range of application scenarios. In addition, this application has a receiving sleeve 221 fixed at the free end for placing the feed hopper assembly 40. During use, the staff can place the feed hopper assembly 40 on the receiving sleeve 221 or remove it from the receiving sleeve 221 as needed, which is convenient to use.

[0051] The limiting bracket assembly 30 includes multiple first limiting rods 310, multiple second limiting rods 320, and a third limiting rod 330 arranged vertically. The first limiting rods 310 protrude from the top of the vibration table body 110 and extend vertically to a second preset height, which is less than the first preset height and matches the height of the material-bearing capacity bottle 50. Multiple second limiting rods 320 are fixed to the top of the first limiting rods 310 and spaced apart along a first direction. Multiple third limiting rods 330 are fixed to the top of the first limiting rods 310 and spaced apart along a second direction. At least one limiting slot 340 for locking the bottle mouth end of the material-bearing capacity bottle 50 is formed between the second limiting rods 320 and the third limiting rods 330. It should be noted that the first limiting rod 310 provides the height of the entire limiting support assembly 30. Since the second limiting rod 320 and the third limiting rod 330 are located above the first limiting rod 310 and are used to limit the mouth end of the volumetric flask 50 to prevent the volumetric flask 50 from deviating and causing the activated carbon sample to not fall accurately into the volumetric flask 50, the second preset height needs to be less than the first preset height. Furthermore, those skilled in the art should understand that the number and arrangement direction of the second limiting rod 320 and the third limiting rod 330 can be selected according to actual needs, as long as at least one limiting slot 340 for locking the mouth end of the volumetric flask 50 is formed between the second limiting rod 320 and the third limiting rod 330. This limiting slot 340 needs to match the mouth end of the volumetric flask 50. Of course, in other embodiments, the size and shape of the limiting slot 340 can also be set to match the body of the volumetric flask 50. Furthermore, the first limiting rod 310, the second limiting rod 320, and the third limiting rod 330 can be detachably connected or non-detachably connected. In a preferred embodiment, the first limiting rod 310, the second limiting rod 320, and the third limiting rod 330 are detachably connected, and the first limiting rod 310 is detachably connected to the vibration table body 110.

[0052] The feeding hopper assembly 40 includes a feeding hopper 410, the outlet end of which passes through the receiving ring 221 from top to bottom and is positioned directly opposite the mouth of the holding volumetric bottle 50. It is worth noting that the distance between the outlet end of the feeding hopper 410 and the mouth of the holding volumetric bottle 50 is set to 10mm to 50mm, preferably 20mm to 30mm, to ensure the accuracy and smoothness of feeding. Preferably, the inner diameter of the feeding inlet of the feeding hopper 410 is greater than or equal to 50mm; the inner diameter of the discharging outlet is greater than or equal to 30mm.

[0053] In a preferred embodiment, the feed hopper assembly 40 further includes a solenoid valve fixed to the outlet end of the feed hopper 410. The support crossbar 220 and the support vertical bar 210 are hollow inside. The support vertical bar 210 communicates with the interior of the support crossbar 220. The free end of the support crossbar 220 has a first wire hole (not shown) for a wire to pass through. The bottom of the support vertical bar 210 has a second wire hole (not shown) communicating with the interior of the vibration table body 110. The solenoid valve is electrically connected to the electronic control device by a wire passing through the first wire hole, the support crossbar 220, the support vertical bar 210, and the second wire hole in sequence.

[0054] In this embodiment, an electromagnetic valve (not shown) is installed at the outlet end of the discharge hopper. The electromagnetic valve is electrically connected to the electronic control device. By controlling the opening degree of the electromagnetic valve, the amount and speed of feeding are controlled, thereby achieving automated control of the feeding amount. Furthermore, those skilled in the art can also control the opening degree of the electromagnetic valve in conjunction with factors such as the required feeding speed and the weight of the material-bearing capacity bottle 50 obtained by the vibration table assembly 10, to achieve more intelligent control. In addition, it should be noted that, in order to improve the compactness of the structure of this application and prevent the wiring of the electromagnetic valve from interfering with the entire measurement process, the supporting horizontal rod 220 and the supporting vertical rod 210 are made hollow inside, and the interiors of the supporting vertical rod 210 and the supporting horizontal rod 220 are connected. At the same time, by opening the first wire hole and the second wire hole, a complete wire through channel can be formed. In this way, the wire can be laid in the channel, achieving a compact overall structure and effectively avoiding interference from the wire.

[0055] In a preferred embodiment, the vibration table body 110 is rectangular, with multiple second limiting rods 320 spaced apart along the length of the vibration table body 110, and multiple third limiting rods 330 spaced apart along the width of the vibration table body 110. The third limiting rods 330 are fixed to the top of the second limiting rods 320, and the limiting slot 340 is rectangular with its diameter matching the outer diameter of the bottle mouth of the material-carrying volumetric bottle 50. Those skilled in the art should understand that the vibration table body 110 can be rectangular or other shapes. The vibration table body 110, as a common device in the art, can be obtained according to actual needs. The arrangement direction of the multiple second limiting rods 320 and the third limiting rods 330 can also be set according to actual needs, as long as the second limiting rods 320 and the third limiting rods 330 can limit the material-carrying volumetric bottle 50.

[0056] Furthermore, the outer surfaces of both the second limiting rod 320 and the third limiting rod 330 are wrapped with flexible rope. By using flexible rope, such as flexible rope made of rubber, hemp rope, plastic rope, or cloth, the impact of the second limiting rod 320 and the third limiting rod 330 on the volumetric bottle 50 during vibration can be reduced, thereby extending the service life of the volumetric bottle 50.

[0057] Furthermore, the volumetric flask 50 is a straight-mouthed conical flask, and the distance between the outlet of the feed hopper 410 and the mouth of the straight-mouthed conical flask is set between 10mm and 50mm. Setting the volumetric flask 50 as a straight-mouthed conical flask, with its wider bottom and narrower top, allows the activated carbon sample to be fully tumbled and compacted within the flask, thereby improving the accuracy of the final measurement results. Moreover, the straight-mouthed conical flask is a standard component and readily available in practice. In other embodiments, the type of the volumetric flask 50 and the distance between the feed hopper 410 and the mouth of the straight-mouthed conical flask can be set according to actual needs. For example, as a preferred embodiment, the weighing capacity of the straight-mouthed conical flask can be 500ml, 1000ml, or 2000ml, with 1000ml being preferred for ease of calculation and verification.

[0058] In a preferred embodiment, the vibration table body 110 further includes a mechanical switch 120, which is disposed on the side wall of the vibration table body 110 and is electrically connected to the electronic control device. The mechanical switch 120 facilitates operation by the operator. It is understood that in other embodiments, the position of the mechanical switch 120 can be adapted to meet specific needs.

[0059] Secondly, please participate in the attached... Figure 2 The present invention also provides a method for testing the bulk density of activated carbon, applied to the activated carbon bulk density testing device described above, comprising the following steps:

[0060] S1, add activated carbon sample to the volumetric flask 50 of known volume according to the first feeding rate. The volume of the volumetric flask 50 can be obtained in advance through various measurement methods. For example, a skilled technician can fill the volumetric flask 50 with deionized or distilled water, weigh the water to obtain its mass, and then divide it by the density of the solution to obtain the volume of the volumetric flask 50, accurate to 1 ml. This provides a highly accurate volume of the volumetric flask 50. Furthermore, the first feeding rate should be matched to the volume of the volumetric flask 50 and the operational requirements. The first feeding rate can be constant or variable, depending on the actual needs.

[0061] S2, when the activated carbon sample in the volumetric flask 50 is level with the flask opening, stop adding activated carbon sample to the volumetric flask 50. It is worth noting that existing methods for measuring the bulk density of activated carbon generally use a graduated cylinder to obtain the volume of the activated carbon sample. This method is prone to errors due to factors such as viewing angle during reading, leading to inaccurate measurement results. This application obtains the volume of the activated carbon sample when it is level with the flask opening. Since the volume of the volumetric flask 50 is known beforehand through relevant measurement methods, this method allows for the determination of the activated carbon sample volume simply by ensuring the sample is level with the flask opening. This method avoids the reading errors inherent in graduated cylinders, thereby improving the accuracy of the final measurement results.

[0062] S3, the vibration table assembly 10 is started to vibrate at a preset vibration frequency, and the vibration table assembly 10 is turned off at a first time point after the first time duration following its start. It is worth noting for those skilled in the art that the vibration frequency and amplitude of the vibration table assembly 10 can be set according to actual needs. The vibration direction can be horizontal, vertical, or multiple directions, all of which can cause the activated carbon sample to tumble to a certain extent in the volumetric flask 50, closely resembling the actual situation of the activated carbon sample in actual use, thereby improving the final measurement results. Furthermore, it should be noted that the first time duration can be set according to actual needs, for example, it can be 5 seconds. After 5 seconds, the vibration table assembly 10 is turned off to stop vibration, facilitating the next feeding. In addition, the amplitude of the vibration table assembly 10 can be set within the range of 0mm to 5mm, and the vibration time is adjustable; all these data can be displayed on the display device.

[0063] S4, continue adding activated carbon sample to the volumetric flask 50 at a second feeding rate, wherein the second feeding rate is less than the first feeding rate. It is understood that, due to the presence of packing pores during the accumulation process, the activated carbon sample will collapse to a certain extent after the initial vibration. Although the collapse space is small, a certain degree of collapse will occur. At this point, activated carbon sample is added again to the volumetric flask 50 at the second feeding rate until it is full. This results in activated carbon sample with higher density and a volume equal to the volume of the volumetric flask 50, thereby obtaining more accurate test data. Furthermore, it should be noted that since the space and amount of the second feeding are relatively small, the second feeding rate is controlled to be less than the first feeding rate to achieve the purpose of refined feeding. Of course, those skilled in the art can also set the second feeding rate to be equal to the first feeding rate or to other speeds according to actual needs.

[0064] S5, when the activated carbon sample in the volumetric flask 50 is level with the mouth of the flask, stop adding activated carbon sample to the volumetric flask 50.

[0065] S6. The bulk density value of the activated carbon sample is calculated based on the volume of the volumetric flask 50 and the current weight of the volumetric flask 50 obtained from the vibration table assembly 10. The vibration table assembly 10 has an internal electronic control device that can automatically weigh the activated carbon in the volumetric flask 50 placed on top of the vibration table assembly 10, and automatically calculate the bulk density value based on the volume of the volumetric flask 50.

[0066] In a preferred embodiment, step S1 includes the following steps:

[0067] S11, before the volume of activated carbon in the material-bearing capacity bottle 50 reaches the first height of the material-bearing capacity bottle 50, the first feeding speed is controlled to be set to a first preset speed.

[0068] S12, when the volume of activated carbon in the material-bearing capacity bottle 50 reaches the area between the first height of the material-bearing capacity bottle 50 and the bottle mouth, the first feeding speed is controlled to be a second preset speed; wherein, the second preset speed is less than the first preset speed.

[0069] It is worth noting that, in this embodiment, to further achieve refined control and improve the accuracy of activated carbon bulk density measurement results, before the volume of activated carbon in the volumetric flask 50 reaches the first height of the volumetric flask 50, the first feeding speed is controlled to a first preset speed. When the volume of activated carbon in the volumetric flask 50 reaches the area between the first height of the volumetric flask 50 and the flask opening, the first feeding speed is controlled to a second preset speed, and the second preset speed is less than the first preset speed. Through this non-linear speed control method, a denser activated carbon sample can be obtained, thereby obtaining more accurate test results. For example, the first height can be set to 2 / 3 of the volumetric flask 50, that is, the activated carbon sample is in most of the bottom space, using a rapid feeding method followed by a slow feeding method, thereby achieving the purpose of precise control.

[0070] In a preferred embodiment, step S1 includes the following steps:

[0071] S13, when the weight of the material-bearing capacity bottle 50 obtained by the vibration table assembly 10 is less than the first preset value, the first feeding speed is controlled to be the third preset speed.

[0072] S14, when the weight of the material-bearing capacity bottle 50 obtained by the vibration table assembly 10 is greater than or equal to the first preset value and less than the second preset value, the first feeding speed is controlled to be a fourth preset speed; wherein, the fourth preset speed is less than the third preset speed;

[0073] S15, when the weight of the material-bearing capacity bottle 50 obtained by the vibration table assembly 10 is greater than or equal to the second preset value, the feeding speed is controlled to the fifth preset speed until the activated carbon sample in the material-bearing capacity bottle 50 is flush with the bottle mouth.

[0074] It is worth noting to those skilled in the art that in this embodiment, by acquiring the weight of the volumetric flask 50 obtained by the vibration table assembly 10 in real time, different feeding speed strategies are adopted according to different weights. When the weight does not exceed the first preset value, a fast feeding method is adopted, and then the feeding speed is gradually reduced. By adopting such a feeding method, a denser activated carbon sample can be obtained, thereby obtaining more accurate test results.

[0075] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. An activated carbon bulk density testing device, characterized in that, The system includes a vibration table assembly, a fixed support assembly, a limiting bracket assembly, a feeding hopper assembly, and a volumetric flask. The fixed support assembly and the limiting bracket assembly are both fixed to the top of the vibration table assembly. The feeding hopper assembly is mounted on the fixed support assembly, and the volumetric flask is placed on top of the vibration table assembly. The vibration table assembly includes a vibration table body and a vibrator for vibrating the vibration table body; wherein, the vibration table body includes an electronic control device and a weighing device disposed within the vibration table body, and a display device disposed on a side plate of the vibration table body, and the weighing device and the display device are both electrically connected to the electronic control device. The fixed support assembly includes a vertical support rod and a horizontal support rod; wherein, the vertical support rod protrudes from the top of the vibrating table body and extends vertically to a first preset height; the horizontal support rod is arranged perpendicular to the vertical support rod, and the horizontal support rod includes a fixed end and a free end arranged opposite to each other, the fixed end is connected to the top of the vertical support rod, the free end is suspended from the fixed end toward the material holding capacity bottle, and a receiving collar for placing the feeding hopper assembly is fixed on the free end; The limiting bracket assembly includes multiple first limiting rods, multiple second limiting rods, and a third limiting rod arranged vertically. The first limiting rod protrudes from the top of the vibration table body and extends vertically to a second preset height, which is less than the first preset height and matches the height of the material-bearing capacity bottle. Multiple second limiting rods are fixed to the top of the first limiting rod and spaced apart along a first direction. Multiple third limiting rods are fixed to the top of the first limiting rod and spaced apart along a second direction. At least one limiting slot is formed between the second and third limiting rods to lock the bottle mouth end of the material-bearing capacity bottle. The feeding hopper assembly includes a feeding hopper, and the outlet end of the feeding hopper is arranged from top to bottom through the receiving sleeve and directly opposite the bottle mouth end of the receiving capacity bottle; The feeding hopper assembly also includes a solenoid valve fixed to the outlet end of the feeding hopper. The supporting horizontal rod and the supporting vertical rod are hollow inside. The supporting vertical rod is connected to the interior of the supporting horizontal rod. The free end of the supporting horizontal rod has a first wire hole for a wire to pass through. The bottom of the supporting vertical rod has a second wire hole that connects to the interior of the vibration table body. The solenoid valve is electrically connected to the electronic control device through a wire passing through the first wire hole, the supporting horizontal rod, the supporting vertical rod, and the second wire hole in sequence.

2. The activated carbon bulk density testing device according to claim 1, characterized in that, The vibrating table body is rectangular, with multiple second limiting rods spaced apart along the length of the vibrating table body, and multiple third limiting rods spaced apart along the width of the vibrating table body; the third limiting rods are fixed to the top of the second limiting rods, and the limiting slot is rectangular and the diameter of the limiting slot matches the outer diameter of the bottle mouth of the material-carrying capacity bottle.

3. The activated carbon bulk density testing device according to claim 2, characterized in that, The outer surfaces of both the second and third limiting rods are wrapped with flexible rope.

4. The activated carbon bulk density testing device according to claim 1, characterized in that, The holding capacity bottle is a straight-mouth conical bottle, and the distance between the discharge port of the feeding hopper and the mouth of the straight-mouth conical bottle is set between 10mm and 50mm.

5. The activated carbon bulk density testing device according to claim 1, characterized in that, The vibration table body also includes a mechanical switch, which is located on the side wall of the vibration table body and is electrically connected to the electronic control device.

6. The activated carbon bulk density testing device according to claim 1, characterized in that, The amplitude range of the vibrator is set to be between 0mm and 5mm.

7. A method for testing the bulk density of activated carbon, characterized in that, The activated carbon bulk density testing device as described in any one of claims 1-6 includes the following steps: S1, add activated carbon sample to the known volumetric flask according to the first feeding rate; S2, when the activated carbon sample in the volumetric flask is level with the mouth of the flask, stop adding activated carbon sample to the volumetric flask; S3, start the vibration table assembly to vibrate at a preset vibration frequency, and shut down the vibration table assembly at the first time node when the first time period after starting the vibration table assembly ends. S4, continue adding activated carbon sample to the volumetric flask at the second feeding rate; wherein the second feeding rate is less than the first feeding rate; S5, when the activated carbon sample in the volumetric flask is level with the mouth of the flask, stop adding activated carbon sample to the volumetric flask; S6. The bulk density value of the activated carbon sample is calculated based on the volume of the volumetric flask and the current weight of the volumetric flask obtained by the vibration table assembly.

8. The method for testing the bulk density of activated carbon according to claim 7, characterized in that, Step S1 includes the following steps: S11, before the volume of activated carbon in the volumetric flask reaches the first height of the volumetric flask, the first feeding speed is controlled to be set to a first preset speed. S12, when the volume of activated carbon in the volumetric flask reaches the region between the first height of the volumetric flask and the mouth of the flask, the first feeding speed is controlled to be a second preset speed; wherein the second preset speed is less than the first preset speed.

9. The method for testing the bulk density of activated carbon according to claim 7, characterized in that, Step S1 includes the following steps: S13, when the weight of the material-bearing capacity bottle obtained by the vibration table assembly is less than a first preset value, the first feeding speed is controlled to be a third preset speed; S14, when the weight of the material-bearing capacity bottle obtained by the vibration table assembly is greater than or equal to the first preset value and less than the second preset value, the first feeding speed is controlled to be a fourth preset speed; wherein, the fourth preset speed is less than the third preset speed; S15, when the weight of the material-bearing capacity bottle obtained by the vibration table assembly is greater than or equal to the second preset value, the first feeding speed is controlled to the fifth preset speed until the activated carbon sample in the material-bearing capacity bottle is flush with the bottle mouth.

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