Coating device for preparing ultrahigh-strength activated carbon for experiment

Abstract

The invention relates to a coating device for preparing ultrahigh-strength activated carbon for an experiment. The coating device comprises a mixing reaction kettle, a drying reaction kettle, an exhaust pipeline and an annular auxiliary heating piece, a feeding hole is formed in the top of a kettle body of the drying reaction kettle; a drying hot air inlet is formed in one side of a kettle body of the drying reaction kettle, and a drying hot air blower is arranged at the drying hot air inlet; a hot air outlet is formed in the other side of the kettle body of the drying reaction kettle, and an exhaust pipeline is connected with the hot air outlet; the annular auxiliary heating piece is arranged on a kettle body of the mixing reaction kettle in a sleeving manner, so that the inner wall of the annular auxiliary heating piece is attached to the kettle body of the mixing reaction kettle; an auxiliary heating air inlet of the annular auxiliary heating piece is connected with an exhaust pipeline and receives hot air exhausted from the hot air exhaust outlet. The drying hot air is recycled, energy waste is reduced, the heating efficiency and uniformity are improved through the annular auxiliary heating piece, and the whole equipment is more suitable for being used in a laboratory.

Description

Technical Field

[0001] The invention relates to the technical field of activated carbon coating devices, and in particular to a coating device prepared by ultra-high strength activated carbon for experiments. Background Art

[0002] In the preparation process of activated carbon, especially the preparation of ultra-high strength activated carbon, it needs to be coated, and this process involves multiple steps such as mixing and drying. Traditional coating devices usually carry out the mixing and drying processes in separate equipment, and these equipment are often equipped with independent heating or drying systems, which leads to energy waste and large equipment footprint. At the same time, in traditional devices, the hot air discharged from the drying process is usually directly discharged to the outside world without being effectively utilized, resulting in inefficient use of energy. Moreover, during the mixing process, there are certain limitations in the heating method of the mixing reactor, such as uneven heating, low heating efficiency, or difficulty in accurately controlling the temperature. In addition, traditional devices also lack effective measures in heat transfer and insulation, resulting in high cost and low efficiency of the entire preparation process. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the present invention is to provide a coating device for preparing ultra-high strength activated carbon for experimental use.

[0005] (II) Technical solution

[0006] In order to solve the above problems, the present invention provides a coating device for preparing ultra-high strength activated carbon for experiment, comprising a mixing reactor and a drying reactor; an exhaust duct and an annular auxiliary heating element;

[0007] A feeding port is provided on the top of the drying reactor; a drying hot air inlet is provided on one side of the drying reactor, and a drying hot air blower is provided at the drying hot air inlet; a hot air exhaust port is provided on the other side of the drying reactor, and an exhaust duct is connected to the hot air exhaust port;

[0008] The annular auxiliary heating element is sleeved on the kettle body of the mixing reactor so that the inner wall of the annular auxiliary heating element fits the kettle body of the mixing reactor; the auxiliary heat air inlet of the annular auxiliary heating element is connected to the exhaust duct to receive the hot air discharged from the hot air exhaust port.

[0009] Wherein, the annular auxiliary heating component includes an outer shell and an air heating line pipe; the air heating line pipe is spirally installed in the outer shell, the auxiliary heating air inlet of the air heating line pipe is located at the bottom, and the auxiliary heating air outlet of the air heating line pipe is located at the top.

[0010] Among them, one or more of glass fiber wool, ceramic fiber felt or rock wool is filled between the shell and the wind heating line pipe.

[0011] Wherein, the annular auxiliary heating element also includes an inner shell and a heat sink; the heat sink is inserted into the spiral gap of the air heating line pipe, the heat sink is fixedly connected to the inner shell, and the inner shell fits the kettle body of the mixing reactor.

[0012] Wherein, a temperature regulating port is provided on the exhaust duct, and a sealing cover is provided on the temperature regulating port, and the sealing cover is threadedly connected to the temperature regulating port.

[0013] Wherein, a heating device is arranged at the bottom of the mixing reactor, and the heating device is an oil bath heating device or an electric heating jacket device.

[0014] Wherein, a drain pipe is arranged at the bottom of the mixing reactor, and a drain valve is installed on the drain pipe.

[0015] Wherein, the mixing reactor is selected from one of a stainless steel reactor, a glass-lined reactor or a glass reactor.

[0016] Wherein, it also includes an extension pipe; the extension pipe is connected to the auxiliary heat outlet of the air heating line pipe.

[0017] (III) Beneficial effects

[0018] The above technical solution of the present invention has the following advantages: it realizes the recycling of drying hot air, reduces energy waste, the annular auxiliary heating element improves heating efficiency and uniformity, and the whole equipment is more suitable for laboratory use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings of the present invention are provided for illustrative purposes only, and the proportions and quantities of the components in the drawings may not necessarily be consistent with the actual products.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a cross-sectional schematic diagram of the annular auxiliary heating element of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-2 As shown, an embodiment of the present invention provides a coating device for preparing ultra-high strength activated carbon for experiment, comprising a drying reactor 1 and a mixing reactor 2.

[0024] The drying reactor 1 provides space for the drying step in the activated carbon coating process. The first purpose is to pre-treat the activated carbon by drying the activated carbon at an appropriate temperature for several hours to remove moisture and other volatile impurities adsorbed on its surface. This can ensure that the surface of the activated carbon is in a relatively pure state, which is conducive to the combination of PVA and activated carbon in the subsequent coating process. The second purpose is to dry the product after being treated in the mixing reactor here to remove moisture or other volatile components in the product, so that the activated carbon reaches the required degree of dryness and ensure the performance of the final product.

[0025] The mixing reactor 2 is a place for mixing raw materials and preliminary reaction. The first purpose is to configure the PVA solution and provide a space for heating and mixing. The second purpose is to mix and evaporate the activated carbon and PVA solution. The mixing reactor is selected from a stainless steel reactor, a glass-lined reactor or a glass reactor.

[0026] The stainless steel reactor has good corrosion resistance, can withstand the erosion of PVA solution and other substances that may participate in the reaction, and has a long service life; it has excellent mechanical properties, high strength, can withstand a certain pressure and temperature, and can adapt to a variety of reaction conditions; it is easy to clean and maintain, has a smooth surface, is not easy to leave residual materials, and can effectively avoid cross contamination.

[0027] The glass-lined reactor has excellent corrosion resistance and can resist the erosion of various chemical substances such as acid, alkali, and salt. It has strong adaptability to various chemical environments during the PVA solution and activated carbon coating process; the surface is smooth and not easy to hang materials, and the materials can be fully mixed and reacted in the reactor, which is beneficial to improve the coating effect; it has good insulation properties and can avoid safety hazards caused by static electricity and other problems.

[0028] The glass reactor has high transparency, which makes it easy to directly observe the state of the materials, color changes and progress of the reaction during the reaction, which is conducive to real-time monitoring of the reaction process and timely adjustment of the reaction conditions; it has good chemical stability and will not react chemically with PVA solution and activated carbon, thus ensuring the purity and accuracy of the reaction.

[0029] Those skilled in the art can select a reactor made of any of the above materials as the mixing reactor of the present invention according to actual needs.

[0030] A heating device 3 is arranged at the bottom of the mixing reactor 2, and the heating device 3 is an oil bath heating device or an electric heating sleeve device. The principle of the electric heating sleeve device is to wind a resistance wire around the bottom of the mixing reactor, and to generate heat by electrifying the resistance wire to heat the reactor. The oil bath heating device is to load heat-conducting oil into an oil bath pot, and the heat-conducting oil can be selected as silicone oil. The bottom of the mixing reactor is immersed in an oil bath. The heat-conducting oil is heated by heating the heating element of the oil bath pot, and the heat-conducting oil then transfers the heat to the mixing reactor. Both the oil bath heating device and the electric heating sleeve device are existing products and belong to the prior art, so their structures are not described in detail, and those skilled in the art can purchase or make corresponding heating devices according to actual conditions.

[0031] A drain pipe 4 is provided at the bottom of the mixing reactor 2, and a drain valve 5 is installed on the drain pipe 4. The drain valve 5 controls the discharge of the liquid in the mixing reactor 2, which is convenient for discharging the liquid in the reactor after the mixing process is completed, and is convenient for subsequent cleaning and maintenance operations, thereby improving the convenience and work efficiency of the device.

[0032] A feeding port 6 is provided on the top of the drying reactor 1, and the feeding port 6 is used to feed activated carbon to be pre-treated or activated carbon that has been coated and is to be dried.

[0033] A dry hot air inlet is provided on one side of the body of the drying reactor 1, and a dry hot air blower 7 is provided at the dry hot air inlet. The dry hot air blown by the dry hot air blower 7 dries the material in the drying reactor 1. A hot air exhaust port is provided on the other side of the body of the drying reactor 1, and an exhaust duct 8 is connected to the hot air exhaust port. After the dry hot air passes through the material in the reactor, it is discharged through the hot air exhaust port and enters the exhaust duct 8.

[0034] In order to reduce heat waste and improve energy utilization, the present invention uses an annular auxiliary heating element 9 to reuse the hot air blown out by the dry hot air blower, providing additional heat for the mixing reactor 2, playing a role of auxiliary heating, helping to maintain the temperature required for the reaction in the mixing reactor 2, and ensuring the stability and efficiency of the reaction.

[0035] The annular auxiliary heating element 9 is sleeved on the body of the mixing reactor 2, so that the inner wall of the annular auxiliary heating element 9 fits with the body of the mixing reactor 2;

[0036] Specifically, the annular auxiliary heating element 9 includes an outer shell 10, an inner shell 11, a heat sink 12 and an air heating line pipe 13; the air heating line pipe 13 is installed in the outer shell 10 in a spiral shape. The auxiliary heat air inlet of the air heating line pipe 13 is located at the bottom, connected to the exhaust duct 8, and receives the hot air discharged from the hot air exhaust port. The auxiliary heat air outlet of the air heating line pipe 13 is located at the top, connected to the extension pipe 14, and the extension pipe 14 can be extended out of the window to discharge the hot air to the outside to reduce the indoor temperature.

[0037] One or more of glass fiber wool, ceramic fiber felt or rock wool are filled between the shell 10 and the wind heating line pipe 13. To simplify the diagram, the above fillers are not shown in the figure. The filling method and filling shape can be selected by those skilled in the art according to actual conditions. It should be noted that the one or more here refers to the selection of glass fiber wool, ceramic fiber felt or rock wool for use alone or in combination. The specific filling can be selected according to actual needs. Any one or all of them can be selected. Or a part of the area is filled with glass fiber wool, and a part of the area is filled with ceramic fiber felt. The above various implementation methods can be selected by those skilled in the art according to actual conditions, and are not limited here.

[0038] The heat sink 12 is inserted into the spiral gap of the wind heating line pipe 13 , the heat sink 12 is fixedly connected to the inner shell 11 , and the inner shell 11 is fitted with the body of the mixing reactor 2 .

[0039] A temperature regulating port is provided on the exhaust duct 8, and a sealing cover 15 is provided on the temperature regulating port, and the sealing cover 15 is threadedly connected to the temperature regulating port. It is convenient for the operator to adjust the temperature of the hot air according to the needs. When the sealing cover 15 is opened, the hot air in the exhaust duct 8 can be discharged from the temperature regulating port and the hot air entering the wind heating line pipe 13 is reduced, so that the heating temperature of the annular auxiliary heating element 9 can be controlled, thereby improving the operation flexibility of the device and the control of the reaction conditions.

[0040] The specific experimental process of applying the device of the present invention is as follows:

[0041] 1. Preparation

[0042] Check the equipment: Check the sealing of the drying reactor and the mixing reactor, and check whether the valves and connecting pipes are normal. Confirm that the heating device (oil bath heating device or electric heating jacket device), drying hot air blower, annular auxiliary heating parts and other equipment are working properly.

[0043] Material preparation: Choose PVA (polyvinyl alcohol) with a suitable molecular weight, which generally ranges from tens of thousands to hundreds of thousands. Prepare a certain amount of activated carbon.

[0044] 2. Activated carbon pretreatment and PVA solution preparation

[0045] The activated carbon is put into the drying reactor through the feeding port on the top of the drying reactor body.

[0046] Turn on the drying hot air blower, set the temperature at 100-120℃, and dry for several hours to remove the moisture and other volatile impurities adsorbed on the surface of the activated carbon. The hot air in the exhaust duct serves as the heat source of the annular auxiliary heating element, enters the annular auxiliary heating element from the auxiliary heating air inlet of the wind heating line pipe, and heats the mixing reactor, which is now filled with distilled water.

[0047] According to the coating requirements, the mass ratio of PVA to water is determined to be between 5% and 20%. For example, if a 10% PVA solution is to be prepared, 10 g of PVA is weighed.

[0048] Slowly add PVA to the distilled water in the mixing reactor, stirring while adding. Turn on the heating device of the mixing reactor, control the temperature at 80-90°C, and continue stirring for 1-2 hours until the PVA solution becomes uniform and transparent.

[0049] 3. Mixing and evaporation of activated carbon and PVA solution

[0050] Add the pretreated activated carbon to the PVA solution in the mixing reactor, and determine the mass ratio of activated carbon to PVA solution according to the experimental design. Stir to fully disperse the activated carbon particles in the PVA solution. At this time, put the new activated carbon that needs to be pretreated into the drying reactor through the feeding port on the top of the drying reactor body for pretreatment.

[0051] The coating is carried out by solvent evaporation method, and the temperature of the mixed reaction kettle is adjusted to 60-80° C. As the solvent evaporates, the concentration of PVA increases relatively, and a coating layer is formed on the surface of the activated carbon.

[0052] 4. Drying

[0053] After the coating process in the mixing reactor is completed, open the drain valve on the drain pipe at the bottom of the mixing reactor to drain the residual liquid in the reactor. Put the product into the drying reactor through the feeding port of the drying reactor. At this time, the pre-treated activated carbon in the drying reactor is taken out and set aside. After waiting for the preparation of the new PVA solution, a new round of coating is carried out in the mixing reactor.

[0054] The drying hot air blower is turned on, and the drying hot air blown out by the drying hot air blower enters the drying reactor through the drying hot air inlet to dry the product, so as to remove the residual solvent or unreacted substances and make the coating layer more stable.

[0055] The coating device of the present invention realizes the recycling of hot air by introducing the hot air discharged from the drying reactor into the annular auxiliary heating element through the exhaust duct. The hot air discharged from the hot air exhaust port of the drying reactor can be used as a heat source of the annular auxiliary heating element to provide auxiliary heating for the mixing reactor, thereby reducing energy waste, improving the energy utilization efficiency of the entire system, and reducing the energy cost of preparing ultra-high strength activated carbon.

[0056] The annular auxiliary heating component is sleeved on the kettle body of the mixing reactor, and the wind heating line pipe is spirally installed in the outer shell, and its inner wall fits with the kettle body of the mixing reactor, which can provide more uniform auxiliary heating for the mixing reactor. Compared with the traditional heating method, it can better ensure the temperature uniformity in the mixing reactor, which is beneficial to the reaction uniformity in the activated carbon coating process and improves product quality.

[0057] The mixed reactor can also be heated by a heating device arranged at the bottom of the reactor, and combined with auxiliary heating of an annular auxiliary heating element, the heating is made more sufficient and efficient, ensuring that the activated carbon and the coating material can react at a suitable temperature in the mixed reactor.

[0058] One or more of glass fiber wool, ceramic fiber felt or rock wool are filled between the outer shell and the air heating line pipe. These materials have good thermal insulation properties, can effectively reduce the heat loss of the annular auxiliary heating parts, ensure that more heat is transferred to the mixing reactor, improve the heat utilization efficiency, and reduce the heat loss of the entire device, which is conducive to saving energy and maintaining a stable reaction temperature.

[0059] The spiral gap of the air heating line pipe of the annular auxiliary heating part is inserted into the heat sink, the heat sink is fixedly connected to the inner shell, and the inner shell fits the kettle body of the mixing reactor. This structure can make the heat more evenly distributed around the kettle body of the mixing reactor, avoid local overheating or overcooling, improve the uniformity and stability of heat dissipation, and help improve the quality and efficiency of the coating process.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that not every embodiment contains only one independent technical solution. In the absence of a conflict of solutions, the various technical features mentioned in each embodiment can be combined in any manner to form other implementation methods that can be understood by those skilled in the art.

[0061] In addition, without departing from the scope of the present invention, the technical solutions described in the aforementioned embodiments may be modified, or some of the technical features may be replaced by equivalents, without causing the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coating device for preparing ultra-high strength activated carbon for experiment, comprising a mixing reactor and a drying reactor; characterized in that: It also includes an exhaust duct and an annular auxiliary heating element; A feeding port is provided on the top of the drying reactor; a drying hot air inlet is provided on one side of the drying reactor, and a drying hot air blower is provided at the drying hot air inlet; a hot air exhaust port is provided on the other side of the drying reactor, and an exhaust duct is connected to the hot air exhaust port; The annular auxiliary heating element is sleeved on the kettle body of the mixing reactor so that the inner wall of the annular auxiliary heating element fits the kettle body of the mixing reactor; the auxiliary heat air inlet of the annular auxiliary heating element is connected to the exhaust duct to receive the hot air discharged from the hot air exhaust port.

2. A coating device prepared by ultra-high strength activated carbon for experiment as claimed in claim 1, characterized in that: The annular auxiliary heating component includes an outer shell and an air heating line pipe; the air heating line pipe is spirally installed in the outer shell, the auxiliary heating air inlet of the air heating line pipe is located at the bottom, and the auxiliary heating air outlet of the air heating line pipe is located at the top.

3. A coating device prepared by ultra-high strength activated carbon for experiment as claimed in claim 2, characterized in that: One or more of glass fiber wool, ceramic fiber felt or rock wool is filled between the shell and the wind heating line pipe.

4. A coating device prepared by ultra-high strength activated carbon for experiment as claimed in claim 3, characterized in that: The annular auxiliary heating element also includes an inner shell and a heat sink; the heat sink is inserted into the spiral gap of the air heating line pipe, the heat sink is fixedly connected to the inner shell, and the inner shell fits the kettle body of the mixing reactor.

5. A coating device prepared by ultra-high strength activated carbon for experiment as claimed in claim 4, characterized in that: A temperature regulating port is provided on the exhaust duct, and a sealing cover is provided on the temperature regulating port, and the sealing cover is threadedly connected to the temperature regulating port.

6. A coating device prepared by ultra-high strength activated carbon for experiment as claimed in claim 5, characterized in that: A heating device is arranged at the bottom of the mixing reactor, and the heating device is an oil bath heating device or an electric heating jacket device.

7. A coating device prepared by ultra-high strength activated carbon for experiment as claimed in claim 6, characterized in that: A drain pipe is arranged at the bottom of the mixing reactor, and a drain valve is installed on the drain pipe.

8. A coating device prepared by ultra-high strength activated carbon for experiment as claimed in claim 7, characterized in that: The mixing reactor is selected from a stainless steel reactor, a glass-lined reactor or a glass reactor.

9. A coating device prepared by ultra-high strength activated carbon for experiment as claimed in claim 8, characterized in that: It also includes an extension pipe; the extension pipe is connected to the auxiliary heat outlet of the wind heating line pipe.

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