Phase-change nano biochar composite material solution preparation system

Abstract

The utility model discloses a phase change nano biochar composite material solution preparation system which comprises an ultrasonic disperser, a microwave heater, an ultrasonic atomizer, a microwave mixing heater, a negative pressure adsorber, a cooler, a polymerization reactor and a centrifugal machine, a discharge port of the ultrasonic disperser and a discharge port of the ultrasonic atomizer are respectively connected with a feed port of the microwave mixing heater through pipelines, and a discharge port of the microwave mixing heater is sequentially connected with the negative pressure adsorber, the cooler, the polymerization reactor and the centrifugal machine through pipelines. And the discharge hole of the centrifugal machine is the discharge hole of the phase-change nano biochar composite material solution preparation system. According to the utility model, the phase-change nanometer biochar composite material solution which adsorbs the phase-change material in the pores of the biochar and coats the nanometer shell material can be prepared, and the phase-change nanometer biochar composite material solution has a good and long-acting temperature control effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of biochar material production, and specifically relates to a biochar material preparation system, in particular to a phase-change nano biochar composite material solution preparation system. Background Art

[0002] During highway construction, asphalt concrete materials are widely used in pavement construction due to their good road performance. However, asphalt itself is a temperature-sensitive material, and its stability and performance are easily affected by ambient temperature fluctuations, especially spring thaw and autumn freeze, extreme high and low temperature changes, and heavy rain and snow weather. Under the effects of freeze-thaw cycles and water temperature coupling, asphalt pavement is very likely to cause various diseases. Asphalt pavement diseases not only seriously affect its working performance and shorten its service life, but also increase the cost of pavement maintenance.

[0003] At present, the above problems are mainly solved by asphalt modification, fiber addition, optimization of mineral grading, etc. The main purpose of these methods is to improve the road material's tolerance to high cold and high heat, thereby increasing the service life of the road. They are passive responses to asphalt pavement diseases caused by environmental temperature fluctuations. Although they can increase the service life of the road to a certain extent, the effect is limited and it is still difficult to meet the needs of controlling road diseases caused by significant changes in temperature.

[0004] In order to solve the above problems, some patent documents have disclosed methods for using biochar to increase the life of asphalt pavement, that is, using plant carbon sources to prepare biochar, adding biochar to asphalt and its mixture, preparing biochar-modified asphalt and its mixture, which has high high temperature stability and does not affect its own low temperature crack resistance, and is suitable for use in high temperature and high-altitude ultraviolet areas, especially for open-graded roads with high aging performance requirements. However, these solutions do not achieve the functions of heat storage and heat release through material form transformation such as solid-liquid transformation, nor do they modify biochar to increase its active site number and porosity, nor do they perform leakage prevention treatment on biochar after it adsorbs phase change materials, so the temperature control effect of traditional biochar on asphalt pavement is still not ideal. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and provide a phase change nano-biochar composite material solution preparation system that realizes heat storage and heat release functions through solid-liquid transformation to improve the temperature control effect.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A phase-change nano-biochar composite material solution preparation system, comprising:

[0008] Ultrasonic disperser: used to disperse biochar particles through ultrasonic transduction to form biochar solution with water;

[0009] Microwave heater: used to change phase change materials from solid phase to liquid phase by microwave heating;

[0010] Ultrasonic atomizer: used to vibrate the ceramic atomizer plate and atomize the liquid phase change material through ultrasonic transduction;

[0011] Microwave mixing heater: used to form an aerosol mixture by uniformly diffusing and efficiently fusing the biochar solution and the atomized phase change material through mixed atomization and microwave heating;

[0012] Negative pressure adsorber: used to adsorb phase change materials into the pores of biochar by vacuum adsorption;

[0013] Cooler: used to cool and stabilize the phase change material in the pores of biochar to form a phase change biochar solution;

[0014] Polymerization reactor: used to polymerize the nanoshell raw material and the phase change biochar solution under high-speed stirring to generate a composite material solution;

[0015] Centrifuge: used to separate the excess nanoshell raw materials in the composite material solution by centrifugal separation to obtain a phase change nano-biochar composite material solution;

[0016] The discharge port of the microwave heater is connected to the feed port of the ultrasonic atomizer through a pipeline, the discharge port of the ultrasonic disperser and the discharge port of the ultrasonic atomizer are respectively connected to the feed port of the microwave mixing heater through pipelines, the discharge port of the microwave mixing heater is connected to the feed port of the negative pressure adsorber through a pipeline, the discharge port of the negative pressure adsorber is connected to the feed port of the cooler through a pipeline, the discharge port of the cooler is connected to the phase change biochar solution feed port of the polymerization reactor, the polymerization reactor is also provided with a nanoshell solution feed port, the discharge port of the polymerization reactor is connected to the feed port of the centrifuge, and the discharge port of the centrifuge is the discharge port of the phase change nano biochar composite material solution preparation system.

[0017] Preferably, in order to effectively utilize solar energy to save energy, the phase change nano-biochar composite solution preparation system also includes a light storage direct and flexible system, and the power output end of the light storage direct and flexible system is respectively connected to the power input end of the microwave heater, the power input end of the ultrasonic atomizer, the power input end of the ultrasonic disperser, the power input end of the microwave mixing heater, the power input end of the negative pressure adsorber, the power input end of the cooler, the power input end of the polymerization reactor and the power input end of the centrifuge.

[0018] The beneficial effects of the utility model are:

[0019] The utility model effectively integrates a microwave heater, an ultrasonic atomizer, an ultrasonic disperser, a microwave mixing heater, a negative pressure adsorber, a cooler, a polymerization reactor and a centrifuge, utilizes an ultrasonic disperser to fully disperse biochar particles and then forms a biochar solution with water, utilizes a microwave heater to transform a phase change material from a solid phase to a liquid phase and atomizes it through an ultrasonic atomizer, utilizes a microwave mixing heater to uniformly diffuse and efficiently fuse the biochar solution and the atomized phase change material to form an aerosol mixture, utilizes a negative pressure adsorber and a cooler to more stably and reliably adsorb the phase change material in the pores of the biochar, utilizes a polymerization reactor to polymerize a nanoshell raw material and a phase change biochar solution to generate a composite material solution, coats the nanoshell raw material outside the biochar pores to prevent leakage of the phase change material, and utilizes a centrifuge to separate excess nanoshell material. Finally, the utility model can prepare a phase change nano-biochar composite material solution in which the phase change material is adsorbed in the biochar pores and coated with the nanoshell material, and the phase change nano-biochar composite material solution has a good and long-lasting temperature control effect. The phase change nano biochar composite material solution prepared by the utility model is used as one of the raw materials for asphalt pavement when used. The phase change material undergoes a phase change from solid to liquid at high temperature, absorbs a large amount of heat and keeps its own temperature almost unchanged. The phase change material undergoes a phase change from liquid to solid at low temperature, releases a large amount of heat and keeps its own temperature almost unchanged. In this way, the purpose of automatic temperature control of the asphalt pavement is achieved, and the adverse effects of rutting, wave, cracking and the like on the asphalt pavement caused by extreme climatic conditions are reduced. At the same time, it also has high adhesion and excellent mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the phase change nano biochar composite material solution preparation system of the utility model. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] like Figure 1 As shown, the phase change nano biochar composite material solution preparation system of the utility model comprises:

[0023] Ultrasonic disperser 2: used to generate vibration through ultrasonic transduction to disperse biochar particles and then form a biochar solution with water;

[0024] Microwave heater 3: used to change the phase change material from solid phase to liquid phase by microwave heating;

[0025] Ultrasonic atomizer 4: used to vibrate the ceramic atomizer plate and atomize the phase change material in the liquid phase through ultrasonic transduction;

[0026] Microwave mixing heater 5: used for uniformly diffusing and efficiently fusing the biochar solution and the atomized phase change material to form an aerosol mixture through mixed atomization and microwave heating;

[0027] Negative pressure adsorber 6: used to adsorb the phase change material into the pores of the biochar by vacuum adsorption;

[0028] Cooler 7: used to cool and stabilize the phase change material in the pores of the biochar to form a phase change biochar solution;

[0029] Polymerization reactor 8: used for polymerizing the nanoshell raw material and the phase change biochar solution under high-speed stirring to generate a composite material solution;

[0030] Centrifuge 9: used to separate the excess nanoshell raw materials in the composite material solution by centrifugal separation to obtain a phase change nano-biochar composite material solution;

[0031] The discharge port of the microwave heater 3 is connected to the feed port 46 of the ultrasonic atomizer 4 through a pipeline, the discharge port of the ultrasonic disperser 2 and the discharge port of the ultrasonic atomizer 4 are respectively connected to the feed port 50 of the microwave mixing heater 5 through pipelines, the discharge port 58 of the microwave mixing heater 5 is connected to the feed port of the negative pressure adsorber 6 through a pipeline, the discharge port of the negative pressure adsorber 6 is connected to the feed port of the cooler 7 through a pipeline, the discharge port of the cooler 7 is connected to the phase change biochar solution feed port 85 of the polymerization reactor 8, the polymerization reactor 8 is also provided with a nanoshell solution feed port 81, the discharge port of the polymerization reactor 8 is connected to the feed port 91 of the centrifuge 9, and the discharge port 94 of the centrifuge 9 is the discharge port of the phase change nano-biochar composite material solution preparation system.

[0032] Preferably, in order to effectively utilize solar energy to save energy, the phase change nano biochar composite solution preparation system also includes a light storage direct and flexible system 1, and the power output end of the light storage direct and flexible system 1 is respectively connected to the power input end of the microwave heater 3, the power input end of the ultrasonic atomizer 4, the power input end of the ultrasonic disperser 2, the power input end of the microwave mixing heater 5, the power input end of the negative pressure adsorber 6, the power input end of the cooler 7, the power input end of the polymerization reactor 8 and the power input end of the centrifuge 9. The light storage direct and flexible system 1 can also be a solar cell.

[0033] The above-mentioned light storage direct and flexible system 1, microwave heater 3, ultrasonic atomizer 4, ultrasonic disperser 2, microwave mixing heater 5, negative pressure adsorber 6, cooler 7, polymerization reactor 8 and centrifuge 9 are all existing products, or have adaptive structural improvements thereto. However, in order to facilitate understanding of the specific structure of the existing products, the following is combined with Figure 1 The specific structures of the above-mentioned devices are described respectively.

[0034] The photovoltaic storage direct-flexible system 1 includes photovoltaic power generation components, energy storage system, DC distribution system and intelligent control system; the energy storage system refers to phase change material energy storage in liquid form, and the intelligent control system can flexibly adjust the device load, thereby realizing the capacity cycle and fully automatic operation of the device, which is green and environmentally friendly.

[0035] The microwave heater 3 includes a feed hopper 31 and a first microwave chamber 34. The feed hopper 31 is located above the first microwave chamber 34. The inner wall of the first microwave chamber 34 is equipped with a first magnetron 33 and an energy storage element 32. The first microwave chamber 34 is made of metal and has a maximum capacity of 1m 3 , has excellent microwave reflection performance, ensures that the microwave energy is evenly distributed in the first microwave chamber 34, and realizes rapid heating of the material. Its function is to provide a high-temperature environment, reach the phase change temperature, and transform the solid phase change material into a liquid state; the first magnetron 33 converts electrical energy into microwave energy, the operating frequency is 915MHz, and the maximum heating temperature is 200℃.

[0036] The ultrasonic atomizer 4 includes a water tank 45, a first ultrasonic generator 44, a ceramic atomizing sheet 43, a first ultrasonic transducer 42, and an airflow nozzle 41. The feed port 46 of the ultrasonic atomizer 4 is arranged at the lower part of the water tank 45; the water tank 45 is mainly used to hold liquid phase change material, the first ultrasonic generator 44 generates high-frequency electric energy, and the high-frequency electric energy is transmitted to the first ultrasonic transducer 42. The first ultrasonic transducer 42 will generate vibrations, driving the ceramic atomizing sheet 43 to vibrate. These vibrations are transmitted through the liquid in the water tank 45 to form ultrasonic sound energy. The oscillation frequency of the ceramic atomizing sheet 43 is 2.4MHz. The atomized phase change material is easier to penetrate into the microporous structure of biochar. Compared with traditional atomizers, the ultrasonic atomizer 4 can save 90% of energy; the atomized material is transmitted outward through the airflow nozzle 41.

[0037] The ultrasonic disperser 2 includes a reactor 23, a second ultrasonic generator 26, a second ultrasonic transducer 22, a stirring probe 25, and an air cooler 24. A feed port 21 for biochar feeding and water inlet is provided at the upper end of the reactor 23. The second ultrasonic generator 26 generates high-frequency electrical energy, which is transmitted to the second ultrasonic transducer 22. The second ultrasonic transducer 22 will vibrate with an amplitude range of 20-80um and an operating frequency of 20KHz. These mechanical vibrations are transmitted to the vibration probe, which directly transmits the ultrasonic vibration to the biochar particles, effectively avoiding the agglomeration of the biochar particles and facilitating the full mixing of the biochar particles with water. Since a large amount of heat is generated during the ultrasonic dispersion process, an air cooler 24 is provided on the outer wall of the reactor 23 to absorb and take away the heat generated by the equipment through circulating air, thereby reducing the temperature of the equipment and maintaining its normal operation.

[0038] The microwave mixing heater 5 comprises a second microwave chamber 59, a second magnetron 56, a spray chamber 53, a conveying pipe 51, a first liquid reservoir 52, a three-dimensional sprayer 54, an inclined conveyor belt 55 and a first movable valve 57. The spray chamber 53 is located above the second microwave chamber 59 and is interconnected. The inlet of the conveying pipe 51 is connected to the two feed ports 50 of the microwave mixing heater 5, the outlet of the conveying pipe 51 is connected to the first liquid reservoir 52, the first liquid reservoir 52 is connected to the three-dimensional sprayer 54, the inclined conveyor belt 55 is installed at the lower part of the spray chamber 53 and the first movable valve 57 is installed at the bottom; the second microwave chamber 59 is made of metal material and has a maximum capacity of 1m 3 , has excellent microwave reflection performance, ensures that the microwave energy is evenly distributed in the second microwave chamber 59, and realizes rapid heating of the material. Its function is to provide a high-temperature environment, reach the phase change temperature, and transform the solid phase change material into a liquid state; the second magnetron 56 converts electrical energy into microwave energy, the operating frequency is 915MHz, and the maximum heating temperature is 200℃.

[0039] The negative pressure adsorber 6 includes a vacuum chamber 64, an air pump 61, a vacuum gauge 63, a filter 65 and a rubber seal 62. The outer contour of the vacuum chamber 64 is close to the rubber seal 62, and the interior is in a grid shape, which can achieve efficient gas extraction performance and increase the contact area between the material and the inner cavity of the device, thereby optimizing the adsorption efficiency and ensuring that the biochar and the phase change material achieve a uniform adsorption effect. The air pump 61 extracts the gas in the vacuum chamber 64 to establish the required vacuum degree, the filter 65 prevents the aerosol phase change material from being extracted, and the vacuum gauge 63 can check the current vacuum degree; the air extraction rate of the air pump 61 is 250m 3 / h, the degassing cycle is 60s, the conveying speed is 10m / min, and a total of 10 vacuum pumps 61 are provided.

[0040] The cooler 7 includes two air coolers, an ice bath cooler and a heat exchanger 71; the air cooler includes a fan 72, a heat sink 73 and an air duct 74, the heat sink 73 can increase the heat dissipation area and improve the heat exchange efficiency, and the air duct 74 can guide the air flow; the ice bath cooler includes an ice bath container 75, a circulation pump 77 and a rotary stirrer 76; the ice bath container 75 contains a cooling medium (ice-water mixture), the circulation pump 77 drives the cooling medium to circulate in the ice bath container 75, and the rotary stirrer 76 accelerates the cooling of the material and helps the discharge; the air cooler is installed on the top of the cooler 7, and the ice bath cooler can provide a temperature range of 0°C to -100°C. Combining the dual cooling systems of the air cooling and the ice bath cooling, it can effectively reduce the ambient temperature and accelerate the dissipation of heat energy, which can promote the rapid solidification of the aerosol phase change material and achieve close integration with the pores of the biochar, but the biochar solution is not solidified, but liquefied, and the whole is still a solution; the heat exchanger 71 can convert thermal energy into electrical energy.

[0041] The polymerization reactor 8 includes a high-speed stirrer 84 arranged in a reaction container (not marked in the figure), a phase change biochar solution feed port 85 and two nanoshell material preprocessors (not marked in the figure) are respectively arranged on both sides of the upper end of the reaction container, and two nanoshell solution feed ports 81 are respectively arranged at the upper ends of the two nanoshell material preprocessors. The nanoshell material preprocessors are provided with a second movable valve 83 for adjusting the amount of nanoshell material (solution) added. The lower parts of the two nanoshell material preprocessors are connected to the second liquid reservoir 82 in the reaction container. The stirring speed of the high-speed stirrer 84 is set to 3000rpm-4500rpm. The phase change biochar solution and the nanoshell solution are stimulated to react by high-speed shear mixing in the reaction container to stimulate the polymerization reaction. The nanoshell material is coated outside the pores of the biochar to generate a composite material solution with phase change characteristics.

[0042] The centrifuge 9 comprises a centrifugal motor 90, a brake 92, a main shaft 93, a conical cover 98, a drum 97, a conveyor belt 95, a support frame 96 and a sewage outlet 99. The feed port 91 of the centrifuge 9 is arranged above the upper end of the conveyor belt 95, and the discharge port 94 of the centrifuge 9 is arranged below the drum 97; the maximum speed of the main shaft 93 is 4000rpm, the maximum relative centrifugal force is 1400g, and the maximum separation volume is 5000ml. The excess nanoshell solution in the composite material solution is separated by the centrifuge 9 to obtain a pure phase change nano-biochar composite material solution.

[0043] The specific structures of the above-mentioned devices are preferred structures of the present invention, but are not the only structures. Other structural devices with relevant main functions or similar functions in the prior art can also be selected according to actual needs.

[0044] like Figure 1As shown, when used, biochar particles and water are added from the feed ports 21 on both sides of the upper end of the ultrasonic disperser 2, and the biochar particles are fully dispersed by the ultrasonic disperser 2 to form a biochar solution with water; a solid phase change material is added from the feed hopper 31 of the microwave heater 3, and the microwave heater 3 is used to change the phase change material from a solid phase to a liquid phase; the liquid phase phase change material enters the ultrasonic atomizer 4 to be atomized; the atomized phase change material and the biochar solution enter the microwave mixing heater 5 respectively, and the microwave mixing heater 5 is used to make the biochar solution and the atomized phase change material uniformly diffuse and efficiently fuse to form an aerosol mixture; the aerosol mixture enters the negative pressure adsorber 6, and the vacuum is used to make the phase change material in the pores of the biochar The material is adsorbed more firmly; after the aerosol mixture enters the cooler 7, during the rapid cooling process, the aerosol phase change material solidifies in the biochar pores, but the biochar solution does not solidify, but liquefies, and the whole is still a solution, that is, a phase change biochar solution, and the pore structure of the biochar remains unchanged; the phase change biochar solution enters the polymerization reactor 8, so that the nanoshell raw material and the phase change biochar solution undergo a polymerization reaction to generate a composite material solution, and the nanoshell raw material is coated on the outside of the biochar pores to prevent the phase change material from leaking; finally, the excess nanoshell material is separated by a centrifuge 9, and finally a phase change nano-biochar composite material solution in which the phase change material is adsorbed in the biochar pores and coated with the nanoshell material is obtained.

[0045] The phase change nano-biochar composite material solution prepared by the utility model has a good and long-lasting temperature control effect when used as one of the raw materials for asphalt pavement. The phase change material undergoes a phase change from solid to liquid at high temperature, absorbs a large amount of heat and keeps its own temperature almost unchanged. The phase change material undergoes a phase change from liquid to solid at low temperature, releases a large amount of heat and keeps its own temperature almost unchanged. In this way, the purpose of automatic temperature control of the asphalt pavement is achieved, and the adverse effects of rutting, waves, cracking, etc. on the asphalt pavement caused by extreme climatic conditions are reduced. At the same time, it also has high adhesion and excellent mechanical properties.

[0046] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A phase change nano biochar composite material solution preparation system, characterized by: include: Ultrasonic disperser: used to disperse biochar particles through ultrasonic transduction to form biochar solution with water; Microwave heater: used to change phase change materials from solid phase to liquid phase by microwave heating; Ultrasonic atomizer: used to vibrate the ceramic atomizer plate and atomize the liquid phase change material through ultrasonic transduction; Microwave mixing heater: used to form an aerosol mixture by uniformly diffusing and efficiently fusing the biochar solution and the atomized phase change material through mixed atomization and microwave heating; Negative pressure adsorber: used to adsorb phase change materials into the pores of biochar by vacuum adsorption; Cooler: used to cool and stabilize the phase change material in the pores of biochar to form a phase change biochar solution; Polymerization reactor: used to polymerize the nanoshell raw material and the phase change biochar solution under high-speed stirring to generate a composite material solution; Centrifuge: used to separate the excess nanoshell raw materials in the composite material solution by centrifugal separation to obtain a phase change nano-biochar composite material solution; The discharge port of the microwave heater is connected to the feed port of the ultrasonic atomizer through a pipeline, the discharge port of the ultrasonic disperser and the discharge port of the ultrasonic atomizer are respectively connected to the feed port of the microwave mixing heater through pipelines, the discharge port of the microwave mixing heater is connected to the feed port of the negative pressure adsorber through a pipeline, the discharge port of the negative pressure adsorber is connected to the feed port of the cooler through a pipeline, the discharge port of the cooler is connected to the phase change biochar solution feed port of the polymerization reactor, the polymerization reactor is also provided with a nanoshell solution feed port, the discharge port of the polymerization reactor is connected to the feed port of the centrifuge, and the discharge port of the centrifuge is the discharge port of the phase change nano biochar composite material solution preparation system.

2. The phase change nano biochar composite material solution preparation system according to claim 1, characterized in that: The phase change nano-biochar composite solution preparation system also includes a light storage direct-flexible system, and the power output end of the light storage direct-flexible system is respectively connected to the power input end of the microwave heater, the power input end of the ultrasonic atomizer, the power input end of the ultrasonic disperser, the power input end of the microwave mixing heater, the power input end of the negative pressure adsorber, the power input end of the cooler, the power input end of the polymerization reactor and the power input end of the centrifuge.

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