93 results about "Microwave pyrolysis" patented technology

The invention relates to the technical field of environmental protection data processing, and particularly discloses an intelligent environmental protection data processing method and system based on the Internet of Things. A hyperspectral camera and a low-power microwave sensor are used for synchronously obtaining a chemical component hyperspectral image and an internal structure microwave response signal of a waste material; further introducing a deep learning algorithm to extract chemical component characteristics and internal physical structure characteristics of the waste materials, and performing deep interactive joint perception on the chemical component characteristics and the internal physical structure characteristics of the waste materials to realize joint characterization of the comprehensive state of the waste materials. And on the basis, adaptive matching of a microwave cracking mode and optimal control of cracking process parameters are carried out. According to the method, the self-adaptive regulation and control of the microwave cracking process can be realized through the integrity and deep cognition of the state of the components of the waste materials, and the intelligent level and the recycling efficiency of the microwave cracking of the waste are effectively improved.

The invention discloses a tetracycline hydrochloride-containing wastewater treatment method in the field of wastewater treatment, which comprises the following steps: introducing tetracycline hydrochloride-containing wastewater into a reactor, adding a multilevel structure iron and iron sulfide composite carbon material, and adjusting the system to a nearly neutral condition; then adding potassium peroxymonosulfate composite salt, starting a direct current system, and carrying out catalytic degradation reaction under specific current density; and finally recovering the catalyst through magnetic field separation. The preparation method comprises the following steps: grinding pyrite and hematite, ball-milling and mixing the ground pyrite and hematite with orange peel powder and sodium hydroxide, and carrying out microwave pyrolysis, acid washing and drying, hydrogen peroxide surface treatment and the like to obtain a final product. According to the method, efficient degradation of tetracycline hydrochloride under the neutral condition is achieved, the catalyst can be magnetically recycled, secondary pollution is avoided, and the method has the advantages of being low in cost, easy and convenient to operate, environmentally friendly and the like.

The invention discloses a device for preparing a molten carbon fertilizer through solid waste microwave pyrolysis and waste heat recovery, and belongs to the field of solid waste treatment and recycling. The device is composed of a pretreatment unit, a microwave pyrolysis unit, a gas-solid separation unit, a gas phase treatment unit, a solid phase treatment unit and a waste heat circulation unit, solid waste enters a microwave rotary kiln after being dried and crushed, a magnetron generates microwave anaerobic pyrolysis under photovoltaic power supply, and a high-temperature gas-solid product is generated; the cyclone separator is used for separating flue gas from solid carbon, the flue gas is condensed to obtain pyrolytic oil and gas, and waste heat of medium-temperature flue gas is recovered through the heat accumulating type heat exchanger for drying; cooling the solid carbon through a heat pipe heat exchanger, recovering waste heat and liquefying urea, and mixing the solid carbon and the urea in a stirring melting pool to prepare a molten carbon fertilizer; and the waste heat backflow fan sends the carbon waste heat back to the drying chamber. The system is driven by green electricity, gas and solid phase waste heat is recovered through double paths, solid waste efficient pyrolysis-product high value-energy self-circulation is achieved, and energy consumption and carbon emission are reduced.

The invention discloses a microwave continuous regeneration system for saturated adsorption waste activated carbon, and relates to the technical field of activated carbon regeneration. The device comprises a cleaning pool, a filter press, a material drying box, a microwave pyrolysis regeneration furnace and a cooling channel which are arranged in sequence, the cleaning pool is used for cleaning the activated carbon; the filter press is used for filter-pressing and dewatering the cleaned activated carbon; the material drying box is used for drying the filter-pressed and dehydrated activated carbon; the material drying box is connected with the microwave pyrolysis regeneration furnace through a material conveying device; and the microwave pyrolysis regeneration furnace is connected with the cooling channel through a discharging pipeline. According to the system, efficient and continuous regeneration of different types of activated carbon can be achieved, meanwhile, the tail gas circulating system is used for conducting waste heat utilization on tail gas with waste heat, and the energy utilization efficiency in the activated carbon regeneration process is improved.

The invention relates to a method for extracting germanium from germanium-containing lignite through microwave pyrolysis, sulfuration and volatilization, which comprises the following steps of: drying, crushing and screening the germanium-containing lignite to obtain lignite powder; directly putting the lignite powder into a microwave pyrolyzing furnace or putting the lignite powder into the microwave pyrolyzing furnace after the lignite powder is formed, and introducing inert gas to replace air; the microwave pyrolysis furnace is started, the temperature is increased to the working temperature T, microwave pyrolysis reaction is carried out under the pyrolysis atmosphere with the gas flow rate controlled to be Q, and the microwave pyrolysis time is t; and the generated tar, pyrolysis gas and germanium-rich volatile matters are subjected to gradient collection through multi-stage condensation. The microwave pyrolysis technology is adopted, compared with traditional pyrolysis, the germanium volatilization temperature is reduced, the heat preservation time is shortened, the germanium volatilization rate is increased, the impurity rejection rate is high, the energy consumption is reduced by 50% or above, and the germanium sulfide enrichment multiple is increased by 3-5 times.

The invention discloses a method for judging and optimizing a raw material ratio in microwave synergistic pyrolysis, and relates to the technical field of solid waste recycling and biomass energy utilization. In order to overcome the defect that in-depth research and engineering application of a microwave pyrolysis process are restricted in the prior art, the technical scheme provided by the invention comprises the following steps: preparing samples from oily sludge and palm kernel shells according to a preset mass ratio, and mixing to obtain a mixed raw material; establishing an inert atmosphere and forming a controlled reaction system; applying microwave heating and collecting a sample mass change curve and temperature change data; comparing the mass change curve with a theoretical curve formed by weighted stacking of a single raw material pyrolysis curve to obtain a difference result; judging the synergistic effect strength among the raw materials according to the difference result, and outputting a synergistic effect judgment result; and determining an optimal ratio based on a synergistic effect judgment result. The method is suitable for raw material ratio judgment and optimization work of solid waste and biomass under the microwave synergistic pyrolysis condition.

The invention discloses a boat pushing type continuous microwave pyrolysis and oxidation system which comprises a conveying mechanism and a plurality of boats conveyed along the conveying mechanism and further comprises a plurality of pushing mechanisms. Boats are transferred among the conveying mechanism, the first replacement cavity, the second air replacement cavity, the third air replacement cavity and the microwave pyrolyzing furnace assembly through a pushing mechanism, and the boats of the microwave pyrolyzing furnace assembly are conveyed to the fourth air replacement cavity through a chain conveying mechanism. Boats are transferred among the fifth air replacement cavity, the oxidation furnace mechanism and the cooling mechanism through a pushing mechanism, the boats of the cooling mechanism are conveyed to the sixth replacement cavity through a chain conveying mechanism, and the pushing mechanism is used for pushing the boats in the sixth replacement cavity into the conveying mechanism. The second air replacement chamber, the third air replacement chamber, the microwave pyrolyzing furnace assembly, the fourth air replacement chamber and the fifth air replacement chamber are each provided with a nitrogen supply pipe and an exhaust pipe. Compared with the prior art, the continuous pyrolysis and oxidation of materials can be realized.

The invention relates to a preparation method of magnetic biochar and a method for cooperatively treating heavy metal pollutants through photocatalysis and adsorption of the magnetic biochar, and belongs to the technical field of environmental remediation. The method comprises the following steps: firstly, carrying out ball milling treatment on submicron ferrotitanium smoke dust through nitric acid solutions with different concentrations, and changing the submicron ferrotitanium smoke dust into nanoscale titaniferous electric furnace ash; then mixing nanoscale titanium-containing electric furnace ash with biomass, performing ultrasonic stirring, ball milling and microwave pyrolysis to generate a pyrolysis product, and performing water washing, ball milling and screening on the pyrolysis product to obtain the magnetic biochar with magnetism, photocatalysis and adsorption performance. The method disclosed by the invention is simple in process flow and can be desorbed and regenerated for use, and the concentration of effluent after photocatalysis-adsorption treatment on nitrate is lower than the national standard. The magnetic biochar can efficiently remove nitrate under different pH conditions of acidity, neutrality, alkalinity and the like, and is suitable for treating pollutants such as nitrate in surface water, underground water, domestic sewage and industrial wastewater.

The invention discloses a waste salt drying and pyrolyzing double-layer combined device which comprises a waste salt feeding system, a microwave drying furnace, a microwave pyrolyzing furnace, a pyrolyzing waste salt bin, a cooling system, a tail gas collecting system, a control system and the like. The waste salt feeding system is sequentially provided with a raw material waste salt bin and a feeding hopper elevator; waste salt in the raw material waste salt bin is conveyed to a feed port of the microwave drying furnace through the feed hopper elevator; the microwave drying furnace is located on a second-layer platform, a plate chain conveyor is arranged in the drying furnace, and waste salt entering from a feeding port moves forwards to an outlet of the microwave drying furnace through the plate chain conveyor and then falls into the microwave pyrolyzing furnace; the microwave pyrolyzing furnace is located on a first-layer platform, and a feeding port of the microwave pyrolyzing furnace is communicated with a discharging port of the microwave drying furnace through a vertical pipeline. A discharge port of the microwave pyrolyzing furnace is connected with a feed port of a discharge screw conveyor, a discharge port of the discharge screw conveyor is connected with a feed port of a pyrolyzing waste salt bin, and the waste salt is fed into the pyrolyzing waste salt bin and then enters a subsequent system to be treated.

The invention provides a sectional type plastic microwave continuous pyrolysis system and method capable of switching catalyst modules. The system comprises a continuous feeding section, a microwave pyrolysis section, a connecting section, a catalytic reaction section and a condensation separation section which are communicated in sequence. The catalytic reaction section is provided with at least two catalyst modules which are connected in parallel and a flow path switching device, and the flow path switching device can selectively guide pyrolysis airflow to one of the modules to work and isolate other modules at the same time. The method comprises the steps of pyrolysis, conveying, catalysis and condensation separation, and different catalyst modules can be switched on line by operating the flow path switching device. According to the invention, independent optimization of pyrolysis and catalysis temperature is realized through sectional design, and pollution of molten plastic to a catalyst is avoided; through a modular parallel switching technology, rapid on-line replacement of catalyst functions and flexible regulation and control of products are realized, and the operation flexibility, the continuous operation capability and the catalyst management efficiency of the device are remarkably improved.

The application discloses a nano zero-valent iron modified hemicellulose biochar composite material and a preparation method and application thereof. The preparation method comprises the following steps: mixing xylan raw materials and iron oxide, performing ball milling treatment, and then performing a carbothermic reduction process in a microwave pyrolysis device under a nitrogen protection atmosphere and a constant temperature condition, so as to obtain the nano zero-valent iron modified hemicellulose biochar material after cooling. The composite material is prepared by using the above preparation method. The composite material is applied to purification treatment of polluted wastewater containing chlorinated hydrocarbons. The composite material has low raw material cost, simple preparation method, can form stable structure pores, has good adsorption performance and catalytic activity, realizes molecular dispersion of zero-valent iron in a hemicellulose biochar matrix, and improves adsorption and reduction capacity of the composite material on chlorinated hydrocarbon pollutants.

The present invention provides a microwave roller kiln pyrolysis method and control system thereof, wherein the method comprises: obtaining target characteristic parameters in the microwave roller kiln pyrolysis equipment, the target characteristic parameters including a first current temperature within a first microwave pyrolysis zone, a second current temperature within a second microwave pyrolysis zone, a third current temperature within a third microwave pyrolysis zone, and / or the current moisture content of the object to be pyrolyzed upon entering the first microwave pyrolysis zone; determining a target processing strategy that matches the target characteristic parameters; and controlling the execution of the target processing operation according to the target processing strategy. In other words, the present invention can achieve the purpose of efficiently and rapidly processing solid waste, oily sludge, biomass, and other objects to be pyrolyzed based on the different temperatures within different microwave pyrolysis zones and / or the current moisture content of the object to be pyrolyzed upon entering the first microwave pyrolysis zone, thereby greatly improving microwave pyrolysis efficiency and reducing energy consumption, thereby extending the service life of the microwave roller kiln pyrolysis equipment.

The invention provides three-cavity synergistic microwave pyrolysis equipment based on waste heat recovery and a working method of the three-cavity synergistic microwave pyrolysis equipment, and belongs to the technical field of microwave heating. A drying cavity, a pyrolysis cavity and a cooling cavity which are longitudinally and vertically distributed are adopted in the equipment and communicate with one another through oppositely-opened closing plates driven by air cylinders, and a vertical flow type channel driven by gravity is formed; and the PLC and the touch display module realize dynamic balance of the material flow and the energy flow according to temperature data fed back by the thermocouples in the cavities. The equipment is integrated with a waste heat recovery module, biogas generated by pyrolysis is introduced into a drying cavity heat exchange pipe bundle through a circulating gas path pipe group for indirect heat exchange, then flows back to a circulating water cooling box again for further cooling, and finally enters a gas washing, drying and filtering barrel for gas washing, dehydration and multi-stage filtering, and it is ensured that pyrolysis gas reaches the standard and is discharged. Through three-cavity cooperation and efficient waste heat recovery, the material treatment efficiency and the energy utilization efficiency are improved, and the overall energy consumption of the system is reduced.

The application discloses a biomass double-moving-bed gasification hydrogen production system and method, and relates to the field of biomass hydrogen production technology. The system comprises a feeding unit for providing and continuously feeding pretreated large-size high-density biomass raw materials mixed with biochar containing alkali metal oxides and salts thereof; a microwave pyrolysis unit comprising a microwave heating cavity and a conveying screw, which is used for receiving the biomass raw materials from the feeding unit, and performing microwave pyrolysis on the biomass raw materials while the biomass raw materials are pushed and moved in the microwave heating cavity; the microwave heating cavity is provided with a washing gas channel for radial circumferential injection; a combustion gasification unit arranged at the lower part of the microwave pyrolysis unit and receiving gaseous volatile components and solid biochar from the microwave pyrolysis unit; the combustion gasification unit is provided with a throat combustion zone and a gasification zone. The application can effectively improve the biomass pyrolysis efficiency, enhance the lightness of pyrolysis products, reduce hydrogen loss caused by combustion, significantly improve the hydrogen production yield, improve the tar removal intensity of combustion gasification, and create better conditions for obtaining a final hydrogen product with higher quality.

The present application relates to a method for reducing catalyst consumption and energy consumption in the process of microwave pyrolysis of waste polymers by melt pretreatment, belonging to the technical field of microwave catalytic pyrolysis recycling. It is well known that the microwave absorption ability of polymers is poor, and when using efficient and clean microwave pyrolysis, a sufficient amount of catalyst with strong microwave absorption ability is needed to start the reaction. Usually, the mass ratio of catalyst to polymer is close to 1:1, or even higher. The present application proposes that after mixing the waste polymers with the catalyst, melt pretreatment is carried out to reduce the bulk volume of the polymers, so that the catalyst is more concentrated, thereby improving the response of the mixture to microwaves. At the same time, the catalyst consumption is reduced, and the time for microwave to start pyrolysis is also shortened. This melt pretreatment method can significantly reduce the catalyst consumption in the pyrolysis process while ensuring high microwave heating efficiency, and also indirectly increases the single processing capacity of pyrolysis, which has a significant industrialization prospect.

The invention discloses a rural biomass green resourceful treatment method based on a microwave pyrolysis technology, and belongs to the technical field of organic solid waste high-value utilization. According to the method, efficient conversion of rural biomass (straw, fruit tree branches and the like) is achieved through four core steps of pretreatment, microwave pyrolysis, product collection and cyclic utilization and intelligent regulation and control. In the pretreatment stage, the raw materials are crushed until the particle size is less than or equal to 500 microns, dried until the moisture is less than or equal to 15% and homogenized; microwave pyrolysis adopts a four-section reactor, preheating, pyrolysis catalytic cracking and cooling are sequentially completed in an inert atmosphere, and COO-rich flue gas is synchronously introduced to activate biochar; after the product is separated, the biochar is used for soil improvement or carbon sequestration, the bio-oil is used as a fuel or a chemical raw material, and the biogas is purified and then circulated back to the reactor to be combusted to supply energy. The method is high in heat efficiency, low in energy consumption and high in resource utilization rate.

The utility model discloses a microwave pyrolysis chamber and a low-radioactivity combustible solid waste microwave treatment system thereof, and belongs to the technical field of radioactive combustible waste treatment, the microwave pyrolysis chamber is internally provided with a cavity, the cavity is internally provided with a fire grate, the fire grate divides the cavity into a microwave treatment area and a furnace ash discharge area, and the microwave treatment area and the furnace ash discharge area are communicated. The microwave treatment area is provided with a feed port, a flue gas port and a microwave port, the microwave pyrolysis chamber is provided with a microwave source, the microwave port is covered with a wave-transparent body, the bottom of the furnace ash discharge area is provided with an ash discharge port, and the ash discharge port is provided with an ash storage tank. The low-radioactivity combustible solid waste microwave treatment system comprises an oxidation chamber, tail gas treatment equipment and a microwave pyrolysis chamber, a smoke inlet and a smoke outlet are formed in the upper portion and the lower portion of the oxidation chamber respectively, the smoke inlet is communicated with the smoke opening, and the smoke outlet is connected with the tail gas treatment equipment. The microwave pyrolysis treatment is high in carbonization degree, nuclides are not easy to gasify, the method is suitable for combustible waste treatment of volatile nuclides, meanwhile, the waste volume can be reduced, and the compactness of furnace ash is improved.

The application discloses a kind of bauxite catalytic microwave-assisted pyrolysis of waste and old textile resourceization method, belong to microwave-assisted catalytic pyrolysis of waste and old textile processing field.The specific steps are as follows: after washing and dewatering treatment, waste and old textile is dried, granulation;After drying bauxite, grinding and sieving;Waste and old textile and bauxite particles after granulation are treated by microwave pyrolysis;Residual solid after pyrolysis is pyrolysis carbon;After collecting gas generated in the process of pyrolysis, condensation is obtained, and incondensable pyrolysis gas and liquid pyrolysis oil are obtained;The present application utilizes bauxite as catalyst and converts waste and old textile into valuable oil, gas and carbon, realizes the maximum absorption of bauxite and waste and old textile and resource utilization.The present application has low cost, simple operation, and pyrolysis product can meet some energy utilization, so that bauxite and waste and old textile are resourceized, harmless and reduced, achieve the goal of synergistic effect of pollution reduction and carbon reduction, produce good economic benefit, social benefit and environmental benefit.

The invention provides a tannic acid-like compound based on microwave catalytic reforming of lignin and a preparation method thereof, belonging to the technical field of biomass conversion and utilization. The invention comprises the following steps: pre-treating lignin to prepare gallic acid esterified lignin; subjecting the gallic acid esterified lignin and a demethylation reduction catalyst to microwave pyrolysis reaction to obtain a microwave pyrolysis product; separating the microwave pyrolysis product to obtain a crude tannic acid-like compound solution and an unactivated demethylation reduction catalyst; calcining and activating the unactivated demethylation reduction catalyst to obtain the demethylation reduction catalyst, which is recycled to step two; purifying the crude tannic acid-like compound solution to obtain a tannic acid-like compound. The invention can efficiently convert the tannic acid-like compound into a tannic acid-like compound through modification treatment combined with microwave pyrolysis technology, and can effectively solve the problems faced by traditional natural resources in extracting tannic acid compounds, such as difficulty in large-scale extraction and uncontrollable product purity and activity.

The invention provides a preparation method, a product and application of a Fe3O4 / C composite material, and belongs to the technical field of catalysts. The preparation method of the Fe3O4 / C composite material comprises the following steps: carrying out hydrothermal reaction 1 on FeCl3. 6H2O, trisodium citrate and sodium acetate in ethylene glycol to obtain Fe3O4; and uniformly mixing the Fe3O4 and a glucose solution, and carrying out a hydrothermal reaction 2 to obtain the Fe3O4 / C composite material. By utilizing the synergistic effect of sodium citrate and sodium acetate, the invention provides a low-cost preparation method of a high-purity Fe3O4 nano material, and develops a preparation method of a Fe3O4 / C composite material taking glucose as a carbon source. Then glucose is used as a carbon source, a hydrothermal method is adopted to obtain the Fe3O4 / C micro-nano composite material, and the Fe3O4 / C micro-nano composite material has a remarkable promoting effect on biomass microwave pyrolysis.

The invention provides a metal-nitrogen-carbon material and a preparation method thereof, and relates to the technical field of functional composite material preparation. The preparation method comprises the following steps: providing a metal source, a nitrogen source, a carbon carrier and a polytetrafluoroethylene emulsion, dissolving the metal source and the nitrogen source in an alcohol solvent to obtain a metal-organic complex solution, adding the carbon carrier and the polytetrafluoroethylene emulsion into the metal-organic complex solution, and carrying out ball milling to obtain homogeneous composite slurry, the preparation method comprises the following steps: preparing a homogeneous-phase composite slurry, sequentially drying and grinding the homogeneous-phase composite slurry to obtain carbon-based composite precursor powder, and finally performing microwave pyrolysis on the carbon-based composite precursor powder under a vacuum condition at the temperature of 300-350 DEG C, the power of 500-700 W and the duration of 40-60 minutes to obtain the metal-nitrogen-carbon material. According to the method, the metal-nitrogen-carbon material can be prepared only through one-time medium-temperature microwave pyrolysis, and compared with the prior art, the technological process is greatly shortened, energy consumption is remarkably reduced, the single-batch yield is high, and the method is suitable for continuous large-scale production.

The invention relates to a preparation method and application of a core-shell catalyst for oxidizing CO and reducing NO at low temperature, and belongs to the technical field of flue gas purification. According to the core-shell catalyst, coconut shell activated carbon CSAC serves as a core, the outer side of the CSAC is coated with active components CeO2 and CoO to form a shell structure, the total mass of Ce and Co in the active components accounts for 2%-4% of that of the CSAC, and the molar weight of Co accounts for 80%-90% by taking the total molar weight of Co and Ce as 100%. The CSAC catalyst is coated with Co and Ce step by step or at the same time through acetic acid activation pretreatment, step-by-step impregnation or co-impregnation, microwave pyrolysis activation and plasma surface treatment, and CO and NO are synchronously removed under low-temperature activation of water vapor. According to the core-shell catalyst, CSAC is used as a physical support and reactant enrichment platform, a Co layer is used for leading redox cycle, a Ce layer is used for regulating oxygen species migration, Co and Ce reaction sites are used for constructing a bifunctional catalyst, coupling of two reactions of CO catalytic oxidation and NO catalytic reduction is achieved, CO and NO are efficiently removed at the same time, and the core-shell catalyst is environmentally friendly and free of pollution.

A method for catalyst-assisted microwave pyrolysis of waste plastics includes: crushing a piece of waste plastic into multiple plastic fragments; mixing the multiple plastic fragments uniformly with a catalyst substance and placing the mixed plastic fragments and catalyst substance into a microwave heating chamber; performing a microwave heating process to heat the multiple plastic fragments under an oxygen-free condition within the microwave heating chamber to form solid carbon materials and gaseous volatile substances; and transferring the solid carbon materials from the microwave heating chamber into a cooling container and directing the gaseous volatile substances from at least one gas outlet of the microwave heating chamber into a condensation pipeline to form a fuel oil in a collection container.

This invention discloses a waste circuit board processing system and method, belonging to the field of waste circuit boards. The waste circuit board processing system includes a crushing device, a dehydration device, a mixer, a microwave pyrolysis furnace, a heat exchanger, an absorption tower, an adsorption system, an incineration system, and a chimney, arranged sequentially along the processing direction. The desorption gas outlet of the adsorption system is connected to the incineration system via a pipeline, and the exhaust port of the adsorption system is connected to the chimney via a pipeline. The exhaust port of the incineration system is connected to both the chimney and the adsorption system via pipelines. This invention employs a microwave high-temperature pyrolysis + oxide absorption process to separate the circuit board metal from the substrate, effectively reducing the generation of gases such as dioxins.

The application adopts microwave pyrolysis of waste plastic polyethylene terephthalate (PET) to prepare porous carbon catalytic material, and applies it to peroxymonosulfate (PMS) catalytic activation to degrade organic pollutants such as carbamazepine (CBZ). Microwave absorber cobalt nitrate and initial carbonized alpha-cellulose are used to assist the carbonization of waste plastic PET, and thiourea is used as a metal sulfidation reagent to prepare the waste plastic derived porous carbon material catalyst in a commercial microwave oven with a power of 800W for 10 minutes. The formation of cobalt oxide, the generation of cobalt sulfide, the introduction of C=O and oxygen vacancies, and the increase of specific surface area are all conducive to the improvement of the degradation performance of the catalyst to organic pollutants. The best catalyst S 0.3 -Co@P2C can achieve 100% CBZ degradation in 15 min, and the rate constant is 0.7445 min ‑1 . Compared with the traditional pyrolysis method, the microwave treated carbon material is not only more conducive to the formation and exposure of active sites (CoS and CoO) in the catalytic material, but also conducive to the generation of SO4 •‑ ·OH, O2 •‑ and 1 O2 by PMS catalytic activation. In addition, the introduction of PET is conducive to the formation of C=O in the catalytic material to promote PMS activation and accelerate the non-radical pathway to degrade CBZ.

The present invention discloses a method for drying sludge by microwave pyrolysis, which relates to the field of sludge treatment technology and includes the following steps: Step 1: reducing the moisture content of the sludge by mechanical dehydration, and then screening out lumps; Step 2: squeezing the sludge and evenly laying it on a microwave cloth belt; Step 3: the cloth belt passes through a tunnel-type microwave generator, and the sludge is heated and dried by microwaves; Step 4: separating the dried sludge from the cloth belt and collecting the sludge; wherein the tunnel-type microwave generator used in Step 3 includes a guide roller and a pressure roller, wherein the guide roller contacts the lower surface of the cloth belt conveyor portion, forming an inclined section of the cloth belt, and the pressure roller is located behind the guide roller and contacts the upper surface of the cloth belt conveyor portion, forming an arc-shaped section that closely fits the guide roller. In the present invention, the flap does not need to contact the cloth belt, thereby avoiding scratches on the conveyor belt surface.

The invention provides a test system and method for coupling non-focused microwave radiation pyrolysis of a coal sample with permeation CT scanning, and belongs to the field of coal in-situ pyrolysis. The system comprises a microwave generation system, a pyrolysis seepage cavity, a pyrolysis seepage gas injection system, a loading system, a product collection system, a data acquisition system and a cooling system, the microwave generation system emits microwaves, a coal sample in the pyrolysis seepage cavity is heated, non-focused microwaves are formed in the cavity, and the in-situ microwave pyrolysis state is simulated; a pyrolysis experiment and a permeation experiment of the coal sample can be completed by injecting pyrolysis atmosphere or permeation gas into the cavity through the pyrolysis permeation gas injection system; the pyrolysis seepage cavity is directly placed on a CT scanner to be scanned, and the change conditions of coal sample hole fractures at different pyrolysis temperatures can be observed. The method can be used for analyzing the evolution law of microwave pyrolysis on the physical microstructure, permeability and mass and heat transfer of coal, and overcomes the defects of a traditional test method.

The application provides a preparation method of a cowpea leafhopper repellent and application thereof, and belongs to the technical field of green prevention and control of agricultural pests. The preparation method is as follows: activated biochar obtained by microwave pyrolysis of straw powder and activated by phosphoric acid is mixed with intercalated montmorillonite-PVA compound obtained by intercalating aluminum ions into montmorillonite and modifying the intercalated montmorillonite with polyvinyl alcohol, and then the mixture is modified with KH-550 to obtain a supported controlled-release carrier; linalool, geraniol and methyl salicylate are loaded on the supported controlled-release carrier to prepare a core; trans-2-hexenal and trans-2-octenal are loaded on the core to prepare a core-shell structure microsphere; the core-shell structure microsphere is coated with poly-N-isopropyl acrylamide to prepare a multi-stage controlled-release microsphere; and the multi-stage controlled-release microsphere is used to prepare the cowpea leafhopper repellent for preventing and controlling cowpea leafhoppers. The application improves the loading capacity and adsorption stability of active components, and improves the compatibility with the wax layer of cowpea leaves. The preparation of the application shows fast effect and long persistence.

The present invention discloses a monolithic catalyst for alkylanthraquinone hydrogenation and a preparation method thereof, the monolithic catalyst comprises a carrier and an active component, the carrier is a rare earth metal doped porous silicon carbide ceramic material, the active component is a noble metal, the loading amount of the noble metal is 0.05-2.0% of the mass of the carrier, and the loading amount of the noble metal is 0.05-2.0% of the mass of the carrier. The loading amount of the noble metal is calculated according to the mass of the active metal. The rare earth doped porous silicon carbide ceramic is prepared by adopting a microwave pyrolysis-atmosphere induced reduction method, and then the monolithic catalyst for alkylanthraquinone hydrogenation is obtained by adopting an impregnation method, so that compared with an industrial anthraquinone hydrogenation fixed bed catalyst, bed pressure drop is hardly generated; and meanwhile, the catalyst has excellent hydrophobicity, relatively high compressive strength, high noble metal dispersity and high catalyst stability.

The invention relates to the technical field of application of biomass quantum dots, and discloses a preparation method and application of a biomass quantum dot coating inclined tube, the preparation method of the biomass quantum dots comprises the following steps: S1, taking rubber tree barks of 6-10 years old, washing with clear water, dicing, drying and crushing to obtain rubber tree powder; s2, adding the rubber tree powder into 68-70% concentrated nitric acid, stirring for 6-9 hours, performing solid-liquid separation through vacuum filtration, repeatedly washing a solid phase with deionized water until filtrate is neutral to obtain solid-phase powder, and drying the solid-phase powder; s3, carrying out microwave pyrolysis on the dried solid-phase powder in an inert environment; performing ultrasonic treatment in pure water for 30 to 40 minutes; and finally, centrifuging to obtain a biomass quantum dot solution. According to the biomass quantum dots, the use of harmful substances is avoided, the preparation process is simple, the cost is low, and a new application way is provided.