132 results about "Microwave pyrolysis" patented technology

The invention provides a large-size fan blade double-heat-transfer-mode microwave pyrolysis system and method.In the system, ceramic chips inlaid with SiC wave-absorbing agents are arranged on the surface of a conveying belt of a material conveying unit, and a tunnel type microwave pyrolysis reactor utilizes microwaves to conduct microwave pyrolysis on the large-size fan blade under the assistance of the ceramic chips inlaid with the SiC wave-absorbing agents; the pyrolysis unit is used for pyrolyzing fan blade materials conveyed into the material conveying unit by the material conveying unit; the pyrolysis gas treatment unit is used for purification-fractional condensation and collection of organic components; and the glass fiber treatment unit realizes carbon residue separation and low-loss recovery of glass fibers through ultrasonic infiltration. The problems that waste fan blades are difficult to recycle, performance degradation of recycled glass fibers is serious, and recycling benefits are low are solved, the requirement for continuously preparing high-strength glass fiber products and co-producing liquid oil through large-size retired fan blades can be met, and microwaves can be driven through wind power generation; and a gas device is additionally arranged to supply partial energy to the system, so that the resource recovery rate and the energy utilization rate are greatly improved.

The invention belongs to the technical field of energy conversion equipment and solid resource pyrolysis conversion utilization, and discloses continuous replacement type pyrolysis equipment and a pyrolysis method thereof. The continuous replacement type pyrolysis equipment comprises a feeding system, a microwave generating system is arranged on one side of the feeding system, a carbon residue collecting system is arranged at the bottom of the feeding system, a continuous replacement system is installed in the microwave generating system, and a reaction system is installed in the continuous replacement system. One side, far away from the feeding system, of the reaction system is connected with a product collecting system; through the synergistic effect of microwave pyrolysis and dynamic replacement design, pyrolysis of crushed materials and tar cracking are integrated into a continuous process, efficient energy conversion is achieved, high-added-value products such as liquid fuel / chemicals and pyrolysis carbon residues are finally produced, and reduction, harmlessness and resourceful treatment of solid resources is promoted.

The invention discloses a method for drying sludge through microwave pyrolysis, which relates to the technical field of sludge treatment and comprises the following steps: step 1, reducing the water content of the sludge in a mechanical dehydration manner, and then screening out lumps; 2, extruding the sludge, and uniformly laying the sludge on a microwave material distribution belt; 3, the material distribution belt penetrates through a tunnel type microwave generator, and the sludge is heated and dried through microwaves; 4, the dried sludge is separated from the cloth belt, and the sludge is collected; wherein a tunnel type microwave generator adopted in the third step comprises a guide roller and a pressing roller, the guide roller makes contact with the lower surface of the cloth belt conveying part, so that the cloth belt forms an inclined section, and the pressing roller is located behind the guide roller and makes contact with the upper surface of the cloth belt conveying part, so that the cloth belt forms an arc-shaped section tightly attached to the guide roller. In the invention, the turning plate does not need to be contacted with the cloth belt, so that the condition that the surface of the conveying belt is scratched is avoided.

The utility model provides a waste salt microwave pyrolysis device. The waste salt microwave pyrolysis device comprises a pyrolysis furnace body, a stirring and conveying mechanism, a microwave generating mechanism and an atmosphere mechanism rack, the pyrolyzing furnace body comprises a furnace shell, a material separating plate is arranged in the furnace shell, and the furnace shell is divided into a microwave chamber and a pyrolyzing chamber by the material separating plate; the stirring and conveying mechanism comprises a stirring shaft, a stirring rod and a stirring rake which are arranged in the pyrolysis chamber, and the stirring shaft is connected with the motor; the microwave generating mechanism comprises a plurality of microwave magnetrons and microwave waveguides which are arranged in the microwave cavity; the atmosphere mechanism comprises an air inlet, a lower exhaust port and an upper exhaust port, the air inlet is connected with the inert gas storage tank, and the lower exhaust port and the upper exhaust port are connected with the fan. According to the device, microwaves are used as a heat source, the stirring and conveying mechanism can dynamically turn over materials, the materials are uniformly heated and fully pyrolyzed, waste salt is uniformly heated in a stirring and conveying state, organic matters in the waste salt are pyrolyzed, the pyrolysis efficiency is improved, and meanwhile, the waste salt is prevented from being molten and coked.

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 discloses a process method for microwave multi-stage catalytic reforming. A microwave reaction device provided with a microwave generator, an automatic protection unit, a PLC (Programmable Logic Controller) control unit, a carrier gas adjusting unit and a multi-stage series reaction unit is adopted to realize a microwave pyrolysis process; the process method comprises the following steps: under the action of microwaves and a microwave absorbent, pyrolyzing a reaction material into raw material steam on a reaction material layer, and sequentially conveying the raw material steam to each catalyst bed layer under the pushing of carrier gas input by a carrier gas adjusting unit, and further pyrolyzing the raw material steam into an oil product component and / or a gas fuel component by using microwaves, a catalyst and a microwave absorbent to realize catalytic reforming of the reaction material.

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 utility model discloses an industrial waste salt microwave treatment system, which relates to the technical field of waste salt pyrolysis treatment and comprises a waste salt input pipeline, a feeding hopper, a material distributing machine, a drying furnace, a tail gas treatment device, a microwave pyrolysis furnace, a water-cooling screw conveyor and a discharge conveying pipeline, the output end of the waste salt input pipeline is connected with the feeding end of the feeding hopper, the discharging end of the feeding hopper is connected with the input end of the distributing machine, the output end of the distributing machine is connected to the feeding end of the drying furnace, the salt slag discharging end of the drying furnace is connected with a feeding port of the microwave pyrolyzing furnace, and the waste gas discharging end of the drying furnace is connected to the tail gas treatment device. The discharging end of the microwave pyrolyzing furnace is connected with the feeding end of the water-cooling screw conveyor, and a waste gas exhaust port of the microwave pyrolyzing furnace is connected to a tail gas treatment device. The device can realize harmlessness and reduction of waste salt, adopts a microwave heating mode, and has the characteristics of high heating speed, uniform heating, selectivity, no direct contact between a heating source and a heating material and energy conservation.

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 provides a high-capacity microwave pyrolysis device for recycling waste crystalline silicon photovoltaic modules and a using method thereof.The high-capacity microwave pyrolysis device comprises a microwave cavity, a rotating mechanism is arranged in the microwave cavity, and a tray structure is arranged at the movable end of the rotating mechanism; a feeding conveying belt is arranged on the side, close to the feeding port, of the microwave cavity, a pushing mechanism is arranged in the feeding conveying belt, a discharging conveying belt is arranged on the side, close to the discharging port, of the microwave cavity, a pulling mechanism is arranged in the discharging conveying belt, and sensing assemblies are arranged on the inner bottom wall of the microwave cavity and in the rotating mechanism. The rotating mechanism drives the plurality of battery pieces to rotate in the microwave cavity, so that the plurality of battery pieces can be processed at the same time, the processing efficiency is remarkably improved, uniform heating of each battery piece can be ensured through the rotating mechanism, multi-point temperature monitoring can be realized through the sensing assembly, uniform distribution of microwaves is ensured, local overheating and battery piece damage are avoided, and the service life of the battery pieces is prolonged. The material pushing mechanism and the material pulling mechanism can achieve the effect of automatic feeding and discharging.

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.

A system and method for producing graphitic carbon, with the method including generating amorphous carbon by microwave pyrolysis of a natural gas feedstock in the presence of a carbon catalyst; treating the amorphous carbon with an oxidizing agent to introduce oxygen functionalities; and converting the treated amorphous carbon to graphitic carbon through electrochemical methods.

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 belongs to the technical field of caustic soda preparation through waste salt treatment, and discloses a method for preparing ionic membrane caustic soda by using waste salt, which comprises the following steps: screening the waste salt to remove impurities, and crushing to 80-120 meshes; ozone is adopted to carry out oxidation pretreatment on the crushed waste salt, the reaction temperature is 30-50 DEG C, and the reaction time is 30-60 min; carrying out microwave pyrolysis on the waste salt subjected to oxidation pretreatment, introducing inert gas for protection at the same time, and carrying out pyrolysis at 400-800 DEG C for 20-60 minutes; and preparing the waste salt subjected to microwave treatment into a saturated saline solution, and precisely filtering to obtain the saline water for preparing the caustic soda by the ionic membrane. Ozone oxidation pretreatment and microwave pyrolysis are cooperated, so that the purity of the waste salt can be effectively improved, and the waste salt can be used for a process for preparing caustic soda through ionic membrane exchange electrolysis.

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.