97 results about "Co pyrolysis" patented technology

The invention relates to a silicon-carbon composite material with a porous structure and a preparation method thereof, and the silicon-carbon composite material with the porous structure comprises an N / P co-doped porous carbon skeleton with micropore, mesopore and macropore channel networks, and amorphous or low-crystalline nanometer silicon particles which are uniformly loaded in the porous carbon skeleton and have the average particle size of 15-40nm, the mass percent of silicon in the composite material is 40-60%, and good interface bonding is formed between silicon and carbon. The preparation method mainly comprises the following steps: firstly, preparing an N / P co-doped porous carbon skeleton through a template method in combination with high-temperature carbonization and N / P source co-pyrolysis; and hydrolyzing an organic silicon source in the carbon skeleton to form silicon dioxide, and performing low-temperature metal thermal in-situ reduction to obtain the nano-silicon loaded composite material. Through a unique porous carbon skeleton design and a precise in-situ composite strategy of nano silicon, the prepared material shows high specific capacity, high initial coulombic efficiency and excellent cycling stability and rate capability when being used as a negative electrode of a lithium ion battery.

The invention relates to the technical field of supercapacitors, in particular to an alkali-activated solid-waste-based supercapacitor and a preparation method thereof.The preparation method comprises the steps that industrial solid waste and fiber forestry and agricultural residues are subjected to co-pyrolysis to form organic-inorganic composite solid waste gelling powder, an alkali activator and a functional additive are added to prepare alkali-activated slurry, and the alkali-activated slurry is prepared; pouring, molding and curing to obtain an alkali-activated solid waste-based electrolyte substrate; the method comprises the following steps: performing high-temperature pyrolysis, activation and the like on granular agricultural and forestry wastes to prepare a carbon-based composite conductive material, and preparing a biochar electrode plate; the preparation method comprises the following steps: taking PVDF as a raw material, bonding and curing the PVDF and the raw material, immersing the PVDF and the raw material into a KOH solution containing a PVA thickener, inserting a glass fiber diaphragm, and regulating and controlling the use amount of PVDF and other binders and a solvent system to optimize slurry viscosity and film forming uniformity so as to obtain an electrode film with mechanical flexibility and interface adhesive force; the composite electrode forms a stable composite interface in the process of being in contact with an alkali-activated electrolyte interface, and the phenomena of interface aging and capacitance attenuation caused by mismatching between the electrode and the electrolyte in a traditional cement-based system are effectively avoided.

The invention relates to a calcium-based difunctional composite material and a preparation method and application thereof, the calcium-based difunctional composite material is applied to pollution control in a sludge-low-rank coal co-pyrolysis process, the calcium-based difunctional composite material is composed of Ca2Fe2O5 and an adsorptive material, and the mass ratio of Ca2Fe2O5 to the adsorptive material is 1: 1. According to the calcium-based bifunctional composite material, the fixation rate of sulfur in pyrolytic carbon is remarkably increased, conversion of heavy metal to a more stable form is facilitated, and the leaching capacity and potential ecological risks of the heavy metal are remarkably reduced.

The invention relates to the technical field of agricultural resources and environment, and particularly discloses a rapid fertilization improvement method for newly-reclaimed red soil dry land. The method systematically integrates the core steps of soil diagnosis aluminum toxicity passivation, composite conditioner deacidification, two-stage deep ploughing, organic and inorganic biological synergistic fertilization, soil moisture content regulation and control, earth surface covering, green manure planting and returning to the field and the like. The applied composition comprises a soil composite conditioner, a charcoal-based organic fertilizer and a specific functional microbial agent, wherein the soil composite conditioner comprises modified oyster shell powder, a calcium magnesium phosphate fertilizer, humic acid, polyglutamic acid and the like. The method relates to key processes such as temperature programming calcination modification of raw materials, co-pyrolysis and composite granulation of the materials and the like. The method can synchronously and quickly improve the chemical and biological properties of soil and optimize the physical structure of a plough layer, and has the advantages of high improvement targeting, synergistic interaction of all steps, high fertilizing speed and lasting effect; in addition, the method has the advantages of being coherent in process, high in resource utilization efficiency and easy to implement on a large scale.

The invention discloses a method for strengthening a co-pyrolysis synergistic effect based on hydrothermal-forming pretreatment. The method comprises the following steps: 1, grinding and screening raw materials, namely oil-rich coal and lignin, and then drying; 2, uniformly mixing with a CaO catalyst, and carrying out hydrothermal pretreatment to obtain a mixture to be formed; 3, mixing the to-be-formed mixture with deionized water, and carrying out double-roller forming treatment to obtain a formed substance; 4, carrying out a co-pyrolysis reaction on the molded product to generate solid semi-coke and a pyrolysis oil gas product; and 5, condensing and separating the pyrolysis oil-gas product to obtain pyrolysis tar and pyrolysis gas, and collecting solid semi-coke. According to the invention, the CaO catalyst, the hydrothermal pretreatment and the double-roller forming are utilized to synergistically improve the yield and the quality of the co-pyrolysis product of the oil-rich coal and the lignin, so that the co-pyrolysis synergistic effect of the oil-rich coal and the lignin can be enhanced to improve the yield of high-value components, and the emission of greenhouse gases and pollutants in the pyrolysis process can be reduced; and high-value utilization of oil-rich coal and waste lignin resources is realized.

The invention discloses an oil-containing solid waste and plastic co-pyrolysis method based on carbon residue in-situ catalysis, and belongs to the technical field of solid waste resource utilization. The method comprises the following steps: pre-treating and mixing oil-containing solid waste and waste plastic, and co-pyrolyzing to prepare primary carbon residue and pyrolysis steam; performing acid dipping or oxidation modification on the primary carbon residue to obtain modified carbon residue, performing in-situ catalytic reforming on the pyrolysis steam and the modified carbon residue under the condition that the temperature is not lower than the final pyrolysis temperature, performing fractional condensation separation on a product to obtain pyrolytic oil and hydrogen-rich gas, and performing high-valued preparation on a functional material from the secondary residue. According to the method, the problems that a catalyst needs to be additionally added and the product quality is low in the existing co-pyrolysis technology are solved. No additional catalyst is needed in the whole process, the process cost is reduced, and related secondary pollution of the catalyst is avoided; product quality improvement is effectively achieved, two kinds of solid waste are treated synchronously, and remarkable environmental protection and economic and social benefits are achieved.

This invention provides an intelligent optimization method and system for co-pyrolysis feedstock ratio, relating to the field of data processing technology. The method includes: acquiring feedstock data; constructing a co-pyrolysis reaction characterization feature dataset under different ratio conditions based on the feedstock data, wherein the co-pyrolysis reaction characterization features include multi-scale reaction features and reaction trajectory features; constructing a kinetic feature dataset based on the reaction trajectory features; constructing a causal network for the co-pyrolysis feedstock ratio based on the co-pyrolysis reaction feature dataset and the kinetic feature dataset; constructing a causal constraint reinforcement learning environment based on the causal network; determining a co-pyrolysis feedstock ratio optimization strategy using a temporal difference reinforcement learning algorithm based on the causal constraint reinforcement learning environment; evaluating the reversibility of the co-pyrolysis feedstock ratio optimization strategy to determine the final strategy; and executing the final strategy.

The invention relates to an in-situ and ex-situ catalytic pyrolysis device with a movable heating area and a pyrolysis method. The in-situ and ex-situ catalytic pyrolysis device comprises a rack; the reaction tube is axially and horizontally arranged on the rack; the left end of the reaction tube is communicated with a nitrogen cylinder through a rotary joint, a flow meter and a pressure reducing valve; the first end of the three-way pipe is connected with the right end of the reaction pipe through a rotary joint, the second end of the three-way pipe is connected in series with the first condenser and the first gas storage bag through a first stop valve, and the third end of the three-way pipe is connected in series with the second condenser and the second gas storage bag through a second stop valve; the tubular heating furnace is horizontally arranged on the rack in a sliding manner along the axial direction of the reaction tube, and a first heating area and a second heating area which are different in temperature are arranged in the tubular heating furnace; according to the device, on the basis that the in-situ catalytic reaction and the ex-situ catalytic reaction are carried out in the same device, the influence of the heating rate on the rapid pyrolysis of the raw materials is avoided, the full contact between different raw materials in the co-pyrolysis process and the maximum production of target products are ensured, and a catalyst evaluation function is also considered.

The application discloses a method for preparing biofuel by low-temperature dechlorination of waste PVC and coupling biomass co-pyrolysis, which comprises the following steps: drying, crushing and screening waste PVC, and then performing low-temperature dechlorination in an inert atmosphere, wherein the carrier gas is inert gas, the dechlorination temperature is 340-380 DEG C, the dechlorination time is 20-40 min, and dechlorinated PVC is obtained; crushing and drying the dechlorinated PVC, and then mixing the dechlorinated PVC with biomass at a mass ratio of 0.1-10:1, and then heating and pyrolyzing at 500-700 DEG C for 20-40 min to obtain biofuel. The method achieves good dechlorination effect through step-by-step pyrolysis, and improves the quality of biofuel; the method has a simple process flow, does not need to add any catalyst and adsorbent, and has a good industrial application prospect.

The invention relates to the technical field of sewage treatment, in particular to a manganese oxide modified red mud-biochar magnetic adsorbent and a preparation method thereof. According to the method, magnetic red mud-biochar is prepared from red mud and biomass through co-pyrolysis, KMnO4, MnSO4 and the red mud-biochar are mixed, and the red mud-biochar is modified through generated manganese oxide in a co-precipitation mode. According to the method, manganese oxide can be uniformly loaded on the surface of the magnetic red mud-biochar composite material, so that the removal capacity on ammonia nitrogen and Mn < 2 + > is improved, and meanwhile, the raw material cost of magnetization modification is reduced; the adsorbent can be quickly separated and recycled, has good cyclic recycling performance, and provides a novel functional material which is green, low in cost, simple and convenient to operate, excellent in performance and environment-friendly for industrial wastewater, agricultural non-point source pollution and urban sewage treatment.

The present application relates to the technical field of environmental protection and resource comprehensive utilization, and is an oil and gas composition and a preparation method thereof, wherein the oil and gas composition is prepared according to the following steps: first, a required amount of oil sand and oil-containing waste white clay are crushed, dried and then uniformly mixed to obtain a mixture; then, the mixture is co-pyrolyzed in an oxygen-free environment to obtain the oil and gas composition, wherein the oil and gas composition comprises pyrolysis gas and clean fuel oil. The present application obtains pyrolysis gas and clean fuel oil by co-pyrolyzing oil sand and oil-containing waste white clay, the raw materials are reasonably matched, sulfides in the oil sand react with oxides in the residue of the oil-containing waste white clay, the generation of sulfides is reduced, the porous structure of the waste white clay enhances the diffusion efficiency of pyrolysis volatiles, inhibits secondary cracking and coking, improves the quality of oil products, co-pyrolysis effectively reduces the oil content of the residue, and no other catalyst is needed, thereby realizing efficient energy recovery, low-energy-consumption operation, harmless and resource utilization of solid waste.

The present invention discloses a method for preparing upgraded tar by co-pyrolysis of lignite and waste plastic (PE). The method comprises the following steps: pre-treating the raw materials lignite and waste plastic (PE), uniformly mixing a certain amount of the treated lignite with the waste plastic (PE) in a mass ratio of 7:3 to obtain a lignite / waste plastic (PE) mixed sample, and adding the sample to a fixed-bed pyrolysis reactor; heating the lignite / waste plastic (PE) mixed sample in the fixed-bed pyrolysis reactor to 440-540°C under an N2 atmosphere for pyrolysis reaction; after the reaction is completed, the gaseous product is passed into a spherical cold trap filled with n-hexane solvent, the spherical cold trap being immersed in an ice-salt bath at 0-5°C to capture the pyrolysis liquid product; filtering the obtained pyrolysis liquid product to remove impurities, and then rotary evaporating to remove the n-hexane solvent to obtain upgraded tar. This method not only achieves the synergy of the pyrolysis processes of the two, but also increases the PE content in the raw materials to 30%, and most importantly, improves the quality of the tar and pyrolysis gas.

The invention discloses a preparation method of a porous capacitor material rich in heteroatom doping. The preparation method comprises the following steps: uniformly mixing lignocellulose biomass and microalgae, and then carrying out a co-pyrolysis carbonization reaction; and carrying out activation and plasma doping modification on the co-pyrolysis biochar prepared by the co-pyrolysis carbonization reaction. According to the method disclosed by the invention, the microalgae can fully realize self-doping of a nitrogen element, and the lignocellulosic biomass provides a rich carbon-based framework, so that the prepared biochar contains more void structures and nitrogen-containing functional groups; meanwhile, the lignocellulose biomass and microalgae co-pyrolysis charcoal are further subjected to low-temperature plasma doping modification, so that the amount of heteroions introduced to the surface of the co-pyrolysis charcoal is synergistically increased, a certain defect structure is further formed on the surface, and an oxidation-reduction reaction is facilitated; the co-pyrolysis biochar modified by microalgae and NH3 has the lowest contact resistance and the most excellent double-electric-layer capacitance characteristic, and the specific capacitance reaches up to 216 F / g.

The application discloses a kind of photothermal synergic catalysis co-pyrolysis system and method of marine organic solid waste, method includes the following steps: waste fishing net, plastic garbage and seaweed are crushed and mixed uniformly according to mass ratio (2-4):(3-5):(1-3);Mixed material and multifunctional composite photocatalyst prepared by seaweed are sent into moving bed reactor according to mass ratio (10-20):1, under the condition of concentrated solar energy leading, electric heating auxiliary, continuous co-pyrolysis is carried out;Pyrolysis product is separated by three-stage condensation to obtain heavy oil, light oil, water and gas.The method realizes the green cycle of "waste treatment", the catalyst cost is low, the degree of system intelligence is high, and provides an efficient, environmentally friendly, economically feasible innovative path for the resource utilization of marine organic solid waste.

Disclosed herein is a method for co-pyrolysis of a polyolefin and a rubber containing material comprising: operating at least a pyrolysis stage of a pyrolysis reactor at an operating temperature at or above the temperature at which pyrolysis of both the polyolefin and the rubber containing material commences and up to about 600° C. under a substantially inert atmosphere; feeding a mixture comprising the polyolefin and the rubber containing material into the pyrolysis reactor; co-pyrolysing the mixture in the pyrolysis reactor to produce a pyrolysis gas comprising volatile pyrolysis products of the polyolefin and the rubber, wherein the volatile pyrolysis product of the olefin comprises at least a short chain olefin and the volatile product of the rubber comprises at least a diene; and facilitating a gas phase reaction between the short chain olefin and the diene to produce a volatile gas comprising single-ring aromatic hydrocarbons.

The invention discloses a catalytic reaction system for zero-carbon fuel pretreatment and straw co-pyrolysis. The catalytic reaction system comprises a co-pyrolysis reaction furnace, a zero-carbon fuel pretreatment device, a straw treatment device, a condensation collection device and a heat energy recovery device, the co-pyrolysis reaction furnace is provided with a microwave generator, and the zero-carbon fuel pretreatment device and the straw treatment device are respectively communicated with the co-pyrolysis reaction furnace; the condensation collection device comprises a condensation box communicated with the co-pyrolysis reaction furnace through a smoke exhaust pipe, a condensation pipe arranged in the condensation box, an oil collection tank communicated with the condensation pipe and a gas collection tank communicated with the condensation box, and the heat energy recovery device comprises a water tank forming a circulation loop with the condensation pipe and one or more preheating water pipes led out of the circulation loop. And the heat exchange section of the preheating water pipe is arranged in the interior or the shell of the pretreatment device and the straw treatment device. Heat energy of oil gas is recycled, zero-carbon fuel and straw are preheated, the pyrolysis efficiency is improved, and meanwhile resource waste can be reduced.

The present invention relates to a method for the co-pyrolysis of biomass and mineral raw materials for activating the mineral raw materials and to the use of the resulting pyrolysis product in the construction industry, in horticulture and landscaping, as a carrier and filter material, in energy storage technology, and as a CO2 sink.

The invention relates to a high-first-effect quick-charge type nitrogen and phosphorus co-doped hard carbon negative electrode material, a preparation method thereof and a sodium ion battery. The preparation method comprises the following steps: crushing biomass by using a crusher to obtain biomass powder; deionized water is adopted to wash the biomass powder, and then the washed biomass powder is dried at a first preset temperature for a first preset time; uniformly mixing the pretreated biomass powder, an activating agent and a nitrogen doping agent according to a preset mass ratio; placing the mixed material in a first tubular furnace in an inert gas atmosphere for carbonization and calcination; cooling the calcined product to room temperature, taking out the calcined product, transferring the calcined product into an acid solution, stirring and cleaning, repeatedly washing the calcined product with deionized water until the calcined product is neutral, and drying the calcined product in a drying oven at a second preset temperature for a second preset time; the mode of high-temperature nitriding presintering and vapor phase phosphorus deposition is adopted, and element distribution uncontrollability, namely uneven distribution, of a traditional co-pyrolysis method is broken through.

The application discloses a method for preparing a Fenton-like catalyst by co-pyrolysis of steel slag and orange peel and application thereof, and belongs to the technical field of catalytic materials. Biomass material is prepared by cleaning, drying, crushing and passing through a 100-mesh sieve, steel slag is prepared by crushing and passing through a 200-mesh sieve, the pretreated biomass powder and the steel slag powder are stirred and mixed according to different mass ratios, the obtained mixture is co-pyrolyzed at a high temperature of 600-900 DEG C, and then the co-pyrolysis product is cleaned, dried, ground and sieved to obtain a Fenton-like catalyst. The application uses cheap steel slag and orange peel as raw materials to prepare a composite material for a Fenton-like catalyst by co-pyrolysis, uses cheap orange peel as a modifier, strengthens the activation effect by introducing carbon material, fully utilizes beneficial components (such as metal oxides like iron oxides) in the steel slag, and fully improves the pore structure of the steel slag, so that a high-efficiency Fenton-like catalyst is prepared, and the purpose of treating waste with waste is achieved.

The application discloses a method for preparing bio-oil by co-pyrolysis of black liquor solids and waste plastics with Ni-Mo / HZSM-5 as a catalyst, and high-quality bio-oil is prepared by co-pyrolysis of black liquor solids and waste plastics with Ni-Mo / HZSM-5 as a catalyst. Research shows that the addition of plastics can significantly improve the yield of hydrocarbons. The total hydrocarbon of black liquor solids, black liquor solids and polypropylene, and black liquor solids and polyethylene increases by 6%, 78% and 45% respectively under the catalytic pyrolysis of Ni-Mo / HZSM-5, and waste plastics have a synergistic effect on the pyrolysis of black liquor solids. When black liquor solids and polyethylene are co-pyrolyzed, the yield of alkanes is the highest at 69.44% at a temperature of 650 DEG C. When black liquor solids and polypropylene are co-pyrolyzed, the yield of alkanes is the highest at 44.9% at a temperature of 550 DEG C. The obtained pyrolysis bio-oil is mainly composed of hydrocarbons, and is a kind of high-quality bio-oil.

The present application belongs to the technical field of catalyst preparation, and relates to a preparation method and application of a black and odorous water sludge-based carbon catalyst. The preparation method of the black and odorous water sludge-based carbon catalyst comprises the following steps: (1) mixing, drying and grinding black and odorous water sludge and non-sludge biomass materials to obtain carbon-increased sludge; and (2) activating the carbon-increased sludge with an activator, pyrolyzing and cooling the carbon-increased sludge in an inert atmosphere to obtain the black and odorous water sludge-based carbon catalyst. The present application improves the carbon content of sludge carbon, reduces the yield, ash content, conductivity and element ratios of H / C, N / C and O / C of sludge carbon by co-pyrolyzing black water sludge and non-sludge biomass materials. In addition, co-pyrolysis reduces the content and toxicity of heavy metals in biochar. Co-pyrolysis of black and odorous water sludge and non-sludge biomass materials rich in C elements not only simultaneously disposes the sludge and non-sludge biomass materials, but also improves the C element content of biochar, thereby improving the catalytic ozone activity of the biochar.

The invention discloses a catalyst for preparing low-carbon aromatic hydrocarbon through co-pyrolysis of coal and waste plastics and a preparation method thereof, and the catalyst is prepared according to the following steps: (1) pretreatment and surface modification of microporous USY, (2) preparation of USY-coated silica-alumina xerogel, (3) steam-assisted crystallization, and (4) template removal and post-treatment. According to the method, commercial micropore USY serves as a core, mesoporous USY deposited on the outer layer serves as a shell, active metal Ni and Ti are added, the mesoporous shell mainly plays a role in pre-cracking and transmission, super-molecules are pre-cracked on the surface, even if a small amount of carbon is deposited in a pore channel, the carbon deposition mainly occurs in a mesoporous channel, and therefore the performance of the catalyst is greatly improved. A key active center cannot be blocked, and deposited carbon in mesopores is easier to remove through scorching. A product generated by a catalyst core layer can also be quickly transferred to mesopores, so that excessive reaction is avoided, and the content of low-carbon aromatic hydrocarbon in a co-pyrolysis tar product is increased.

The invention discloses a coal and waste plastic co-pyrolysis catalyst Ni / Ce / Zr-(at) USY and a preparation method thereof, and the coal and waste plastic co-pyrolysis catalyst Ni / Ce / Zr-(at) USY is prepared according to the following steps: step (1) pretreatment and surface modification of microporous USY, step (2) USY surface seed crystallization, step (3) synthesis of precursor gel of a mesoporous USY shell layer, step (4) hydrothermal crystallization and shell layer growth, and step (5) post-treatment and activation. And (6) synthesizing Ni / Ce / Zr-(at) USY with a core-shell structure by using an ethanol impregnation method, firstly grafting a layer of seed crystal capable of inducing the growth of the mesoporous USY on the surface of the commercial USY, and then growing a USY shell layer with the mesoporous structure by taking the seed crystal as a core through a hydrothermal reaction under the help of a structure-directing agent (a template agent). The carbon deposition amount on the catalyst is reduced, the co-pyrolysis light oil content is improved, and the heavy oil content is reduced.

The invention provides a method for preparing aromatic hydrocarbon-rich bio-oil by adopting ZnCr2O4 / HZSM-5 to catalyze co-pyrolysis of biomass and waste tires, and belongs to the technical field of bio-oil preparation. The method comprises the following steps: mixing biomass and waste tires to obtain a mixed raw material; the preparation method comprises the following steps: mixing a ZnCr2O4 oxide and an HZSM-5 molecular sieve, and carrying out ball milling to obtain a ZnCr2O4 / HZSM-5 composite catalyst; and putting the mixed raw material into an upper temperature zone, putting the ZnCr2O4 / HZSM-5 composite catalyst into a lower temperature zone, and carrying out pyrolysis under inert gas to obtain the bio-oil after the pyrolysis is finished. According to the method, the ZnCr2O4 / HZSM-5 catalyst is applied to the co-pyrolysis process of the enzymatic hydrolysis lignin and the waste tires for the first time, and directional conversion from the waste to the aromatic hydrocarbon-rich bio-oil is realized through the synergistic catalytic effect of the ZnCr2O4 / HZSM-5 catalyst in the system.

The invention belongs to the technical field of nano catalytic materials, and particularly relates to a preparation method of a non-noble metal monatomic catalyst material containing an organochlorine structure, and the organochlorine structure is stably constructed by introducing alkali metal or alkaline earth metal salt of perchloric acid in the preparation process for co-pyrolysis. The catalyst prepared by the method has good ORR catalytic activity, and has low hydrogen peroxide yield and good cycle stability in an acidic medium. According to the invention, a structure taking non-metallic element chlorine as a core is innovatively proposed, and the activity of the catalyst is further improved while the stability of the catalyst is improved by modifying the original inactive structure while the active structure of the catalyst is not changed.

The application discloses a biomass and coal co-pyrolysis reactor, which comprises a reactor body, wherein the reactor body comprises a biomass pyrolysis cylinder and a coal pyrolysis cylinder which are communicated with each other, the biomass pyrolysis cylinder is connected below the coal pyrolysis cylinder, the cross-sectional area of the biomass pyrolysis cylinder is smaller than that of the coal pyrolysis cylinder, the bottom of the biomass pyrolysis cylinder is provided with a lifting gas inlet, the gas generated by the coal pyrolysis is suitable to enter the reactor body through the lifting gas inlet, the top of the coal pyrolysis cylinder is provided with a product outlet, at least one biomass feeding port is arranged on the side wall of the biomass pyrolysis cylinder, at least one coal feeding port is arranged on the side wall of the coal pyrolysis cylinder, and a plurality of heat accumulating radiation pipes are arranged in the biomass pyrolysis cylinder and the coal pyrolysis cylinder in a spaced mode. According to the biomass and coal co-pyrolysis reactor, hydrogen in the biomass can be easily transferred to the oil gas in the coal pyrolysis cylinder, and the biomass and the coal pyrolysis can reach a synergistic effect.

This invention discloses a system for producing biochar by smoking biomass until it is thermally decomposed. [Solution] The system includes a smoker and a pyrolysis furnace, the smoker including a first outlet, a first intake, and a first exhaust, and a pyrolysis chamber provided in the pyrolysis furnace, the pyrolysis chamber including a feed port, a second outlet, and a second exhaust port, where the feed port communicates with the first outlet and the second exhaust port communicates with the first intake. Thus, the present invention promotes the direct condensation and adhesion of condensable volatiles in the pyrolysis gas to the biomass by constantly using the pyrolysis gas to smoke the biomass, and then improves the yield and carbon retention rate of biochar through the co-thermolysis of bio oil and biomass, thereby sealing more carbon elements into the biochar and achieving the effect of carbon fixation.

The utility model provides a kind of screening device for coal gangue and organic waste co-pyrolysis, including support frame and two screening cylinders being symmetrically fixed on support frame, two screening cylinders are conical structure, one partition is equipped between two described screening cylinders, and conical cylinder screen is respectively equipped in two described screening cylinders, two screening cylinders are respectively provided with material conveying mechanism on two sides of facing away, two described material conveying mechanism is respectively provided with feed hopper, two described material conveying mechanism is fixed with rotating shaft between, rotating shaft of the partition two sides is respectively equipped with multiple groups of breaking hammer and multiple groups of cutter, two described screening cylinder lower surface is communicated with material discharge hopper, and two described screening cylinder is respectively communicated with waste discharge hopper on material conveying mechanism side;The screening device is finely screened fine particle and secondary crushing is carried out to large particle, so that coal gangue and organic waste reach co-pyrolysis requirement, so that it is fully contacted and improves pyrolysis efficiency.

The invention discloses a method for preparing aliphatic hydrocarbon through co-pyrolysis of a photovoltaic module laminated part waste ethylene-vinyl acetate copolymer and a waste polyolefin elastomer. Physical and chemical complementation and free radical synergy of the ethylene-vinyl acetate copolymer and the polyolefin elastomer in the pyrolysis process are utilized; compared with independent pyrolysis, hydrogen transfer and deoxidation in co-pyrolysis have a synergistic effect, so that the selectivity and yield of aliphatic hydrocarbon are improved, generation of acidic oxygen-containing components and aromatics caused by deacetic acid is remarkably reduced, a liquid product is mainly composed of aliphatic hydrocarbon, carbon chain distribution is directionally concentrated to a short chain range, and meanwhile, tail gas corrosivity and post-treatment load are reduced. The solid carbon generated in the reaction process has a certain microporous structure and can be used as an adsorbent, an electrode material or a carbon-based fertilizer carrier, so that clean treatment and resource utilization of organic components of the retired photovoltaic module are realized.

The application discloses a preparation method of a composite activated co-pyrolysis biochar and application thereof, and belongs to the field of adsorbent treatment of heavy metal pollution. The preparation method of the co-pyrolysis biochar comprises the following steps: taking original biomass as raw material, cleaning, drying, crushing, sieving, mixing and impregnating the original biomass after drying with magnesium fluosilicate and diethylamine phosphate solution, and then preparing the co-pyrolysis biochar through limited oxygen slow pyrolysis after suction filtration and drying. The application utilizes the biochar to prepare a cheap, green and efficient heavy metal adsorbent, selects heavy metal lead as a research object, and removes lead in water bodies efficiently and at low cost. The method is simple and easy to implement, low in cost, and suitable for popularization and use.