72 results about "Hydrothermal liquefaction" patented technology

The invention discloses a resource utilization method of Fenton iron mud. According to the method, a citric acid-ascorbic acid composite solution is used for soaking Fenton iron mud, hydrothermal liquefaction is carried out in an inert reduction system, ferric iron is reduced into ferrous iron, and a ferrous iron solution generated after reaction can directly form a Fenton reagent with hydrogen peroxide to be reused for Fenton reaction. By the adoption of the method, iron can be completely recycled, resource utilization of the Fenton iron mud is facilitated, the mass of the treated filter residues is only 1 / 10 of that of the iron mud, and the disposal amount of hazardous waste is effectively reduced.

The embodiment of the application discloses a nitrogen content prediction method, a program product, an equipment and a storage medium, comprising: obtaining experimental data of each biomass raw material under each hydrothermal liquefaction reaction condition, and constructing a data set according to the experimental data; performing cluster analysis on the data set based on the element composition of the raw material and the organic composition of the raw material to obtain each sub-data set corresponding to the data set; performing data enhancement on each sub-data set according to a predetermined random disturbance to obtain each enhanced sub-data set, and determining a model training data set according to each enhanced sub-data set; training a predetermined initial nitrogen migration and conversion prediction model based on the model training data set to obtain a target nitrogen migration and conversion prediction model. The application constructs a nitrogen migration and conversion prediction model suitable for small sample and high heterogeneity data conditions. The prediction accuracy and generalization ability of the target nitrogen migration and conversion prediction model are improved.

The invention relates to a paper-plastic-aluminum packaging waste resource utilization system and method.The system comprises a water supply unit, a material pretreatment unit, a reactor, an electromagnetic induction heater and a three-phase separator, the water supply unit is connected with the reactor, and the material pretreatment unit is connected with a feeding port of the reactor; a condensing coil is arranged in the reactor and is communicated with a water supply unit to form a cooling water supply loop; the electromagnetic induction heater is arranged at the middle lower part of the reactor; and a feed port of the three-phase separator is connected with a discharge port of the reactor. According to the system, the paper-plastic-aluminum packaging waste is treated by utilizing a hydrothermal liquefaction method, so that in-situ online synthesis of high-quality bio-oil is realized, and hydrated alumina with high additional value is recycled; the resource utilization efficiency is obviously improved while the energy consumption and the pollution emission are reduced. The method is green and environment-friendly, the use of an organic solvent or a high-acidity separating agent in a traditional recovery method is avoided, and secondary pollution is reduced; the by-product hydrogen can be used as clean energy, and carbon emission is reduced.

The present disclosure relates to a continuous biomass hydrothermal liquefaction reaction intelligent control method and system, comprising: real-time monitoring of biomass feed solid content and feed flow rate by mass flow meter, dynamic adjustment of feed flow rate by feed pump frequency converter combined with pre-input material characteristic parameters, control of reaction residence time; based on real-time sampling data and feed flow rate, dynamic adjustment of reaction temperature and reaction pressure by prediction model, and adjustment of discharge valve opening to optimize reaction residence time; real-time monitoring of flow rate, regulating valve opening, separation temperature, separation pressure and liquid level of gas-liquid separation buffer tank and solid-liquid separation buffer tank, automatic adjustment of regulating valve opening according to separation pressure of gas-liquid separation buffer tank and solid-liquid separation buffer tank, and staged recovery of heat by three-stage cooler; judging whether the current key parameters exceed the warning value, if yes, triggering an emergency alarm signal and emergency process. The present disclosure improves the intelligence and safety of the continuous biomass hydrothermal liquefaction reaction process.

Systems and methods of producing biocrude oil include a well having a depth, a top positioned at surface, a bottom portion positioned at a subterranean location, the well comprising casing and tubing positioned therein, forming an annulus. The casing and tubing define a hydrothermal liquefaction (HTL) reaction zone in a bottom portion of the well and a heat transfer and separation zone above the HTL reaction zone. The well includes a cable having an electric heating element positioned in the tubing in the HTL reaction zone configured to transfer energy to biomass slurry flowing through the tubing, converting some of the biomass slurry into biocrude oil by HTL. The well depth and the electrical heating element are sized to produce temperature and pressure in the HTL reaction zone sufficient to form sub-critical water and produce a product fluid comprising the biocrude oil.

The present application relates to the technical fields of hydrothermal liquefaction, and discloses an electrode reaction kettle, which comprises a reaction kettle cavity, a drain port arranged at the bottom of the reaction kettle cavity, a cavity cover arranged at the top of the reaction kettle cavity, and a feed inlet, a liquid inlet, an air inlet and an exhaust port arranged on the cavity cover; and a plasma device fixed to the reaction kettle cavity and / or the cavity cover, which is used to discharge electricity into the reaction kettle cavity to generate plasma. The present application does not involve the use of catalysts, is green and environmentally friendly, and is used for plastic degradation without involving the use of a large amount of catalysts, thus avoiding the phenomenon of subsequent separation and purification difficulties. The electrode reaction kettle can realize the plasma electrolytic degradation of plastics, and the operation process is simple and suitable for industrial production.

The invention relates to the technical field of biomass energy conversion, in particular to a continuous biomass hydrothermal liquefaction reaction pressure stabilization control method and system. The method comprises the following steps: judging based on an actual pressure value in the reaction component and a target threshold value, and executing a corresponding control strategy to ensure that the reaction is carried out in a stable pressure environment. Check valves are arranged in the gas inlet link and the feeding link, dampers are arranged in the feeding link and the discharging link, a back pressure valve is arranged at the discharging end, and meanwhile a timer and an opening feedback adjusting device are arranged for a discharging valve, so that stable pressure control in the continuous biomass hydrothermal liquefaction reaction process is achieved. The pressure fluctuation in the reaction process can be effectively coped with, it is guaranteed that the reaction is conducted in a stable pressure environment, the biomass conversion efficiency and the product quality are improved, and the device has the advantages of being simple in structure, accurate in control, high in automation degree and the like.

This invention discloses a method for preparing a composite flotation reagent using biomass hydrothermal liquefaction products, comprising the following steps: Raw material preparation: providing biomass raw materials rich in lipids or proteins; Catalytic hydrothermal liquefaction: placing the biomass raw materials and a composite catalyst in a reactor, reacting at a temperature of 250-350℃ and a pressure of 4-20 MPa, wherein the water content of the biomass raw materials is 70-95%, and the composite catalyst contains alkaline components, metal oxide components, and rare earth element components; Product separation: separating the reaction products into oil and water to obtain bio-crude oil containing amphiphilic molecules; Flotation application: applying the bio-crude oil as a composite flotation reagent to mineral flotation, where the bio-crude oil simultaneously functions as a frother and a collector. This invention uses waste biomass as raw material to prepare a composite flotation reagent with both frother and collector functions, realizing the resource utilization of waste and the green upgrading of flotation reagents, and has the characteristics of wide raw material sources, excellent reagent performance, and environmental friendliness.

The invention discloses a net zero-carbon solar-driven high-quality bio-fuel oil production system, and relates to the technical field of biomass energy conversion. The system comprises: a hydrothermal liquefaction reactor for a hydrothermal liquefaction reaction of biomass; the photovoltaic electric heating device is used for heating the reactor; the solar molten salt device is used for heat preservation of the reactor; the waste heat recovery device is connected with an outlet of the reactor to recover waste heat; the separation device is connected with an outlet of the waste heat recovery device and used for separating biological crude oil and organic wastewater; the biological hydrogen production device is used for producing hydrogen by utilizing wastewater photosynthesis; the hydrogenation upgrading device is used for producing biological fuel oil by using biological crude oil and hydrogen; and the controller is in communication connection with each device. Through solar heat supply and photosynthetic biological hydrogen production, dual dependence on fossil energy is avoided, and net zero carbon emission of a high-quality biofuel production whole chain is achieved.

A waste stream of organic matter such as sewage, plant and plastic matter is received for recycling and treated with high temperature and pressure to generate useful organic products such as bio-oil and gas. Byproducts such as char and an aqueous phase including water can be selectively recycled or beingly discarded. An oxidant added to a reactor containing waste from the waste stream facilitates an autothermal reaction under the temperature and pressure applied to the reactor, boosting the temperature slightly from the reactions therein. The reactor generates useful hydrocarbons such as bio-oil resulting from disruption of organic bonds. A combination of oxidation and radical initiation results from the oxidant and / or radical initiators, and provides an increased yield of bio-oil and substantially pure aqueous phase. A stoichiometric quantity of the oxidant limits complete conversion of carbon into carbon dioxide by limiting available oxygen and therefore favoring hydrocarbon formation.

Aqueous wastewater from hydrothermal liquefaction (HTL) systems is typically high in chemical oxygen demand (COD), which renders classic aerobic wastewater treatment to be prohibitively expensive. HTL wastewater can be processed using thermochemical wet oxidation in a manner that is not only cost efficient but also contributes more heat than is required for the energetically demanding HTL process. Provided are methods and devices for integrated hydrothermal liquefaction of biomass and treatment of resulting wastewater.

The present invention provides an improved hydrothermal liquefaction process for managing and sequestering PFAS contaminants in waste materials.

The invention discloses continuous hydrothermal liquefaction treatment integrated equipment and method for organic solid waste, the continuous hydrothermal liquefaction treatment integrated equipment comprises an equipment main body, the equipment main body comprises a preheating section, a reaction section and a heat regeneration section, the reaction section is communicated with the heat regeneration section, and the preheating section is communicated with the heat regeneration section through a heat exchange device; a first stirring device is arranged at the bottom of the heat regeneration section and connected with a slag discharging device and a feeding pipeline. A stirring motor is arranged at the top of the reaction section, and is connected with a stirring shaft extending to a deslagging device in the reaction section; the reaction section is provided with a second stirring device, a heating device is arranged on the periphery of the pipe wall of the reaction section, and the first stirring device and the second stirring device are both fixed to the stirring shaft. The preheating section, the reaction section and the heat regeneration section are integrated, the material transfer waiting time of traditional intermittent treatment is avoided, the treatment efficiency of the organic solid waste is improved, waste heat of the reacted material can be recycled to the preheating section to preheat the to-be-treated material, and the energy consumption of a heating device of the reaction section is reduced.

This invention belongs to the field of hydrothermal liquefaction technology and discloses a method for CO2-promoted hydrothermal liquefaction demulsification and separation of rolling mill sludge. The method involves weighing rolling mill sludge into a high-pressure reactor, adding water, and introducing sufficient carbon dioxide gas to purge air from the reactor. A hydrothermal liquefaction reaction is then carried out, and the liquid phase product in the high-pressure reactor is collected and washed with acetone. The washing liquid and the liquid phase product in the high-pressure reactor are then vacuum filtered together. After washing the filter residue with acetone, a filtrate and a filter residue are obtained. The filter residue is dried to obtain the solid phase product of the reaction. Dichloromethane is added to the filtrate, and after thorough stirring and extraction, the liquid is separated. The upper layer is an aqueous solution, and the lower layer is a mixed solution of acetone, dichloromethane, and bio-oil. Rotary evaporation is used to remove the organic solvent from the oil phase mixture, yielding the oil phase. This invention improves the oil phase separation efficiency and calorific value of rolling mill sludge by using CO2 as a reaction atmosphere during the hydrothermal liquefaction process.

The invention provides a method for modifying thickened oil by utilizing a biomass hydrothermal liquefaction water-phase byproduct, and relates to the technical field of petroleum processing. The method provided by the invention comprises the following steps: mixing the biomass hydrothermal liquefaction water-phase byproduct and the thickened oil to form a reaction system, and carrying out hydrothermal cracking reaction to obtain the modified oil, the mass ratio of the biomass hydrothermal liquefaction water-phase byproduct to the thickened oil is (3-8): 10, the hydrothermal cracking reaction temperature is 200-320 DEG C, and the hydrothermal cracking reaction time is 6-30 hours. The hydrothermal liquefaction water-phase byproduct is used as a conversion water source for the hydrothermal cracking reaction of the thickened oil, active hydrogen upgrading is provided for the modification of the thickened oil, the viscosity reduction and modification of the thickened oil are realized, meanwhile, the treatment cost of wastewater generated when the target product bio-oil is prepared through the hydrothermal liquefaction reaction of the biomass is reduced, and the economic benefit is improved.

Provided is a method for producing an oil comprising feeding an olefin-based resin into a reactor, converting the olefin-based resin into an oil by thermal degradation reaction, and recovering the produced oil, wherein the olefin-based resin is a low molecular weight (LMW) olefin-based resin. The LMW olefin-based resin comprises a molecular weight of less than 50,000 g / mol, preferably less than 40,000 g / mol measured according to ISO 16014-4. In an embodiment, method comprises a further step of cracking a higher molecular weight (HMW) olefin-based resin to produce the LMW olefin-based resin. Also provided are an oil produced according to the method and a use of the oil for as a feedstock for production of olefin-based resins. In the examples, a Hydrothermal liquefaction (HTL) process, which uses super-critical water as reaction media, is used for the thermal degradation reaction.

A hydrothermal liquefaction (HTL) reactor system can comprise a biomass slurry source, a mixing vessel, a pump, a HTL reactor section, a pressure letdown valve, and a vapor-liquid disengagement vessel. The mixing vessel can mix a biomass slurry stream received from the biomass slurry source with a vaporized water and gas byproducts stream. The pump can pressurize a biomass slurry stream received from the mixing vessel. The HTL reactor section can produce a product mixture stream from a biomass slurry stream received from the pump. The pressure letdown valve can reduce the pressure of a product mixture stream received from the HTL reactor section. The vapor-liquid disengagement vessel can separate vaporized water and gas byproducts from a product mixture stream received from the pressure letdown valve, wherein the separated vaporized water and gas byproducts can form the vaporized water and gas byproducts stream received by the mixing vessel.

The present invention relates to a method for treating a feedstock by hydrothermal liquefaction to reduce its mineral content, wherein: - step (a): diluting bio-crude oil with a diluent (8, 12) comprising an organic liquid phase to obtain diluted bio-crude oil (9); - step (b): contacting the diluted bio-crude oil (9) obtained in step (a) with two separate solvents in separate contact zones (3; 7) comprising a first solvent (3) (which is an aqueous liquid phase having a neutral pH) and a second solvent (10) (which is an acidic aqueous liquid phase) using countercurrent liquid-liquid extraction to obtain a raffinate (5) comprising a mineral-poor feedstock and a diluent feedstock, and an extract (4) comprising a solvent rich in mineral compounds; - step (c): separating the raffinate (5) obtained in step (b) to obtain a bio-crude oil (11) comprising mineral compounds and a phase comprising the diluent (8, 12).

The use of renewable energy to reduce fossil fuel consumption is a key strategy to mitigate pollution and climate change, resulting in the growing demand for new sources. Fast-growing proprietary cyanobacterial strains of Fremyella diplosiphon with an average life cycle of 7-10 days, and a proven capacity to generate lipids for biofuel production were studied. We investigated the growth and photosynthetic pigmentation of a cyanobacterial strain (SF33) in both greenhouse and outdoor bioreactors and produced biocrude via hydrothermal liquefaction. The cultivation of F. diplosiphon did not significantly differ under suboptimal conditions (p<0.05), including in outdoor bioreactors with growth differences of less than 0.04 (p=0.035) among various batches. An analysis of the biocrude's components revealed the presence of fatty acid biodiesel precursors such as palmitic acid and behenic acid, and alkanes such as hexadecane and heptadecane, used as biofuel additives. In addition, the quantification of value-added photosynthetic pigments revealed chlorophyll a and phycocyanin concentrations of 0.0011±5.83×10−5 μg / μL and 7.051±0.067 μg / μg chlorophyll a. Our results suggest the potential of F. diplosiphon as a robust species that can grow at varying temperatures ranging from 13° C. to 32° C., while producing compounds for applications ranging from biofuel to nutritional supplements. This paves the way for production-level scale-up and processing of F. diplosiphon-derived biofuels and marketable bioproducts. Fuel produced using this technology will be eco-friendly and cost-effective and will make full use of the geographical location of regions with access to brackish waters.

The invention relates to the technical field of biomass resource utilization, and discloses a multi-modal fusion feeding device for continuous hydrothermal liquefaction, which comprises a pretreatment and supply unit for mixing a biomass raw material with water to form slurry; a feeding hole of the active cyclone centrifugal separation unit is connected with the pretreatment and feeding unit, and the active cyclone centrifugal separation unit is used for receiving the slurry and separating the slurry into solid-containing underflow and purified overflow under a centrifugal force field. According to the multi-mode fusion feeding device and method for continuous hydrothermal liquefaction, an active rotational flow centrifugal separation unit is adopted to replace traditional gravity sedimentation, solid particles are efficiently separated through centrifugal force, the separation state is mastered in real time through ultrasonic monitoring, and the depth of an overflow pipe is dynamically adjusted through an intelligent controller. According to the mode, fine particles and light fibers which are difficult to treat in a traditional method are effectively removed, meanwhile, solids are continuously discharged along with underflow, accumulation and shutdown cleaning are avoided, and efficient and continuous slurry purification is achieved.

The invention relates to a method for preparing hydrocarbon-rich bio-oil through biomass non-catalytic hydrothermal liquefaction. The method comprises the following steps: sequentially carrying out hydrothermal liquefaction treatment and solid-liquid separation treatment on biomass to obtain the hydrocarbon-rich bio-oil, the hydrothermal liquefaction treatment comprises heat treatment, pulse pressure treatment, pressure reduction treatment and cooling treatment which are carried out in sequence; the pulse pressure treatment comprises first pulse pressure treatment, second pulse pressure treatment and third pulse pressure treatment in sequence; the target pressure of the first pulse pressure treatment is greater than the target pressure of the second pulse pressure treatment; the target pressure of the third pulse pressure treatment is greater than the target pressure of the first pulse pressure treatment. According to the method, the hydrothermal liquefaction treatment process is regulated and controlled, the content of hydrocarbon compounds in the hydrocarbon-rich bio-oil is increased, and meanwhile, the method is simple and easy to amplify and does not need to use a catalyst.

Provided is a method for preparing a transportation fuel from a hydrothermal liquefaction produced bio-crude oil. A hydrothermal liquefaction produced bio-crude oil is subjected to distillation to obtain a purified bio-oil and a distillation residue; the purified bio-oil is subjected to hydrocracking to obtain a cracked bio-oil; the cracked bio-oil is subjected to catalytic hydrogenation to obtain a refined bio-oil; and the refined bio-oil is subjected to fractionation to obtain a transportation fuel.

The invention relates to a nickel-based catalyst for preparing hydrocarbon-rich bio-oil through hydrothermal liquefaction and a preparation method of the nickel-based catalyst. The nickel-based catalyst comprises a carrier and a nickel-containing active component loaded on the carrier, the carrier comprises a molecular sieve and biomass charcoal; the nickel-containing active component comprises metallic nickel and a nickel oxide layer formed on the surface of the metallic nickel. According to the nickel-based catalyst provided by the invention, the molecular sieve and the biomass charcoal are used as carriers, the active components of the nickel-based catalyst not only comprise metallic nickel, but also comprise the nickel oxide layer formed on the surface of the metallic nickel, and the nickel oxide layer can remarkably improve the catalytic durability of the nickel-based catalyst; finally, the nickel-based catalyst has good stability and catalytic activity when the hydrocarbon-rich bio-oil is prepared through high-pressure hydrothermal liquefaction, so that the content of hydrocarbon compounds in the hydrocarbon-rich bio-oil is increased.

The invention relates to a continuous biomass hydrothermal liquefaction reaction intelligent control method and system, and the method comprises the steps: monitoring the feed solid content and feed flow of biomass in real time through a mass flowmeter, dynamically adjusting the feed flow through a feed pump frequency converter in combination with pre-input material characteristic parameters, and controlling the reaction retention time; based on the real-time sampling data and the feeding flow, the reaction temperature and the reaction pressure are dynamically adjusted through the prediction model, and the opening degree of a discharging valve is adjusted to optimize the reaction residence time; the flow, the opening degree of a regulating valve, the separation temperature, the separation pressure and the liquid level of the gas-liquid separation buffer tank and the solid-liquid separation buffer tank are monitored in real time, the opening degree of the regulating valve is automatically regulated according to the separation pressure of the gas-liquid separation buffer tank and the solid-liquid separation buffer tank, and heat is recovered in a graded mode through a three-stage cooler; and judging whether the current key parameter exceeds an early warning value or not, and if so, triggering an emergency alarm signal and an emergency process. According to the invention, the intelligence and safety of the biomass continuous hydrothermal liquefaction reaction process are improved.

The present application relates to a kind of paper plastic aluminum packaging waste resource utilization system and method, its system includes water supply unit, material pretreatment unit, reactor, electromagnetic induction heater and three-phase separator, wherein water supply unit is connected with reactor, material pretreatment unit is connected with the feed inlet of reactor, condensing coil is arranged in the interior of reactor and is connected with water supply unit to form cooling water supply circuit, electromagnetic induction heater is arranged in the middle and lower part of reactor;The feed inlet of three-phase separator is connected with the discharge port of reactor.The system uses hydrothermal liquefaction method to process paper plastic aluminum packaging waste, realizes the in-situ online synthesis of high-quality bio-oil, and recycles high-value-added hydrated alumina;While reducing energy consumption and pollution emissions, resource utilization efficiency is significantly improved.The present application is green and environmentally friendly, avoids the use of organic solvents or high-acidity separating agent in traditional recycling methods, reduces secondary pollution;By-product hydrogen can be used as clean energy, and carbon emissions are reduced.

The application discloses a recycling method of tobacco waste powder extraction waste residue, comprising the following operation steps: S1, first, tobacco essential oil is extracted from tobacco waste powder by using a supercritical carbon dioxide extraction method, and extraction waste residue is collected; S2, the collected extraction waste residue is mixed with an alkaline solution, and then poured into a high-pressure reaction kettle to perform a hydrothermal carbonization reaction; S3, after the reaction kettle returns to a normal temperature and pressure state, the product in the reaction kettle is poured out and filtered and dried, the obtained solid product is biochar, and the liquid product is collected and stored in a specific anaerobic cool environment for a period of time, and then organic fertilizer is obtained. The method can realize effective recycling of tobacco waste by using hydrothermal liquefaction to process the waste residue after supercritical extraction of the tobacco waste powder.

The invention discloses a blue leather scurf recovery treatment method and system, a complete'pretreatment-hydrothermal conversion-precise separation-product conversion 'is constructed, chromium is removed through front-end pretreatment, meanwhile, the quality of product bio-oil obtained after hydrothermal liquefaction is improved, waste gas is discharged after reaching the standard after being subjected to high-temperature combustion treatment, secondary pollution is avoided, and the blue leather scurf recovery treatment method and system are suitable for industrial production. According to the method, slurry is subjected to multi-stage thermal reaction, four-phase products are generated, the reaction efficiency is improved, the four-phase products are separated, bio-oil, chromium slag, a water-phase product and combustible gas are obtained, reactants are sequentially treated to achieve different purposes, secondary pollution to the outside can be reduced, the energy utilization efficiency can be improved, and the method is suitable for industrial production. According to the method, synergistic improvement of environmental benefits and economic benefits is achieved, and an optimal solution is provided for resourceful treatment of the blue leather scrap waste.

The present technology integrates multiple technologies to substantially reduce the economic and environmental cost of managing municipal solid waste (MSW) and the biomass growth in forests or rangelands. The technology employs rotary kiln gasification of MSW to generate steam, renewable electrical energy, and an inorganic sintered ash suitable for a variety of uses. Net electrical power from the power plant is used to operate a pyrolysis system or a hydrothermal liquefaction unit that converts wood biomass to liquid hydrocarbon fuels. A carbon capture and utilization system uses CO2 recovered from the power plant exhaust stack to generate a variety of fuels and / or specialty chemicals. Steam from the power plant is used to make activated carbon from the char residue from pyrolysis. Revenue from the technology includes gate fees for MSW diverted from landfill, renewable electrical power to the grid, a variety of liquid hydrocarbon fuels and activated carbon.

The disclosure relates to processes of combining algae and waste feedstocks comprising digestate or food waste for the production of bio-oil via hydrothermal liquefaction. The disclosure further relates to bio-oil and sustainable fuels such as sustainable aviation fuel derived from said processes, as well as systems for producing bio-oil.