3610results about "Special form destructive distillation" patented technology

A process for upgrading plastic derived oil includes contacting the plastic derived oil with a mixed catalyst in a first reactor, where the mixed catalyst includes a decontamination catalyst and a cracking catalyst different from the decontamination catalyst. The first reactor reduces concentrations of halogen-containing compounds in the plastic derived oil. The process includes passing the first reactor effluent to a second reactor and contacting the first reactor effluent with the cracking catalyst to produce a second effluent comprising light olefins and naphtha range hydrocarbons. The process includes separating used mixed catalyst from the first reactor to produce a used decontamination catalyst and a second used cracking catalyst, and regenerating the decontamination catalyst and cracking catalyst in separate regenerators to reduce exposure of the cracking catalyst to halogen-containing compounds produced during regeneration of the used decontamination catalyst.

A method for pyrolysis of a mass of waste material, includes: providing a screw arrangement adapted to supply heat to the mass by mechanical shear; providing a reactor after the screw arrangement, adapted to supply heat to the mass in the absence of oxygen by heating the reactor wall; heating the mass to an exit temperature and increasing the pressure to an exit pressure in the screw arrangement; thermally degrading the mass in the reactor. The mass is brought into an extreme condition at the exit temperature and exit pressure by the screw arrangement, such that during the pressure drop pyrolysis occurs, thereby forming gaseous hydrocarbons within the connecting element.

A process for upgrading plastic derived oil includes contacting a plastic derived oil stream with a decontamination catalyst in a first reactor, separating a first reactor effluent from a used decontamination catalyst, passing the first reactor effluent to a second reactor downstream of the first reactor, contacting the first reactor effluent with a cracking catalyst in the second reactor, and separating a second reactor effluent from a used cracking catalyst. The cracking catalyst is different from the decontamination catalyst. The process further includes regenerating the used decontamination catalyst in a decontamination catalyst regenerator to produce regenerated decontamination catalyst, and regenerating the used cracking catalyst in a cracking catalyst regenerator separate from the decontamination catalyst regenerator to produce regenerated cracking catalyst. Regenerating the used cracking catalyst separately reduces deactivation of the cracking catalyst by halogen-containing compounds produced during regeneration of the decontamination catalyst.

Methods and systems for coking coal blends to produce foundry coke products are disclosed herein. Methods for producing coke products can include charging a coal blend into a coke oven; and heating the charged coal blend such that a crown temperature of the coke oven is greater than a lower bound coking temperature. The pyrolysis duration begins when the crown temperature of the oven is greater than the lower bound coking temperature, and ends when the crown temperature of the oven is less than the lower bound coking temperature.

The invention discloses a large-scale pig breeding wastewater purification treatment system, and relates to the technical field of wastewater treatment.The large-scale pig breeding wastewater purification treatment system is characterized in that the ion concentration of anaerobic liquid is monitored through a multi-ion sensing array, and a multi-channel feeding system is controlled to synthesize customized struvite compound fertilizer; the AI prediction control unit predicts the optimal medicament dosage and realizes millisecond-level closed-loop regulation; the multi-dimensional synergistic biochemical treatment module comprises an A / O biochemical treatment unit and an electric field enhanced anaerobic ammonia oxidation reactor, the electric field enhanced anaerobic ammonia oxidation reactor applies a direct-current electric field through an electrode pair, and engineering conductive biochar is used as a carrier to accelerate microbial metabolism; the sludge low-temperature pyrolysis self-consistent circulation module is used for pyrolyzing and converting residual sludge into biochar, biofuel and wood vinegar, and the biochar activation treatment unit is used for preparing engineering conductive biochar and forming a substance closed loop through a self-consistent circulation conveying system; and the digital twinning intelligent management and control platform realizes intelligent management and control of the system.

According to the invention, biomass rice hull ash and a sodium hydroxide solution are reacted to obtain water glass and carbon mud. And reacting the water glass with CO2 generated by calcining the limestone to produce a white carbon black product and a mixed waste liquid of sodium carbonate and sodium bicarbonate. Meanwhile, quick lime obtained by calcining limestone is digested and then reacts with sodium carbonate and sodium bicarbonate mixed waste liquid to generate a light calcium carbonate product and dilute sodium hydroxide waste liquid. And finally, the dilute sodium hydroxide waste liquid is concentrated and reused for water glass production, so that the waste liquid is recycled, and a complete process closed loop is formed. According to the process method disclosed by the invention, two leading-edge innovative processes, namely production of white carbon black by renewable resource biomass rice hull ash and production of white carbon black by a carbonization method, are organically combined and are coupled with production of light calcium carbonate by a limestone calcination process, so that the problem that a large amount of sodium sulfate-containing wastewater is discharged in a traditional process is solved; meanwhile, the carbon footprint of white carbon black and calcium carbonate products is greatly reduced.

The invention discloses an optimal control method for a straw pyrolysis carbonization process. The method comprises: performing multipoint temperature real-time acquisition and data processing on a carbonization zone of a carbonization furnace, obtaining temperature information and calculating a deviation from a preset ideal temperature curve (S01); dynamically adjusting an operating parameter of the combustion zone using a control algorithm based on the temperature deviation (S02); performing on-line monitoring on the flue gas components (S03); and regulating and controlling the return air flow and the secondary air supply amount of the combustion area in a linkage manner according to the flue gas monitoring result so as to optimize combustion and energy recovery (S04). Through accurate and intelligent process control, efficient, environment-friendly and high-valued utilization of the straw carbonization process is realized.

Disclosed herein are methods for pyrolysis of plastic feedstock comprising post-consumer and / or post-industrial plastics. In various implementations, the methods include directing the plastic feedstock into an internal volume of a reactor vessel, and pyrolyzing the plastic feedstock in the internal volume of the reactor vessel.

Chemical recycling facilities for processing mixed plastic waste are provided herein. Such facilities have the capability of processing mixed plastic waste streams and utilize a variety of recycling facilities, such as, for example, solvolysis facility, a pyrolysis facility, a cracker facility, a partial oxidation gasification facility, an energy generation / energy production facility, and a solidification facility. Streams from one or more of these individual facilities may be used as feed to one or more of the other facilities, thereby maximizing recovery of valuable chemical components and minimizing unusable waste streams.

Disclosed herein are reactors for pyrolysis of plastic feedstock comprising post-consumer and / or post-industrial plastics. In various implementations, the reactors include a reactor vessel, and one or more heaters configured for heating the feedstock in the reactor vessel's internal volume.

Disclosed herein are reactors for pyrolysis of plastic feedstock comprising post-consumer and / or post-industrial plastics. In various implementations, the reactors include a reactor vessel, and one or more heaters configured for heating the feedstock in the reactor vessel's internal volume.

Disclosed herein are reactors for pyrolysis of plastic feedstock comprising post-consumer and / or post-industrial plastics. In various implementations, the reactors include a reactor vessel for receiving and pyrolyzing the plastic feedstock, and one or more heaters for heating the feedstock in the reactor vessel's internal volume.

The invention provides a pyrolysis recovery method of a plastic packaging bag, and belongs to the technical field of plastic packaging bag recovery, the pyrolysis recovery method of the plastic packaging bag comprises the following steps: removing impurities from the waste plastic packaging bag, cleaning and drying, and controlling the moisture to be below 5%; the packaging bag is crushed into small blocks with the diameter smaller than 20 mm, so that the pyrolysis efficiency is improved; feeding the crushed plastic into a pyrolyzing furnace through a spiral feeder, adding an auxiliary pyrolyzing component, heating to 300-600 DEG C under an oxygen-free or oxygen-deficient condition, and carrying out thermal cracking; oil gas obtained after pyrolysis is condensed through a cooling system and classified, and solid residues are subjected to tempering treatment; flue gas generated after combustion is subjected to high-temperature degradation through a secondary combustion chamber and then subjected to multistage treatment through a quench tower, dust removal, alkali spraying and activated carbon adsorption, and it is ensured that the flue gas reaches the standard and is discharged; the problems that in the existing pyrolysis recycling process of the plastic packaging bags, the treatment efficiency is low, and the environment is still polluted can be solved.

Disclosed herein are methods for pyrolysis of plastic feedstock comprising post-consumer and / or post-industrial plastics. In various implementations, the methods include directing the plastic feedstock into an internal volume of a reactor vessel, and pyrolyzing the plastic feedstock in the internal volume of the reactor vessel.

The present invention relates to multi-layered pyrolysis reactor for the heat treatment of a rubber granulate. The multi-layered pyrolysis reactor has a pyrolysis zone and a gasification.

The invention provides phosphorus-doped hydrothermal synchronously-activated hierarchical pore green biochar, a preparation method thereof and application of the phosphorus-doped hydrothermal synchronously-activated hierarchical pore green biochar in formaldehyde adsorption, and belongs to the technical field of biomass resource high-value utilization and air pollution control. The preparation method comprises the following steps: mixing a biomass raw material with a phosphoric acid catalyst, carrying out hydrothermal carbonization reaction, carrying out solid-liquid separation on a reaction product after the reaction is finished, collecting a solid-phase material, drying, mixing with potassium hydroxide, activating, washing and drying the obtained product, and thus obtaining the phosphorus-doped hydrothermal synchronously-activated hierarchical porous green charcoal. Phosphoric acid is introduced in the hydrothermal stage to serve as a structure-directing agent and a doping source, uniform doping of phosphorus and coordinated regulation and control of a pore structure are achieved, a hierarchical pore channel system is formed in the subsequent activation process, and the physical adsorption and chemical fixation capacity of the biochar to formaldehyde molecules is greatly improved.

The invention discloses a device and method for preparing biochar from corncobs, and belongs to the technical field of biochar preparation, the device comprises a machine base, a frame is fixed outside the machine base, an outer cylinder is horizontally fixed on one side of the machine base, and the outer cylinder is fixedly connected with the frame; the crushing seat is arranged above the outer cylinder; the combustion system is arranged on one side of the outer barrel, and the combustion system is externally connected with a hot gas booster fan; the sealing end cover is fixed in the outer cylinder body; the carbonization cylinder is rotationally mounted on the machine base, and one end of the carbonization cylinder is coaxially and rotationally connected with the sealing end cover; the heat control unit is arranged in the annular cavity of the carbonization cylinder; the material guide channel is arranged on the sealing end cover; the filter material unit is fixed in the carbonization cylinder; according to the device, a scrap mixture can be graded according to the particle size, primary carbonization of the scrap mixture is achieved, then the scrap mixture is remixed and then subjected to high-temperature pyrolysis carbonization, and the purity and quality of biochar preparation are improved.

The invention discloses a flame straw carbonization and rotary burying returning-to-field all-in-one machine which comprises a power mechanism and a rack, a straw carbonization mechanism for providing rapid incineration and carbonization flames is arranged on the front portion of a cavity of the rack, and a rotary burying returning-to-field mechanism capable of burying straw incineration and carbonization products into soil in a rotary mode is arranged on the rear portion of the cavity of the rack. A carbonization area cover plate of the straw carbonization mechanism and side protection plates on the two sides of the carbonization area cover plate are combined to form a relatively-closed straw carbonization area with an opening in the front side, and a rotary tillage cover plate of the rotary burying and returning mechanism and side protection plates on the two sides of the rotary tillage and returning mechanism are combined to form a relatively-closed rotary tillage and returning area. The smoke filtering mechanism can extract smoke entering the space between the straw carbonization area and the rotary tillage field returning area after straw incineration and carbonization and smoke generated when straw incineration and carbonization products on the rear side of the rotary tillage field returning area are mixed into soil, and the smoke and the smoke are discharged after being filtered. According to the all-in-one machine, straw can be rapidly carbonized and returned to the field after crops are harvested, the soil quality can be improved, the breeding risk of plant diseases and insect pests can be reduced, the sustainability of agricultural production can be effectively improved, and environment friendliness and high efficiency are achieved.

Systems and methods for producing green hydrogen from a source material (e.g., biowaste) are contemplated. The source material is at least partially dehydrated to produce a dried intermediate and recovered water. The dried intermediate is pyrolyzed to produce syngas and a char. The recovered water is electrolyzed to produce oxygen and green hydrogen.

It has been discovered that heat energy may be captured from various process streams in a chemical recycling facility, such as the pyrolysis effluent streams, pyrolysis gas streams, and pyrolysis flue gas streams. More particularly, it has been discovered that residual heat energy from various process streams in a chemical recycling facility may be used to preheat waste plastic streams and provide heat for waste plastic pyrolysis. Consequently, the pyrolysis processes and systems described herein may obtain a lower carbon footprint.

A fully modularized mid-feed pyrolysis reactor includes modularized upper, middle, and lower vessels. The middle vessel is equipped with at least two feeding units. Discharge pipes of the feeding units are placed into the core feeding and reaction zone of the reactor. The discharge outlets of the discharge pipes are equipped with heat-insulating valves that can automatically close under gravity. The lower vessel integrates an integrated grate, which can be rotatably arranged inside the lower vessel. The top of the integrated grate is equipped with a rotatable distributor including a support tray and a material distribution tower with a pointed top structure positioned at the center of the support tray. The bracket formed by water-cooling pipes on the distributor can act as an agitator. Under the premise of achieving precise control, this invention solves the technical problems of single feedstock and small reactor capacity in existing bottom-feed vertical pyrolysis reactors.

The invention discloses a biomass pyrolysis gasification boiler control system and method, and relates to the technical field of biomass pyrolysis. A material distribution assembly comprises a material storage box and a slope material distribution part arranged below the material storage box, an intermittent material rotating assembly is rotationally installed in the material storage box and engaged with a vertical toothed plate, the intermittent material rotating assembly is used for transferring biomass particles to the slope material distribution part from the material storage box, and a closed material carrying assembly is arranged in a pyrolysis gasification furnace in a sliding mode. The closed material loading assembly comprises a closed lifting disc used for pushing the material distributing assembly to move, and two top sealing plates are installed on the closed lifting disc through torsional springs. According to the invention, the uniform laying and pyrolysis gasification of the next batch of biomass particles on the biomass carrying plate can be realized under the condition of keeping the pyrolysis gasification chamber isolated from external air, so that the non-accumulation type and closed feeding type pyrolysis gasification process of biomass can be realized; a large amount of heat loss caused by convection between air and the pyrolysis gasification chamber in the biomass feeding process can be effectively avoided.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The present invention discloses a pyrolysis oil and gas cutting device and method, comprising a waste rubber pellet pyrolysis module, a pyrolysis oil and gas high-efficiency cutting module, a pyrolysis oil and gas condensation module, a Roots blower, a non-condensable gas pressure-stabilizing and conveying module, and a control module. By spraying cooling water and circulating non-condensable gas onto the high-temperature pyrolysis oil and gas, the present invention utilizes the vaporization of the cooling water to absorb a large amount of latent heat of phase change, fully condensing the high-temperature pyrolysis oil and gas. Furthermore, the generated water vapor and non-condensable gas reduce the partial pressure of low-flash-point components in the oil and gas, causing them to continuously migrate from the liquid phase to the gas phase. While ensuring that the oil product flash point meets standards, the minimum flash point cutting temperature required for condensation of high-flash-point oil is lowered, thereby increasing the yield of high-flash-point oil.

A method of producing an agglomerate mainly composed of carbon of biomass origin is provided. The method of producing an agglomerate mainly composed of carbon includes a grinding step of grinding biomass having a volatile matter of 1 mass% or more and less than 20 mass% on a dry basis to obtain a biomass powder having a maximum particle size of 300 µm or less, and a hot pressing step of compacting the biomass powder at a temperature included in a temperature range of 600 °C or more and 1250 °C or less in an oxygen-deprived environment to obtain an agglomerate.

It has been discovered that recycle content CO2 streams produced in a chemical recycling facility involving waste plastic pyrolysis can be converted into recycle content syngas (r-syngas), which can be used for various applications. More particularly, recycle content CO2 streams generated from a pyrolysis facility, a cracking facility, and / or an ethylene oxide facility may be recovered and converted into r-syngas. Moreover, recycle content methane, produced directly or indirectly from waste plastics, may also be used to produce flue gas streams, which provide additional recycle content CO2 streams to produce additional recycle content syngas. Thus, methods for producing a useful recycle content product (i.e., r-syngas) from conventional waste streams that are typically exhausted (i.e., CO2 streams) are provided herein.

The invention belongs to the technical field of slag recycling, and discloses a method for extracting iron ore concentrate from laterite-nickel ore hydrometallurgical slag, which comprises the following steps: heating biomass to 350-600 DEG C in a nitrogen atmosphere for treatment, heating to 350-600 DEG C in a carbon dioxide atmosphere for treatment, cooling, crushing and sieving to obtain biomass charcoal; the laterite-nickel ore hydrometallurgical slag, biomass charcoal and an additive are mixed and then subjected to reduction roasting, and a roasted product is obtained; and adding a dispersing agent into the roasted product, carrying out ball milling, and carrying out size mixing and magnetic separation to obtain iron ore concentrate. The process for extracting the iron ore concentrate from the biomass charcoal is developed for the laterite-nickel ore hydrometallurgical slag, has the advantages of being short in process, low in cost, environmentally friendly, good in recovery effect and the like, and has a positive effect on solving the environmental problems caused by long-term stockpiling, landfill and the like of the laterite-nickel ore hydrometallurgical slag.

The present invention discloses a microwave continuous frequency modulation collaborative biomass directional depolymerization device and its usage method, belonging to the technical field of biomass resource utilization. The device includes a microwave continuous frequency modulation power supply, a microwave resonant cavity, a quartz tube reactor, and a product treatment device; a microwave feed port is provided on the microwave resonant cavity, and the microwave continuous frequency modulation power supply is connected to the microwave feed port; the quartz tube reactor is connected to an inert gas source, a biomass feed hopper is connected to the quartz tube reactor, a catalyst filling screen spacer is provided in the middle, an infrared thermal imager is provided above, and an infrared thermometer is provided at the catalyst filling screen spacer; the product treatment device includes a condensation system and a gas collection bag, the condensation system is arranged at the outlet of the quartz tube reactor, and the gas collection bag is arranged at the outlet of the condensation system. The present invention matches the microwave emission frequency with the intrinsic resonance frequencies of the three major components of biomass and the catalyst to achieve the goal of reducing the biomass cracking activation energy and realizing directional depolymerization.

The invention discloses an agriculture and forestry solid waste baking semi-carbonization treatment process which sequentially comprises the steps of crushing, drying, feeding, preheating and drying, destructive distillation and carbonization, discharging, gas recovery and the like. The device comprises a spiral feeding cylinder, a feeding dispersing mechanism, a rotary inner cylinder, a fixed inner cylinder, a carbonization outer cylinder, a hot air inlet pipe, an air outlet, a waste heat return pipe, a vertical cylinder, a spiral discharging cylinder and a matched water cooling device, the rotary inner cylinder drives a fluted disc to rotate through a driving gear so as to achieve material turning, and the feeding dispersing mechanism adjusts the feeding position to avoid accumulation; the air outlet and the air outlet box recover the combustible gas and convey the combustible gas back to the combustion system for heating the carbonization outer cylinder; according to the invention, the cooperative operation effects of uniform drying of materials, full utilization of heat energy, improvement of carbonization efficiency and continuous and safe discharging are realized.

The invention discloses a sludge, bagasse and calcium oxide co-pyrolysis biochar as a soil additive, and a preparation method and application thereof, and belongs to the technical field of environmental restoration. Sludge biochar synergistically modified by bagasse and calcium oxide is used as a soil additive, calcium oxide is introduced for catalytic co-pyrolysis through the synergistic effect of bagasse and calcium oxide, and sludge-bagasse-calcium oxide biochar is prepared; the optimization effect of the sludge-bagasse-calcium oxide biochar in heavy metal contaminated soil remediation is evaluated through heavy metal occurrence form analysis, ecological risk assessment and soil remediation effect experiments. According to the sludge-bagasse-calcium oxide biochar prepared by the method, the fixing capacity of the biochar on heavy metals and the fixing efficiency of the heavy metals in soil are improved, and the physicochemical properties and fertility characteristics of the heavy metal contaminated soil are improved; the characteristics of the sludge-bagasse-calcium oxide biochar for well fixing heavy metals and improving soil properties are exerted, the ecological risk is reduced, the physicochemical properties and fertility characteristics of the soil are improved, and the application of a heavy metal contaminated soil remediation process is optimized.