25 results about "Plasma gasification" patented technology

The invention belongs to but not limited to the technical field of underground coal gasification, and discloses an underground coal gasification method and gas injection equipment. Constructing a directional drill hole and a gasification channel penetrating through the underground coal seam; a gas injection pipe with a plasma torch is put into the gasification channel, a gasification agent is injected, and in-situ gasification of the underground coal seam is implemented; and the generated gas is conveyed to the ground for collection through the drill hole. According to the underground coal gasification method and the gas injection equipment provided by the invention, the gasification agent is activated by the plurality of plasma torches arranged in the directional channel at the tail end of the gas injection pipe and then is directionally jetted to the coal seam, so that the gasification agent is in contact with the coal seam in a short time and is gasified, the directional conveying of the plasma gasification agent is realized, and the effective utilization rate of the plasma gasification agent is improved; meanwhile, a combustion space area of the coal seam after gasification can be expanded in a fan shape in the longitudinal direction with the gasification agent outlets of the plasma torches as the center, the expansion equivalent radius of the combustion space area is relatively large, and a large amount of coal can be gasified through one gasification channel.

The invention discloses a single-walled carbon nanotube and a preparation method and device thereof, and belongs to the technical field of nano materials. The device comprises an inert gas cylinder, a carrier gas injection pipeline, a gas flow controller, a cavity, a positive electrode bar, a negative electrode bar, two graphite felt electrodes woven with carbon fibers, a stainless steel screen, a filter membrane, a graphite table and a tubular furnace. When the electrode starts to discharge and the temperature of the high-temperature plasma gasification area reaches the gasification temperature of the solid carbon source and the solid catalyst, the solid carbon source and the catalyst start to be gasified, gasified reactants enter the sample growth area along with the inert gas flow to grow, and the grown single-walled carbon nanotubes reach the sample deposition area along with the gas flow. The device disclosed by the invention can generate uniform, stable and high-capacity ultrahigh-temperature plasma under normal pressure and relatively low voltage and current, and the simple and practical plasma technology is low in energy consumption, green and environment-friendly, can be used for macro preparation and is beneficial to overcoming the challenge of high-temperature synthesis.

The utility model discloses a rotary kiln type microwave plasma dangerous waste treatment device relates to plasma dangerous waste treatment technical field, including the processing box, the top one side of processing box is provided with gasification furnace, the inside of processing box is provided with filter screen, the top of filter screen is provided with draw -in rod, the inside of processing box is provided with activated carbon tank one side close to filter screen, the top of activated carbon tank is provided with handle. The utility model discloses a filter screen and in the activated carbon tank of having the activated carbon material of inside equipment can carry out the depth purification to the gas after plasma gasification treatment, and its advantage lies in: filter screen can efficiently intercept the solid particulate matter produced in the gasification process, and activated carbon can further adsorb the harmful gas remaining in the tail gas owing to the huge specific surface area and strong adsorption performance, realizes multiple purification effect, ensures that the emission gas meets the environmental protection standard, and the filter screen can be taken out from the processing box by pulling the draw -in rod upwards, and it is cleaned.

The present invention discloses a plasma gasification biomass power generation and synthetic ammonia co-production system, comprising a plasma gasification system, an impurity removal and separation system, a gas turbine power generation system, a supercritical carbon dioxide power generation system, a steam turbine power generation system, a synthetic ammonia and ammonia power generation system, and an air separation unit. The plasma gasification system employed in the present invention can significantly increase the yield of syngas; the impurity removal and separation system can improve gas purity; the gas turbine power generation system, the supercritical carbon dioxide power generation system, and the steam turbine power generation system can form a multi-stage, efficient syngas and waste heat utilization system, fully leveraging the advantages of distributed energy. Furthermore, the present invention effectively utilizes syngas waste heat while achieving the co-production of synthetic ammonia and ammonia power generation, further improving energy efficiency.

The application provides a double sandwich cup type dielectric barrier discharge fuel plasma gasification research device, three quartz cups with different sizes are nested and combined, a double layer cavity is formed at the bottom of the quartz cup, air in the upper layer cavity is extracted to form a vacuum layer, heat transfer in the heating area to the dielectric layer and the sealing area of the upper quartz cup is blocked, the quartz dielectric is prevented from being broken down under high temperature conditions, and air leakage caused by melting of the sealing structure under high temperature conditions is avoided. The lower layer cavity is used for placing a solid sample to carry out high temperature plasma reaction, reaction kinetics is obtained by detecting tail gas of the reaction, the thickness of the reaction cavity is controlled through the sealing pad, and the dead volume of the reaction is reduced. The circular protrusion in the grounding heating block binds the electric arc generated by the discharge electrode, and the discharge phenomenon at the edge of the discharge electrode is avoided. The integrated design reduces the complexity of installation of the experimental instrument, is easy to operate, and realizes the research on the plasma gas-solid reaction mechanism under the dielectric barrier discharge under high temperature conditions.

The utility model belongs to the technical field of cement production, and relates to a coupling biomass solid waste gasification cement kiln system, which comprises a rotary kiln and a decomposing furnace, and further comprises a biomass supply device, a solid waste supply device and a plasma gasification furnace, the kiln head hot air pipe is used for supplying kiln head low-temperature hot air to the biomass supply device and the solid waste supply device for drying, and the discharging end of the solid waste supply device and the discharging end of the biomass supply device are both arranged at corresponding feeding ports in the plasma gasification furnace. And a gas outlet of the plasma gasification furnace is connected to a gas inlet of the decomposing furnace. According to the utility model, the residue generated by the gasification furnace can be directly mixed and added into the cement raw material, and the solid waste containing calcium oxide, such as carbide slag, is used as a dechlorinating agent of the product synthesis gas of the gasification furnace, so that the energy of biomass can be fully utilized, the energy consumption is reduced, and the resource utilization of the solid waste is realized.

The invention discloses a device and method for preparing nano dispersed composite powder based on plasma gasification, and belongs to the technical field of nano material preparation. A non-transferred arc plasma torch is adopted as a core, different metal raw materials are independently evaporated through a plurality of plasma gasification furnaces connected in parallel, and a primary cooler, a phase cooling mixing tower and a gas-solid separation system are matched for cooperative work; the method specifically comprises the following steps: a plasma gasification system generates high-temperature plasma (200-500 DEG C above the boiling point of metal) through a non-transferred arc plasma torch, and dynamically adjusts the height of a crucible to maintain the gasification rate; the primary cooler (1600-2100 DEG C) enables the metal vapor to be nucleated and crystallized into nano-particles, and agglomeration is inhibited; the phase cooling mixing tower realizes uniform compounding of multiple components by utilizing liquid nitrogen quenching and nitrogen flow stirring; the method has the advantages of continuous production, controllable components, good dispersity, high safety and the like, and is suitable for industrial preparation of the multi-element nano alloy powder.

The invention discloses a plasma treatment system for medical waste treatment and hydrogen recovery and a treatment method thereof. The system comprises a pretreatment and feeding system, a stock bin, a plasma gasification furnace, a waste heat boiler, an ash residue collection system, a tail gas treatment system, a hydrogen recovery system and a public and auxiliary system which are communicated in sequence. Wherein a plasma generator is arranged at the middle lower part of the body of the plasma gasification furnace. Volume reduction, weight reduction and harmless treatment of medical waste can be achieved, and meanwhile recyclable hydrogen is generated.

The present invention relates to a process for manufacturing synthesis gas from end-of-life tires which comprises reducing the size and sorting if said end-of-life tires into sorted fragments. The sorted fragments are then subjected to a gasification reaction in at least one plasma gasifier comprising at least three plasma torches. Thereby, the sorted fragments of end-of-life tires are converted into synthesis gas whereby less CO2 is produced in comparison to state- of-the-art processes for treatments of end-of-life tires. Said synthesis gas is then preferably used as a feedstock for manufacturing synthetic fuels such as methane, methanol, Fischer-Tropsch hydrocarbons (and upgraded products made thereof).

The invention provides a plasma gasification and melting intelligent control system for solid waste treatment, and relates to the technical field of intelligent control, and the system comprises an acquisition module which is used for acquiring material level distribution data of a plurality of different heights in a gasification furnace; the first determining module is used for determining a material level stability potential function according to the material level distribution data; the calculation module is used for calculating a vortex risk factor for describing the material level accumulation degree based on the material level stability potential function; the screening module is used for screening a material level abnormal area based on the vortex risk factors; the output module is used for outputting the local material level compensation amount in the material level abnormal area with the vortex risk factor smaller than the preset vortex risk factor as the target; the second determining module is used for determining plasma power based on the compensated material level distribution data; and the treatment module is used for treating the solid waste according to the plasma power. The problems of local accumulation, insufficient combustion and synthesis gas quality fluctuation are solved, and collaborative optimization of treatment efficiency and energy efficiency is realized.

The invention discloses a plasma gasification furnace, and relates to the technical field of solid hazardous waste treatment. A plasma gasification furnace comprises a molten pool section used for containing radioactive waste and melting the radioactive waste under the external heating condition; the melting section is fixedly connected with the molten pool section and used for bearing the molten radioactive waste solution; the gasification section is fixedly connected with the melting section and is used for accommodating the radioactive waste solution for pyrolysis and gasification; the molten pool section and the melting section are both formed by laying large bricks; the large brick of the molten pool section comprises the following raw materials in parts by weight: 40-70 parts of electric smelting chromium oxide, 15-45 parts of corundum, 4-8 parts of aluminum oxide micro powder, 2-6 parts of chromium oxide micro powder, 3-7 parts of a binding agent and 0.05-0.15 part of an additive. The plasma gasification furnace solves the problems that the plasma gasification furnace is not resistant to corrosion, low in reliability and short in service life.

The invention provides a poly-generation system, which utilizes waste plastics and biomass to produce green methanol in a low-carbon and high-efficiency manner through plasma gasification, and performs combined power generation in combination with supercritical carbon dioxide Brayton cycle (SCBC) and organic Rankine cycle (ORC). The thermodynamic property of the system is good, and economic benefits are remarkable. In the whole methanol production process, the emission of carbon dioxide is low. The research provides a new way for the utilization of organic solid wastes, and provides valuable reference for the production of methanol in an environmentally sustainable manner in the future.

This invention relates to a method for the co-utilization of existing landfill waste and landfill gas to produce renewable methanol. RDF (Regenerative Thermal Deposition Facility) is pretreated and then purified into high-temperature syngas through pyrolysis, plasma gasification, desulfurization, and steam reforming. This purified syngas is mixed with steam-reformed landfill gas and green hydrogen obtained from water electrolysis, and the ratio is adjusted to obtain a methanol reaction feedstock gas satisfying [H2 / (2CO+3CO2)=0.9-1.1]. The feedstock gas is then used to produce methanol through a methanol synthesis reaction. Under a recycle ratio of 0.6-0.8, the hydrogen-to-carbon ratio of the syngas is 0.89-1.01, the methanol production exceeds 17 tons / hour, the system energy efficiency exceeds 75%, and the CO2 equivalent emission reduction rate is 82.5-91.7%. This invention achieves complementary carbon source utilization and hydrogen-to-carbon ratio through the parallel use of landfill waste and landfill gas as dual gas sources, improving system load stability and heat cascade utilization efficiency, and providing a new solution for the co-resource utilization of waste and the large-scale production of renewable methanol.

According to the plasma generator for the coal seam plasma gasification system, different types of gasification agents can be input at the same time according to underground coal seam gasification conditions, the injection flow and composition of the gasification agents are controlled, and high-temperature high-activity particles with different proportions are generated; controllable gas-solid reaction and gas-gas reaction are further carried out in the coal seam, hydrogen and carbon monoxide gas in different proportions are converted, regulation and control are sensitive, the conversion efficiency is high, the production intensity is high, few by-products are generated, and environment friendliness is achieved; according to underground coal bed gasification conditions, carbon dioxide and liquid water can be injected at the same time, the injection proportion of the carbon dioxide and the liquid water is flexibly regulated and controlled, in-situ efficient and flexible gasification regulation and control of a coal bed are achieved, coal gas meeting the coal-based high-value product synthesis requirement can be directly produced, the process of a ground coal gas treatment system is shortened, the investment and operation cost is reduced, and the production efficiency is improved. The operability is high, and stable synthesis of coal-based high-value products can be guaranteed.

Disclosed herein are novel devices, systems, and methods for resource recovery from various feed streams, including both liquid and solid waste streams. Specifically disclosed is a plasma gasification unit and / or system operated or controlled by artificial intelligence (AI). The AI can utilize reinforcement learning (RL) processes to adjust operational parameters for maximizing efficiency and / or output. The plasma gasification unit and / or system may be modular and / or mobile, with portions sized such that they may be contained in one or more shipping containers. The plasma gasification unit and / or system may also include one or more plasma gasification chambers, and uses electrical energy to form a high temperature plasma arc that gasifies feed materials (e.g., brine, brackish water, plastics) into saleable products (e.g., hydrogen, syngas and other fuels, methanol, ammonia, urea).

The utility model provides a plasma treatment system for medical waste treatment and hydrogen recovery. The system comprises a pretreatment and feeding system, a stock bin, a plasma gasification furnace, a waste heat boiler, an ash residue collection system, a tail gas treatment system, a hydrogen recovery system and a public and auxiliary system which are communicated in sequence, wherein a plasma generator is arranged at the middle lower part of the body of the plasma gasification furnace. According to the device, volume reduction, weight reduction and harmless treatment of medical wastes can be realized, and meanwhile, recyclable hydrogen is generated.

A waste gasification system employs extender tubes to conduct externally generated plasma to a central surface area of a contained pool of molten slag to promote efficient gasification.

The invention discloses a device and process for extracting beryllium from siliceous minerals in a closed circuit, including a microwave dryer I, a Raymond mill I, a collector and a dust collector I, a Raymond mill I and a collector are sequentially arranged downstream of the microwave dryer I, the dust outlet of the collector is connected to the dust collector I, the material outlet is connected to the ferrofluoride mixer I, the material outlet of the ferrofluoride mixer I is connected to a plasma gasification melting furnace, the material outlet of the plasma gasification melting furnace is connected to a crusher II, the crusher II is sequentially connected to the Raymond mill II, a storage tank, a dust collector IV, a gas-liquid mixer II, a circulating leaching tank, a belt vacuum filter I, a sedimentation tank and a belt vacuum filter II, the sediment outlet of the belt vacuum filter II is connected to a drying tower II, the drying tower II is connected to a carbon material mixer, and the carbon material mixer is connected to a microwave carbon thermal reduction furnace. The special connection structure of the invention is designed for closed-circuit extraction of beryllium, with high recovery rate, drug recycling, energy saving, safety, environmental protection, and zero gas, liquid and solid emissions.

The invention relates to a method for preparing renewable methanol by synergistically utilizing stock landfill garbage and landfill gas. According to the method, RDF is prepared through pretreatment, purified high-temperature synthesis gas is obtained through pyrolysis, plasma gasification, desulfurization and steam reforming, the purified high-temperature synthesis gas is mixed with waste landfill gas obtained through steam reforming and green hydrogen obtained through water electrolysis, the proportion is adjusted, methanol reaction raw material gas meeting the requirement that H2 / (2CO + 3CO2) = 0.9-1.1 is obtained, and then methanol is prepared from the raw material gas through a methanol synthesis reaction. Under the condition that the recycle ratio is 0.6-0.8, the hydrogen-carbon ratio of the synthesis gas is 0.89-1.01, the methanol yield exceeds 17 tons per hour, the system energy efficiency exceeds 75%, and the CO2 equivalent emission reduction rate is 82.5-91.7%. According to the invention, through'double-gas-source parallel 'of landfill garbage and landfill gas, carbon source utilization complementation and hydrogen-carbon ratio complementation are realized, the load stability of the system and the gradient utilization efficiency of heat are improved, and a new scheme is provided for collaborative recycling of wastes and large-scale production of renewable methanol.

The invention discloses a green electricity driven carbon-based energy microwave discharge plasma gasification reaction system and method, and relates to the technical field of plasma gasification and efficient utilization of renewable energy sources. The system mainly comprises a green power supply unit, a microwave discharge plasma gasification unit, a gasification agent supply unit and a product separation and purification unit, the green power supply unit is used for adjusting unstable power such as wind energy and solar energy into stable electric energy suitable for microwave excitation, and the plasma gasification process is driven; the microwave gasification unit realizes low-temperature efficient reaction of carbon-based fuel and a gasifying agent; the gasifying agent supply unit provides a plurality of optional gasifying agents including CO2 and water vapor; and the product separation and purification unit is used for gas purification and gasification agent recycling. The system realizes cooperative complementation of renewable energy and carbon-based energy, has the advantages of fast response, high energy efficiency, low carbon emission and the like, and is suitable for scenes of clean fuel preparation and carbon resource utilization.

The invention discloses a plasma gasification furnace suitable for radioactive waste, and relates to the technical field of gasification furnaces. The invention comprises a furnace body, wherein an inlet and an outlet are respectively arranged on the top and the bottom of the furnace body, a coal locking hopper is installed on the top of the inlet, a flue gas purification component, an opening taking and placing component and a thermal plasma combustion component are installed on the outer side surface of the furnace body, a grate is also arranged in the furnace body, and a carrying plate is installed at the center of the grate for placing radioactive waste. The invention divides the flue gas purification component into two parts, a top cover and a gas washing tower. The gas washing tower can be disassembled from the top cover for easy cleaning, and a flue gas purification filter cover is arranged in the gas washing tower, and is filled with activated carbon filler, which can absorb pollutants in the flue gas, and is effectively purified in combination with a detergent, so that the treated flue gas can be directly discharged, and the pollution is effectively reduced.

The utility model relates to the technical field of plasma gasification furnaces, aims to solve the problem that the treatment effect of materials is reduced due to the fact that the materials entering the gasification furnace are not uniformly mixed, and particularly relates to a plasma gasification furnace suitable for composite re-sintered bricks, which comprises a furnace body, and the side wall of the furnace body is communicated with a blanking frame. The end, away from the furnace body, of the discharging frame communicates with an auger mechanism, one end of the auger mechanism communicates with a frame body, the frame body is composed of a cylindrical box body and a horn-shaped box body, multiple sets of through grooves are formed in the top of the cylindrical box body in an annular array mode, through pipes are fixedly connected to the inner walls of the through grooves, and a hopper is arranged at the top of the frame body. When the gasification furnace is used, materials are pre-blanked in a partitioned and spaced mode, the frame rods guide the materials to be blanked in the direction, and the rotating rods rotating in the opposite directions are combined, so that the materials are fully mixed, and the material processing capacity of the gasification furnace is improved.

This invention provides a coal-fired power plant coupled with plasma gasification for cogeneration of methanol, belonging to the field of energy utilization. The system includes: a coal-fired power generation system for producing electricity by burning coal and emitting flue gas; a plasma gasification subsystem connected to the coal-fired power generation system for plasma gasification of solid waste to produce syngas; a carbon capture subsystem connected to both the coal-fired power generation system and the plasma gasification subsystem for decarbonizing the flue gas emitted from the coal-fired power generation system, absorbing carbon dioxide from the flue gas, emitting carbon dioxide gas, and exchanging heat with the plasma gasification subsystem; and a methanol synthesis subsystem connected to both the plasma gasification subsystem and the carbon capture subsystem for producing methanol based on syngas and carbon dioxide gas. This invention improves power generation efficiency and energy utilization.

The utility model belongs to the field of solid waste treatment, and particularly relates to a solid waste treatment system comprising a plasma gasification furnace. The solid waste treatment system comprises a plasma gasification furnace and a gas-fired boiler, the plasma gasification furnace comprises a furnace body, the furnace body is sequentially provided with a material inlet, a gasification chamber and a molten glass body outlet from top to bottom in the gravity direction, and the gasification chamber is communicated with the material inlet and the molten glass body outlet; the furnace body is also provided with a synthesis gas outlet which is positioned between the material inlet and the molten glass body outlet and is close to the material inlet; the gas-fired boiler is provided with a combustion chamber, and the combustion chamber is communicated with a synthesis gas outlet flue of the plasma gasification furnace. The solid waste treatment system provided by the utility model has the beneficial effects that the solid waste treatment system comprising the plasma gasification furnace and the gas-fired boiler is provided, solid waste can be treated in a high-efficiency and energy-saving harmless manner, and synthesis gas generated in the treatment process can be effectively utilized.

The invention discloses a device and a method for preparing nano silicon through medium-frequency melting in cooperation with plasma gasification, and belongs to the field of nano powder production.The device comprises a medium-frequency melting system, a plasma gasification system and a nano silicon collecting system.The silicon material is heated to 1700 DEG C or above in a vacuum environment through a medium-frequency melting furnace; the method comprises the following steps: removing sulfur and oxygen impurities by combining bottom blowing gas (methane / hydrogen), purifying by a deacidification tower and an activated carbon adsorption tower, transferring high-purity silicon liquid to a plasma gasification furnace, and heating to 1800-2100 DEG C (the contact area reaches 3200-3600 DEG C) under the driving of inert gas by utilizing a transferred arc plasma torch, so that the silicon liquid is gasified into steam. The steam is nucleated by a primary cooler (1600-2100 DEG C) and quenched by a liquid nitrogen quench tower to be below room temperature, and finally, nano silicon with the particle size of 30-60 nm and the purity of more than or equal to 99.99% is collected by a bag collector, multi-furnace collaborative feeding, dynamic liquid level adjustment and inert gas protection are adopted, efficient and continuous production is realized, and the problems of low efficiency, poor purity, insufficient safety and the like of a traditional method are solved.