1653results about "Solid fuels" patented technology

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 relates to the technical field of dechlorination devices, and provides a high-chlorine coal washing dechlorination leaching device which comprises a dechlorination tank body provided with a washing dechlorination area, and a circulation opening is formed in the bottom of the washing dechlorination area; the conveying part is circularly arranged on the dechlorination tank body, the plurality of push plates are arranged on the conveying part, and the push plates are configured to move along the bottom of the washing dechlorination area under the driving of the conveying part; the screen piece is arranged on the circulation opening; the first spray pipe is arranged on the dechlorination tank body and located below the screen piece, the first spray pipe is provided with a first nozzle, and the first nozzle faces the screen piece. According to the technical scheme, the problems that in the prior art, the dechlorination effect needs to be improved when a traditional kettle body is subjected to water washing dechlorination, and a filter screen part in the kettle body is prone to being blocked are solved.

Certain exemplary embodiments can provide systems and / or methods for producing dried biomass materials, such as from bales of biomass. Biomass materials can be converted into, e.g., pellets, briquettes, cubes, and / or other products with dried and / or densified states. These dried, densified products can be used for, e.g., bioenergy and / or animal feed applications.

The invention relates to the technical field of coal dechlorination, and provides a chain plate type leaching dechlorination system which comprises an immersion pool, the rack is divided into an immersion section and a leaching section, the immersion section is located in the immersion pool, and one end of the leaching section is located outside the immersion pool; the chain plate conveying belt is circularly and movably arranged on the rack and provided with a plurality of first partition plates, and the first partition plates are evenly distributed at intervals; the number of the guard plates is two, and the two guard plates are arranged on the two sides of the rack. The multiple material containing plates are arranged relative to the chain plate conveying belt in a swinging mode and located between the adjacent first partition plates. A material containing space is formed among the adjacent first partition plates, the two protection plates and the material containing plate. The material containing plate swings to enable the material containing space to swing; after the chain plate conveying belt circularly moves, the plurality of material containing spaces are sequentially separated from the immersion pool. By means of the technical scheme, the problems that in the prior art, coal can only be conveyed outwards after being dechlorinated in a dechlorination pool, and the overall production efficiency is low are solved.

The invention relates to the technical field of biomass fuel processing, and discloses biomass fuel production and processing equipment, which comprises a granulation box body, a flat die rotationally connected in the granulation box body, a compression roller arranged above the flat die, a rotating assembly mounted at the bottom of the granulation box body and used for driving the flat die to rotate, and a control assembly mounted at the bottom of the granulation box body and used for controlling the compression roller to rotate, the telescopic assembly is mounted on the side wall of the granulating box body and is used for driving the compression roller to move up and down and adjusting the distance between the flat die and the compression roller; and the spacing control system is in communication connection with the control end of the telescopic assembly and is used for accurately controlling the spacing between the flat die and the compression roller. The distance control system obtains raw material characteristics, equipment states and particle quality data in real time, constructs a multi-dimensional evaluation model and dynamically adjusts the distance between the pressing roller and the flat die, the problems that manual adjustment is low in precision and high in machine blockage risk are solved, intelligent and accurate control is achieved, safe operation of equipment is guaranteed, and the particle quality is optimized.

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.

The invention belongs to the technical field of coal combustion, and particularly relates to an environment-friendly rare earth catalyst as well as a preparation method and application thereof in promoting coal combustion. The catalyst is prepared from composite rare earth oxide, calcium oxide, potassium carbonate, ferrous sulfate, kaolin, diatomite and a multi-component composite assistant component in a specific proportion through the steps of slurry ultrasonic activation, rare earth coating, assistant step-by-step doping, microwave drying, protective atmosphere roasting and the like. The catalyst is unique in structure and good in dispersity, the coal combustion efficiency can be remarkably improved, the burnout temperature and the carbon content of fly ash are reduced, emission of flue gas pollutants such as CO, NOx and SO2 is effectively reduced, and the catalyst is suitable for the fields of energy conservation, carbon reduction and environment-friendly treatment of coal-fired power plants and industrial boilers.

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 invention discloses a method for recycling laterite-nickel ore metallurgical slag resources, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: carrying out alkaline leaching treatment on the laterite-nickel ore hydrometallurgical slag to obtain alkaline leaching liquid and alkaline leaching slag; carrying out acid leaching treatment on the alkaline leaching residues to obtain acid leaching liquid and acid leaching residues; mixing the acid leaching residues, a biomass reducing agent and an additive, performing primary ball milling treatment, and performing reduction roasting treatment on an obtained product to obtain a roasted product; and mixing the roasted product with a dispersing agent, carrying out secondary ball milling treatment, and carrying out magnetic separation on the obtained product to obtain iron ore concentrate. According to the method, the biomass is carbonized and activated to obtain the biomass reducing agent with enhanced reducibility, the biomass reducing agent is low in cost and environmentally friendly, the biomass reducing agent and the acid leaching residues are continuously mixed according to a specific proportion, reduction roasting is carried out under a specific atmosphere, and then magnetic separation is carried out; and iron ore concentrate with relatively high purity and yield is obtained.

The invention discloses a biomass fuel rod and a production method and application thereof, and belongs to the technical field of biomass fuels, the biomass fuel rod comprises the following components by mass: 60-80 parts of a biomass raw material, 10-20 parts of a binder, 1-5 parts of a combustion improver, 3-8 parts of a sulfur and chlorine fixing agent, 1-3 parts of a denitration agent, and 2-5 parts of an ash content regulator. The production method specifically comprises the following steps: (1) pretreatment: crushing a biomass raw material until the particle size is less than or equal to 2mm, and carrying out pretreatment by adopting baking semi-carbonization; (2) mixing: sequentially adding a binder, a combustion improver, a sulfur-fixing and chlorine-fixing agent, a denitration agent and an ash content regulator which are ground until the particle size is less than or equal to 2mm, and stirring and mixing for 5-10 minutes; (3) forming: carrying out extrusion forming by adopting a twin-screw extruder under the pressure of 15-25MPa and the temperature of 80-100 DEG C to obtain a fuel rod with the density of 1.2-1.4 g / cm < 3 >; the production method is simple and easy to implement, the combustion performance of the produced fuel rod is good, and the combustion efficiency and the environmental protection property are improved.

This solid fuel comprises: a biocoke of at least 85% fixed carbon on the anhydrous ash-free basis; and an inorganic binder containing CaO in a dry state at 50 mass% or higher. This method for producing a solid fuel comprises a step in which a solid fuel is obtained by kneading and molding a molding starting material comprising: a biocoke of at least 85% fixed carbon on the anhydrous ash-free basis; an inorganic binder containing CaO in a dry state at 50 mass% or higher; and water.

A method for treating hazardous waste using a coal-based short-process system belongs to the field of hazardous waste treatment technology. The method of the present invention first performs deep reduction on the material, then uses a coal-based lance to generate heat in a molten bath to heat the material to a molten state, and then uses electrodes to heat the melt to separate the slag and matte, resulting in qualified matte. The molten bath produces high-temperature flue gas rich in carbon monoxide, which is fully combusted in a rotary kiln. When producing alloys, ore and coal are heated and deep reduction is performed. No reducing agent is required to produce matte, and sufficient sulfide allows the ore to be sulfided in the rotary kiln. The rotary kiln and molten bath furnace adopt an integrated configuration to reduce heat loss. Coal powder is directly delivered to the working surface, effectively avoiding the ineffective consumption of carbonaceous reducing agents and further enhancing the reduction effect. The method of the present invention has the characteristics of a short process, simple operation, easy control, strong raw material adaptability, high production efficiency, low production cost, low equipment investment, low energy consumption, high copper recovery rate, and environmental friendliness.

The present invention relates to the technical field of municipal sludge and industrial sludge treatment methods. Disclosed is a hydrothermal carbonization-based method for comprehensively treating iron-containing sludge and straw, comprising the following steps: 1) crushing and sieving straw, primarily dehydrating iron-containing sludge, and adding a catalyst for catalytic wet oxidation treatment; 2) adding wet-oxidized iron-containing sludge and a crushed and sieved fiber to a raw material storage tank and adding a dehydrating agent for dehydration treatment; 3) preheating a raw material conveying tank and then feeding the material into a reactor for a hydrothermal carbonization reaction; 4) collecting the resulting biochar slurry to a collecting tank for cooling; and 5) adding an appropriate amount of pulverized coal to the material and then carrying out plate press dehydration, or directly carrying out plate press dehydration, the material being used as a solid fuel. The present invention integrates two techniques, i.e., anaerobic digestion and hydrothermal carbonization, for sludge treatment, and the process is optimized from material and energy balance perspectives, so that the solid fuel and biochar substances are generated while sludge reduction is realized; moreover, the operation cost of the process is reduced, and the generated hydrothermal carbon can be either returned to the field for use or be used as an additive to promote anaerobic digestion, and also exhibits magnetism and can be recycled.

The invention relates to a manufacturing method of a sludge-biomass fuel rod. The manufacturing method comprises the following steps: S1, sludge pretreatment: dehydrating sludge; s2, sludge crushing treatment: performing crushing treatment on the dewatered sludge to obtain sludge particles with the particle size of less than or equal to 3mm; s3, sludge and biomass are mixed, wherein the sludge particles obtained in the step S2 and biomass particles are stirred and mixed according to the mass ratio of (10-90): (90-10), and a sludge-biomass forming raw material is obtained; s4, sludge-biomass raw material extrusion forming: performing extrusion forming on the sludge-biomass forming raw material obtained in the step S3 to obtain the sludge-biomass fuel rod. Compared with the prior art, the prepared sludge-biomass fuel rod has better combustion characteristics and stability. The sludge can play a bonding role in the fuel rod forming process, a compact body structure is conveniently formed, and forming is convenient; and the biomass is beneficial to improving the combustion characteristic of the fuel rod.

A system for reducing organic waste and increasing biogas production combined with a hydrothermal carbonization device with improved energy consumption efficiency is disclosed. According to one aspect of the present invention, the system for reducing organic waste and increasing biogas production includes: a storage tank for receiving and storing organic waste; an anaerobic digestion tank for receiving the organic waste from the storage tank to digest the organic matter and produce biogas; a dehydrator for primary dehydration of the organic waste discharged from the anaerobic digestion tank; a hydrothermal carbonization device for receiving the dehydrated organic waste and hydrothermal carbonization; and a filter press for secondary dehydration of the hydrothermal carbonization product discharged from the hydrothermal carbonization device.

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

The invention discloses a method for comprehensively recycling electrolytic aluminum carbon residues, and relates to the technical field of comprehensive recycling of waste materials. The method for comprehensively recycling the electrolytic aluminum carbon residues comprises the following steps of: breaking the carbon residues into 0.1-1cm particles by a hammer, carrying out wet ball milling under the condition of adding a flotation agent, and separating carbon powder on the upper layer and gray regenerated cryolite on the bottom layer of slurry through flotation equipment, wherein the fineness is 40-100 meshes, and the carbon content is less than 1%; the preparation method comprises the following steps: adding water into cryolite to prepare slurry, adding calcium oxide or calcium hydroxide, heating, stirring and reacting for 1-3 hours, and carrying out filter pressing to obtain filtrate and filter residues which are calcium fluoride and a sodium metaaluminate solution; the purity of the calcium fluoride powder is greater than 85%; and introducing hydrochloric acid into the filtrate, stirring and adjusting the pH to 7-9 to obtain aluminum hydroxide slurry, filtering and washing to obtain aluminum hydroxide, and drying to obtain the aluminum hydroxide with the purity of more than 95%.

To provide a carbide processing apparatus and a carbide processing method, which achieve energy saving.SOLUTION: A carbide processing apparatus 100 comprises: a carbonization furnace 6 for carbonizing a carbonization target; and a drying processing unit D for drying the carbonization target to be supplied to the carbonization furnace 6, the drying processing unit D comprises: a first dryer 3 for pre-drying the carbonization target; a second dryer 1 for finish-drying the carbonization target pre-dried by the first dryer 3 in a layered state, and the second dryer 1 comprises: a ventilation section 17 for passing drying gas G3 from a bottom of a deposition layer B of the carbonization target; and a discharge unit 14 for supplying the carbonization target below the deposition layer B to the carbonization furnace 6.SELECTED DRAWING: Figure 1

The invention relates to a method for preparing ultra-pure coal through combination of grinding and flotation. The method comprises the following steps: carrying out primary surface modification and flotation to remove most of gangue; fine silt on the surfaces of the coal particles is removed through scrubbing and ore grinding, and the hydrophobicity of the coal is improved by combining secondary surface modification and flotation; the coal quality is judged according to the ash content of secondary flotation clean coal, if the ash content is larger than 3%, dissociation ore grinding and grading are conducted, and it is guaranteed that coal and gangue are fully dissociated; double-emulsion surface modification is adopted to enhance the dispersibility of the agent, and finally, the ultra-pure coal with the ash content smaller than 1% is obtained through three-time flotation and four-time flotation. Through the synergistic effect of scrubbing ore grinding, dissociation ore grinding and multi-section flotation, the dissociation efficiency and flotation selectivity of coal and gangue are effectively improved, the method adapts to coal quality fluctuation, and the yield of ultra-pure coal is increased.

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

The invention provides an efficient treatment method and system for traditional Chinese medicine decoction piece wastewater, and belongs to the technical field of wastewater treatment.The efficient treatment method for the traditional Chinese medicine decoction piece wastewater comprises the steps of (1) pretreatment, (2) coagulating sedimentation, (3) pre-acidification, (4) UASB anaerobic reaction, (5) SBR aerobic treatment, (6) catalytic ozonation, (7) deep filtration and disinfection, (8) sludge treatment and (9) intelligent control. The traditional Chinese medicine decoction piece wastewater treatment system comprises a pretreatment module, a physicochemical treatment module, a biological treatment module, a sludge treatment module and an intelligent control module. Through integration of physical, chemical and biological treatment technologies, organic matters, suspended matters and chromaticity in wastewater are effectively removed, and the overall treatment efficiency and the system stability are improved; the sludge and the traditional Chinese medicine waste residues are mixed to prepare biomass fuel, waste recycling is achieved, meanwhile, biogas is recycled for power generation, energy consumption is reduced, and a'treatment-energy-resource 'closed loop is formed.

The present disclosure generally relates to compositions and methods of simultaneously making two unique biointermediates from a single lignocellulosic biomass feedstock, including a hydrophobic biohydrocarbon and a water insoluble hydrophilic cellulosic biopolymer for use in the production of renewable fuels, chemicals, and other carbon neutral materials commonly derived from petroleum and other fossil resources.

The invention provides a method for preparing carbon fuel from corn straw based on a functional composite binder, and belongs to the technical field of biomass solid fuel preparation. The preparation method comprises the following steps: uniformly mixing corn stalk charcoal powder with a functional composite binder to obtain a mixture, and then carrying out hot-pressing activation molding to obtain the corn stalk charcoal fuel. The functional composite binder comprises the following raw materials: phosphoric acid, polysilicic acid, polyethylene and sodium lignin sulfonate; the addition amount of the functional composite binder in the corn stalk carbon powder is 10-15 wt.%. According to the method, the controllability of the quality of the raw material carbon is greatly improved, the functional composite binder is adopted, the forming density, falling and breaking resistance and durability of the carbon fuel are improved, the process stability and repeatability are high, and a foundation is laid for large-scale production.

The invention discloses an ultra-pure coal preparation method based on a catalytic hot-melt extraction method. The method comprises the following steps: (1) grinding a coal sample to obtain coal powder; (2) uniformly mixing the pyrite catalyst with pulverized coal to obtain a coal / catalyst mixture; (3) mixing the coal / catalyst mixture with a composite extraction solvent, and extracting; wherein the composite extraction solvent comprises methylnaphthalene oil and methanol; (4) carrying out solid-liquid separation on the extracted product to respectively obtain extraction residues and extraction liquid; and (5) distilling to remove the extraction solvent in the extraction liquid, and cleaning the obtained solid product to obtain the ultra-pure coal. Through cooperation of catalysis and hot melting extraction, the extraction effect is good, and the yield of the ultra-pure coal is high.

The invention belongs to the technical field of additives for coal-fired boilers, and particularly relates to a coal-saving desulfurization ash-removal decoking agent applied to boilers. The coal-saving, desulfurization, ash-removal and coke-cleaning agent is prepared from the following components: a component A, a component B and a component C, wherein active components CaO, HoFeO3 and CeO2 are loaded on a carrier SrO-MgO; the component B is prepared by loading the active components MgCO3 and KNO3 on the carrier BaFe12O19; the component C is Cu-doped CoFe2O4, and the component C is Cu- The mass ratio of the component A to the component B to the component C is (5-8): (2-3): 1. The coal-saving desulfurization ash-removal coke cleaning agent can effectively save fuel, improve the sulfur fixation efficiency, reduce generation of coke scales on the furnace wall, remove old coke scales, improve the working condition of a circulating fluidized bed boiler and greatly reduce the operation and maintenance cost of the circulating fluidized bed boiler.

The present invention provides a coal-saving, desulfurization, and decoking catalyst for boilers and an application method thereof. Through the synergistic effect of multiple components, the catalyst can simultaneously achieve coal-saving, desulfurization, decoking, corrosion protection, and ash cleaning functions during boiler operation, effectively solving the problems of single function, low desulfurization efficiency, poor decoking effect, and insufficient adaptability in the prior art. The desulfurization catalyst neutralizes sulfur oxides in flue gas, reducing low-temperature slagging. The temperature-sensitive expansion particles dynamically expand and peel off hard coke. The porous carrier particles adsorb ash and complex salts. The high-temperature retention loosening agent and the catalyst work together to prevent secondary accumulation, improve heat transfer conditions, and increase boiler thermal efficiency. The coal-saving agent reduces fuel consumption. The metal protective agent forms an anti-corrosion film on the heated surface, extending the life of the equipment and significantly improving the economic efficiency of boiler operation.

The invention provides a sludge-based composite fuel as well as a preparation method and application thereof. The sludge-based composite fuel is prepared from the following raw materials in percentage: 40-60% of dewatered sludge, 20-40% of biomass powder, 3-8% of a nano catalyst and 2-5% of a composite adhesive. According to the sludge-based composite fuel, sludge, biomass and other fuels are mixed according to a certain proportion, the nano-catalyst is added to improve the combustion performance of the sludge fuel, the composite adhesive enhances the forming strength and waterproofness of the fuel, the component proportion and process conditions are optimized, and the sludge-based composite fuel is prepared. The problems that traditional sludge fuel is low in heat value, poor in combustion stability, high in pollutant emission and insufficient in forming storage performance are solved.

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

The utility model discloses a raw material mixing device for biomass fuel processing, which comprises a support frame, a mixing box, a crushing box and a filter plate, a support seat is fixedly arranged on one side of the support frame, the mixing box is fixedly arranged above the support frame, the crushing box is fixedly arranged at the top of the mixing box, the filter plate is arranged below the crushing box, and the filter plate is arranged below the crushing box. An air cylinder is arranged on the side wall of one side of the mixing box, a material pushing plate is arranged above the filter plate, a cleaning brush is arranged at the bottom of the material pushing plate, and a material guiding plate is arranged on the side wall of the other side of the mixing box. Through the arrangement of the crushing box, raw materials are crushed by the three crushing rollers in the crushing box before entering the mixing box, and the crushing rollers can crush the raw materials with different particle sizes and hardness into particles with uniform particle sizes, so that the raw materials can be more quickly mixed with other raw materials, and the uniformity and the mixing efficiency in the subsequent mixing process are improved; therefore, the overall quality of the biomass fuel is effectively improved.