193 results about "Refuse-derived fuel" patented technology

Mechanically and biologically stable briquettes and pellets are obtained from either municipal solid waste (MSW), Refuse Derived Fuel (RDF) or municipal sewage sludge and their combination for purposes of disposing said briquettes and pellets as fuel in waste-to-energy processes such as the one described herein or to form geometric aggregates with such briquettes for their disposal at landfill sites. The use of binding material is not required whereas fuel additives such as crushed coal and petroleum residues may be added to enhance fuel performance but are not needed to improve waste processing or product stability and mechanical properties.

A method for sorting and comprehensively utilizing municipal solid waste includes steps of: 1) feeding the municipal solid waste into a feeding tank through a feeding inlet, then outputting into a breaking device; 2) breaking refuse bags and large blocks by the breaking device; 3) transporting broken refuse into a two-stage roller screen for screening out dusts with a particle size of less than 3 mm, and hanging strips; and 4) transporting mixed refuse screened by the two-stage screen into a vibrating screen; screening oversize products by a heavy winnowing machine for separating inorganic blocks, large plastics and paper; transporting underflow products into a two-room multi-functional winnowing machine for dividing into heavy materials, light materials and medium materials. By effectively combining sorting devices, effective sorting and reutilization of mixed refuse are achieved. Thereafter, paper, fibers, plastics and kitchen organic refuse are respectively for producing refuse derived fuel, wood-plastic composite and fertilizer.

The invention discloses a technology for full classification recycling treatment on household waste and relates to the field of recycling integrated utilization of household waste. A main process route of the technology comprises that household waste is homogenized by a homogenizer, is subjected to large object sorting (wherein large objects comprise large combustibles and inorganic matters), is treated by a bag breaking device (for scratching a plastic packaging bag), is treated by a magnetic separator (for separating out magnetic materials), is treated by an eddy sorting machine (for separating out nonferrous metals), is subjected to artificial sorting, then is broken, is fed into a hydrothermal degradation tank, is treated by a light material separator (for separating out papers and plastics), and then is crushed; then mixed organic matters and percolate are mixed and then are subjected to methane fermentation so that methane is produced; and methane residues and a methane liquid are prepared into an organic fertilizer and inorganic matters are prepared into a building material and the combustibles are prepared into a refuse derived fuel (RDF). The technology really realizes reduction, harmlessness and recycling of waste.

The invention discloses a refuse derived fuel and a process for preparation. The refuse derived fuel takes domestic refuse as main components and is added with the appropriate amount of coal and calcium materials. The process for preparation comprises following steps: sorting and crushing municipal domestic refuse, grinding the coal and pre-treating raw materials which contain calcium, then, proportioning according to certain proportion, adopting the high pressure molding technology without agglomerant, and preparing the refuse derived fuel with certain energy concentration, hot and cold intensity and technical properties. The refuse derived fuel can sufficiently utilize combustible constituents in the domestic refuse with simple manufacturing technique, low conversion cost, good combustion, pyrolysis and gasification performances and realize that the refuse is enabled to be resources and to be less and to be innocuous.

The invention relates to a preparation method for preparing a derived fuel by utilizing combustible materials in garbage, comprising the following steps: (1) disinfecting; (2) carrying out rough selection on the garbage; (3) carrying out fine selection on the garbage; (4) adding CaO the weight of which accounts for 4%-8% of the total weight of the combustible materials into fine combustible materials, mixing and stirring uniformly; (5) adding a combustion improver and an adhesive, mixing and stirring uniformly; (6) draining and drying the fine combustion materials; (7) carrying out extrusion molding; (8) drying and cooling to obtain a finished product; and (9) detecting the heating value of the derived fuel. The preparation method has the beneficial effects that 1, the sorting index of the garbage is high, so that harmful substances in the derived fuel are effectively controlled; 2. the heat value of the derived fuel is high; 3, the CaO is added in the derived fuel of the garbage, effective disinfection is achieved and the generation of the harmful substances such as dioxin and the like in the combustion process is restrained; 4, the adhesive is added, so that the strength of a product is good, the product is not easy to break, and the structure shape is smooth; 5, the space formed by accumulation of the size of the shape of the finished product on a boiler grate is most beneficial to combustion; and 6, the resource utilization is maximized, the cost of production and manufacture is low, the production efficiency is high, the product quality is good, and the transportation and storage are convenient.

The invention discloses a medical rubbish harmless resource comprehensive utilization system. A comprehensive utilization method comprises the following steps of: sterilizing and disinfecting medical rubbish at high temperature and high pressure, sorting out disposable syringes, containers, trays and other medical hard plastics and disposable infusion tubes, infusion bags, blood bags, rubbish liquid bags and other medical soft plastics, collecting through splitting and classification, granulating, cleaning, drying and recycling; sorting out common waste plastics, recycling after cleaning, drying and granulating; sorting out paper plastic packaging materials, pulping, dewatering and recovering paper pulp; sorting out syringe needles, scalpels and other metal items and infusion bottles, smears and other glass items, and recycling at specialized rubbish recycling departments; and crushing, dewatering and drying the rest items, sending to produce RDF (Refuse Derived Fuel), and selling the RDF or using the RDF as a fuel of a steam boiler. Medical rubbish is completly recycled at high value. The medical rubbish resources do not emit pollutants during recycling and do not bring any harm to environment.

The invention discloses a method for performing pyrolysis uniting building-material utilization to rubbish oversize products. First rubbish undersize products with granularity smaller than 15mm are conveyed into a rubbish composting plant to perform composting or conveyed into a refuse landfill to serve as covering soil, and a treatment flow of the rubbish oversize products sequentially comprises drying, screening, crushing, winnowing, mixing, extrusion granulation, pyrolysis gasification and output recycling. Rubbish is processed into a refuse derived fuel (RDF) after waste heat drying at first, and not only are heat value and burning performance improved, but also secondary pollution of percolate, dioxin and the like is avoided. Combustible gas generated by a pyrolysis method enters into a cement kiln to be combusted, part of fuel required for cement clinker production can be replaced, and a stable high-temperature environment in the cement kiln can fully degrade dioxin generated by rubbish incineration. Ash residues serve as different building-material raw materials according to different heterogeneities, waste discharge is avoided, and no influence is caused on building-material production and product quality.

The invention discloses a gasification treatment device for household refuse. Combustible materials in the household refuseare treated and processed into refuse derived fuel RDF, and the RDF is subjected to pyrolysis gasification of a fixed bed gasifier and purification into clean gas. The device comprises an RDF processing system, a gasification system and a gas purification system, wherein the RDF processing system comprises a discharge hopper, a plate feeder, a refuse breaker, a rotary screen, a magneticseparator, a dehydrator, a rotary dryer and a refuse press; the gasification system comprises a normal-pressure fixed bed gasifier, a feeding hole, a slag hole, a gas hole and a blower device; and the gas purification system comprises a cyclone dust collector, an electrical tar precipitator, a heat exchanger, a washer and an adsorption tower. The RDF is subjected to pyrolysis gasification of the fixed bed gasifier to form combustible gas, the combustible gas is purified by the gas purification system, and finally the gas is delivered to a gas holder through a Roots blower; the slag after the gasification is delivered to a brick making device for producing building materials; and wastewater generated by gas purification enters a wastewater tank for further treatment.

The invention provides a human household garbage disposition and recycling method. The human household garbage disposition and recycling method comprises following steps: 1) human household garbage is sieved using a bouncing sieve so as to divide the human household garbage into an oversize light material, an oversize heavy material, and an undersize material; 2) the oversize light material is subjected to secondary crushing and secondary squeezing and dewatering, an obtained product is subjected to refuse derived fuel (RDF) treatment; the oversize heavy material is subjected to sorting firstly, an obtained residue is subjected to sorting using a magnet separator, and an obtained material is subjected to RDF treatment; the undersize material is subjected to squeezing and dewatering, an obtained solid material is subjected to secondary sorting using a secondary separating sieve, an obtained secondary oversize product is subjected to sieving using the magnet separator, an obtained nonmetallic substance is subjected to secondary crushing and secondary squeezing and dewatering, and an obtained processed product is subjected to RDF treatment. According to the human household garbage disposition and recycling method, fermentation chamber ponds and fermentation equipment are not needed; the human household garbage disposition and recycling method is friendly to the environment, is very suitable for city building, and is relatively in cost, so that the human household garbage disposition and recycling method is especially suitable for small and medium garbage disposal plants in medium and small towns.

The invention provides a method for comprehensive treatment of household refuses and secondary pollution control. The method comprises the following procedures of: 1) coarse separation of the household refuses; 2) pretreatment of the household refuses; 3) fine separation of the household refuses; 4) aerobic composting of the household refuses; 5) biological organic fertilizer preparation; 6) fabrication of refuse derived fuels; and 7) secondary pollution control. The method employs parallel dual-separation lines which are compact in arrangement; each functional unit device is rational in configuration, easy to operate and mechanically control; the sorting efficiency and the energy source recovery effect are obviously improved; and minimization, harmless treatment, recycling and energy conversion of the household refuses can be realized.

A fuel preprocess system for a coal combustion boiler is disclosed. The fuel preprocess system for a coal combustion boiler that dries biomass or refuse-derived fuel in accordance with the present invention can include: a dryer configured to dry the biomass or refuse-derived fuel by use of flue gas generated after combustion in the boiler; and a torrefier configured to devolatilize a fibrous component contained in the dried fuel from the fuel dried in the dryer by use of primary air that is heat-exchanged after the combustion in the boiler.

A thermal reactor for producing usable heat energy by destroying waste including a vessel wherein organic waste upon entering said vessel gasifies as it falls onto a carbon bed and is transformed into a synthesis gas with high heat and kinetic energy that can be harnessed to produce electricity. Inorganic waste upon entering melts as it falls onto the carbon bed and exits via slag ports to form an inert slag. Because there is no oxygen present in the gasification zone, the waste is not combusted and neither furan or dioxin are formed. The waste includes either prepared refuse derived fuel (RDF) or unprepared raw waste or a combination thereof.

A system for producing oil from waste material includes a catalytic decomposition reactor providing a stirrer for stirring at least one kind of raw material; the raw material being selected from a group consisting of lingo cellulosic hydrocarbon, biomass like marine plants, waste plastic, waste, waste oil, RDF (Refuse derived fuel) and RPF (Refuse plastic fuel), and a catalyst for decomposing the selected raw materials; the catalytic decomposition reactor serving for decomposing the raw materials and producing vapor and gaseous oil and sludge; a condenser for condensing the gaseous oil generated from the catalytic decomposition reactor; a storing container for storing oil condensed from the condenser; and a distillation tower oil from the storing container by heat from a steam boiler and collecting heavy oil, diesel oil and gasoline through a heavy oil output port, a diesel output port and a gasoline output port in boiling points.

The invention aims to provide a chlorine fixing agent suitable for reducing chloride emission in combustion gas of tail gas waste derived fuel. The chlorine fixing agent comprises the following components of acetylene sludge, fly ash and exciting agent in percentage of (60-80): (15-30): (3-10) by weight. With the adoption of the chlorine fixing agent, the purpose of treatment of wastes with processes of wastes against one another is realized; the waste is extruded into waste gas waste derived fuel at normal temperature under normal pressure, and the energy consumption is low; the volatilization rate of S-element and Cl-element are reduced greatly, so the chlorine fixing agent is beneficial for the waste combustion treatment; and the inflaming property of the waste is reduced. The waste derived fuel prepared by the preparation method has high compressive strength, and is suitable for the subsequent use of the waste derived fuel in combustion furnace and gasification furnace.

A burner assembly cofires a primary solid fuel and a secondary solid fuel in a combustion zone of a boiler. The burner assembly includes a fuel injector that mixes the primary solid fuel and the secondary solid fuel prior to injection into the combustion zone of the boiler. The primary solid fuel may be pulverized coal, pulverized petroleum coke, or the like, while the secondary solid fuel may be a biomass fuel or refuse-derived fuel.

The invention discloses a processing method of municipal solid wastes and a device thereof, the method comprises the following steps: presorting native incoming wastes by a waste screen, presorting large-piece masonry and too large organic matter to obtain presorted wastes; smashing the presorted large-piece masonry into brick making raw material, mixing the smashed too large organic matter and the presorted wastes, feeding the mixture into a drum screen to screen, with the undersized waste used for composting or is disinfected at high temperature into brick making raw material, feeding the dried oversized material into a garbage winnowing device, winnowing heavy material, humified organic matter, non-recyclable combustible material and light plastic. Metal is recovered from the heavy material and the heavy material is disinfected at high temperature after being picked out of the battery, smashed into brick making raw material; the humified organic matter is used for composting and is burned directly in an incinerator; non-recyclable combustible material is smashed to prepare refuse derived fuel; light plastic is used for preparing regeneration particles. The invention has the advantages of small investment, small floor area, low operation cost, no secondary pollution and thorough reduction.

The invention relates to an urban venous industrial park. Municipal solid waste is divided into old home appliances, construction waste, household waste, food waste, sludge, faeces and other biomass waste by a household waste separating system; the household waste is divided into dry waste and wet waste by a dry and wet separation device; the old home appliances, the construction waste and the dry waste are treated by a fossil waste processing system so as to form glass, plastic, metal, refuse derived fuel and recycled materials, and additionally, the fossil waste processing system is respectively connected with a generating system and a heating system; and the wet waste, the food waste, the sludge, the faeces and the other biomass waste are treated by a biomass waste processing system so as to form recycled water, biological carbon soil, methane gas and carbon dioxide. According to the urban venous industrial park, a resource-product-renewable resource closed-loop mode is realized, and the waste is changed into valuables and is recycled.

This invention describes a process for a complete sequestration of carbon (CO₂) from Municipal Solid Waste (MSW) to energy plants which produce Refuse Derived Fuel and the associated exhaust gases. The described process results in production of energy from the waste and disposal of the MSW with zero carbon emission.

The invention relates to a system for extracting rubbish derived fuel (RDF) from municipal rubbish. The system is characterized by comprising a rubbish receiving device, a first crushing machine, a biological fermentation pond, a first iron remover, a sieving machine, a gravity separator, a second iron remover, a vortex separator, an inert material storage bank, a sorting belt, a vibrating sieve,a second crushing machine and an RDF storage bank, wherein a conveying device is arranged between the rubbish receiving device and an input port of the first crushing machine; a conveying device is arranged between the output port of the first crushing machine and the biological fermentation pond; the oversize product output port of the sieving machine is positioned above the input end of the sorting belt; the output end of the sorting belt is communicated with the input port of the vibrating sieve; and a conveying device is arranged between the undersize product output port of the vibrating sieve and the RDF storage bank. The system can extract the RDF from the municipal rubbish and is applicable to extracting the RDF from mixed and collected original rubbish.

A municipal household waste treating method and a device thereof are disclosed. Raw waste conveyed to a plant is subjected to pre-sorting through a screen for waste to sort out large bricks and stones and large and long organic matters, thus obtaining presorted waste. The sorted large bricks and stones are smashed and adopted as raw materials for manufacturing bricks. The large and long organic matters are smashed, then mixed with the presorted waste, conveyed to a rotary screen, and screened. Screen underflow materials are used for compost or adopted as raw materials for manufacturing bricks after the screen underflow materials are disinfected at high temperatures. Oversize products are dried, fed into a waste air classification apparatus, and subjected to air classification to obtain heavy materials, humified organic matters, unrecyclable combustible materials and light plastic. Metals are recovered from the heavy materials, batteries are sorted out from the heavy materials, and then the heavy materials are disinfected at high temperatures and smashed as raw materials for manufacturing bricks. The humified organic matters are used for compost or are directly incinerated in an incinerator. The unrecyclable combustible materials are smashed and are used for preparing waste-derivative fuels. The light plastic is used for preparing plastic reclaimed particles. The method and the device are advantaged by low investment, saved occupied space, a low running cost, no secondary pollution, thorough reduction, and the like.

An integral process of synthesizing garbage fuel and incinerating it to generate power includes preparing garbage made fuel by process of grinding, drying, magnetic selecting, modifying, mixing and pressing; sending prepared garbage made fuel into boiler to burn it for generating power; using boiler tail fume and steam of steam turbine in preparing course of garbage fuel to provide heat source being used in drying unit and modifying unit in preparing course of garbage fuel.

The invention discloses a municipal refuse treatment device and a municipal refuse treatment method. A primary selection machine, a coarse crusher, a primary dehydrator, a winnowing machine, a primary metal sorting machine, a screening machine, a fine crusher, a secondary dehydrator, a secondary metal sorting machine, a mixer, a refuse derived fuel (RDF) molding machine and a drying machine are sequentially connected in series between a feeder and an RDF racking machine, wherein the screening machine is connected with an anaerobic generator; a stable dehydrator is connected in series between the anaerobic generator and a biochemical treater; the bottoms of the primary dehydrator and the second dehydrator are provided with water outlets, and the water outlets are connected with a water inlet of the anaerobic generator through a pipeline; and a methane purifier, a gas storage tank and a methane boiler are sequentially connected in series between the anaerobic generator and hot air of the drying machine. Due to a two-stage dehydration mode, a thermal load of the drying machine is effectively reduced before refuse enters the drying machine, and the consumption of external energy is effectively reduced; and moreover, in the process of anaerobic reaction, the chemical oxygen demand (COD) of the effluent is reduced, and the pressure of a subsequent biochemical reactor is reduced.

The invention discloses a refuse-derived fuel based on combustible components of domestic refuse and a preparation method thereof, which are suitable for resource treatment of the domestic refuse. The refuse-derived fuel comprises the following components in percentage by weight: 65.0%-74.0% of the combustible components of the domestic refuse, 21.5%-30% of bituminous coal, 1.0%-2.5% of calcium oxide and 2.5%-3.5% of binding agent. The preparation method comprises the following steps of: firstly sorting the urban domestic refuse to obtain the combustible components; then drying and crushing the combustible components; then mixing various materials according to the mixture ratio and uniformly stirring; and finally performing extrusion forming. The refuse-derived fuel has the advantages of high calorific value, stable combustion, very low emission of dioxin, no pollution of heavy metals, and easiness in storage and transportation, and can realize reduction, harmlessness and resource utilization of the domestic refuse.