6125 results about "Domestic waste" patented technology

The invention relates to multi-column sectional drive combined type domestic incinerator. It is set three fire-grates that drying section, burning section, and firing section. The middle fire grate is connected between them. There is altitude fall between them that the drying section is the highest point; the firing one is the lowest point. The primary air chamber is respectively set under them. The incinerator fire grate system of the invention has independent drive mechanism, air supply system, and air chamber for each section which is convenient for controlling technical parameter that traveling speed, air quantity, air temperature, air pressure etc to realize full drying and burning for whole garbage layer.

A system uses thermal solar energy coupled with microwaves and plasma for producing carbon monoxide (CO) and dihydrogen (H2) from carbonated compounds (biomass, domestic waste, sludge from waste water, fossil coal), wherein the obtained gaseous mixture yields, amongst others, hydrocarbon fuels (olefins, paraffin), esters, and alcohols via a Fischer-Tropsch synthesis. In a first step the carbonated compounds are roasted and pyrolized to produce char and dry coal, and a mixture of superheated gases containing CO2, steam, tars and non-condensable volatile materials. The method includes in a second step, and from the pyrolyis products (char or coal, gas mixture), generating a syngas substantially containing a mixture of carbon monoxide and dihydrogen, the mixture being used in Fischer-Tropsch synthesis units. After the Fischer-Tropsch step, the synthesis products are separated in a distillation column after heating in solar furnaces of mixed furnaces (solar/microwave).

The invention discloses a combined anaerobic fermentation method of organic solid wastes. The organic solid wastes used for the combined anaerobic fermentation include domestic wastes, excess sludge, feces, kitchen waste, straws, etc. The method comprises the following steps: carrying out different pre-processing processes to obtain organic materials with a granularity less than 5 mm; passing through a cutting pump, adjusting the C/N ratio, adjusting the water content, etc. to obtain a homogeneous fermentation substrate with a solid holdup of 2 to 10%; hydrolyzing and acidifying the fermentation substrate in the presence of a hydrolase; fermenting for a period of 15 to 25 days under the condition of stirring at a middle temperature of 32-38 DEG C to obtain biogas, which can be used for energy supply or output of a system; aging and desalting the biogas liquid to obtain a liquid humic acid fertilizer; and processing the biogas residues to a granular humic acid fertilizer. The fermentation substrate has proper C/N ratio to obviate feedback suppression of the substrate during the fermentation of a single material and simultaneously can enhance the hydrolysis effects of celluloses, lignin, hemicelluloses, etc. The method has the advantages of easy flow pattern control, low energy consumption, and no generation of sewages, and can obtain the high-quality biogas fluid and the high-quality granular humic acid fertilizer.

The invention provides an organic/inorganic drought resisting compound fertilizer and a preparation method thereof. The preparation method comprises the following special steps of: at first, carrying out harmless treatment on raw materials of an organic fertilizer, such as livestock excrement, crop straws, kitchen garbage, fallen leaves, turf and peat, humic acid and the like, so as to obtain the organic fertilizer; then adding a macromolecule moisture retention material and an inorganic fertilizer at a certain ratio and uniformly stirring; and finally obtaining the organic/inorganic drought resisting compound fertilizer by extruding granulation. The organic/inorganic drought resisting compound fertilizer disclosed by the invention has functions of drought resistance and moisture retention, nutrient slow release and soil fertilization, so that the effects of increasing production and income of the crops are achieved. Furthermore, the organic/inorganic drought resisting compound fertilizer can effectively solve the environment pollution caused by the livestock excrement, straw burning and domestic garbage.

The invention discloses a method for continuously treating domestic garbage, more specifically belongs to a method for continuously treating domestic garbage according to the process flows of pretreatment, crushing, dehydration, drying, cracking, incineration, etc. Dioxin C2H4O2 is not produced in the garbage treatment process; and the method can realize various requirements of massive and continuous treatment, reclamation (the energy in the garbage is stored in a manner of collecting hydrocarbon oil), energy saving, environmental protection, high efficiency, and the like, in domestic garbage treatment. The devices adopted in the method belong to standardized commodities for industrial use, and have the advantages of reliable operation, mature technology, simple structure and low investment. The method of the invention belongs to the continuous garbage treatment process, can completely and thoroughly implement reduction, harmless treatment and reclamation of mountains of domestic garbage, and is characterized by good novelty, creativity and industrial applicability.

The invention provides a household garbage processing method, comprising the following processing steps which are technique process of sorting, high-temperature and high-pressure hydrolysis and hydrothermal oxidation of organic substances, composting with organic substances, fuel brick production with non-recoverable and combustible substances, building material production with inorganic substances, plastic grain production, recyclable substances recycling, waste gas processing, sewage water processing and thermal power supply, etc. The household garbage processing method of the invention hasthe advantages of occupying little land area and having short processing time, pollution avoidance, low running cost, effective processing of noxious gas, high product quality, high-efficiency and environmental protection, and can be widely used for the processing of household garbage in various regions.

The invention provides a process, a system and equipment for converting household garbage without support combustion of the prior fuels, which relates to a process and equipment for processing garbage. The process is characterized in that the household garbage is sent into a gasification furnace or an incinerator after separating, dehydrating by rolling compaction and air-drying treatment; garbage fuel is converted in the furnace by a mode of gasification or incineration, and is subjected to baking, pyrogenation, gasification and carbon residue burn-out in the furnace; the converted synthesis gas is used for cleaning energy; waste heat of incineration is absorbed by heat-exchange equipment for reclamation; garbage rolling liquid is sent into a digesting machine for anaerobic fermentation so as to produce biogas, the biogas is used as auxiliary fuel of the incinerator, and the digested residue and residual liquid are used for fertilizing crops; and inorganic substances separated from the garbage are used as raw materials to manufacture bricks, and clinker discharged from the incinerator or the gasification furnace is used for producing cement or fertilizer. The process, the system and the equipment comprehensively utilize the garbage so as to achieve complete dissolving treatment, and the equipment has a simple structure and low investment cost, and is easy to popularize..

The invention discloses an advanced treatment system and method for high-concentration percolate in a comprehensive garbage disposal plant, belonging to the field of industrial waste water treatment. The system is formed by connecting a regulating tank, a coagulative precipitation tank, an upflow anaerobic sludge bed reaction tank, a primary anoxic and aerobic membrane bioreactor, advanced oxidation treatment equipment, a secondary anoxic and aerobic membrane bioreactor, nanofiltration membrane treatment equipment, an ozone contact tank and an active carbon filtering tower in sequence. According to the system, garbage percolate can be treated comprehensively, different pollutants in garbage percolate are treated in a classified way by combining physical, chemical and biological treatment,advanced treatment of garbage percolate is realized, and classified treatment for removing pollutants such as organic matters, heavy metals, ammonia, nitrogen and the like is performed, so that treated effluent strictly reaches the requirement of water pollution discharge degree limit in the Household Garbage Landfill Pollution Control Standard, the system runs stably for a long time, and treatment cost is lower than that of a secondary disc pipe reverse osmosis membrane process.

The invention discloses a composite microbial inoculum organic multielement compound fertilizer which is prepared from microbial inoculum, organic component and inorganic fertilizer. The microbial inoculum is a composite microbial inoculum which comprises the following three types of microbial inocula: resource type microbial inoculum, which contains Bacillus megaterium, thiobacillus thiooxidans, Bacillus mucilaginosus and Bacillus circulans; environment-friendly microbial inoculum, which contains Arthrobacter and Alcaligenes; and antibiotic microbial inoculum, which contains Streptomycs micuoflavus and Streptomyces jingyangensis. The organic component is one or more of cereal crop straw, subsidiary agricultural product dreg, sugar mill bagasse, bran coat, municipal and rural domestic waste, and livestock and poultry dung. The inorganic fertilizer is one or more of nitrogen fertilizer, phosphate fertilizer, potash fertilizer and medium/micro-nutrient element fertilizer. The weight proportion of microbial inoculum to organic constituent to inorganic fertilizer is (5-25):(18-28):(47-77).

The invention discloses a refuse incineration fly ash solidification/stabilization treatment method comprising the following steps of: firstly, sufficiently mixing a heavy metal stabilizer and water into a solution; mixing the solution, refuse incineration fly ashes and a little amount of cement, stirring and curing so that fly ashes has double-effect stabilization and certain intensity at the same time; finally, landfilling the fly ashes in a domestic refuse landfill site. The refuse incineration fly ash solidification/stabilization treatment method realizes fly ash decontamination and achieves the purpose of slightly increasing volume at the same time, thereby increasing the overall efficiency and the economical efficiency of a fly ash treating and disposing system and solving the problem of large increasing volume after the traditional cement solidification treatment.

A process for treating life garbage includes such steps as breaking, sorting them by wind separation and magnetic separating to obtain inorganic substance, organic garbage and waste plastics, using inorganic substance to prepare building material, treating the waste plastics by the plastics-treating system, hydrolyzing and dewatering the organic garbage and then spray drying, and further sorting to obtain inorganic substance used to prepare building material, organic substance used to prepare fertilizer and waste plastics treated by said plastic treating system.

A method is provided for converting organic material from domestic refuse into fuel for use in a pulverized coal power plant, comprising of mixing the organic material with at least one flammable material while adding binder, and pressing the mixture to form hard, relatively brittle agglomerates. Further provided is an installation for converting organic material from domestic refuse into fuel, comprising a device for mixing the organic material with at least one flammable material while adding binder, and device for pressing the mixture to form hard, relatively brittle agglomerates.

The domestic garbage separator includes a feeder, a magnetically separating conveyer with discharge port and discharge duct, a garbage winnowing device with powder discharge port and glass and pebble discharge port, a garbage beater, a cylindrical sieve, an oversize winnowing device with several discharge ports, an undersize winnowing device with several discharge ports, and a frame. The present invention has clear domestic garbage classification, high recovering rate, environment friendship and other advantages, and can reduce amount of domestic garbage, make best utilization of domestic garbage resource and treat domestic garbage harmlessly.

The invention discloses a method for resource recovery and classification utilization of urban domestic wastes, which at least comprises the following steps of: a magnetic separation step, a waste cutting step, a elutriation flotation step, a waste extrusion dehydration step, an anaerobic treatment step and a sludge deposition concentration step; scrap iron is separated by the magnetic separationstep for the recovery and utilization of the scrap iron; anaerobic organic matter is crushed by the waste cutting step; pasty organic matter and block non-anaerobic wastes are thoroughly separated bythe elutriation flotation step so as to allow the pasty anaerobic organic matter to enter a biogas generation pool or tank for an anaerobic reaction and to allow the clean non-anaerobic wastes to be extruded, dehydrated and dried for individual treatment, and the waste decrement is above 90%; after elutriation, the left 10% non-anaerobic wastes are prepared into fuel oil by a cracking reaction; or are recycled through screening with no screening difficulty being caused by dust and organic matter containing in the wastes; or are delivered into a gasifier for fuel gas production, which preventsthe energy consumption of water-containing organic matter during waste incineration treatment, and greatly increases the thermal efficiency of waste treatment.

The invention provides a new combined treatment process for oilfield solid waste (oil sludge, industrial solid waste and household garbage). In the process, liquid-solid separation is performed on the oil sludge of an oilfield by adopting a conditioning-centrifugal separation process; the separated liquid enters oil-water separation equipment constructed on the oilfield for recovering crude oil; the oil recovery rate is up to 65 to 90 percent; after drying separated solid residue, the separated solid residue and pre-crushed industrial solid waste and household garbage are mixed and enter a countercurrent-type rotary gasification incinerator; combustible components in the oilfield solid waste are decomposed and gasified into combustible gases which are combusted partially in the incinerator; the combustible gases are combusted completely in a secondary combustion chamber; high-temperature smoke gas afterheat is recovered by a conduction oil afterheat boiler and air preheating equipment; and low-temperature smoke gas of which the afterheat is recovered is harmlessly exhausted after being treated by a sharp-quenching deacidification tower, an activated carbon adsorption tower and a bag-type dust remover. The process realizes the purposes of decrement, harmlessness and resources of oilfield solid waste treatment.

The invention relates to double loop double pyrolysis incinerator and its using method. Its features are that drying apparatus is formed by horizontal rotary kiln drying device, steam separator, and fume reflux line; the feed port of the horizontal rotary kiln is connected with discharge port of the feeding device; its discharge port is connected with the feed port above secondary burning chamber. While running, part of high temperature fume of secondary burning chamber can enter the rotary kiln to process reverse drying preheat and pyrolysis for the garbage; cooled fume is inducted into the secondary burning chamber by secondary fan after dehydrating by steam separator. Compared with exiting technique, the invention has the advantages of continual heat transfer, fast gasification rate, full burning, processing domestic garbage without auxiliary fuel etc.

The invention provides a system and a method for comprehensively recycling for household refuse pyrolysis. The system comprises a pretreatment device, a heat accumulating type revolving bed pyrolysis furnace, an oil-gas separating and purifying device, a fixed bed gasifying device, a pyrolysis gas storage device and a combustible gas recycling device. The method comprises the following steps: after carrying out pretreatment such as sorting, crushing, drying and forming on household refuse raw materials, carrying out pyrolysis in the heat accumulating type revolving bed pyrolysis furnace to obtain a high-temperature oil gas and pyrolysis carbon; and gasifying the pyrolysis carbon to produce a gasified combustible gas which is used as a fuel of a heat-accumulating type fuel gas radiant tube combustor. According to the system and the method, the operation cost is low, the economic benefits are good, the produced gasified combustible gas with a low heating value is ventilated into the heat-accumulating type fuel gas radiant tube combustor to combust, so that the problems that the gasified pyrolysis refuse carbon is poor in economic benefits and the recycling for household refuse pyrolysis is difficult to industrially popularize are solved.

The invention relates to the method of a kind of using synergizing lawn plant to restore the heavy metal compound pollution in city life waste compost. In the period from seeding to mowing of grasses on lawn, fertilize EDTA into the waste compost base substance as per 5 - 30 mmol/kg; through fertilize EDTA, increase the extracting effect of lawn grasses to heavy metal in city life waste compost base substance, to make the effect of lawn glasses corresponding to the effect of heavy metal super-enriching plant. The application of the invention can not only rebuild waste compost industry, and realize the effective resource use of waste compost, but also provide scientific basis for complexing restoration of lawn grasses to heavy metal pollution area.

The invention discloses a method for comprehensively treating and utilizing household garbage incineration slag.. The method comprises the following steps: A. screening and primary crushing of slag; B. primary magnetic separation; C. secondary crushing: the slag subjected to the primary magnetic separation is conveyed into a flushing water continuous injection type sanding machine through a conveying belt, the slag is crushed in the sanding machine, and the crushed slag granules flow out of the sanding machine together with the flushing water; D. secondary magnetic separation: the mixture of the slag and the flushing water flowing out of the outlet of the sanding machine flows by a drum magnetic iron remover, and magnetic metals contained in the slag are picked out by secondary magnetic separation; E. buoyancy gravity concentration on other metals; and F. precipitation of non-metallic tailings. Since other metals are picked up by secondary magnetic separation and buoyancy gravity concentration, the metal content in the slag is effectively decreased, the quality of bricks or cement is guaranteed when the treated slag is used to make bricks or cement; and since the flushing water is continuously injected into the sanding machine, most of disgusting odor can be removed and dust is eliminated, and the water circulation manner is adopted, the advantages of saving energy and protecting the environment are achieved.

The invention relates to a method for comprehensively treating municipal solid waste. The method comprises mechanical treatment steps of manual sorting, bag breaking, magnetic separation, screening with a roller, winnowing and pulpifying and biological treatment steps of anaerobic digestion and aerobic composting. By combining all the steps for use, different components in the municipal solid waste are classified according to physicochemical properties of the components and then are treated; magnetic metal, plastic paper and the like which are obtained through sorting are recycled; organic waste obtained through sorting is crushed and pulpified and then is subjected to anaerobic digestion so as to produce methane; sludge is subjected to aerobic composting so as to produce organic fertilizer; the residual inorganic substances which cannot be treated or recycled can be subjected to sanitary landfill; and odor which is produced in the waste treatment process is treated in a centralized way, and then is discharged after reaching the standard. The method has great significance for treating the increasing municipal solid waste.

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 relates to a method for recycling metal and combustibles from domestic waste incineration slag, and belongs to the field of the solid waste harmless and recycling technology. By means of multi-stage gradient magnetic separation, separation of magnetic metal in the slag is achieved. By means of two-stage eddy current, nonferrous metal in the slag is separated and recycled. According to the grain size distribution and chemical morphological characteristics of the metal in the slag, the metal is crushed and screened in multiple steps so that separated slag particles can be uniform, the recycling rate of magnetic separation and eddy current separation is effectively increased, and finally, according to the density difference of materials, air separation is used for recycling the combustibles in the slag. Finally, the magnetic separation recycling rate of iron in the technological process is 60-80%, the recycling rate of the nonferrous metal aluminum is 60-70%, the recycling rate of the nonferrous metal copper is 40-50%, and separation of the metal in the slag and slag particles can be effectively achieved. The separated metal products can be directly sold or sold after refining, the combustibles can serve as waste incinerator fuel, and the remaining slag can be used as building materials.