32 results about "Municipal solid waste incinerator" patented technology

In one example of an embodiment of the invention, a method for producing an aggregate is disclosed comprising mixing sewage sludge from a waste water treatment facility with a non-coal combustion ash silicoaluminous waste material, agglomerating the mixture to form an agglomerate, and pyroprocessing the agglomerate to form an aggregate. The waste material may comprise municipal solid waste incinerator bottom ash, incinerator fly ash, incinerator filter dusts, cement kiln dusts, waste glass, blast furnace slag, kiln dusts, and/or granite sawing residues, for example. The method may further comprise milling the waste material prior to mixing. Preferably, the milling is wet milling. Pyroprocessing of the agglomerate may take place in a rotary kiln. The resulting aggregate may be a lightweight or a normal weight, sintered or vitrified aggregate. Aggregates and methods for making aggregates of high and low calcium silicoaluminous materials are also disclosed.

The invention discloses a method for preparing unburned slag wall bricks by utilizing household garbage burned slag. The method comprises the following steps of: proportioning the following raw materials in percentage by mass: 37.9 to 70.2 percent of household garbage burned slag, 4.7 to 19.0 percent of lime, 4.7 to 23.7 percent of cement, 7.6 to 19.0 percent of gypsum and 2.5 to 5.2 percent of excitant; preparing the excitant into aqueous solution and mixing the aqueous solution and other components in the raw materials to make the water content of the raw materials reach 8 to 12 percent; and pressing, molding, and curing to obtain the unburned slag wall bricks. The method can not only solve the problem of the treatment of current municipal household garbage burned slag to realize the resource utilization of the slag, but also reduce the discharge of the municipal household garbage burned slag so as to reduce the environmental pollution caused by the accumulation and the landfill of the municipal household garbage burned slag; and the method has the advantages that: the slag waste material has high resource utilization rate, the process is simple, the method is convenient to operate, the operating cost is low and the like.

The invention discloses a produce method for grain fuel used in municipal refuse incinerator, which comprises: separating, breaking, draining, evaporating, secondary breaking, granulating and drying. This invention reduces the require to material, heat value and moisture, enlarges scope of application, cuts energy consumption and cost, decreases pollution greatly, and can be used to restart stop-production incinerator.

The invention discloses an ash and burnt removal agent composition for rural domestic waste incinerator. The ash and burnt removal agent comprises the components with the following weight portions of 50-70 percent of nitrates, 5-10 percent of loosening agent, 10-15 percent of sodium chloride, 5-15 percent of activator, 5-10 percent of vermiculite and 1-2 percent of cupric oxychloride. The nitrates are cupric nitrate and sodium nitrate. The loosening agent refers to borax. The activator refers to ammonium nitrate, carbon powder and sulfur powder. The ash and burnt removal agent is applied in ash and burnt removal field of the rural domestic waste incinerator, which has good effect for improving the ash and slag in the waste incinerator.

The invention discloses a method for preparing cement from municipal solid waste incineration furnace slag.According to the method, the municipal solid waste incineration furnace slag substitutes raw materials of the cement to make cement raw meal, portland cement clinker is fired, and safety use of the cement is guaranteed.In the actual cement production process, a bypass air discharging system is arranged, normal operation of a cement kiln is guaranteed, the crusting and blocking phenomena of volatile components which are wrapped and carried by the raw materials to a cement kiln system caused by the circular enrichment rule are eliminated, and quality of a cement product can be guaranteed.By means of the method, waste materials can be changed into things of value, the municipal solid waste incineration furnace slag is adopted as the substitute raw material in the cement production process, on one hand, the effect that the incineration furnace slag is reutilized can be achieved, and on the other hand, the demand for natural raw materials of the cement can be reduced.

The invention discloses a method of purifying urban household waste incinerator residue step by step. The method comprises the steps of drying, screening, magnetic separation, water washing, acid leaching, roasting, water quenching, and secondary acid leaching, wherein the residue from each purification step corresponds to different morphology, physical properties and chemical composition; the residues may be applied to different fields. SiO2 is purified from the household waste incinerator residues through simple processes; the period is short; the energy consumption is low; mass impurities in the residues are effectively removed. The method herein provides another route to acquire massive silicon sources against the situation that massive waste incinerator residues are produced each yearin China; wastes are turned into wealth and are effectively reused.

The invention discloses a feeding device for an MSW incinerator and belongs to waste feeding devices. The feeding devices for the MSW incinerator comprises a waste hopper, a hopper door and flap bridge device, a waste sliding pipe and a water cooling clamping sleeve, wherein the upper end of the waste hopper in a feeding inlet, and the lower end of the waste hopper is a feeding outlet; the hopper door and flap bridge device is movably arranged on the wall, above the feeding outlet, of the waste hopper and can be opened inward the feeding outlet of the waste hopper along the movable joint of the wall of the waste hopper and the hopper door and flap bridge device; the waste sliding pipe is connected with the feeding outlet of the waste hopper; and the water cooling clamping sleeve is sleeved outside the wall of the waste hopper, above the feeding outlet of the waste hopper, and the waste sliding pipe. The feeding device for the MSW incinerator solves the problem of heat damage to the feeding device, which is caused by waste bridge blocking, in-incinerator heat radiation, backfire and the like, in an existing MSW incinerator feeding system.

The invention belongs to the technical field of environment protection and discloses a preparation method of a water dephosphorization porous ceramic filter ball. Typical solid waste is used as a rawmaterial for collaborative treatment. The method includes: pretreating a raw material, controlling raw material grain size, and grading; uniformly mixing the raw material to obtain paste; granulating,and aging; performing gradient temperature-controlled calcining, wherein the raw material is composed of, by mass, 21-65% of Bayer-process red mud, 9-38% of urban domestic waste incinerator slag, 4-23% of excitant, 3-15% of pore forming agent and 5-10% of binder. The porous ceramic filter ball prepared by the method has the advantages of high porosity, uniform pore distribution, large specific surface area, high water absorptivity, high dephosphorization ability and speed and resistance to hydraulic impact, is excellent in various physiochemical properties, can be applied in water dephosphorization and can realize solid waste cooperative treatment and recycling and reduce solid waste accumulation.

The invention relates to a method for producing alinite cement by utilizing municipal solid waste incinerator fly ash. The method includes that solid waste incinerator fly ash is taken as main raw material, the raw materials including 25-40wt% of solid waste incinerator fly ash, 17-20wt% of limestone, 3-5wt% of coal ash and 3-9wt% of calcium chloride are mixed, ground into powder and made into pat, the pat is placed into a high temperature furnace and heated to 1200 DEG C, heat preservation is carried out for a period of time, and then the pat is taken out and quenched to room temperature, thus obtaining the alinite cement clinker. Compared with the prior art, the invention has the advantages of energy conservation and emission reduction as well as huge social benefit, economic benefit and environmental protection benefit.

The invention discloses a fixing method of carbon dioxide in flue gas of a municipal solid waste incinerator. The fixing method comprises the following steps: by adopting absorption devices including a water regulating tank, an absorption tower, a separation tower and an absorption tank, with a leachate of the incinerator as an absorbent, introducing the flue gas containing CO2 generated by waste incineration into the leachate at a certain flow rate, carrying out rapid reaction on a great amount of ions including calcium ions and magnesium ions contained in the leachate and the CO2 in the flue gas in the absorption tower, enabling a liquid after reaction to produce a carbonate precipitate in the separation tower by virtue of pH regulation, realizing solid-liquid separation, achieving fixing and separation of the CO2 in the flue gas, absorbing released CO2 by adopting ammonia to produce an ammonium bicarbonate fertilizer, or enabling the released CO2 to reflux to the absorption tower, and trapping, separating and solid storing the CO2 in the flue gas of the municipal solid waste incinerator in an internal circulation mode. According to the fixing method disclosed by the invention, the CO2 in the flue gas of the municipal solid waste incinerator is effectively controlled by adopting the internal circulation mode; the fixing method has the advantages that the absorbent is wide in source, low in cost and high in efficiency, is capable of solving the problem of scaling of the leachate in subsequent processing and is suitable for trapping and fixing the CO2 in the flue gas of the municipal solid waste incinerator.

The invention relates to a composite household garbage incinerator bottom slag coal ash for concrete, and the coal ash is prepared by grinding the bottom slag of a household garbage incinerator, wet discharged coal ash, basalt and composite activity excitant by virtue of grinding equipment and then mixing the materials uniformly. The fineness of the composite coal ash is controlled to be less than 15% of residues via a square hole sieve 45mm in diameter, and the water content of the coal ash is less than 0.5%. The coal ash is simple in production process, and takes easily obtained wet discharged coal ash, the bottom slag of the household garbage incinerator, waste corner material of a basalt plant and other industrial wastes as main raw materials. By virtue of optimal combination, the optimal superimposed effect and grain composition of all components are expressed fully, thus part of cement in the concrete can be replaced by the composite coal ash. The coal ash can be used for saving resources and energy source, and is beneficial to industrial production, environmental protection, energy conservation and emission reduction, can be used for developing a new way for the resource utilization of the bottom slag of the municipal household garbage incinerator, and has good social effects and economic benefits.

The invention relates to the technical field of garbage treatment systems, in particular to a comprehensive utilization process of municipal solid waste incineration slag. The process realizes recovery of metal substances in the slag through production processes of primary screening, manual screening, primary magnetic separation, primary crushing, secondary magnetic separation, jigging separation, drum screening and shaking table screening. Magnetic metal and non-ferrous metal in the slag are screened and recovered in a wet recovery manner, the process design is reasonable and efficient, the metal with utilization value in the slag can be recovered to the maximum extent, and the problem of resource waste in the past is solved.

The invention discloses a grate device used for an urban domestic garbage incinerator, and belongs to garbage processing equipment. The grate device used for the urban domestic garbage incinerator comprises a drying grate, a burning grate, a burnt grate and a driving device, wherein the drying grate, the burning grate and the burnt grate are sequentially connected and are arranged sequentially from top to bottom in a staged mode; the grating face of each grate is inclined downward; the drying grate, the burning grate and the burnt grate are respectively driven by the driving device to carry out reciprocating type mechanical motion in the same direction. The grate device used for the urban domestic garbage incinerator solves the problems that garbage cannot be burned completely caused by low calorific value and high ash content in existing urban domestic garbage incineration.

The invention provides a method for stabilizing fly ash of a municipal solid waste incinerator by using artificial sea water, and relates to a process for stabilizing heavy metals in the fly ash of the municipal solid waste incinerator. The method comprises the following steps of: weighing the fly ash and sea salt in a mass ratio of 1:0.01-0.5; weighing distilled water and the sea salt in the mass ratio of 30 to 1; dissolving the sea salt into the distilled water to make the artificial sea water; adding the fly ash into the artificial sea water; stirring for 10 to 30min to generate heavy mortar mixture; drying and maintaining the heavy mortar mixture for 2 to 3 days under a natural ventilating condition, and detecting that immersion of the heavy metals in the mixture meets the safe landfill requirement of 'Identification Standards for Hazardous Wastes-Identification for Extraction Toxicity' (GB5085.3-2007). The invention has the advantages of readily available raw materials and low cost, and cannot generate secondary pollution to the environment.

The invention discloses a lightweight porous thermal insulation material and a preparation method thereof. The lightweight porous thermal insulation material comprises the following components in weight percentage: 45%-80% of construction waste, 5%-40% of municipal solid waste incineration slag, 5%-40% of fly ash, 5%-25% of a foaming agent and 0.5%-2% of auxiliary materials, wherein the auxiliarymaterials include 0.2%-1.5% of a foam stabilizer and 0.2%-1.5% of a fluxing agent. According to the preparation method, all the raw materials of the lightweight porous thermal insulation material arewastes and are easily available, the process is simple, the cost is low, solid wastes such as construction waste, municipal solid waste incinerator slag, fly ash and agricultural straw and husk are directly used as the raw materials, and the preparation process is simple. The porous thermal insulation material has high structural strength, low water absorption rate, low density and low thermal conductivity; the production cost of the foamed porous material is effectively lowered, the environment is protected, and a waste is turned into treasure, so as to achieve obvious economic and environmental benefits.

The invention discloses a method of using urban domestic waste incinerator residue to produce lightweight foam concrete. The method comprises the steps of 1) weathering urban domestic waste incinerator residue, and washing with water; 2) pouring the materials other than a foaming agent and water, into a stirrer, and mixing well; 3) adding quantitative super-pure water and prepared sodium alginateinto the stirrer; 4) adding the foaming agent during stirring, pouring the mixed slurry immediately into a produced mold, covering the surface with a layer of preservative film, and allowing standingfor foaming; 5) removing the mold, storing the foam concrete in a curing tank for curing so as to obtain the lightweight foam concrete with good mechanical properties. The method provides a wider engineering applicable range for incinerator residue, has the advantages of environmental friendliness, low price, good simplicity and the like, and is worthy of application in the large-scale productionof lightweight foam concrete.