92results about How to "Realize harmless use" patented technology

The invention relates to an iron tailing soil improvement agent and an iron tailing soil improvement method. The iron tailing soil improvement agent comprises biochar, rice husks, ceramsite, organic fertilizers, attapulgite powder and planting soil. A mass ratio of the biochar to the rice husks to the ceramsite to the organic fertilizers to the attapulgite powder to the planting soil is (0.5-3):(0.2-1):(0.5-1.5):(1-4):(1-2.5):(1.0-2.2). The iron tailing soil improvement agent and the iron tailing soil improvement method have the advantages that the particle size of soil can be improved by theaid of the iron tailing soil improvement agent, the loss rate of water in the soil can be eased, the water retention capacity can be enhanced, organic matters can be quickly and effectively supplemented, the content of organic matters in tailing can be effectively increased, and suitable environments can be provided for plant growth; the rice husks and the ceramsite are matched with one another, the porosity of iron tailing soil can be improved, the hardening degree of the soil can be lowered, the tailing soil can keep in excellent gas-permeable and soft states for a long term, accordingly, the iron tailing soil improvement agent and the iron tailing soil improvement method are favorable for respiration of animals and plants in the soil, and the survival rate can be increased.

The invention belongs to the field of development and utilization of renewable energy sources and environmental protection, and discloses a method for producing biogas by utilizing the fermentation of smooth cord-grass and cattle dung. The method comprises the following steps: the smooth cord-grass and the cattle dung are mixed evenly according to the proper proportion and are grafted for anaerobic fermentation, and an inoculum is one or various of biogas residues of old biogas tanks, putrid river mud or anaerobic digestion sludge of city sewage treatment plants; and the temperature of an anaerobic fermentation reaction is controlled to 35+-2 DEG C, fermented objects are stirred during the fermentation process, and the biogas can be produced within 24 hours of the fermentation. The method has the advantages that the method has simple process and strong maneuverability, adopts mixed anaerobic digestion to produce the biogas, not only synchronously treats two kinds of organic solid wastes, but also improves the biological transformation rate of the smooth cord-grass, ensures that the biogas yield of unit smooth cord-grass can improve 31.60 percent at best, and realizes the resourceful, quantitative and innoxious utilization of the smooth cord-grass and the cattle dung.

The invention discloses a circulating fluidized bed boiler system for incinerating waste blades and a working method thereof, and belongs to the technical field of fluidized bed boilers. A secondary air port of a circulating fluidized bed boiler is connected with a secondary fan through a secondary air pipeline; a crushing device is connected with an iron removing device, the iron removing deviceis connected with a conveying device, the conveying device is connected with a crushing device, the crushing device is connected with the secondary air pipeline through a conveying pipeline, and a first induced draft fan is arranged on the conveying pipeline; a flue gas outlet of the circulating fluidized bed boiler is connected with an inlet of a cyclone separator through a horizontal flue, and an upper end outlet of the cyclone separator is connected with a flue gas tail gas treatment system; and a bottom outlet of the cyclone separator is connected with a material returning system through avertical pipe, and the material returning system is connected with a material returning inlet of the circulating fluidized bed boiler. The system is reasonable in structure, the change of an originalCFB boiler system is small, the heat value of the waste blades is fully utilized, and centralized, harmless and resource treatment of the waste blades is realized.

The invention relates to a method for processing Bayer process red mud through a calcification-carbonization one-step method and belongs to the field of environmental protection. The method comprises the steps of first mixing Bayer process red mud, lime and transition liquid, causing the transition liquid to be clear water or a solution with the mass concentration of Na2O not larger than 40 g/L, and calcifying the mixed pulp; causing the pulp after the transition not to undergo solid-liquid separation, directly adding pressurized gas containing a CO2 component into a reaction system, and performing a carbonization transition reaction; causing the pulp having undergone the carbonization transition to undergo solid-liquid separation, obtaining tailings and a liquid phase, causing the tailings to undergo aluminum hydroxide extraction through soluble aluminum mother liquid and then serve as a cement industry raw material or soil, and causing the liquid phase to return a Bayer process system. According to the method, red mud no-alkalinization and aluminum oxide recycling can be achieved through calcification-carbonization one-step transition processing, and the method is an energy-saving environment-friendly Bayer process red mud short process processing method.

The invention relates to a method for cleanly extracting vanadium pentexide from a vanadium containing material. The method is characterized in that: the vanadium containing material is milled by the wet method, and then mixed with a certain weight amount of sulfuric acid, vanadic acid, water, sulfuric acid or phosphoric acid salt having certain association; under conditions of set temperature and set time, performing three-stage reflux leaching reaction of the mixture; adding ammonia sulfate and reducing iron powder to reaction leach solution in sequence to obtain aluminum ammonium sulfate crystals and ammonium ferrous sulfate crystals respectively; adding sulfuric acid to the solution in which aluminum and iron are separated out, cooling the solution for crystallization to obtain vanadium sulfate acyl crystals, and returning the mother liquor to extract vanadium ores; performing the neutralization reaction of the vanadium sulfate acyl crystals and ammonia water to obtain a precipitate of vanadium hydroxide, and returning the solution of ammonia sulfate to precipitate the aluminum and iron; and calcining the vanadium hydroxide and oxygen gas at a high temperature of over 300 DEG C to obtain the vanadium pentexide. The method has the advantages of short process flow, less energy consumption, high vanadium yield, low production cost, environmental protection, and comprehensive utilization of valuable metallic elements in ores.

The invention discloses a processing method of applying waste desulfurizing agents to sintering. The processing method includes the following steps that the waste desulfurizing agents are crushed intoparticles with the granularity smaller than 8 mm accounting for 100%, and with the granularity smaller than 1 mm accounting for 10%; evenly mixed powder is obtained by evenly mixing the crushed wastedesulfurizing agents and iron ore powder; evenly mixed ore powder is obtained by burying the evenly mixed powder in an iron ore powder pile; evenly mixed sintering powder is obtained by mixing the evenly mixed ore powder, iron ore powder, solid fuel, fluxing agents and return fines; water is added to the evenly mixed sintering powder to be subject to mixing and pelletizing to form evenly mixed sintering powder; sintered ore and sintering flue gas are obtained by sintering the pelletized materials; and the sintering flue gas is exhausted into the atmosphere after being subjected to desulfurization and denitrification. According to the processing method, the waste desulfurizing agents are crushed and then matched with the iron ore powder for sintering, the sintered ore is obtained for blastfurnace ironmaking, and iron, calcium and magnesium are recycled. Activated carbon absorbing sulfur dioxide can be used for desorbing the sulfur dioxide and making acid so as to recover sulfur. Thus,harmless disposal of the waste desulfurizing agents is carried out, and resource utilization of the waste desulfurizing agents is achieved.

The invention relates to a method for recovering glucomannan and protein in konjac flying powder by the enzyme process, which comprises the following process steps: (1) liquification: adding alpha-amylase into water solution of the konjac flying powder and liquifying till starch is fully degraded; (2) saccharification: adding amyloglucosidase into solution in the step (1) for saccharification; (3) centrifugation: regulating the pH of the solution in the step (2) to 3.5-5.0, centrifugating and getting precipitate; (4) acid washing: adding water into the precipitate in the step (3), regulating the pH of the solution to acidic condition, stirring, centrifugating, and getting the precipitate; and (5) drying: regulating the pH of the precipitate after the acid washing of the step (4) to be neutral, drying and finally getting a final extract. The process flow is simple, the operation is easy, the content of the glucomannan and crude protein in the got extract is high, and the extract can be used as a high-quality feed or a protein raw material and the like; and a stinking matter of trimethylamine and an antinutritional factor of tannin can be effectively removed.

The invention relates to Fe<3+> antibiotic fungi residue activated carbon as well as a preparation method and application thereof. The preparation method comprises the following steps: drying and grinding antibiotic fungi residues; dipping the ground fungi residues in a Fe<3+> salt solution, oscillating and filtering; drying the filtered fungi residues; baking the dried fungi residues, cooling, washing and drying to obtain the activated carbon. The preparation method is simple to operate, and can realize harmless utilization of the antibiotic fungi residues; in addition, the preparation methodcan be used for increasing the loading capacity of Fe<3+>, and also can increase the internal micropore amount of the activated carbon; the Fe<3+> antibiotic fungi residue activated carbon prepared by the method has the characteristics of being large in specific surface area, dense in internal micropores and high in porosity and content of the loaded Fe<3+>.

The invention discloses a thermal insulation mortar for building external walls. The thermal insulation mortar consists of sulfate aluminium cement, papermaking sewage sludge ash, polystyrene granules, glazed hollow beads, cellulose ether, an air-entraining agent, a polycarboxylate superplasticizer, alkali-resistant glass fibers and water, and further discloses a preparation method of the thermal insulation mortar. As paper mill sludge ash replaces part of cement, the compactness and the water resistance are very good, the thermal insulation mortar is stable in physical property, free of cracks, ageing-resistant, long in service life and excellent in thermal insulation performance. Not only is harmless utilization of paper mill sludge ash realized to protect the environment, but also resources are saved, waste is changed into valuable, the consumption of cement is reduced, the cost is lowered, and favorable economic and social benefits are achieved. The preparation method is simple, can be completed according to the conventional technology and is low in production cost.

The invention provides a preparation method for a black ceramic pigment. The preparation method comprises the following steps: 1) uniformly mixing electric furnace smelting stainless steel fly ash containing an iron element with chromic oxide, nickel monoxide and manganese monoxide according to a molar ratio of Fe to Cr to Ni to Mn being equal to1:(0.8-1.3):(0.5-1.1):(0.7-1.2), so as to obtain a mixture material; and 2) placing the mixture material in a microwave field, microwave-heating in an air atmosphere, while a temperature of the mixture material rises to 1050-1200 DEG C, preserving heatfor 10-20 min, taking out the roasted material from the microwave field, and cooling to room temperature, so as to prepare the black ceramic pigment. The method uses the industrial solid waste electric furnace smelting stainless steel fly ash as a raw material, so that while transition metal elements richly contained in the fly ash are greatly used, the effect on the environment by emission thereof is eliminated, and defects that sintering time is long, a needed temperature is high and energy consumption is high caused by of preparing the black ceramic pigment by using an industrial solid waste currently. The prepared black ceramic pigment has the characteristics of high blackness, pure color generation and good coloring property.

The invention belongs to the technical field of comprehensive utilization of biomass and livestock and poultry manure, and particularly relates to a poly-generation method employing coupling of biomass with livestock and poultry manure. The poly-generation method comprises the following steps: burning straws to generate power so as to provide heat, pretreating the straws and the livestock and poultry manure, respectively hydrolyzing and acidifying the straws and livestock and poultry manure, feeding the straws and livestock and poultry manure having been hydrolyzed and acidified into a CSTR anaerobic fermentation tank, allowing the hydrolyzed and acidified straw and livestock and poultry manure to undergo medium-temperature anaerobic fermentation in the CSTR anaerobic fermentation tank so as to obtain biogas and biogas slurry, subjecting the biogas slurry to solid-liquid separation before preparation of an organic fertilizer from the biogas slurry, and subjecting the biogas to drying, gas-water separation, desulfurization and filtration before preparation of natural gas from the biogas. According to the invention, the straw and the livestock and poultry manure are coupled and recycled to generate electricity, heat, cold, biogas and organic fertilizer, so harmless utilization of resources is realized.

The invention relates to a constructional ceramic prepared from copper-molybdenum tailings. The ceramic is composed of the following components in parts by weight: 20 to 70 parts of copper-molybdenum tailings, 10 to 35 parts of diopside, 10 to 40 parts of Laiyang soil, and 0 to 10 parts of feldspar. The added tailing can account for 70% of the weight of ceramic wall tile and ceramic floor tile, the tailing is converted into valuable resources, the environment pollution is avoided, the environment is protected, the ceramic raw material shortage is relieved, and the production cost for the ceramic industry is reduced.

The invention discloses an industrial treatment method for sintering red mud. The industrial treatment method of the sintering red mud is characterized by comprising the following steps of (1) conducting separation and washing, wherein the sintering red mud is rapidly separated from raw liquor and washed, and red mud slurry is obtained; (2) conducting mixing, lime is added to the red mud slurry, grinding and stirring are conducted, and then the red mud slurry mixture is obtained; (3) conducting calcification, wherein the red mud slurry mixture is calcified, and then calcified red mud slurry isobtained and the like. The main ingredients of tailings obtained after the sintering red mud is treated are calcium silicate and calcium carbonate, the tailings can be directly used for the cement industry and can also be used for soil treatment, and therefore harmless utilization of the red mud in the aluminum oxide production process is achieved. The content of Na2O in the tailings generated after the sintering red mud is treated is below 1%, and the environment-friendly requirement is met.

The invention discloses a drying furnace for household garbage and a drying method. The drying method includes the following steps that firstly, the household garbage is preprocessed so that loose and uniform to-be-processed garbage can be obtained; secondly, the to-be-processed garbage is placed in the drying furnace to be dried, the drying temperature is 100 DEG C to 140 DEG C, the machine speed is 15 r/min to 20 r/min, the drying time is 3 min to 8 min, and the to-be-processed garbage is blown into a suspended state in the drying process; and thirdly, air separation is performed, wherein the dried garbage is subjected to air separation so that small-specific-gravity garbage and large-specific-gravity garbage can be obtained, and the small-specific-gravity garbage and the large-specific-gravity garbage are packaged and subjected to resource utilization. The drying furnace for the household garbage is further included in the invention. By means of the drying furnace for the household garbage and the drying method, firstly, secondary pollution in the processing process can be effectively eliminated; secondly, the processing cost can be greatly reduced, the processing efficiency is improved, and reduction, reclamation and harmlessness of the household garbage are efficiently and fast achieved.

The invention discloses an oil-contained sludge pyrolysis-combustion coupled double-bed treatment process. A process system comprises an oil-contained sludge drying system, a combustion system and a fluidized bed incineration system, wherein the drying system comprises a feeding machine, a drying unit, a storage tank and the like, the combustion system comprises a combustion furnace, a nitrogen gas cylinder set, a re-circulating fan, a refeeder, a belt conveyor, a dried oil-contained sludge feeding machine, a pyrolysis gas outlet and the like, and the fluidized bed incineration system comprises a circulating fluidized bed boiler, an auxiliary fuel feeding machine, a cyclone separator, a refeeder, a flue, a dust remover, a desulfurization tower, a chimney, an air supply machine, a high-pressure fluidization fan and the like. Oil-contained sludge enters the combustion furnace to be combusted after being dried, hot flue gas enters a pyrolysis furnace to provide heat required by pyrolysis,pyrolyzed oil-contained sludge coke is returned to a combustion chamber to be incinerated under the action of fluidization air provided by the nitrogen gas cylinder set, the incinerated flue gas is purified and then discharged through the chimney, and through the process, reduction, recycling and harmless comprehensive utilization of the oil-contained sludge is realized.

The invention relates to a method for separating iron and aluminum from red mud, which comprises the following steps: (1) sequentially carrying out pretreatment, acid leaching and solid-liquid separation on the red mud to obtain a leaching solution; (2) carrying out coprecipitation treatment on the leachate obtained in the step (1), and then carrying out solid-liquid separation to obtain a precipitate; and (3) carrying out alkaline leaching treatment on the precipitate obtained in the step (2), and then carrying out solid-liquid separation to obtain a solution containing NaAlO2 and filter residues containing Fe (OH) 3. The method for separating the iron and the aluminum in the red mud can be connected in series with the aluminum oxide industry and the iron and steel industry, effective separation and recovery of the iron and the aluminum are achieved, the treatment cost is low, and secondary pollution is avoided.

The invention provides a method for preparing exterior wall paint by utilizing paper mill sludge. The exterior wall paint is prepared from the following components in a paint dispersion machine: 2.5 to 3.5 parts of a polyacrylate emulsion with the solid content being 50%, 55 to 65 parts of a sodium carboxymethyl cellulose aqueous solution with the solid content being 2%, paper mill sludge with the dry component being 25 to 30 parts, 2.5 to 3.5 parts of pigment, 0.2 part of a defoaming agent, and 1 part of a preservative; the preparation process of the exterior wall paint in the paint dispersion machine is that the sodium carboxymethyl cellulose solution is added into the paint dispersion machine, and the paper mill sludge, the pigment, the defoaming agent and the preservative are added in sequence at the revolving speed of 1000 to 2000 rpm (revolutions per minute), and stirred for 30 to 5o minutes; then the polyacrylate emulsion is added, and stirred for 15 to 20 minutes to obtain the exterior wall paint. The preparation method of the paint provided by the invention has the characteristics that the operation is simple and easy operation and the quality and performance of the paint are excellent, thereby providing an effective way for resource utilization of paper mill sludge waste.