44results about How to "Realize waste treatment" patented technology

The invention provides concrete containing refining slag and a preparation method of the concrete. The preparation method comprises the following steps: firstly, grinding and uniformly mixing the following components based on dry base by mass percent: 55 to 75 percent of slag, 15 to 35 percent of the refining slag and 10 to 20 percent of industrial by-product gypsum to obtain a cementing material;secondly, adding water into 15 to 50 percent of the cementing material, 50 to 85 percent of aggregate and 0 to 3 percent of water reducing agent for uniformly stirring, and carrying out pouring molding and curing to obtain a qualified concrete material. According to the preparation method of the concrete, disclosed by the invention, the key problem of poor stability of the refining slag is solved, a whole solid waste system cementing material is prepared by playing the gelling property and the synergistic excitation effect of the slag, and further the concrete material is prepared. The metallurgical industry solid waste refining slag and the industrial by-product gypsum are cooperatively treated; the refining slag can be comprehensively utilized to the maximum extent, resource utilizationrate is improved, environmental load is reduced and the comprehensive resource utilization rate of metallurgical slag in China is obviously improved; meanwhile, the production cost of the concrete isreduced and obvious economic benefits are obtained.

The invention relates to a treating method of high-concentration heavy metal polluted building waste. The method includes: stripping surfaces of the building waste, smashing, washing, separating solid and liquid to obtain the cleaned building waste the water-soluble heavy metal of which is removed, adding an isopropylamine glyphosate solution into the cleaned building waste, eluting to remove the heavy metals, adjusting the pH value to be neutral, separating solid and liquid, washing the waste after elution with water and separating solid and liquid. The heavy metal contents in the building waste after air drying are lower than the three-level standard thresholds of the environmental quality standards (GB15618-1995). The building waste after air drying is subjected to a leaching test by utilization of an HJ/T229 leaching method, and the heavy metal contents in the leachate are lower than the thresholds of the standards for hazardous wastes (GB5085.3-2007). The building waste after air drying can be directly buried and stacked without pollution to the soil, and can be used as a regenerated roadbed material and a concrete aggregate. The method is simple in process and capable of completely eliminating the hazard of the polluted building waste, and has good environmental benefit, economic benefit and social benefit.

The invention discloses a method of treating garbage seeping liquid and a special device thereof. The device of treating the garbage seeping liquid provided by the invention comprises two garbage reactors 1 connected in series and a garbage reactor 2. The garbage reactors 1 and the garbage reactor 2 comprise a pool body, a water distribution device and a vent-pipe. The top part of the pool body is open and the bottom is provided with a through hole. The water distribution device is used for leading the garbage seeping liquid towards the pool body. The vent-pipe is arranged vertically in the tank body to be used for the ventilation. The application of the device of treating the garbage seeping liquid of the invention can realize the sustainable yield of a garbage land fill filed, and achieve the zero draining purpose of the seeping liquid.

The invention discloses a method for processing rubbish filtration and the special apparatus. The method for processing rubbish filtration has the advantages that (1) resolving the problem of blocking of the waste reactor, (2) accelerating stabilization of the rubbish for detecting and shortening the landfill waste cycle and filtration processing cycle, (3) achieving zero discharge of the filtration, (4) realizing the sustainable development of the landfill waste site, (5) can flexibly control the recharge rage.

The invention discloses a method for preparing a soil conditioner by utilizing steel slag, belonging to the field of comprehensive utilization of resources, and comprising the following five steps: screening, burdening, mixing, pelletizing and bagging. The method for preparing the soil conditioner by utilizing the steel slag is characterized by screening out steel slag with the size less than 3 mm, burdening 25-40 wt% of the steel slag and 75-60 wt% of vinegar residue, mixing, and utilizing a cylindrical pelletizer to carrying out pelletizing and granulating. The invention can process the steel slag in large scale, improves soil fertility, improves crop output and quality, has low manufacture cost and realizes the purpose of industrially using waste to treat waste.

The invention provides a method for preparing an Al-Si-Fe alloy by preprocessing a waste fireproof material and carbon thermal reduction. The method for preparing the Al-Si-Fe alloy by preprocessing the waste fireproof material and carbon thermal reduction comprises the steps that the waste fireproof material, waste negative electrode carbon blocks and paper pulp dry powder are uniformly mixed andmade into powder; then the mixed material is compressed into pellets, high temperature vacuum distillation is conducted so that fluoride in the waste fireproof material and the waste negative electrode carbon blocks volatilize, then the fluoride is separated from the waste fireproof material and the waste negative electrode carbon blocks, and meanwhile, cyanide in the waste negative electrode carbon blocks is decomposed; then distillation residues are smashed and dispensed and mixed with coal ash, and fixed carbon in the waste negative electrode carbon blocks is adopted as a reducing agent inan electric arc furnace so that high temperature reduction can be conducted on a material with aluminum oxide and silicon oxide being the main components, and then the Al-Si-Fe alloy with certain components is prepared; and meanwhile, decomposition of aluminum nitride in aluminum ash and total decomposition of cyanide in the waste negative electrode carbon blocks are completed in the high temperature reduction process, and comprehensive utilization of multiple hazardous wastes and solid wastes is achieved in the same technology.

The invention relates to a FCC regeneration flue gas treatment method which comprises the steps: (1) carrying out split-flow treatment on a waste alkali liquor, acidifying a part of the waste alkali liquor, and reacting generated gas with FCC regeneration flue gas; (2) introducing an obtained desulfurized flue gas into a cellulosic algae SS-B7 culture system in an illumination reactor, culturing for a period of time, and introducing air and/or oxygen; (3) adding solid NaOH into a rest waste alkali liquor to convert sodium hydrosulfide into sodium sulfide; (4) reacting a flue gas collected in the step (2) with the waste alkali liquor in the step (3), acidifying an obtained liquid phase in the step (1), and discharging purified gas; and (5) carrying out multiple-effect evaporation treatmenton awaste liquid collected in the step (1). According to the characteristics of propylene refining waste alkali liquid, split-flow treatment is carried out and is used for different stages of FCC regeneration flue gas treatment, SOx and NOx in the FCC regeneration flue gas can be efficiently removed, meanwhile, sulfides in the waste alkali liquid are removed, and generated sodium salt is recycled.

The invention provides a purification method for industrial emission gas. The purification method for the industrial emission gas includes the following the steps: (1) mixing silico-calcium residues into silico-calcium seriflux; and (2) enabling the silico-calcium seriflux to enter an absorption tower from top to bottom, enabling the industrial emission gas to enter the absorption tower from top to bottom, and enabling the silico-calcium seriflux to contact the industrial emission gas. The silico-calcium seriflux enters the absorption tower from top to bottom, the industrial emission gas enters the absorption tower from top to bottom, the silico-calcium seriflux and the industrial emission gas are enabled to conduct convection, full contact of the silico-calcium seriflux and the industrial emission gas is achieved, absorption effect of carbon dioxide is improved, and emission reduction of carbon dioxide is effectively achieved. The waste resource silico-calcium residues are used as raw materials to purify the industrial emission gas, and using waste to treat waste is achieved. Besides, the industrial emission gas is effectively purified, and meanwhile alkali content in the industrial waste material silico-calcium residues is reduced, and the industrial waste material silico-calcium residues are enabled to meet requirements of mixed additives and cement clinker raw materials. The purification method for the industrial emission gas possesses good social benefit and environment benefit, and meanwhile possesses good economic benefit.

The invention discloses a method for Ni-Fe alloy production and Sn recovery from Ni-Sn ferroalloy scrap by high-sulfur coal sulfuration volatilization and oxidation slagging. The method is characterized by comprising the process steps as follows: the Ni-Sn ferroalloy scrap is crushed to certain blockness, transferred into an intermediate frequency furnace or an electric furnace and then heated to certain temperature, a nitrogen gas spray gun is inserted into a molten pool for stirring after the material is in a molten state, and the high-sulfur coal is crushed to certain granularity and sprayed into the molten pool for a sulfuration volatilization reaction of Sn in the material; after the sulfuration reaction is finished, the high-sulfur coal is stopped from being sprayed into the furnace, certain slagging constituent is added into the molten pool for Ni-Fe liquid purification, and certain alkalinity of the molten pool is controlled in the process; after certain period, slag and Fe are completely separated, produced Ni-Fe liquid and slag are discharged from a Fe outlet and a slag outlet respectively, and resources including Ni, Fe and Sn are recovered effectively in the process. According to the method, the characteristic of high sulphur content of the high-sulfur coal is sufficiently utilized for Sn sulfidation treatment of the Ni-Sn ferroalloy scrap, the resources including Ni, Fe and Sn are recovered effectively, waste is treated by waste, the technological process is simple to operate, the production cost is lower, and broader industrial prospect is provided.

The invention provides a direct-reduction ironmaking device and method based on blast furnace slag waste heat utilization. The device comprises a granulating device and a moving bed reduction device. By means of the device, liquid blast furnace slag is made into high-temperature furnace slag granules, the granules are loaded with a reducing agent and used as a heat carrier to be in direct contact with iron ore powder, and the iron ore powder generates a direct reduction reaction for production and direct-reduction ironmaking. According to the technical scheme, waste heat of the blast furnace slag is adopted as an iron ore powder direct-reduction heat source, the furnace slag heat carrier loaded with the reducing agent is in direct contact with the iron ore powder granules, and therefore efficient heat exchange and mass transfer of the reduction reaction are achieved, the waste heat of the blast furnace slag is efficiently recycled, and low-cost and efficient production of direct-reduced iron is achieved.

The invention discloses an oyster shell powder modified water treatment agent as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing oyster shell powder, polyacrylamide (PAM) and a solvent, and adding a pH adjusting agent to adjust the pH; performing ultrasonic emulsification, performing stirring heating at 50-90 DEG C for 30-150 min, performing cooling to a room temperature, performing centrifugal separation, performing drying crushing, and performing sieving to obtain modified oyster shell powder; and uniformly mixing the modified oyster shell powder and carboxymethyl cellulose sodium, performing natural drying, performing calcination at medium and low temperature, and performing cooling to obtain the oyster shell powder modified water treatment agent. The oyster shell powder modified water treatment agent provided by the invention has a faster and more efficient adsorption effect on heavy metal ions such as Ni<2+>, Co<2+> and Cu<2+>, and excellent stability and durability, effectively realizes the purpose of using waste to treat waste, belongs to high-efficiency environmentally-friendly adsorption separation materials, and has good application value.

The invention relates to a method for treating sulfur dioxide flue gas by using alkaline waste residues and recovering tin-antimony metals and sodium sulfite crystals. The method comprises the following steps: crushing and dissolving the alkaline waste residues, performing filtration to obtain a NaOH, Na2SnO3 and Na3SbO4 mixed solution and filter residues, carrying out an absorption reaction on the mixed solution and SO2 contained in industrially discharged flue gas in an absorption device to make the SO2 content of the flue gas reach discharge standards and obtain a mixed slurry containing Sn(OH)4 and Sb(OH)5 solid precipitates and a Na2SO3 solution, and carrying out solid-liquid separation on the slurry to obtain Sn(OH)4 and Sb(OH)5 solid precipitates and the Na2SO3 solution; and addingthe filter residues and the Sn(OH)4 and Sb(OH)5 solid precipitates to reduced coal, carrying out high-temperature reduction smelting to obtain tin-antimony metals and smelting furnace slag, and further carrying out evaporative concentration and separation on the Na2SO3 solution to obtain the sodium sulfite crystals. The method has the advantages of short process flow, high recovery rate of the tin-bismuth metals, realization of treatment of wastes with wastes, and clean and environmentally-friendly production process.

The invention relates to a treatment method and a treatment device for FCC regeneration flue gas. The treatment method comprises the following steps: carrying out split-flow treatment on propylene refining waste alkali liquor, acidifying part of the propylene refining waste alkali liquor in an acidifying treater, and carrying out a reaction on the acidified gas and the FCC regeneration flue gas ina desulfuration reactor to recover generated single element sulfur; adding solid sodium hydroxide into the residual propylene refining waste alkali liquor, wherein sodium bisulfide in the waste alkali liquor is fully converted into sodium sulfate, oxidizing NO in the desulfurated flue gas into NO2 to react with the waste alkali liquor, a liquid phase enters the acidifying treater and purified gasis discharged; and carrying out multiple-effect evaporation on the acidified waste liquor to recover sodium salt. The treatment method can remove SOx and NOx in the FCC regeneration flue gas effectively and remove sulfides in the waste alkali liquor simultaneously to recover the generated sodium salt. The treatment device treats wastes with wastes, so that the treatment device is economical and environment-friendly.

The invention provides a desulfurization and denitrification agent and a preparation method and application thereof, and the desulfurization and denitrification agent comprises the following components in parts by weight: 1-20 parts of granular waste SCR (Selective Catalytic Reduction) denitrification catalyst, 10-70 parts of granular denitrification agent, 10-70 parts of granular desulfurizing agent, 1-20 parts of granular silicate and 1-5 parts of granular combustion improver. According to the desulfurization and denitrification agent, the granular waste SCR denitrification catalyst is added, in the desulfurization and denitrification process, the granular waste SCR denitrification catalyst is converted into an effective catalyst through high temperature, and then the effective catalyst is combined with the desulfurizing agent, the denitrification agent and the combustion improver, so that the desulfurization and denitrification effects are effectively improved; while the waste SCR denitration catalyst is treated, the flue gas treatment effect is improved, and treatment of waste with waste is achieved.

The invention discloses a polysilicate iron/cationic starch composite flocculant and a preparation method thereof. According to the invention, titanium dioxide waste acid, cationic starch, a sodium silicate solution, lime milk, hydrogen peroxide and an alkali are used as raw materials, a polysilicate iron flocculant is prepared by using the titanium dioxide waste acid, and the polysilicate iron and the cationic starch are compounded through a copolymerization method to successfully prepare the polysilicate iron/cationic starch composite flocculant, wherein the prepared polysilicate iron/cationic starch composite flocculant has good adsorption and flocculation effects on the turbidity, the chromaticity removal rate, the COD, the total nitrogen and the total phosphorus of breeding wastewater; and the method is simple in process and low in cost, turns titanium dioxide waste acid into wealth, treats pollution of breeding wastewater, achieves the treatment of waste with waste, and providesa new way for resource utilization of titanium dioxide waste acid.