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164 results about "Combined technique" patented technology

Combination technique for processing and recycling high-cyanogen high-ammonia high-salt organic waste water

InactiveCN101172743AProcess Combination ScienceReasonable process combinationWater contaminantsWater/sewage treatment bu osmosis/dialysisIndustrial waste waterCombined technique
The invention relates to a combined technique of treating and reusing the organic sewage which is rich in cyanogen, ammonia and salt, and adopts the combined techniques of acidified decyanation (with the sodium cyanide recollected), basified ammonia blowing (with ammonium salt recollected), oxidation by adding chlorine, biological treatment, precipitation and clarification, deep oxidation, biological active carbon filtering, one-time brine refining, microstraining film, and other combined techniques, and then the chlorine alkali is produced after the secondary brine refining in the chlorine alkali industry and the entrance into the ionic membrane electrobath. The combined technique can be used for treating the industrial sewage in the tricyanogen chloride, chlorine alkali, gold mine, galvanization and other industries and conduct recovery of the resources, thereby overcoming the disadvantages that the prior art has narrow applicability and treatment function and disappointing treatment result, cannot recollect the resources, and has high treatment cost and unobvious economical benefit. The combination of the technique is scientific and reasonable, the technique is novel, unique and mature, the treatment is good, and the combined technique has a plurality of functions, strong applicability, wide use range and remarkable environmental and economical benefit.
Owner:HAINAN CHENGTAI ENVIRONMENT ENG

Casting and forging combined technique of aluminum alloy linkage rod

InactiveCN101486087AEnsure billet qualitySimplify the traditional die forging processEngine componentsRheniumRare-earth element
The invention discloses technology for casting and forging an aluminum alloy connecting rod, wherein an aluminum alloy composition of the connecting rod is adjusted by addition of rare earth element in casting technology, and the addition of the rare earth element is 2 to 5 percent of an aluminum liquid; the aluminum alloy connecting rod is guaranteed to comprise the following compositions: 88 to 94 percent of aluminum, 3.8 to 4.9 percent of copper, 0.5 to 1.5 percent of silicon, 0.4 to 1.2 percent of manganese, 0.4 to 1.0 percent of magnesium, 0.8 to 1.8 percent of rhenium and 0.4 to 0.14 percent of iron; and a casting head is not cut off and reheated in the casting technology and taken as one part or a scrapped part of a forged piece, and casting afterheat is utilized for forging. The technology simplifies the prior die forging technology, improves reasonable floatation, the streamline and mechanical properties of casting metals, improves a metallurgical structure close to the casting head on the forged piece, and has the effects of high technological utilization rate of materials, shortened technological process and energy conservation and consumption reduction. Moreover, the casting and forging technology can obviously improve the internal quality and the mechanical properties of casting blanks, and the production cost of the casting blanks is lower than that of the prior die forging.
Owner:DANYANG RONGJIA PRECISION MACHINERY

Carbon-aerogel-carried bimetal organic framework electro-Fenton cathode and preparation method thereof

The invention relates to a carbon-aerogel-carried bimetal organic framework electro-Fenton cathode and a preparation method thereof. The preparation method comprises the following steps: by using a block carbon aerogel as a substrate electrode, carrying out hydrothermal reaction to load a bimetal organic framework onto the substrate electrode, filtering, washing, and carrying out vacuum drying to obtain the carbon-aerogel-carried bimetal organic framework electro-Fenton cathode, wherein the bimetal organic framework is a Fe / Co bimetal organic framework. Compared with the prior art, by combining the photocatalytic technique and electro-Fenton, the carbon-aerogel-carried bimetal organic framework electro-Fenton cathode can degrade organic pollutants by using the higher-efficiency low-energy-consumption advanced oxidation technique, thereby providing a new way for using the electro-Fenton cathode in the photocatalytic / electro-Fenton combined technique for treating nondegradable organic pollutants. The carbon-aerogel-carried bimetal organic framework electro-Fenton cathode has the advantages of simple technical operation, energy saving and high efficiency, and has very wide application range in the field of actual water treatment.
Owner:TONGJI UNIV

Three-dimensional braided carbon fiber reinforced polyetheretherketone composite material and preparation method thereof

The invention relates to a three-dimensional braided carbon fiber reinforced polyetheretherketone composite material and a preparation method thereof. Carbon fiber reinforced polyetheretherketone fiber, and carbon fiber which is used as the raw material and accounts for 18-54% by volume, are mixed and braided in a three-dimensional five-direction mode to obtain the three-dimensional braided carbon fiber reinforced polyetheretherketone composite material. The three-dimensional braided carbon fiber reinforced polyetheretherketone composite material is prepared from fibers by a braiding and hot compaction combined technique. The technological process comprises the following steps: carrying out three-dimensional mixing and braiding on the polyetheretherketone fiber and carbon fiber, carrying out solution oxidation pretreatment on the mixed fabric, repeatedly flushing with distilled water, drying, putting the mixed fabric into a die, and carrying out hot compaction. The invention can effectively overcome the difficulties in the preparation of the three-dimensional braided composite material due to the thermoplastic property of the polyetheretherketone, thereby obtaining the three-dimensional braided carbon fiber reinforced polyetheretherketone composite material which has the advantages of sufficient fiber immersion and excellent mechanical properties.
Owner:江苏飞荣达新材料科技有限公司

Treatment technique of tetrabromobisphenol A production wastewater

The invention discloses a treatment technique of tetrabromobisphenol A production wastewater, belonging to organic chemical industry wastewater recycling and harmless environmental-protection treatment technologies. The treatment technique of tetrabromobisphenol A production wastewater is an acidification precipitation-resin adsorption-advanced oxidation combined technique, and mainly comprises the following steps: 1. regulating the pH value of the wastewater to recycle the tribromophenol in the wastewater by acidification precipitation; 2. filling the wastewater, in which abundant tribromophenol is removed, into an adsorption column by using a macroporous adsorbent resin subjected to conventional pretreatment, and passing the wastewater through a bed bottom at a certain flow rate so that chlorobenzene is adsorbed by the resin, wherein the resin adsorption is utilized to remove most chlorobenzene, bisphenol A and other nondegradable organic substances in the recycled wastewater, thereby effectively reducing COD (chemical oxygen demand) of the wastewater and relieving the treatment load of the wastewater; and 3. carrying out electrocatalytic oxidation on the wastewater subjected to acidification precipitation-resin adsorption to finally remove harmful and nondegradable substances in the wastewater, thereby achieving the goal of harmless discharge after reaching the standard.
Owner:TIANJIN POLYTECHNIC UNIV

Method for treating garbage leachate

The invention discloses a method for treating garbage leachate. The method treats the garbage leachate by using the combined technique of pretreatment, biochemical treatment and advanced treatment, wherein the pretreatment adopts a method of coagulating sedimentation, reduces the concentration of organic matters, ammonia nitrogen and metallics, and reduces the inhibiting effect on the subsequent biochemical treatment; the biochemical treatment uses an anaerobic process, an A/O process and SBR to biochemically degrade wastewater, thereby simultaneously removing the organic matters and achieving the goal of denitrification; and finally, Fenton advanced oxidation and air flotation are used for carrying out the advanced treatment, and the strong oxidizing property of hydroxyl free radicals is utilized to oxidize the organic matters, which are difficult to be biochemically degraded, in waste water, thereby ensuring that the outlet water is discharged after reaching the standard. The invention has the advantages of simple operation of the technique, low operating cost, good treatment effect, no secondary pollution and the like, and the advanced treatment can ensure that the outlet water is discharged after reaching the standard. The outlet water meets the standard for pollution control on the landfill site of municipal solid waste (GB 16889-2008).
Owner:GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH

Combined technique of separating and recycling VOCS (volatile organic compounds) from industrial waste gas by adsorption-desorption-rectification-pervaporation

The invention relates to a combined technique of separating and recycling VOCS (volatile organic compounds) from industrial waste gas by adsorption-desorption-rectification-pervaporation, which comprises the following steps: drying, cooling and filtering the industrial waste gas containing the VOCS, then conveying into a plurality of adsorption-desorption groups to carry out adsorption-desorption operation, uniformly spraying through upper parts of adsorption-desorption devices by saturated vapor with the pressure at 0.15-0.5MPa, heating GAC (granular active carbon) or ACF (active carbon fiber) to desorb the adsorbed VOCS; after finishing the desorption, entering the next adsorption, using the VOCS-containing saturated vapor desorbed by the vapor in a pervaporation membrane for separation and heat supply. The combined technique provided by the invention forms an impact and enclosed circulation to sufficiently recycle the VOCS from the waste gas. The VOCS-containing saturated vapor desorbed by the saturated vapor contains large amount of latent heat and sensible heat, and the sensible heat of residual liquid on the bottom of a rectification tower is utilized sufficiently.
Owner:武汉旭日华环保科技股份有限公司

Forming method for large high-modulus ellipsoidal molded surface hemispherical shell of aluminum alloy storage box

The invention relates to a forming method of a large high-modulus thin-wall ellipsoidal molded surface hemispherical shell of an aluminum alloy storage box for spaceflight and belongs to the technicalfield of storage box forming. A round plate blank is used for direct precise numerical-control spinning forming of the large high-modulus ellipsoidal molded surface hemispherical shell of the aluminum alloy storage box, and auxiliary working procedures such as pre-forming and intermediate heat-treatment are not needed; through the technical design and precise control, the combined technique of heat conventional spinning and then heat power spinning at the first stage and heat conventional spinning at the second stage is adopted, and the large high-modulus ellipsoidal molded surface hemispherical shell of the aluminum alloy storage box can be precisely formed only by using a spinning block, through clamping at a time and in one numerical-control program, so that the technical process is shortened, the production efficiency is improved, and the forming precision of a member can be greatly improved; and a unilateral gap between the inner molded surface of the formed ellipsoidal molded surface hemispherical shell and a theoretical molded surface template is smaller than 0.2 mm, and the wall thickness difference of the inner molded surface of the formed ellipsoidal molded surface hemispherical shell and the theoretical molded surface template is smaller than 0.2 mm.
Owner:AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1

Method for treating organic wastewater by photoelectric combined technique

The invention discloses a method for treating organic wastewater by a photoelectric combined technique. A photocatalyst and three-dimensional electrodes are synergically utilized to treat organic wastewater, wherein the main anode is a boron-doped diamond film electrode, the main cathode is stainless steel, and the filled particle electrode material is composed of carbon nano fibers and calcium alginate microspheres. The catalyst generates holes with strong oxidizing property under the light irradiation; the high-catalytic-activity three-dimensional electrode materials are combined to generate higher oxygen overpotential and generate active oxygen substances (such as hydroxy free radical -OH, H2O2, -OOH, -O and the like); C-N, N-N, N=O and other bonds in toxic and nondegradable wastewater containing unsymmetrical dimethylhydrazine, nitrosodimethylamine and the like are ruptured and efficiently degraded into carbon dioxide, water, ammonium salt NH4<+> and the like; and COD (chemical oxygen demand) in the wastewater is greatly removed under neutral room-temperature conditions. The method has the advantages of high efficiency of combined oxidation treatment and no secondary pollution, and is an efficient method for treating nondegradable wastewater.
Owner:SOUTHEAST UNIV
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