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42results about How to "The process is simple and easy to operate" patented technology

Treatment technique suitable for high salt and high concentrated organic wastewater

The invention provides a treatment process applicable to high-salinity high-concentration organic wastewater. Aiming at three types of high-salinity high-concentration organic wastewater (wherein contained salts are NH4Cl, MgCl2 and MgSO4), the invention adopts physical adsorption, oil-phase and aqueous-phase separation, coagulation and air-flotation, oxidation, concentration and crystallization, oxidation, biological treatment and a series of processes for treatment. The treatment process removes COD and NH3-N in the wastewater, ensures that the pH value of the wastewater can meet the secondary discharge standard of the petrochemical industry class in Integrated Wastewater Discharge Standard (GB8978-1996), and can recover useful salt materials, namely NH4Cl, MgCl2.6H2O and MgSO4.7H2O (content accounts for 10 to 20 percent of raw water) from the three types of wastewater. The treatment process obtains remarkable economic benefit at the same time of treating sewage, and can also be used for reducing the cost for sewage treatment. The treatment process has the advantages of low cost, high efficiency, easy operation and no secondary pollution, and is applicable to the treatment of the high-salinity high-concentration organic wastewater.
Owner:YUNNAN UNIV

Preparation method and application of novel silver-nanoparticle modified ultrathin graphite phase carbon nitride catalyst

The invention discloses a preparation method and application of a novel silver-nanoparticle modified ultrathin graphite phase carbon nitride catalyst. The method includes: subjecting urea to heat treatment to obtain lump graphite phase carbon nitride; subjecting the lump graphite phase carbon nitride to secondary heat treatment to obtain an annealing etched ultrathin graphite phase carbon nitridelayer; structuring a bionic mussel polydopamine biocoating on ultrathin graphite phase carbon nitride by adopting an impregnation method; based on polydopamine modification and by the aid of reducibility of silver nanoparticles, loading the silver nanoparticles on the surface of the ultrathin graphite phase carbon nitride. The two-dimensional ultrathin graphite phase carbon nitride layer is prepared by adopting the high-temperature annealing method, the silver nanoparticles are prepared by adopting the green bionic method of self-polymerization polydopamine, and good prospects of the novel composite high-activity photocatalyst are displayed in the field of organic pollutants like photocatalytic degradation of methylene blue and phenol.
Owner:NANTONG TEXTILE & SILK IND TECH RES INST

Method for treatment of high-salinity and high-concentration organic wastewater through process of high-efficiency photocatalytic vacuum separation of gas phase, liquid phase and solid phase

The invention relates to a method for treatment of high-salinity and high-concentration organic wastewater (wherein salts can be NH4Cl, MgCl2, MgSO4, NaCl, Na2SO4, Na2HPO4 and the like) through a series of processes comprising pretreatment, pH adjustment, high-efficiency photocatalytic separation of gas phase, liquid phase and solid phase and advanced treatment. When the invention is used, the effluent quality can meet the requirements of secondary discharge standards of the category of petroleum and chemical in the Integrated Wastewater Discharge Standard (GB8978-1996), and salt can be recycled from wastewater. In addition, in order to avoid secondary pollution, the invention realizes the photocatalytic treatment of exhaust generated by the high-efficiency photocatalytic separation of the gas phase, the liquid phase and the solid phase, and most of the organic substances in the exhaust can be degraded to remove odor. Moreover, the invention proposes the view of treating waste with waste, namely, feeding the exhaust generated by wastewater into raw wastewater or other kinds of raw wastewater, thereby reducing the exhaust emission and further lowering the difficulty in photocatalytic treatment of the exhaust. The invention has the advantages of low cost, high efficiency, easy operation and no secondary pollution, and is applicable to the treatment of high-salinity and high-concentration organic wastewater.
Owner:YUNNAN UNIV

Production technology of high viscosity sodium carboxymethyl cellulose

The invention relates to a production technology of high viscosity sodium carboxymethyl cellulose. The production technology comprises the steps of washing raw materials; smashing; conducting an alkalization reaction, wherein smashed cotton clothes and cotton fabric are put into an alkalization kneading machine, air in the alkalization kneading machine is pumped out and inert gas is pumped into the alkalization kneading machine, the step is repeated for multiple times until vacuum degree in the alkalization kneading machine reaches 0.005 Mpa, and the alkalization reaction is conducted under the protection of the inert gas; conducting an etherification reaction, wherein the alkalized product is put into an etherification kneading machine to be subjected to the etherification reaction; washing; neutralization; centrifugation; drying; obtaining the product after smashing. According to the production technology of the high viscosity sodium carboxymethyl cellulos, discarded cotton clothes and cotton fabric are adopted as raw materials, waste is turned into wealth, the production cost is drastically reduced, the technology is easy to operate, the side product is less, the quality index of the obtained product reaches viscosity 1% B type (Brookfield Viscosity)>7000 mpa.s, the substituted ratio is bigger than 0.95, and the purity is bigger than 99.5%.
Owner:TIANJIN RUNSHENG CELLULOSE TECH

Method for reinforcing surface stability of core of honeycomb-like porous structure by hot film blowing and breaking method

The invention belongs to the technical field of composite materials, and relates to a technological method for reinforcing the surface stability of a core of a honeycomb-like porous structure in the manufacturing process of a honeycomb core sandwich structure in an aerospace craft, and particularly relates to a method for reinforcing the surface stability of the core of a honeycomb-like porous structure by a hot film blowing and breaking method. The method comprises the following steps: before manufacturing the sandwich structure, firstly, sticking an adhesive film on the surface of the honeycomb-like porous structure, breaking pores of the adhesive film by a hot film blowing and breaking method and sticking on the side wall of a honeycomb core hole cell, and then carrying out heating and curing treatment so that the adhesive film forms an adhesive stream and shaped on the wall of the core of the honeycomb-like porous structure. An organic integer is formed on the surface of the honeycomb core by the method, and the intensity and rigidity of the surface of the honeycomb core are reinforced. When the structure is pressed, the pressure can be transferred and dispersed timely, so that the possibility of buckling failure of a partial weak region is reduced, the surface stability of the structure is reinforced effectively, and the integral pressure resistant capability is improved.
Owner:AVIC BEIJING AERONAUTICAL MFG TECH RES INST +1

High-strength shrinkage-free cement-based grouting material and preparation method and application thereof

The invention provides a high-strength shrinkage-free cement-based grouting material and a preparation method and application thereof. The high-strength shrinkage-free cement-based grouting material is prepared from, by weight, 400-500 parts of cement, 480-550 parts of sand, 0-15 parts of silica sand powder, 10-15 parts of expanding agent, 15-50 parts of silica fume, 2.5-4 parts of water reducingagent, 0.3-0.4 part of plastic expanding agent and 0-0.1 part of defoaming agent. When the grouting material is applied, the grouting material is in a self-flowing state only by adding water and stirring, no bleeding is produced, initial fluidity is greater than or equal to 340 mm, the fluidity is greater than or equal to 325 mm after 30 minutes, a grouting hole is directly filled with the grouting material, and all voids can be filled without vibration. The high-strength shrinkage-free cement-based grouting material has super-good early strength performance, the compressive strength of 1 dayis greater than or equal to 60 MPa, the strength of 3 days is greater than or equal to 85 MPa, the strength of 28 days is greater than or equal to 132 MPa, and normal operation can be achieved in 1 day after construction. The grouting material has a micro-expansion effect, and direct and tight contact between devices and a foundation is ensured. In addition, the grouting material does not corrodesteel bars, is resistant to oil contaminations, can be used for anchorage of foundation bolts, secondary grouting of the devices and the foundation, building reinforcement and repair, prefabricated concrete member sleeve connection and other projects.
Owner:河南力行科创矿山技术开发有限公司

Preparation method of carboxylated cellulose nanoparticles

The invention relates to a preparation method of carboxylated cellulose nanoparticles. The preparation method comprises the following steps of soaking a cellulose raw material in a reaction liquid; carrying out hydrothermal reaction for 0.5-6 hours at the temperature of 80-120 DEG C; diluting a reaction product with water; carrying out suction filtration and washing repeatedly until washing liquor is neutral; and carrying out freeze drying to obtain the carboxylated cellulose nanoparticles, wherein the reaction liquid is mixed liquid of an oxidizing substance aqueous solution and a hydrochloric acid aqueous solution, and oxidizing substances are at least one of oxidizing acid and oxidizing salt. The method is simple and convenient in technology, easy to operate, low in cost and short in treatment time; the product is not required to be subjected to troublesome aftertreatment such as dialysis, and the prepared cellulose nanoparticles are high in purity, narrow in size distribution and easy to regulate and control; and the carboxylated cellulose nanoparticles are suitable for industrial large-scale production, and have wide application prospect in the fields of green nano composite materials, biological medicines, food, garments, cosmetics, coating, photoelectricity and the like.
Owner:DONGHUA UNIV

Method for preparing m-phenylenediamine by taking meta-position oil as raw material

The invention discloses a method for preparing m-phenylenediamine by taking nitrochlorobenzene meta-position oil as a raw material. The method comprises the following steps of (1) nitrification of thenitrochlorobenzene meta-position oil, wherein the nitrochlorobenzene meta-position oil is added into concentrated sulfuric acid, the temperature rises, fuming nitric acid is added dropwise, a reaction is carried out, standing is carried out for removing waste acid, and a mixture of 2,4-nitrochlorobenzene and 3,5-dinitrochlorobenzene is obtained; (2) a catalytic hydrogenation reaction, wherein themixture of the 2,4-nitrochlorobenzene and the 3,5-dinitrochlorobenzene is taken as a raw material, methyl alcohol is taken as a solvent, an alkaline substance is taken as an acid-binding agent, precious metal palladium carbon is taken as a catalyst, hydrogen is introduced, and the m-phenylenediamine is obtained. The novel method for treating the nitrochlorobenzene meta-position oil is found, which can turn waste into wealth; compared with other methods for treating the meta-position oil, the method is simple and direct, and meets the requirement of the atomic economic benefit; other unnecessary side reactions cannot be generated, and the process is simple and easy to operate; compared with a method for preparing the m-phenylenediamine through the reduction of m-dinitrobenzene, the methodis more environmentally friendly, and low in cost.
Owner:济宁市金泰利华化工科技有限公司

W and V alloying beta phase solidifying high Nb-TiAl alloy and preparation method thereof

The invention relates to a W and V alloying beta phase solidifying high Nb-TiAl alloy and a preparation method thereof, and belongs to the field of alloy technology. The alloy comprises the following elements by mole: 43%-45% of Al, 5%-15% of Nb, less than or equal to 0.4% of W, less than or equal to 0.5% of V, and the balance of Ti and inevitable impurities. The preparation method comprises the following steps: raw materials are subjected to briquetting forming according to constitutions, titanium sponges are placed on the edge of the inner side of a mould firstly, a high purity aluminium layer, an aluminium niobium intermediate alloy layer, an aluminium vanadium intermediated alloy layer, an aluminium tungsten niobium intermediate alloy layer and a titanium sponge layer are arranged from bottom to top respectively; pressing cakes are placed into a water-cooling copper crucible vacuum induction suspension smelting furnace capable of centrifugal pressure casting for vacuum smelting to obtain melts and the melts are enabled to be mixed uniformly; the melts are cast in a metal casting mould that is preheated in advance and centrifugally rotates for centrifugal rotating and casting and cooled with the furnace. According to the invention, a TiAl alloy that is homogeneous and fine in structure and has no obvious segregation is obtained.
Owner:BEIJING UNIV OF TECH

Milling cutter assembly for precision machining

The invention relates to the technical field of machine tool machining, and particularly discloses a milling cutter assembly for precision machining. The milling cutter assembly comprises an output shaft, the bottom of the output shaft is fixedly connected with a circular plate, circular cavities are formed in the circular plate at equal intervals in a surrounding mode, openings communicated with the circular cavities are formed in the outer side of the circular plate, a rotating rod is vertically and rotationally installed in the middle of the circular cavities, sliding grooves are formed in the outer side of the rotating rod at equal intervals in a surrounding mode, and sliding blocks are slidably installed in the sliding grooves. Milling cutters with different hardness can be rapidly switched, the requirement for machining workpieces with different hardness can be met, the whole process is simple and easy to operate, time and labor are saved, a mounting frame for mounting the milling cutters can be pushed while the milling cutters are switched, the milling cutters can be pushed out of an opening, and the machining efficiency is improved. And under the condition that the first spring fails due to long-term use and cannot be normally used, normal push-out of the mounting frame can still be ensured, then normal switching is ensured, and the device is worthy of popularization and use.
Owner:常州博胜天泓工具有限公司
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