1156results about How to "Strong anti-pollution" patented technology

The invention discloses whole-oil synthetic base drilling fluid which mainly comprises following components: base liquid 100 parts, histosol 2-5 parts, viscosity increaser 0.5-3 parts, filtrate reducer 2-5 parts, wetting agent 0.5-2 parts, emulsifier 1-3 parts, calcium oxide 0.5 part and weighting agent 27-180 parts. The invention has the advantages that firstly, the rheological property is good and the plastic viscosity is low, secondly, the anti-temperature performance is good and anti-temperature can reach 150 DEG C, thirdly, the invention is provided with good water loss wall building performance with API filter loss content<5ml and high temperature and high pressure filter loss content <= 10 ml, fourthly, the anti-pollution ability is strong and the anti-poor soil ability and the anti-water invasion ability respectively reach 20%, and fifthly, reservoir has good protective effects and the permeability recovery value is over 85%.

The invention belongs to the technical field of membrane preparation and water purification and discloses a high-performance two-dimensional layered Ti3C2-MXene membrane, a preparation method thereof and an application of the Ti3C2-MXene membrane in water treatment. The method comprises steps as follows: (1), Ti3AlC2 powder and an HF solution are mixed, stirred for a reaction, centrifugally washed and dried, and Ti3C2 powder is obtained; (2), the Ti3C2 powder and a solvent are mixed, stirred for the reaction, washed and dried, and treated powder is obtained; (3), the treated powder is dissolved in the solvent and subjected to ultrasonic treatment and centrifugation, a liquid supernatant is taken and dried, and a two-dimensional nanosheet is obtained; (4), a solution is prepared from the two-dimensional nanosheet and deposited on a porous substrate with a nano self-assembly technology, and the high-performance two-dimensional layered Ti3C2-MXene membrane is obtained. The membrane has ultrahigh water flux, higher selectivity and good mechanical property and stability; the method is simple, low in energy consumption and cost, good in repeatability and wide in applicability.

The invention discloses hydrophilic polyethylene hollow fiber microporous membrane and preparation process thereof. Said membrane is characterized in that it mainly comprises polyethylene, amphoteric copolymer containing polyethylene oxide, and inorganic nano particles. The membrane preparing process is carried out based on thermally induced phpase separation and surface segregation principles, comprising the steps of (1) preparing membrane blank by fusion and blending of amphoteric copolymer containing polyethylene oxide, diluent, and inorganic nano particles; (2) preparing hollow fiber membrane precursor by hollow process spinning of membrane blank in molten state; (3) extracting diluent in hollow fiber membrane precursor by using organic solvent to obtain said hydrophilic polyethylene hollow fiber microporous membrane, wherein the porosity of said membrane is between 40% and 80%, and average pore diameter is between 0.1mum and 5.0mum. The microporous membrane in the invention has the characteristics of high hydrophilicity, narrow pore size distribution, high strength, and good chemical stability, and serves as micro-filtration and ultra-filtration membrane material with high performance, low cost, pollution resistance, and long serve life for water treatment.

The invention discloses a preparation method of a high-throughput anti-pollution composite nanofiltration membrane. The preparation method comprises the following steps: inorganic nanoparticles are uniformly dispersed in a porous polymer supporting layer, a surface active agent is added in solution A, a polyamide layer is prepared on the porous polymer supporting layer through interfacial polymerization, hot water soaking treatment and glycerol moisturization treatment are adopted, and then drying is performed, and thus, the high-throughput anti-pollution composite nanofiltration membrane is prepared. According to the method, the porous supporting layer microstructure is changed by inorganic nano particles, the surface active agent is added in the solution A, and the flux and the antifouling property of the composite nanofiltration membrane are improved. The preparation method is easy, the raw material is cheap, the preparation process is simple and the method has good industrial applicability.

The invention discloses a mine-hoist constant deceleration safety braking system and a braking method thereof, and relates to the technical field of mine-hoist safety braking control. The system comprises a disk brake, a hydraulic station, an electric control device and a detection feedback device which are arranged on a drum brake disk, wherein a speed sensor arranged on the drum acquires a hoist deceleration signal and inputs the hoist deceleration signal into the electric control device; the electric control device receives the signal and compares the signal with the given speed value to send out a control command; after the control command is processed into an electric signal and compared with an oil pressure signal which is fed back by a pressure sensor on the hydraulic pipeline arranged between the outlet end of an electrohydraulic proportion reversing valve and the disk brake cylinder, an electric signal control command is sent out; and the electrohydraulic proportion reversingvalve of the hydraulic station outputs a hydraulic pressure signal, which varies as the input control command varies, so as to control the motion state of the hoist by the disk brake, thereby realizing constant deceleration safety braking of the mine hoist.

A preparation method of a high-performance PVDF composite ultrafiltration membrane with the surface loaded with a TiO2 thin membrane is provided. The invention is used for solving the problems of complex process, high membrane preparing cost, and difficult industrialized production existing in a conventional method for improving membrane hydrophilicity so as to improve membrane flux, anti-fouling performance and the like. The preparation method comprises the steps: 1, preparing a PVDF polymer membrane casting solution, and preparing an ultrafiltration basement membrane by an immersion-precipitation method; 2, preparing an auxiliary agent solution; 3, soaking the basement membrane in the auxiliary agent solution, taking out and swashing with water, and soaking in deionized water; 4, preparing a titania precursor solution; 5, immersing the basement membrane in the titania precursor solution, hydrolyzing a precursor, taking out and swashing with water, and thereby obtaining the high-performance ultrafiltration membrane with the surface firmly loaded with the TiO2 thin membrane. The method of the invention has the advantages of simple operation and low cost; and the obtained ultrafiltration membrane has large permeation flux, high rejection rate, strong hydrophilicity and outstanding anti-fouling performance. The preparation method is used for the membrane processing field.

The invention discloses a deepwater constant-rheology oil base drilling fluid applicable for deep sea drilling. The deepwater constant-rheology oil base drilling fluid applicable for deep sea drilling comprises the following components in parts by weight: 70-100 parts of white oil, 0-30 parts of a calcium chloride aqueous solution, 1.5-5 parts of a fluid type conditioning agent, 1-4 parts of an emulsifying agent, 0.5-2.5 parts of a wetting agent, 1-3.5 parts of organic soil used for drilling fluid, 1.5-5 parts of a filtrate reducer, 0.2-0.6 parts of calcium oxide and 0-260 parts of a weighting agent. The fluid type conditioning agent is at least one of ethylene-propylene copolymer, polymethacrylate, trimeric acid, phenolic resin, copolymer generated from reaction of dimer acid, cholamine and polyethylene polyamine and copolymer generated from reaction of acrylamide, styrene and methacrylic acid. The movable shearing force and six-speed viscometer of the oil base drilling fluid is respectively less than 6 r/min and 3 r/min, and the 10-min static shearing force can be kept steady within 4-65 DEG C; constant eheology is realized in the temperature range of the barrel of the deepwater drilling, technical demands on sea deepwater drilling can be satisfied, requirements on base oil raw material are loose, and the cost is low.

The invention relates to a nano interior wall coating; the composition by the weight percent is as follows: 35 percent to 45 percent of film-forming material, 28 percent to 42 percent of pigment and filler, 4 percent to 7 percent of assistant, 0.6 percent to 1.2 percent of nano powdery material, 1.0 percent to 2.0 percent of water-soluble nano silica sol, and 10 percent to 30 percent of deionized water. The film-forming material can be styrene-acrylic latex or acrylic latex; the pigment and filler is one or more than one type among rutile titanium dioxide powder, calcined kaolin, heavy calcium carbonate and super-fine aluminum silicate; the assistant comprises one or more than one type among dispersant, wetting agent, foam killer, preservative, thickener, anti-freezing agent, ph regulator and film-forming assistant. The coating of the invention can continuously release negative ions under the radiation of a fluorescent lamp, and can effectively degrade the dissociative TVOC and formaldehyde content in the air; the washing resistant times reaches 20000 to 50000 times, and the manual aging resistance reaches more than 1000 hours. In addition, the coating saves the consumption of nano powdery material and reduces the production cost.

The invention relates to a real-time on-line monitoring apparatus of blade vibration of a flue gas turbine. The monitoring apparatus comprises blade tip timing sensors, an angle reference sensor, a rotating speed synchronization sensor, a preprocessing system, a data integrated processing card, and a computer. The blade tip timing sensors, the angle reference sensor, and the rotating speed synchronization sensor are connected with the preprocessing system that is connected with the data integrated processing card; and the data integrated processing card is connected with the computer. According to the invention, the sensors employ double-shielded capacitance impulsers; single-core double-shielded wires are utilized as transmission lines of output signals; and a driving cable technology is utilized to effectively reduce a random error introduced by an environmental interference; and a charge amplification circuit is used to extract a capacitance pulse signal, thereby eliminating the system error basically and improving the measurement accuracy of the system.

The invention discloses an energy-efficient hydraulic power supply driven by a permanent magnet servo motor, which comprises the permanent magnet servo motor, a servo controller, a hydraulic oil pump (comprising a gear oil pump, a vane pump, and a plunger pump), a sensor and the like. An oil pump is driven by the high-efficiency permanent magnet servo motor which has good mechanical characteristic, large overload magnification, and high speed regulation performance; a system for redundancy monitoring of system flow and pressure by pressure-flow double closed loop control and the voltage and current of the motor is adopted; and an oil temperature compensation function is realized. According to different hydraulic pressure load working conditions, three working modes of pressure self-adaption, flow self-adaption, and power self-adaption are provided, and each working mode is optimized by adopting different control strategies. Therefore, the energy-efficient hydraulic power supply has the advantages of wide application range, high system efficiency, high low-speed stability, quick response, accurate speed regulation and the like.

The invention relates to a novel method for amphiphilic copolymer modified PVDF (Polyvinylidene Fluoride) hollow fiber ultra-filtration membranes, and belongs to the technical field of preparation of PVDF membranes. The method comprises the following steps: (1) PVDF, amphiphilic copolymer, pore-foaming agent, nonsolvent and solvent are fully mixed, and are dissolved to obtain membrane casting liquid; (2) the membrane casting liquid is fed in a hollow fiber membrane spinning machine for extruding, is condensed and formed in a coagulating bath, and is wound and collected to obtain the PVDF hollow fiber membranes; (3) the PVDF hollow fiber membranes are dipped in hot water; and (4) finished products are obtained after cleaning and drying. The amphiphilic copolymer modified PVDF hollow fiber ultra-filtration membranes, prepared by the method, have the characteristics of permanent hydrophilcity, excellent pollution resistance, high throughput and high reject rate.

The present invention relates to anti-pollution high efficiency isolating liquid for shaft wall cementing operation and its preparation process. The isolating liquid is compounded through adding suspension stabilizer, water reducing agent, tackifier, diluent, viscosity and shearing force increasing agent, weight additive and pH regulator in certain weight proportion into water. One compounding process is a water base process through throwing the said components successively into water in a slurry tank apparatus. One other compounding process is one dry mixture process in a cementing tank apparatus. The isolating liquid has flexible compounding process, high anti-pollution capacity and effective eliminating effect on well wall interface pollutant.

The invention discloses a low-pressure high-flux chlorine-containing polymer nanofiltration membrane with a stable separation layer and a preparation method thereof. The nanofiltration membrane comprises a macroporous support layer and a dense function layer, wherein the macroporous support layer and the dense function layer are connected with each other by virtue of a C-N bond; the dense function layer is made of a positive, charged or amphoteric ionic cross-linking polyamine compound; the macroporous support layer is made of a chlorine-containing polymer. The preparation method of the filtration membrane comprises the following steps: firstly coating the surface of a chlorine-containing polymer ultrafiltration membrane with the polyamine compound, carrying out heat treatment, washing the ultrafiltration membrane, then dipping the ultrafiltration membrane in a mixed solution of a cross-linking agent and a charge reagent and carrying out heat treatment again. The membrane flux of the prepared polymer nanofiltration membrane can reach 60L/m<2>.h under the pressure of 0.3MPa; the retention rate on micromolecule dye and high-valence inorganic salt can reach 90%; the chlorine-containing polymer nanofiltration membrane can be in a flat fiber ultrafiltration membrane form or a hollow fiber ultrafiltration membrane form, and has good practical prospect.

The invention relates to a gas oil base invert oil-emulsion drilling fluid and a preparation method, wherein the total volume of gas oil and calcium chloride aqueous solution is 100 parts: the volume ratio of oil phase to water phase is between 95:5 and 70:30, and the concentration of calcium chloride aqueous solution is 5%-saturation; the required gas oil, primary emulsion, auxiliary emulsion and wetting agent are added into a high speed mixing beaker, and are mixed at high speed for 2-5 minutes; the calcium chloride aqueous solution is added and mixed at high speed for 15 minutes; organic soil, calcium oxide and a fluid loss agent are added and mixed at high speed for 10 minutes; and the required amount of barite is added according to density, and is mixed at high speed for 25 minutes. The gas oil base invert oil-emulsion drilling fluid is used for overcoming the defects of the existing gas oil base drilling fluid and solving the problems of the salt resistance and temperature resistance of the gas oil base drilling fluid, and can resist the temperature above 200 DEG C.

The invention discloses a polyamide film composite membrane and a preparation method and application thereof. The composite membrane comprises a polymer support layer and a polyamide active layer. The polyamide active layer is obtained by a reaction of a multielement acyl chloride solution and a polyamine aqueous solution containing a tertiary amine additive. In the preparation process, the polyamine aqueous solution containing the tertiary amine additive and the multielement acyl chloride solution undergo an interfacial polymerization reaction to produce the modified polyamide active layer so that the film-forming process is greatly simplified. The composite membrane has a high crosslinking degree and high compactness, and has a high water flux in membrane separation, a low reverse salt flux and good anti-fouling properties.

The invention relates to a polyvinylidene fluoride membrane and a preparation method thereof, and specially, relates to a polyvinylidene fluoride organic-inorganic hybrid membrane and a preparation method thereof. A casting solution of the polyvinylidene fluoride organic-inorganic hybrid membrane comprises 14 to 25% of polyvinylidene fluoride, 3 to 12% of one or more mixed polymers, 0.2 to 5% of one or more inorganic nanometer additives, 4 to 12% of one or more hydrophilic pore-forming agents, 0.05 to 3% of a surfactant and 50 to 80% of one or two solvents. The casting solution is prepared and then is processed into a polyvinylidene fluoride organic-inorganic hybrid membrane finished product through a dry-wet spinning technology. Compared with the prior art, the preparation method adopts hydrophilic mixtures and hydrophilic inorganic nanometer particles simultaneously and thus further improving membrane wire hydrophily, membrane flux and membrane contamination resistance.

The invention discloses an antifouling and antibacterial coating paint, which is prepared by taking methanol as a solvent through carrying out quaterisation reaction on copolymers methoxy polyethylene glycol-b-poly(ethyl methacrylate) dimethyl sulfo-propane betaine-b-poly dimethylaminoethyl methacrylate and 3-triethoxysilane. The invention also discloses applications of the paint in preparing coatings on the surfaces of ships, marine engineering machineries and sewage treatment equipment so as to implement antifouling and antibacterial treatment. Experiments show that a polymer coating prepared by using the paint disclosed by the invention has excellent protein adsorption and microbial contamination resistance, and has lasting antifouling and antibacterial abilities, and therefore, the paint has a board market prospect, and has significant social and economic values.

The invention relates to a method to prepare a new hydrophilic coating for outside wall containing nmself-crosslinking acrylic ester latices and nm inorganic powder. Its dispensation is:nm indoor crosslinking acrylic ester latex(5-40%), indoor crosslinking acrylic ester latex(20-50%),inorganic nm powder(0.1-20%),inorganic filler(10-50%),film-forming assistant(0.05-5.0%) and the other is water without ion. Its preparing method is:firstly use high speed dispersion and sand grinding method to prepare nm disperseion and filler color which are then mixed with nm self-crosslinking acrylic ester latex and general acrylic ester latex, add into assistant and stir them by media-low speed for 0.5-1.5h,filter and package. The coating has good stability and film-forming performance,strong adhesive force and resistance to pollution, outstanding thermo insulating property, as well as self-cleaning performance.