48results about How to "Uniform and firm load" patented technology

The invention discloses a ternary denitration sulfur-resistant catalyst in-situ loaded compound filter material and a preparation method thereof. The preparation method includes: taking a polyphenylene sulfide filter material as a catalyst carrier, and adopting lauryl sodium sulfate for surface modification of a polyphenylene sulfide needled felt to activate the polyphenylene sulfide filter material; taking potassium permanganate, anhydrous ferric chloride and cerium trichloride heptahydrate as catalyst precursors and taking deionized water as a solvent to realize one-step in-situ loading of a MnO2-Fe2O3-CeOx catalyst on the surface of the activated polyphenylene sulfide filter material. The compound filter material is firm in combination of the catalyst and polyphenylene sulfide fibers, excellent in low-temperature activity and denitration effect on nitric oxides in smoke and great in sulfur resistance, and defects of high cost, complexity and the like of a tail purification system in the prior art can be overcome. The ternary denitration sulfur-resistant catalyst in-situ loaded compound filter material and the preparation method thereof have advantages of technical simplicity in preparation, environment friendliness, low production cost and promising application prospect.

The invention relates to the removal of arsenic in drinking water, in particular to a drinking-water arsenic-removing device which comprises a closed hollow cylinder; the upper part of the cylinder is provided with a water outlet, and the lower part of the cylinder is provided with a water inlet; two cylindrical filter elements are vertically arranged inside the cylinder in parallel; the bottom of the filter element on the right is communicated with the water inlet of the cylinder, and the top thereof is provided with a water outlet; the middle and upper part, the middle part and the middle and lower part of the filter element on the right are respectively provided with a detachable hole-born supporting board along radial direction; the three supporting boards divide the cavity in the filter element on the right into four parts which are a filter bed A, a filter bed B, a filter C and a filter D from top to bottom; the bottom of the filter element on the left is provided with a water inlet, and the top of the filter element on the left is communicated with the water outlet of the cylinder; and loaded drinking-water arsenic-removing nano-adsorbing agent is filled in the filter element on the left. The arsenic-removing device has wide application range and can reduce arsenic content in the drinking water to safe standard, thus being suitable for the drinking requirement of scattered towns and citizens.

The invention relates to water purification materials and their preparation, in particular to photocatalytic nets for water purification and their preparation and application. The photocatalytic net for water purification is composed of a net plate made of metal aluminum or aluminum alloy, an oxide film layer evenly distributed on the surface of the net plate, and a photocatalyst coating attached to the outer surface of the oxide film layer. The preparation includes pretreatment of the screen, oxidation treatment, surface cleaning of the base material, carrying out photocatalyst loading on the base material by vacuum evaporation, annealing treatment and the like. The invention solves the technical problems of poor stability of the photocatalytic layer and high production cost in the prior art. It has the advantages of good photocatalytic performance and mechanical strength, firm coating adhesion, and low production cost.

A loaded TiO 2 The preparation method of the composite photocatalyst comprises the following steps: adding triethylamine to the mixed solution of soluble zinc salt, terephthalic acid and the first organic solvent, making terephthalic acid deprotonation and zinc ion self-assembly MOF‑5, filtered, washed and dried to obtain MOF‑5 powder; the hydrolyzable titanium source is hydrolyzed with water in a second organic solvent to obtain a first solution containing nano-titanium dioxide; the first solution is concentrated, Increase the concentration of the nano-titanium dioxide sol to obtain a second solution; and add the MOF-5 powder to the second solution, fully mix by ultrasonic vibration, filter, wash and dry to obtain TiO 2 / MOF‑5 composite photocatalyst.

A loaded TiO 2 The preparation method of the composite photocatalyst comprises the following steps: placing the mixed solution of soluble zinc salt, 2-methylimidazole and the first organic solvent in an autoclave and heating the reaction to deprotonate 2-methylimidazole and Zinc ions are self-assembled into ZIF-8, filtered, washed and dried to obtain ZIF-8 powder; the hydrolyzable titanium source is hydrolyzed with water in a second organic solvent to obtain the first solution containing nano-titanium dioxide; Describe the first solution, increase the concentration of the nano-titanium dioxide sol to obtain a second solution; and add the ZIF-8 powder to the second solution, fully mix by ultrasonic vibration, filter, wash and dry to obtain TiO 2 / ZIF‑8 composite photocatalyst.

The invention discloses a UV assistant electrostatic atomization moulding system and a manufacture method for a titanium dioxide coating. The method is characterized by integrating micro-arc oxidation technology and electrostatic atomization technology, and specifically comprises the steps of electrolyte preparation, micro-arc oxidation, drying, thermal treatment, electrostatic atomization and photoreduction, so that the porous titanium dioxide coating doped with silver nanoparticles is manufactured. According to research, the titanium dioxide coating doped with the silver nanoparticles has good bacterium resistance and biological activity. The manufacture method is simple, high in operability and low in raw material cost; and the whole manufacture process is performed in an air atmosphere, and no special devices are needed.

The invention relates to the technical field of waste-gas treatment and particularly relates to a device for photolytic oxidation treatment of VOC (Volatile Organic Compound) pollutants. The device comprises a reaction box body 1, a gas inlet 2, a catalyst layer 3, a catalytic light source 4 and a gas outlet 6, wherein the gas inlet 2 is positioned at the left and lower part of the reaction box body 1; the gas outlet 6 is arranged at the right and upper part of the reaction box body 1 and is higher than the catalytic layer 3; one or more catalyst layers 3 parallel to the bottom surface of thereaction box body 1 is / are arranged above the gas inlet 2; each catalyst layer 3 corresponds to a group of catalytic light sources 4 which are arranged above the corresponding catalyst layer 3. The device has the beneficial effects that by adoption of the photocatalyst prepared by a specific preparation method, a higher VOC treatment effect can be realized only by a simple device, and simultaneously certain treatment capability for heavy metal ions is achieved and the maintenance cost is low.

The invention relates to the technical field of electrochemical materials, in particular to a nanofiber-based flexible array structure electrode and a preparation method thereof. The nanofiber-based flexible array structure electrode is prepared from an inner layer spinning solution and an outer layer spinning solution through electrostatic spinning, carbonization, hydrothermal growth and electro-deposition, the inner layer spinning solution is prepared from polyacrylonitrile (PAN), purified terephthalic acid (PTA), acidized carbon nanotubes (AC-MWNTs) and a solvent, and the outer layer spinning solution is prepared from polyvinylpyrrolidone (PVP), inorganic zinc salt, PTA and a solvent. According to the preparation method of the nanofiber-based flexible array structure electrode, the flexibility of carbon fiber is improved, and ZnO can be directly added into a precursor in the coaxial spinning process, so that the outer surface of the carbon nanofiber is loaded with nano ZnO evenly and firmly, the seed crystal coating process is omitted, thus the method is simple, efficient, high in universality, low in cost and environmentally friendly, an obtained product integrates the flexiblecharacteristic and bimetallic pseudocapacitance performance, and can form an independent electrode.

The invention relates to a preparation method and application of a green titanium-based polyester catalyst, which is characterized in that it comprises the following steps: dissolving ethyl orthosilicate in absolute ethanol, adding an appropriate amount of acidified attapulgite, stirring evenly, and continuing to drip Add a mixed solution of titanium tetraisopropoxide and absolute ethanol, add dropwise a mixed solution of deionized water and absolute ethanol, heat in a water bath, hydrolyze for several hours, stop heating and stirring, wash with absolute ethanol, dry and grind to obtain It is a new type of green titanium-based catalyst. The advantage of the present invention is that the titanium oxide / silicon oxide / attapulgite composite titanium-based catalyst is prepared by the mixed hydrolysis method, and silicon oxide is used to suppress the crystallization of titanium oxide, and at the same time, the attapulgite is used as a carrier to improve the dispersion of titanium oxide and silicon oxide properties, making the activity of the catalyst more stable, thereby reducing the side reactions of the polyester and improving the hue of the polyester produced.

The invention discloses a composite catalytic filter material for low-temperature degradation of dioxins and a preparation method thereof, belonging to the technical field of waste incineration tail gas treatment. The high-temperature-resistant filter material is used as a catalyst carrier, activated by the filter material, precipitated in situ, and impregnated with V active group and low-temperature plasma oxidation steps to prepare loaded VO x -MnCeO x Composite catalytic filter material for three-way catalyst. The advantages of the present invention are: (1) excellent low-temperature activity and selectivity for catalytic degradation of dioxins; (2) active component V with high activity and excellent chlorine poisoning resistance is added to the filter material, through Effectively oxidize V active components, improve catalytic activity and chlorine poisoning resistance; (3) achieve even and firm loading of the catalyst on the surface of the filter material by in-situ precipitation method, mild preparation conditions, maintain the original performance and stability of the filter material, long lasting.

The invention provides a preparation technology for coating a filter material with an efficient denitration catalyst with a ring opening polymerization method. Firstly, a PPS (polyphenylene sulfide) filter material is pretreated with strong acid, so that more active oxygen-containing functional groups such as hydroxyl, carboxyl and the like are obtained on the surface. The PPS filter material can be used as a modified monomer due to existence of these oxygen-containing functional groups, then, acrylamide is uniformly dispersed on the PPS surface under the ultrasonic action, potassium permanganate is used as an initiator, a ring opening polymerization reaction is conducted on the PPS surface, meanwhile, a produced manganese catalyst firmly coats the PPS surface, and the compound filter material with the efficient denitration function is prepared.