46results about How to "Good exfoliation" patented technology

The invention discloses a polar electricity dust removing device with bagged dust collection, which comprises a dust remover shell, a smoke gas inlet, a uniform air board, a smoke gas outlet, dust buckets, filtering bags, electrode wires and a high-voltage insulating compartment, wherein, a plurality of rows of cloth bags are evenly arranged at interval inside the shell, and the high-voltage electrode wires are arranged at the circle center of a concentric circle of every four cloth bags and connected with a power source through the high-voltage insulating compartment arranged at the top of a dust remover; the uniform air board is arranged under a plurality of rows of filtering bags at the lateral wall of the dust remover shell close to the smoke gas inlet, multiple levels of dust buckets are arranged under the multiple rows of filtering bags, and the smoke gas outlet is arranged above the multiple rows of filtering bags at the lateral wall of the dust remover shell. The polar electricity dust removing device with bagged dust collection has the advantages of simple and unique structure, superior technical performance, smaller resistance, effective overcoming of the reverse corona phenomenon and good dust removing effect, etc. The polar electricity dust removing device with bagged dust collection improves the integral dust removing efficiency under the agglomeration action of electrostatic fields and the interception action of the cloth bags, effectively protects the filtering bags from being burned out by discharge sparks by adopting protective cage structure, and reduces device cost by substituting the steel polar plates with the filtering bags.

An electrostatically-enhanced electric-bag compound dust remover comprises a high-voltage power supply arranged outside a casing and a compound dust removing area arranged in the casing; the compound dust removing area comprises a forestage electrostatic dust removing area and a rear-stage bag type dust removing area, wherein the forestage electrostatic dust removing area comprises a high-voltage discharge polar line and a dust collecting pole plate; filtering bags uniformly distributed are arranged in the bag type dust removing area; conductive cage bones are arranged in the filtering bags; vertical reinforcement bars in the conductive cage bones are connected with the ground and the negative pole of a high-voltage direct-current power supply, and each two adjacent vertical reinforcement bars are opposite in polarity; a plurality of insulating rings are arranged in the vertical direction; the vertical reinforcement bars are fixed on the insulating rings. The electrostatically-enhanced electric-bag compound dust remover has the characteristics that a non-uniform electric field is added in the bag type dust removing area, so that charged dust particles are distributed non-uniformly on the surfaces of the filtering bags; meanwhile, the particles are polarized into chains through the electric field, and then the probability of collecting the particles can be increased, so that the air-to-cloth ratio can be improved, the filtration resistance can be lowered at the same time, the soot cleaning frequency can be reduced, and the dust remover has the advantages of low energy consumption and long service life.

Nanocomposite materials having electromagnetic-radiation barrier properties comprising layered nanoadditives with or without organic and / or inorganic surface modification; and a polymeric matrix, process for obtainment thereof and use of said nanocomposite materials in applications of packaging, greenhouse films, coatings, etc.

The invention provides a boron-containing die steel and a heat treatment method thereof. The boron-containing die steel comprises the following chemical compositions in percentage by mass: 0.35 to 0.45 percent of C, 1.2 to 1.6 percent of B, 0.6 to 0.8 percent of Al, 1.8 to 2.5 percent of Cr, 0.4 to 0.6 percent of Mo, 0.3 to 0.5 percent of Ni, 0.05 to 0.30 percent of Ti, 0.02 to 0.15 percent of Ta, 0.05 to 0.20 percent of Nb, 0.5 to 1.0 percent of Mn, 0.3 to 0.5 percent of Si, 0.03 to 0.06 percent of Y, 0.008 to 0.020 percent of Ca and the balance of Fe, wherein Ti+Ta+Nb is greater than 0.30 and less than 0.55; S is less than 0.03; and P is less than 0.03. The heat treatment method of the boron-containing die steel of the invention comprises the following steps: heating the die steel in a heating furnace to the temperature of between 880 DEG C and 920 DEG C and then carrying out heat preservation for 4 to 8 hours; then continuously heating the die steel at the temperature of between 1,050 DEG C and 1,080 DEG C, carrying out heat preservation for 2 to 4 hours, carrying out furnace cooling to the temperature of between 950 DEG C and 980 DEG C and carrying out heat preservation for 1 to 3 hours; next, cooling the die steel in quenching oil; and finally, heating the processed die steel in the heating furnace to the temperature of between 220 DEG C and 250 DEG C, carrying out heat preservation for 8 to 15 hours, carrying out furnace cooling to the temperature of 150 DEG C, discharging the processed die steel and carrying out air cooling on the processed die steel. The die steel of the invention has the advantages of low cost and better toughness. The heat treatment method has simple process.

The present invention is metal type paint for centrifugal casting high-alloy furnace tube and its production process. The material includes zirconite powder, silica sol, fluotrite powder, cellulose, PVA and bentonite; and the mixing production process includes dry mixing zirconite powder, fluotrite powder and bentonite inside a crushing roller mill for 15 min, dissolving cellulose and PVA in water and mixing and milling for 3 hr, and adding silica sol and mixing and milling for 30 min. The paint can form coating with increased low temperature strength, increased low temperature plasticity, raised flush resistance and vibration resistance.

The invention discloses high-temperature-resistant environment-friendly metal casting coating and a preparation method thereof. The coating comprises, by weight, 3-5 parts of attapulgite clay, 12-15 parts of quartz powder, 5-12 parts of talcum powder, 4-10 parts of superfine glass powder, 1.5-4 parts of sodium silicate, 3-5 parts of bauxite, 3-8 parts of diatomaceous earth, 2-4 parts of bentonite, 6-10 parts of polyethylene glycol, 3-9 parts of organic siloxane, 5-9 parts of silicon resin, 6-12 parts of linseed oil water-soluble alkyd resin, 4-6 parts of triphenyltin hydroxide, 2-6 parts of lignosulfonic acid, 1-3 parts of oxidizing agents, 1-2 parts of wetting agents, 2-5 parts of defoaming agents, 4-9 parts of preservatives, 2-6 parts of bonding agents, 5-8 parts of curing agents and 75-90 parts of deionized water. Compared with the prior art, the casting coating prepared through the method has excellent high temperature resistance, crack resistance and scouring resistance, and is good in adhesiveness and air permeability; meanwhile, the produced coating is uniform, environmentally friendly, free of pollution, good in stability and adsorbability, and capable of meeting the requirements for mass production of large castings, and improves the surface quality of the castings.

The invention relates to the technical field of aero-engines, in particular to a ceramic-based composite turbine outer ring high-temperature sealing coating and a preparation process thereof. The ceramic-based composite turbine outer ring high-temperature sealing coating comprises a bonding layer, a transition layer and a wearing layer coating from inside to outside in sequence. The bonding layercomprises SiC. The transition layer comprises Yb2SiO5. The wearing layer coating comprises ZrO2.Y2O3Polyester. The coating provided by the invention is a composite coating capable of being matched with a SiC / SiC ceramic-based composite and has the advantages of 1200-DEG C wear consumption sealing and heat insulation. The problems that mechanical damage caused by mutual friction between SiC / SiC ceramic-based composite turbine components, and high-temperature oxidation, structure degradation and other damages to a ceramic-based composite can be solved. The plasma technology has the advantages ofhigh-energy density, high production efficiency, low cost, little equipment investment and the like and belongs to the optimal process for preparing high-temperature-resistant ceramic coating materials.

The invention discloses a dust-electrical-charge bag dust collector. Single chambers of the dust collector are of rectangular, three-dimensional and inverted-conical structures, gas purifying chambers are located on dust gas chambers, filtering bags are located between the gas purifying chambers and the dust gas chambers, and gas injection pipes for recycling blowback dust removing of the filtering bags; bag and bag cage assemblies for filtering gas are arranged in the dust gas chambers, dust-falling partition plates are installed on the side walls of the lower portions of the dust gas chambers and located at the upper portions of insulating-plate pulse dust cleaning pipes, the insulating-plate pulse dust cleaning pipes are connected with insulating-plate heaters, and insulating plates are fixed at the portions, on the sides of gas inlets and gas outlets, inside bodies; the gas inlets and the gas outlets are formed in one sides of the dust gas chambers, and corona heat preservation boxes are arranged on the other sides of the dust gas chambers, wherein the dust gas chambers and the corona heat preservation boxes are integrated; corona areas are arranged at the lower ends in the dust gas chambers, and ash buckets are arranged below the corona areas. Dust-gas separating is carried out through the negative pressure effect of fluid and the filtering function of the filtering bags, and purified gas is attached to the outer surfaces of the filtering bags through electrical-charge dust; dust layers formed by the filtering bags have small airflow resistance, and dust is easy to clean.

The invention relates to a polyurethane modified asphalt waterproof paint, which is composed of the following raw materials by weight: 25-30 parts of a polyurethane prepolymer; 70-75 parts of 90# petroleum asphalt; 40-60 parts of water; 20-25 parts of polychloroprene latex; 4-7 parts of an emulsifier; 2-4 parts of polyvinyl alcohol; 1-3 parts of a coupling agent; 1-2 parts of polypropylene glycol;3-5 parts of trihexyl o-acetylcitrate; 0.1-0.5 part of pentaerythritol ester of hydogenated rosin; 1-3 parts of polyacrylamide; and 10-15 parts of modified nano calcium carbonate. The polyurethane modified asphalt waterproof paint prepared by the method provided by the invention has good film compactness and high stability, a waterproof layer formed by the waterproof paint in a building has largebonding strength with a building base surface and good waterproof effect, moreover, after modification, the product has substantially improved water tolerance, aging resistance, acid and alkaline resistance and the like, has a simple making process, and overcomes the disadvantages of tedious making, poor film compactness, poor waterproofness and aging resistance in previous water emulsified asphalt paint.

The invention discloses a method for preparing a cation ester-based type soap-free emulsion polymer. According to the method, a cation type and an ester-based monomer are adopted as raw materials, a soap-free emulsion polymerization method is implemented, meanwhile, a pH value adjusting agent is adopted to control the pH value of a reaction environment within 8-8.5, a soap-free cation hydrophilicmonomer, a soap-free ester-based hydrophobic monomer and an initiator a are enabled to react to synthesize a soap-free polymer, and the soap-free polymer is further reacted with other raw materials tosynthesize a polymer emulsion. The preparation method has the advantages of being rapid in polymerization speed, small in reaction step, small in environment pollution and mild in reaction condition,the synthesized product is good in permeation resistance, good in peeling effect and excellent in waterproof effect and weather resistance, no expensive emulsifier is added in the synthesis process,and thus the production cost is also greatly reduced.

The invention discloses a method for preparing an Nb / NbCr2-based high-temperature alloy surface anti-oxidation composite coating, which is characterized by comprising the following steps of: (1) preparing a Si-Al coating; (2) preparing Al(OH)3 sol by the sol-gel method; and (3) performing hot pressing. The method has the advantages that: (1) the coating is closely combined with a base and is compact so as to form a composite structure with an outer Al2O3 layer and an inner Si, Al, Cr and Nb diffusion layer; (2) the oxide film strips off seriously at the beginning of the oxidation at the temperature of 1,200 DEG C so as to cause disastrous oxidation; (3) the composite coating has the optimum effect of preventing the oxide film from stripping, namely only 0.049mg of the oxide film per square millimeter strips off after the oxidation is carried out ten times for 100 hours at the temperature of 1,100 DEG C, and particularly, only 0.13mg of the oxide film per square millimeter strips off at the temperature of 1,200 DEG C and only a weight of 3.38mg / cm2 is increased; therefore, the high temperature oxidation resistance of the Cr-50Nb alloy is greatly improved.

A cleaning cream containing PVA particles has PVA particles being uniformly dispersed in a cleaning cream. Moisture content of the cleaning cream is at the range of 0.1˜23%. The cleaning cream comprises a least a surfactant. The PVA particles has glycerol and PVA in which molecular weight of the PVA is 110,000˜120,000. The PVA particles remain as particle form in the cleaning cream.

An electrophotographic photosensitive member includes a photoconductive layer, an intermediate layer, and a surface layer. When Si+C atom density in the surface layer is represented by DS×1022 atoms / cm3, the DS is 6.60 or more, and when the maximal value of H / (Si+H) in a distribution of hydrogen quantity in the photoconductive layer in a layer thickness direction is represented by HPmax, the average value of the H / (Si+H) in the second photoconductive region is represented by HP2, the DS and the HP2 satisfy the following expression (1) and the DS and the HPmax satisfy the following expression (2).HP2≧0.07×DS−0.38  Expression (1)HPmax≦0.04×DS+0.60  Expression (2)

The invention provides a boron-containing die steel and a heat treatment method thereof. The boron-containing die steel comprises the following chemical compositions in percentage by mass: 0.35 to 0.45 percent of C, 1.2 to 1.6 percent of B, 0.6 to 0.8 percent of Al, 1.8 to 2.5 percent of Cr, 0.4 to 0.6 percent of Mo, 0.3 to 0.5 percent of Ni, 0.05 to 0.30 percent of Ti, 0.02 to 0.15 percent of Ta, 0.05 to 0.20 percent of Nb, 0.5 to 1.0 percent of Mn, 0.3 to 0.5 percent of Si, 0.03 to 0.06 percent of Y, 0.008 to 0.020 percent of Ca and the balance of Fe, wherein Ti+Ta+Nb is greater than 0.30 and less than 0.55; S is less than 0.03; and P is less than 0.03. The heat treatment method of the boron-containing die steel of the invention comprises the following steps: heating the die steel in a heating furnace to the temperature of between 880 DEG C and 920 DEG C and then carrying out heat preservation for 4 to 8 hours; then continuously heating the die steel at the temperature of between 1,050 DEG C and 1,080 DEG C, carrying out heat preservation for 2 to 4 hours, carrying out furnace cooling to the temperature of between 950 DEG C and 980 DEG C and carrying out heat preservation for 1 to 3 hours; next, cooling the die steel in quenching oil; and finally, heating the processed die steel in the heating furnace to the temperature of between 220 DEG C and 250 DEG C, carrying out heat preservation for 8 to 15 hours, carrying out furnace cooling to the temperature of 150 DEG C, discharging the processed die steel and carrying out air cooling on the processed die steel. The die steel of the invention has the advantages of low cost and better toughness. The heat treatment method has simple process.

The present invention refers to new active nanocomposite materials, comprising a matrix and additives. The present invention also describes a process for obtaining these nanocomposite materials and their use in various industry sectors.