36results about How to "Excellent purification" patented technology

The invention discloses a novel efficient automatic indoor air purification device and belongs to the technical field of environment-friendly air purification. The indoor air purification device specifically comprises a shell, a circuit board, an air guiding device, an air dust collection device, a negative ion generation device, an ultraviolet sterilization device, a photocatalytic oxidation device, an operation panel and a wireless remote controller, wherein a draught fan serves as a power source of the air guiding device. A negative ion technology, an ultraviolet sterilization technology, a photocatalytic oxidation technology, a silver ion sterilization technology and a filtering adsorption technology are integrated. The shortages that according to an existing air purification device, the functions of sterilization, disinfection and removal of suspended particles, volatile harmful gases, peculiar smells, ozone and other harmful gases are single or the removal effect is poor, energy consumption is large, secondary pollution is caused, cost is high, and the environment-friendly performance is poor are overcome. The novel efficient automatic indoor air purification device is complete in air purification and disinfection effect, simple in structure, high in efficiency, low in energy consumption and noise, capable of saving maintenance cost, long in service life and capable of being practically applied to various indoor environments such as medical treatment institutions, enterprise and public institutions, public occasions, storerooms, workshops and houses.

The invention discloses an SCR (Selective Catalytic Reduction) catalyst containing synthetic zeolite and iron, and particularly relates to an SCR catalyst which always has an NOx purifying property in a low-temperature region after being subjected to relatively long-term action of hot water and relatively long-term action of sulfur oxides. A preparation method of the SCR catalyst, disclosed by the invention, comprises the following steps: crystallizing a hydrogenised synthetic zeolite with maximal oxygen cycle number of 8-12 and a three-dimensional structure by using a mixing procedure, and blending with a ferric nitrate (III) water solution or ferric chloride (III) water solution with a pH value of 0.1-0.7 to obtain the SCR catalyst without a filtering procedure and a cleaning procedure.

The invention provides a twin tower tandem exhaust gas purifying processing combination device which adopts a biomembrane packing tower system utilizing catalytic oxidant cyclically spraying liquid in the front and a biomembrane packing tower system utilizing pH buffering agent cyclically spraying liquid in the rear, which can carry out purifying processing to simultaneously remove the SQ2 and the NOx in the exhaust gas and to obtain by-products, namely, the utilizable sulphuric acid and nitrating acid products. The invention is characterized in that desulphuricants and denitrifier complex bacteria with the performance of simultaneously removing SQ2 and NOx in the exhaust gas under the conditions of liquid-phase catalyzed oxidation and pH acid environment can be obtained by screening and culturing and domesticating, and the composite bacteria biofilm to manufacture the biomembrane packing tower which is arranged in the tandem front end and is mainly used for removing SQ2; and the biomembrane packing tower which is mainly used for removing NOx in the rear is manufactured by adopting the denitrifier complex bacteria biofilm with the performance of removing NOx in the exhaust gas under the condition of pH neutral environment through screening and culturing and domesticating.

The invention discloses an SCR catalyst containing synthetized zeolite and copper-iron composite bases, in particular an SCR catalyst which still has a NOx purification property in a low-temperature region after an aquathermal durability test and a sulfur oxide durability test. The preparation method of the SCR catalyst disclosed by the invention comprises the step of concocting a hydrogenated synthetized zeolite crystal with an aqueous solution through a mixing working procedure, wherein the largest oxygen ring number of the hydrogenated synthetized zeolite crystal is 8, and the hydrogenated synthetized zeolite crystal has a three-dimensional structure; the pH value of the aqueous solution is 0.1-0.7, and the aqueous solution contains copper (II) ions and iron (III) ions; a filtration working procedure and a cleaning working procedure are not needed.

The invention discloses a grease decoloring agent, relates to a purification and adsorption material, and especially relates to the grease decoloring agent of aluminum-based hydrate composite materials and a preparation method thereof. The grease decoloring agent is characterized by being prepared by selecting two or more than two aluminum-based hydrates having the adsorption property, carrying out mixing homogenization and then adding an acidic modifying agent for modification and activation. The grease decoloring agent is a mixture of the aluminum-based hydrate composite materials. The materials have the advantages of less using amount, good decoloring effect, easy filtration and separation, small residual oil rate and the like; moreover, the decolorizing agent does not contaminate products; after medium temperature roasting after decolorization, the decolorizing agent can be used in a raw material of a high temperature coating layer material, thereby reducing the decoloring agent cost; and the grease decoloring agent fully meets the requirements of food-grade grease on indicators of the chromaticity and the impurity content, and is easy to popularize and apply.

An air cleaner apparatus (102) has an air cleaner case (105), a main filter element (170) dividing an interior of the air cleaner case (105) into a first chamber (115) and a second chamber (145), an intake passage (130) for sucking air outside the air cleaner case (105) into the first chamber (115), a discharge passage (148) for discharging the air within the second chamber (145) out of the air cleaner case (105), and a pre-filter element (138) including a wet-type element disposed in the first chamber (115). The intake passage (130) has an air outlet port (132) for blowing off air into the first chamber (115). The pre-filter element (138) is disposed spaced apart from the air outlet port (132) so as to be positioned on the axis line of the air outlet port (132).