6604results about How to "Improve purification efficiency" patented technology

A method for forming an oxide film by plasma-assisted cyclic processing, includes: (i) supplying a precursor to a reaction space wherein a substrate is placed; (ii) applying a first RF power to the reaction space for a first period of time without supplying a precursor; and (iii) applying a second RF power to the reaction space for a second period of time without supplying the precursor, wherein the first RF power is lower than the second RF power, and/or the first period of time is shorter than the second period of time.

The present invention relates to an integrated closed loop system for aquaculture in at least one culturing tank and using continuous bioreactor technology for the biological treatment and removal of organic material, nitrogen and phosphorous, comprising: an integrated, partially or wholly closed loop system for waste water treatment, where the water contains nitrogen containing compounds and/or substances, comprising at least one production unit of such nitrogen containing compounds and/or substances and using continuous bioreactor technology for the biological treatment and removal of organic matter, nitrogen and phosphorous from the said water at continuous flow, comprising: a) at least one suspended carrier bioreactor for bacterial growth under anoxic conditions to cause anaerobic denitrification, with one or several compartments, preceding b) at least one suspended-carrier bioreactor for bacterial growth under oxic conditions to cause aerobic nitrification, c) the denitrification taking place after the production unit, and d) the nitrification taking place prior to the production unit in a by-pass mode as part of the continuous flow.

A centrifugal cleaning apparatus for the air or fume, such as treating oil soot, exchanging air, and desulfurizing fume, features that at least one rotary netted filter disc is arranged to the axle of a motor in an air guiding cylinder. Said rotary netted filter disc is composed of a disc skeleton and a radiant filtering net wound uniformly on said disc skeleton. A method for preparing said rotary netted filter disc is also disclosed.

A honeycomb structure having porous partition walls having a large number of pores, formed so as to produce a plurality of cells each extending between the two ends of the honeycomb structure, and plugged portions formed so as to plug the cells at either one end of the honeycomb structure or at the insides of the cells, wherein the honeycomb structure has the partition walls of a permeability of 7×10⁻¹² to 4×10⁻⁸ m². The honeycomb structure can provide a honeycomb catalyst structure which is superior in purification efficiency, is low in pressure loss and can be mounted even in a limited space.

The invention relates to the chemical technology field, and concretely relates to a formaldehyde scavenging agent with oil solubility and a preparation method and a usage method. The formaldehyde scavenging agent with oil solubility can be prepared to paint, and can be used for coating on the furniture, floor or other decoration sheet materials, and has good purification efficiency on indoor free formaldehyde, and no secondary pollution can be generated. On the premise of no change of the sheet material application and construction technology in the prior art, and the release of indoor formaldehyde can be fundamentally controlled. The preparation method is simple, the usage is convenient, and the formaldehyde scavenging agent is suitable for large-scale production and business application for enterprises, has good application prospect, and has obvious economy and social benefit.

The invention relates to a coal-fired power plant coal dust prepared activated coke flue gas comprehensive purification system and a technology. The technology provided by the invention comprises the following steps of: using coal dust in a coal-fired power plant as a raw material, simultaneously carrying out carbonization and activation on coal dust in an activated coke preparation reactor to obtain powdered activated coke, using pyrolysis gas obtained during the preparation process as reburning fuel and sending it into a boiler so as to remove part of NOx; sending the powdered activated coke into a flue gas adsorption tower, adsorbing pollutants such as sulfur dioxide, mercury and the like at an appropriate temperature, injecting ammonia gas and nitrogen oxide to perform a catalytic reduction reaction so as to remove nitrogen oxide; reusing the adsorbed activated coke after regeneration; sending the activated coke into the boiler for combustion after multiple adsorption/regeneration; regenerating the activated coke after adsorbing sulfur dioxide to obtain high-density sulfur dioxide gas to realize resource utilization. By the utilization of coal resources in a coal-fired power plant, the comprehensive purification of flue gas and the resource utilization of sulfur dioxide are realized without discharge of waste water, exhaust gas and solid waste.

A separable air purifying apparatus is provided, in which a number of purifiers whose purifying capabilities for particular pollutants are reinforced by each purifier are disposed in a space meeting each purifying characteristic in order to enable an independent operation for a custom-made purification, and are integrally combined with each other to thereby make a combination of a driving ratio of each purifier according to a degree of pollution and perform a combination operation of purification. The separable air purifying apparatus inhales external air by ventilation modules incorporated in respective cases and purifies the external air by filter members, to then discharge out the purified air. That is, the separable air purifying apparatus includes controllers controlling the ventilation modules and a main purifier and an auxiliary purifier each which are independently operated by respective power supplies. Here, an output terminal is formed in the main purifier and an input terminal is formed in the auxiliary purifier. When assembling the main and auxiliary purifiers, the input terminal of the auxiliary purifier is connected with the output terminal of the main purifier, to thus enable the controller of the main purifier to drive the ventilation module of the auxiliary purifier, and to accordingly enable a combination operation of the main and auxiliary purifiers.

An exhaust gas purifying filter having a high strength and an excellent efficiency of exhaust gas purification and a method for manufacturing the same are provided. An exhaust gas purifying filter 1 comprises a ceramic honeycomb structure 2 having a surrounding wall 21, partition walls 22 provided in a honeycomb pattern within the surrounding wall 21, and a plurality of cells 23 partitioned by the partition walls 22 and penetrating through end faces 241, 242. If a virtual line 3 is drawn on the end faces 241, 242 of the structure 2 by continuously connecting points at a distance of 1.0 to 3.0 times the cell pitch in the direction toward the center from an inner surface 211 of the surrounding wall 21, not less than 90% of a peripheral area 25 outside the virtual line 3 is blocked with plug material 4.

The invention relates to a formaldehyde adsorbent and a preparation method. The formaldehyde adsorbent consists of a basis material, a high molecular organic amine polymer and a polylol polymer, wherein the high molecular organic amine polymer and the polylol polymer account for 1 to 50 percent of the formaldehyde adsorbent, and the balance being the basis material. The preparation method for the formaldehyde adsorbent comprises steps of preparing formaldehyde reagent, preprocessing the basis material, solidifying and forming, and the like. When the formaldehyde adsorbent adsorbs formaldehyde, formaldehyde gas can quickly enrich on the surface of the formaldehyde adsorbent, and carries out chemical reaction to generate substances harmless to human body, so as to achieve the effect of uninterruptedly and thoroughly removing the formaldehyde; the adopted raw materials are nontoxic and harmless; the preparation technology has simple and easily controlled process; and the prepared formaldehyde adsorbent is safe and environment-friendly, and has no secondary pollution.

The invention relates to long-acting and stable oxyntomodulin (OXM). An Fc segment of human immunoglobulin G and the human OXM form fusion protein through a connecting peptide. A method for preparing the fusion protein comprises the following steps of: preparing the human OXM and an Fc segment gene of the human immunoglobulin respectively, and connecting the human OXM and the Fc segment gene of the human immunoglobulin to construct connecting segment-containing recombinant expression vectors; and transforming host cells by using the recombinant expression vectors, culturing the host cells and recovering from cell culture and purifying the host cells to obtain the recombinant fusion protein. The fusion protein can be used for preparing medicaments for treating metabolic diseases such as diabetes and obesity.

This invention provides a honeycomb catalyst having an excellent purification efficiency and a small pressure loss and can be mounted even in a limited space, the honeycomb catalyst comprising: porous partition walls 4 having plural pores 25, which are arranged to form plural cells 3 allowing communication between two end faces; plugging portions being arranged to plug the cells 3 in one of the end faces; and catalytically active components 5, 15 loaded on surfaces of partition walls 4 and inner surfaces of pores 25, wherein many catalytically active component-loading pores 35 through which a gas can pass are formed in partition walls 4, and a ratio of a mass (M_W) of the catalytically active component loaded on the surfaces of partition walls 4 to a mass (M_P) of the catalytically active component 5 loaded on the inner surfaces of the pores 25 is (M_W):(M_P)=1:3 to 3:1.

A catalytic converter having an excellent purification efficiency and small pressure loss and a method for producing the same is provided. A catalytic converter comprises a catalyst coating layer which is coated on the surface of the partition walls of the honeycomb structural body having partition walls which divide and form a plurality of cells functioning as fluid passages. 10% or more of the plurality of the cells are plugged by the plug portions which are formed at the one end or the middle of the passage, the average maximum distance of image of the honeycomb structural body is 10 μm or more and the porosity of the honeycomb structural body is 40% or more, the catalyst coating layer contains at least one oxide selected from the group consisting of alumina, ceria, titania, silica and zirconia, and also a catalyst containing at least one precious metal selected from the group consisting of platinum, rhodium and palladium, or metal exchanged zeolite or vanadium is supported in the catalyst coating layer as the catalytic active constituent, the average maximum distance of image of the catalyst coating layer is 10 μm or more, and the porosity of the catalyst coating layer is 40% or more.

A process for preparing natural gel of magnesium aluminium silicate from bentonite, attapulgite, bentone, etc includes such steps as pulverizing, preparing slurry, adding pour depressor, stirring, dynamic centrifugal separation, adding inorganic salt containing one-valence metal ions, stirring, pre-activating, adding organic salt containing at least Na ions, stirring for modifying, and post-treating.

The invention discloses an automatic shifting air purifier, which comprises a shell, air inlets, a clean air outlet, a filter screen, a fan and a control circuit, wherein the two side faces of the front part of the shell are provided with the air inlet respectively; the upper side face of the tail part of the shell is provided with the clean air outlet; the filter screen is arranged in the shell;the fan is arranged between the filter screen and the clean air outlet; the outer side of the shell is provided with a gas sensor, a fine particle sensor and a shift indicating lamp; the inner side of the shell is provided with the control circuit; the signal output ends of the gas sensor and the fine particle sensor are electrically connected with the control circuit; and the control end of the control circuit is electrically connected with the fan and the shift indicating lamp respectively. The quality of indoor air is sensed by using the gas sensor and the fine particle sensor, and the flow of purified air is adjusted by automatically adjusting the rotating speed of the fan according to the air quality with the control circuit, so that the air purifying efficiency is increased effectively.

The invention discloses a multifunctional system for rainwater infiltration, collection and storage and purification of a sponge city.The system comprises a bioretention pond and water storage wells.Firstly, appropriate positions are selected for digging of a foundation pit of the bioretention pond and the water storage wells, and the portions, 5-10 cm away from the two sides of the bioretention pond, of the road surface are paved with opened vertical curb belts.The bioretention pond sequentially comprises a gravel covering layer, a vegetation planting soil layer, a biochar packing layer and a gravel drainage layer from top to bottom, and the periphery and bottom of the bioretention pond are both paved with anti-seepage thin film.An overflow pipe is laid on the gravel drainage layer, an upper end overflow opening is 5-10 cm higher than the gravel covering layer, and the lower end of the overflow pipe is connected with a municipal drainage pipe network.The system can be used at the places such as residential areas, schools, parking lots, parks and roads, not only can rainwater be stored, but also the content of pollutants such as nitrogen, phosphorus and heavy metal can be reduced, the purpose of recycling is achieved, city water logging is effectively relieved, and the rainwater use efficiency is improved.

An ammonia selective reduction-type NOx catalyst (48) is interposed in an exhaust passage of an engine (2) provided in a series-type hybrid electric vehicle (1), and a urea water injector (52) is disposed in the exhaust passage to supply a urea water into exhaust gas existing upstream of the ammonia selective reduction-type NOx catalyst (48). The engine (2) is started and stopped in accordance with the storage state of a battery (8), and the urea water injector (52) is controlled in accordance with the operating state of the engine (2). When the engine (2) is to be stopped, an adsorption increasing operation for increasing the amount of ammonia adsorbed by the ammonia selective reduction-type NOx catalyst (48) is executed over a predetermined period before the engine (2) is stopped.

The invention discloses a method of room air purification with low temperature plasma generated by dielectric resistance discharging. The harmful gas of air can be wiped off by dielectric resistance discharging plasma which is in magnetic field: the needle plate electrode is the reaction electrode, the dielectric resistance discharging can be realized by inserting a dielectric-slab which is 1mm-5mm in thickness at the side of the plate electrode, the distance of the needle electrode is 6mm-30mm, the nanosecond frontal high-voltage narrow pulse power supply is applied to the two ends of the needle plate electrode, the voltage is 10kv-60kv, the permanent magnet is mounted on the two ends of the electrode; The harmful gas of air can be wiped off by pulse discharging plasma which is in magnetic field. At the base of parallel magnetic field, the harmful gas can be wiped off by the low temperature plasma generated by the nanosecond frontal pulse dielectric resistance discharging in the invention, so the purification efficiency is improved greatly.