213results about "Dispersed particle separation" patented technology

A gas sampling line having a channel for conducting respiratory gases from a patient respiratory interface to a gas monitor, the gas sampling line comprising, i.a., a gas sampling tube comprised of a polyether block amide material, the polyether segments of which comprise polyethyleneoxide. Use of a tube comprised of a polyether block amide material, the polyether segments of which comprise polyethyleneoxide, for sampling of respiratory gases; and a method for sampling of respiratory gases, the method comprising conducting respiratory gases through such a tube. A gas analysis system for analysing respiratory gases, comprising a gas sampling line as defined above and a gas monitor connectable to the gas sampling line.

A detection device for internal combustion engines exhaust gases post-treatment systems has a casing (2, 3) housing a circuit arrangement (21, 31) including humidity sensor means (32), for measuring the humidity of the gas. The circuit arrangement further comprises temperature sensor means (33) and pressure sensor means (22), for detecting a gas temperature value and a gas pressure value, respectively. The gas temperature value can be used for compensating the humidity value obtained through the humidity sensor means (32) and the pressure value can be used for deducing the clogging degree of a filter of the post-treatment system. Preferably the pressure sensor means (22) are housed in a first chamber (8) of the casing (2-3) while the humidity sensor means (32) and the temperature sensor means (33) are housed in a second chamber (10b) of the casing (2, 3).

The invention provides a sludge-based adsorbent used for desulfurization and demercuration of flue-gas and a preparation method thereof. The sludge-based adsorbent employs municipal sludge and/or papermaking sludge as a raw material. The preparation method comprises the following steps: adding an activator and a physical conditioning agent into sludge slurry and carrying out mixing under stirring and mechanical dehydration; carrying out grinding and screening after drying; and carrying out physical activation after pyrolysis in an inert atmosphere so as to prepare the sludge-based adsorbent. According to the invention, the sludge slurry is used as a raw material, and uniformity of the activator and the physical conditioning agent is improved by using a wet method and the means of mixing; the activator and the physical conditioning agent can reduce repulsive interaction and hydrophilic interaction among electronegative sludge particles, and a porous lattice structure with a hard texture and good permeability is formed in a sludge cake obtained after pressure filtration and dehydration; the prepared adsorbent can be used for desulfurization and demercuration of flue-gas; and the preparation method has the advantages of simple procedures, easily controllable conditions, capacity of realizing harmony and unity of sludge treatment and resource utilization and good economic benefits, environmental benefits and social benefits.

A composite oxide includes CeO₂, ZrO₂ and a metallic oxide being free from reacting with CeO₂ and ZrO₂ at 700° C. or more, preferably at 900° C. or more and further preferably at 1,000° C. or more. The composite oxide has a regulatory oriented phase, such as a pyrochlore phase, etc., in which at least a part of Ce cations and Zr cations are oriented regularly. The composite oxide makes a catalytic support. The CeO₂—ZrO₂ composite oxide and the reaction-free metallic oxide make barriers each other which suppress the granular growth when the composite oxide is subjected to high-temperature heat in a reducing heat treatment to form the regulatory oriented phase. The regulatory oriented phase improves the oxygen storage-and-release capability of the catalytic support. Thus, it is possible to simultaneously attain a large a specific surface area and a high oxygen storage-and-release capability.

The invention relates to a calcium sulfate catalytic oxidation process in limestone-gypsum wet flue gas desulfurization, which adopts the technical proposal that soluble ferrous salt and manganic salt or the mixture of the soluble ferrous salt and magnetic salt is used as catalyst and added in the slurry with absorbed SO2; the concentration of the soluble ferrous salt and manganic salt is 0.001 to 0.05mol/L; the pH value of the slurry with the added catalyst is 5 to 6. The calcium sulfate catalytic oxidation process has the advantages of greatly increasing the oxidation rate of the calcium sulfate, stabilizing the pH value of the system, facilitating the desulfurization operation with cheap and recyclable catalyst in the absorption tower, increasing the absorption rate of the SO2 due to the increased the oxidation rate of the calcium sulfate and reducing the scale possibility of the system.

The invention relates to a method for degrading malodorous gas by coupling a biotrickling filter with dielectric barrier discharge and is used for mainly solving the problem in the prior art that total hydrocarbon cannot be effectively degraded when malodorous components in malodorous waste gas are effectively removed. By adopting the method for degrading the malodorous gas by coupling the biotrickling filter with the dielectric barrier discharge, the malodorous gas enters a buffering tank after entering a water-membrane separator to remove one part of water; after the waste gas flowing out of the buffering tank is monitored by a total hydrocarbon analyzer, the detected waste gas enters dielectric barrier discharge plasma equipment; the waste gas discharged from the dielectric barrier discharge plasma equipment is treated by an ozone analyzer to remove ozone, and then enters at least one biotrickling tower; the waste gas treated by the biotrickling tower is discharged from the biotrickling tower. By adopting the technical scheme, the problems are solved and the method can be used for degrading the malodorous gas.

The invention discloses a zoning oxidation ozone distributor, and an arrangement mode and applications thereof. The zoning oxidation ozone distributor comprises an ozone distributor main body and ozone convey pipelines; the ozone distributor main body is longitudinally divided into a plurality of distribution zones by separating plates; a group of ozone convey pipelines is arranged in each distribution zone; and the ozone convey pipelines are arranged on one end of the ozone distributor main body. The zoning oxidation ozone distributor comprises a plurality of oxidation zones, ozone local excess supply is realized at conditions that the total ratio of ozone to NOx is relatively low, orientation increasing of the ratio of easily absorbable N2O5 in oxidation products is achieved, and flue gas denitration efficiency is increased; and in addition, flue gas in the distribution zones is mixed to eliminate local unreacted ozone; the zoning oxidation ozone distributor is simple in design, andhigh in operationality, is capable of reducing denitration technology cost effectively, is obvious in engineering advantages, and is suitable for wide applications in the field of oxidation-absorptiondenitration technology.

The invention discloses a catalytic purification method of chlorobenzene waste gas. The invention includes the following steps: the reaction is carried out by introducing humid air into the waste gas containing chlorobenzene in the presence of the catalyst; the catalyst is composed of a carrier which is stable in humid air, transition metal oxide which is carried on the carrier, rare earth oxide and phosphoric acid; the using method of the invention is that, the invention can stably convert the chlorobenzene in the waste gas into carbon dioxide and hydrogen chloride in a long time in humid air, at lower reaction temperature and in the presence of oxidation decomposition catalyst, while the activity of the catalyst is not reduced; the catalyst is composed of transition metal oxide and rare earth oxide, so the cost of the catalyst is low. The invention uses the extremely economical method for eliminating chlorohydrocarbon in the waste gas, has no formation of polychlorinated by-products and does not cause secondary pollution, so the invention is a very effective method for the treatment of the waste gas containing chlorohydrocarbon and has greater environmental protection application prospect.

A method for operating an internal combustion engine, in whose exhaust gas system an exhaust gas treatment device is positioned, a reagent, which is possibly mixed with compressed air, being introduced into the exhaust gas system upstream from the exhaust gas treatment device, and a device for performing the method. The reagent is brought to a predefined reagent setpoint pressure using a reagent pump and subsequently metered using a reagent dosing valve. The reagent pressure existing upstream from the reagent dosing valve is detected. In the framework of a diagnosis, a time curve of the reagent setpoint pressure is predefined. The reagent pressure detected during the diagnosis is compared to at least one predefined threshold value. If the threshold value is exceeded, an error signal is provided. The corresponding diagnosis of a compressed air path may be provided alternatively or additionally to the diagnosis of the reagent path.

The invention discloses a copper and iron compound honeycomb coating type denitrification catalyst as well as a preparation method and application thereof. The catalyst provided by the invention takesa copper-based molecular sieve prepared through an ion exchange method or an immersion method as an active component, ferric polysilicate is added as a co-catalysis component, a honeycomb cordieriteceramic block is used as a carrier and an aluminum sol is used as as a binder. The catalyst prepared by the invention is prepared through a vacuum coating method; the preparation method is simple to operate, holes are not liable to block in a coating process and large-scale production is easy to realize; a coating has a large capacity and the coating fastness of active components is high; a good cooperative catalysis effect is formed between duplex metal including copper and iron, the denitrification activity of the catalyst is improved and the anti-H2O performance and anti-SO2 performance ofthe catalyst are also improved. The catalyst provided by the invention has a denitrification efficiency of 90 percent or more in a range of 220 to 510 DEG C and has a good application prospect in a stationary source denitrification direction.

The invention discloses a phosphor-doped CHA molecular sieve, and a preparation method and application thereof, and belongs to the field of zeolite molecular sieve preparation technology and application. The preparation method is characterized by comprising the following steps: mixing a silicon source, an aluminum source, sodium hydroxide, potassium hydroxide, SAPO-18, AlPO-18 or SAPO-34 seed crystal and distilled water to form uniform gel; performing hydrothermal crystallization, performing washing and drying after performing solid-liquid separation on a crystallized product, thereby obtaining the phosphor-doped CHA molecular sieve which can perform ammonia gas selective catalytic reduction denitration catalysis after being loaded with Cu<2+>. Addition of seed crystal such as SAPO-18 is akey factor for generating the phosphor-doped CHA molecular sieve. The method can be used for preparing the phosphor-doped CHA molecular sieve with high degree of crystallinity under a conventional hydro-thermal synthesis condition, so that ammonia gas selective catalytic reduction denitration (NH3-SCR) low-temperature activity is good.

The invention relates to a method for synchronously removing sulfur dioxide and fine particles in smoke through electrical charge and mist spray. The method performs pre-charge (positive charge) for absorption liquid through an external electrical charge spray gun, and uses compression molding air for spraying the absorption liquid input in the spray gun into a desulfurization tower in a mist manner; the mist drops of the absorption liquid with the positive charge are reacted with the sulfur dioxide in the smoke; and the fine particles in the smoke are captured through an electrical charge coagulation effect. The large drops in the desulfurization tower directly drop to the bottom of an absorption tower; the small drops are captured when entering a demisting device along with the smoke, and flow to the bottom of the desulfurization tower along the tower wall; and finally, the absorption liquid can be recycled after the regeneration treatment. The synchronous and efficiency removal of the sulfur dioxide and the fine particles in coal-fired flue gas can be realized through the method. Compared with the prior art, the method has such characteristics as high efficiency and low energy consumption.

The invention relates to a high-temperature iron-based zeolite molecular sieve honeycomb type denitration catalyst and a preparation method thereof, and belongs to the technical field of atmospheric pollution treatment technologies and environmentally friendly catalyzing materials. The preparation method comprises the following steps: mixing ferrous salts with ferrite; synthesizing a zeolite molecular sieve, natural zeolite molecular sieve powder, attapulgite clay or kaolin, glass fibers, an organic binding agent, wood pulp or sesbania cannabina powder, stearic acid and glycerinum; and carrying out mixing, ageing, extrusion forming, drying and roasting to obtain the iron-based zeolite molecular sieve honeycomb type denitration catalyst. According to the catalyst, the zeolite molecular sieve and natural raw mineral materials which have excellent thermal stability are used as carriers, and the running stability, the sintering resistance and the mechanical strength of the catalyst in a high-temperature environment are improved. The obtained honeycomb type denitration catalyst has good water resistance and sulfur poisoning resistance, and the conversion ratio of oxynitride is greater than 90% under the conditions that the temperature is in the high-temperature range of 400-600 DEG C and the air speed is 10,000 h<-1>.

The invention relates to a method for recovering oil gas and a device. A combined technology that frozen brine is directly condensed-adsorbed/desorbed to regenerate is adopted to recover the oil gas; and in a direct condensation part, low-temperature brine and collected oil gas are adopted to be directly mixed with oil gas at the condensation part. The method and the device, provided by the invention, have the characteristics of large operating flexibility, low energy consumption, small investment, no potential safety hazard, reach ability in tail gas emission standards, and the like, and can be applicable to the loading/unloading of oil products for vehicles and ships and the oil gas recovery in circumstances, such as oil tank breathing, and the like.

The invention relates to a novel method for removing indoor formaldehyde by nano manganese dioxide. The method comprises the following steps: KMnO4 and MnSO4 are subjected to synthesis to obtain MnO2 at normal temperature, other metal ions are doped, and different metals-doped nanocapsule MnO2 spheres can be obtained. From the research result, the metal-supported nano MnO2 has a following sequence for oxidizing catalytic activity of formaldehyde under low temperature: Ag/MnO2 is greater than Cu/MnO2, Cu/MnO2 is greater than Zn/MnO2. A catalyst is composed for minimal rod-shaped object with average diameter of 40 nm. When the other metal is supported, the catalytic activity of the catalyst is greatly increased by comparing with pure MnO2. The supported metal is existed as simple substance and ion forms. The reason of increase of the catalyst activity is that when metal and MnO2 are combined, strong mutual effect is generated. Passing of oxygen in air through MnO2 to an active site is easier, so that formaldehyde oxidation under low temperature can be easier.

A moisture removal system having a crop drying enclosure for holding a crop product to be dried. A closed loop air circulation system is provided which includes a moisture removal enclosure for removing moisture from circulating air along with air ducting operatively connecting the moisture removal enclosure to the crop drying enclosure air inlet to form a closed loop moisture removal air system. A heat pump system, including a compressor, a first heat exchanger capable of operation as a condenser, along with two additional heat exchangers, each capable of operating as either a condenser or evaporator are positioned within the moisture removal enclosure, to remove excess moisture from the circulating air without the addition or extraction of heat from the ambient air temperature.

Disclosed is a humidifier apparatus using a photocatalyst having an air-cleaning function, and more particularly, to a humidifier apparatus using a photocatalyst having an air-cleaning function, which is capable of performing an indoor air-cleaning function and a humidifier function while minimizing energy consumption.

An integrated apparatus for separating a mixture of carbon dioxide and at least one other gas and for separating air by air distillation is provided. The apparatus includes a CO₂ separation unit configured to separate the mixture, an air separation unit configured to separate air by cryogenic distillation, a water cooling tower that operates by direct contact, a line for sending water to the top of the tower, a line for sending at least one portion of the nitrogen-enriched gas stream to a lower level of the tower, a cooled water line for withdrawing cooled water from the tower and means for cooling the air upstream of the air separation unit, the cooled water line being connected to means for cooling the air upstream of the air separation unit and to the inlet and/or to the outlet of the unit for separating the gaseous mixture.

The present invention relates to a low SO ₂ /SO ₃ SCR denitrification system with high conversion rate, a heat exchanger is installed between the first layer catalyst and the second layer catalyst of the SCR reactor, the heat exchange through the heat exchanger can reduce the temperature of the flue gas entering the second layer catalyst, and the heat exchanger inlet has flow The regulating valve can control the flow of cooling medium. The invention can greatly reduce the conversion rate of SO2/SO3 when the unit is in normal operation without affecting the denitrification effect, thereby effectively reducing the problem of ABS deposition in the power plant.

The invention relates to a method for controlling pollutant discharge, and aims to provide a method for controlling dioxin discharge in flue gas by using sulfurous iron ore in the process of burning and processing solid wastes. The method comprises the following steps: throwing the sulfurous iron ore and trash to an incinerator, and controlling the added quantity, and keeping the concentration of sulfuric dioxide in the flue gas at an outlet of the incinerator to between 200 and 400mg/Nm. The dioxin restraining method has a simple process, does not need to change the incinerator and a flue gas processing system, has remarkable effect on dioxin restraining, and simultaneously can reduce the dioxin discharge in the flue gas and fly ash. The adopted sulfurous iron ore has low price and wide resources. In addition, the method has significant application value to solving the problem of the dioxin discharge in the process of burning wastes.

The invention relates to a reductant supply system for a waste gas cleaning catalyst ( 1 ) of an internal combustion engine, particularly a motor vehicle, comprising a reductant tank ( 3 ) for the storage of reductants, at least one electrically heatable fluid duct ( 6, 8 ) for the conveyance of reductant from the reductant tank ( 3 ) to a waste gas cleaning catalyst ( 1 ), a pump ( 5 ) to pump the reductant via the fluid duct ( 6, 8 ) from the reductant tank ( 3 ) to the waste gas cleaning catalyst ( 1 ), and a plug-in connection ( 10, 11 ) for connecting sections of the fluid duct ( 6, 8 ) in a fluid-conveying manner and/or connecting the fluid duct in a fluid-conveying manner to a component of the reductant supply system, wherein the plug-in connection additionally forms an electric connection line ( 12, 13, 14 ); which in operation conveys an electrical heating current for heating of the fluid duct ( 6, 8 ). The invention relates also to a plug-in connection ( 10, 11 ) for connecting a heatable fluid duct section ( 8 a, 8 b) as well as a female connector ( 10 ) and a male connector ( 11 ) of such plug-in connection.