36results about "Air quality improvement" patented technology

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.

A urea solution apparatus for a vehicle may include a urea solution storage tank installed in a side of a lower part in a rear part of a car body, and a urea solution pipe configured to inject a urea solution into the urea solution storage tank, wherein the urea solution pipe is connected to the urea solution storage tank in such a way that a urea solution injection nozzle of the urea solution pipe is located in a space in which a fuel inlet hole is provided.

The invention relates to a method pertaining to an SCR system for exhaust cleaning, whereby reducing agent is supplied to a feed device (230) which supplies it to a dosing unit (250) for batched supply of reducing agent by means of a valve arrangement (350, 360) at a consumption point in the SCR system. The method comprises the steps of - continuously determining (s410) the cumulative number of doses injected (N) by said dosing unit (250), - continuously comparing (s420, s430) said cumulative number of doses injected (N) with a predetermined numerical value (TH), and - delivering an indication (s440) when said cumulative number of doses injected (N) exceeds said predetermined numerical value (TH). The invention relates also to a computer programme product comprising programme code (P) for a computer (200; 210; 500) for implementing a method according to the invention. The invention relates also to an SCR system and a motor vehicle (100; 110) equipped with the SCR system.

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.

The invention provides an ionic liquid dehumidifying method and an ionic liquid dehumidifying system for regulating gas humidity. The ionic liquid dehumidifying method comprises the following steps: enabling gas with higher humidity to sufficiently contact with a gas dehumidifying agent barren liquor, thus at least enabling moisture in the gas to be absorbed by the gas dehumidifying agent barren liquor to obtain a gas with lower humidity and a gas dehumidifying agent rich liquor; the gas dehumidifying agent barren liquor contains ionic liquor at least capable of absorbing water. Preferably, ionic liquid is adopted as the gas dehumidifying agent barren liquor. Preferably, the ionic liquid can also absorb volatile organic compounds. Water in the gas can be efficiently and fast removed by adopting the ionic liquid as a dehumidifying agent, the needed equipment is simple, and the system can stably and reliably run, and is safe and environment-friendly. The ionic liquid dehumidifying method and system are especially applicable to manufacturing shops needing to control air humidity, such as lithium battery, medicament manufacturing shops, and dried warehouses; and also, the ionic liquid dehumidifying method and system can also be applied to dewatering and purification technology of natural gas, associated gas and the like.

The invention relates in particular to a reservoir for a urea-based reducing agent, with an integrated electric heating element, usable on a heat engine vehicle for pollution control. The heating element (10) provided to thaw the reducing agent (6) is placed inside a cavity (16) delimited by a bowl (13), itself placed inside the reservoir (1). The cavity (16) of the bowl (13) communicates with the inner volume (5) of the reservoir by a valve (20). A suction pipe (12) for the reducing agent is submerged in the cavity (16) of the bowl (13), the starting point (18) of said pipe being situated near the heating element (10). Operation is thus guaranteed when the vehicle is under sloping and inclined conditions, and also in case of freeze.

The invention provides a biological comprehensive treatment method of indoor decoration pollution, and relates to the technical field of indoor decoration pollution and decoration material pollution treatment. The treatment method comprises: (1) using the surface pollution oxidation method in the chemical methods, and using the chemical reagent to oxidize the benzene series on the surface of the solid wood paint; (2) using the straying gun to spray on the surface of the material and the furniture; (3) adopting a biological method, wherein biological aldehyde clearing enzyme to clear indoor formaldehyde and other harmful gases. According to the present invention, the comprehensive treatment method is adopted, the application range is wide, no secondary pollution is generated, the used materials are the green environmental protection products, and the practicality is strong.

The invention discloses a steam waste heat gradient utilization system for a carbon capture absorbent regeneration system. A reboiler in the steam waste heat gradient utilization system is communicated with a low-pressure cylinder of a steam turbine through a low-pressure supersaturated steam supply pipeline, a temperature reducing unit cools low-pressure supersaturated steam, the reboiler is communicated with a low-pressure flash evaporation unit through a condensed water supply pipeline, the low-pressure flash evaporation unit is communicated with a low-temperature multi-effect distillationunit through a low-temperature steam supply pipeline, and condensed water in the low-pressure flash evaporation unit returns to a steam-water circulation system of a waste heat boiler at the temperature of 70 DEG C or below. According to the invention, under the condition that carbon capture is carried out, seawater desalination or high-salinity wastewater treatment is carried out by utilizing thewaste heat of the capture unit, the natural gas-steam combined cycle-CO2 capture unit energy gradient utilization is achieved, meanwhile, co-production is achieved, the overall economy is improved, the temperature of condensate water returning to a steam-water circulation system of the waste heat boiler is reduced, and then flue gas waste heat in a waste heat boiler system is fully utilized.

The invention relates to the technical field of air purification, and more particularly relates to an air purification device and method. The air purification device includes a housing and an air inlet fan, a molecular sieve purification assembly, an air outlet assembly, and a molecular sieve circulation assembly arranged in the housing; the air inlet fan and the air outlet assembly are respectively arranged on the two sides of the molecular sieve purification assembly; the air inlet fan is provided with a first air inlet and a first air outlet for blowing air to the molecular sieve purification assembly, and the purified air is discharged through the air outlet assembly; the molecular sieve purification assembly and the molecular sieve circulation assembly are connected to form a molecular sieve circulation loop for molecular sieve heating desorption and cooling. The device and the method of invention can effectively remove VOC in the exhaust gas to reach the effect of air purification, the purified air can be recycled to achieve the effect of zero discharge, the heat in the waste heat air can be recycled, so that better energy-saving and environmental protection properties are realized; in addition, the operation is simple, the investment and operation costs are low, and good practicability and applicability are realized.

The invention discloses an air sterilizer used in a hospital laboratory. The air sterilizer comprises a box body, wherein an ultraviolet sterilizing device and a drying device are arranged in the boxbody, the ultraviolet sterilizing device comprises a first inner box body, a plurality of first partition plates are horizontally arranged in the first inner box body, a fan is arranged at the inner bottom of the first inner box body, and ultraviolet lamps are arranged between any two first partition plates and between the uppermost first partition plate and the top wall of the first inner box body. An air outlet hole is formed in the top wall or the side wall of the top end of the first inner box body, an air outlet pipe is arranged at the air outlet hole, the upper end of the air outlet pipeis connected with one end of a tee joint, the other two ends of the tee joint are respectively connected with a first air pipe and a second air pipe, and the second air pipe is communicated with an air inlet of the drying device. The ultraviolet sterilization device and the drying device are arranged so that the air in the hospital laboratory be disinfected and sterilized, the air in the hospitallaboratory can also be dried.

The invention relates to the technical field of environmental protection, in particular to integrated equipment for the efficient treatment of the volatile organic waste gas. The equipment comprises ashell arranged on a base, wherein an electronic control cabinet is arranged in the shell, the interior of the shell is successively provided with a filtering module, a UV lamp module, an activated carbon module, an ozone removal module and an air-pumping module which are connected in a closed manner, the filtering module and the air-pumping module are arranged at the upper part of the interior ofthe shell, the UV lamp module, the activated carbon module and the ozone removal module, which can be disassembled, are arranged at the lower part of the interior of the shell, the upper part of thefiltering module is provided with a waste gas inlet, and the upper part of the air-pumping module is provided with a gas discharge outlet. The external waste gas is subjected to the dust removal by the filtering module, the waste gas decomposition and deodorization by the UV lamp module, the adsorption of the incompletely oxidized organic waste gas by the activated carbon module, the decompositionof the excess ozone by the ozone removal module, and discharge up to standard by the air-pumping module. The equipment integrates dust removal, VOCs waste gas treatment and ozone removal together, and has no secondary pollution and high purification efficiency.

The invention discloses an activated carbon washing system and a washing process. The activated carbon washing system comprises a dispensing subsystem for accurate premixing of washing liquid, a washing subsystem for repeated rinsing of activated carbon, a water storage and cooling subsystem for acceleration of cooling, a purification subsystem for secondary recycling of washing wastewater, a post-treatment discharge subsystem for deep purification of the tail water produced by washing of the activated carbon, and an intelligent semi-automatic electric appliance control subsystem for controlling of the operation of the entire washing system. The activated carbon washing system of the invention has the advantages of simple operation, high degree of automation, small occupied land area and thorough rinsing, completely solves problems in the recycling, purification and discharging of reagent wastewater, reduces work intensity and improves work efficiency.

The invention discloses a monolithic catalyst with organic waste gas selective adsorption and catalytic oxidation functions, a preparation method of the monolithic catalyst and application of the monolithic catalyst in catalytic oxidation treatment of organic waste gas. A double-coating design is adopted. A first coating is a molecular sieve substrate coating, and ensures the coating firmness between a molecular sieve and a cordierite carrier. A second coating is an active component coating, and neutral silica sol is adopted to protect the activity and effectiveness of noble metals and catalytic additives on the molecular sieve. The surface coating layer of the obtained monolithic catalyst is high in loading rate, good in firmness and low in falling rate, the mechanical strength of the obtained monolithic catalyst is remarkably improved, and the service life of the obtained monolithic catalyst is remarkably prolonged. The monolithic catalyst provided by the invention can selectively adsorb VOCs and rapidly desorb generated H2O at the same time, so that the reaction is promoted to be carried out towards the catalytic oxidation direction of VOCs, and the monolithic catalyst has excellent catalytic oxidation performance for VOCs.

The invention relates to the technical field of automobile tail gas purification, in particular to a localization coating for an automobile tail gas purification catalyst, and a preparation method thereof. The coating is applied to the inner walls of channels of a honeycomb ceramic carrier arranged at a gas outlet end of an automobile engine, the honeycomb ceramic carrier comprises a front half region and a rear half region with a height ratio of 1:(1-4), a coating of the front half region sequentially comprises an inner coating, a middle coating and an outer coating, and a coating of the rearhalf region sequentially comprises an inner coating and an outer coating; and the components of the inner coating, the middle coating and the outer coating comprise a rare earth composite oxide, modified alumina, an additive and a noble metal. By partitioning the carrier into regions and coating different regions with coatings with different components, different thicknesses, and different noblemetal contents, a use amount of the noble metal on the entire honeycomb ceramic carrier can be reduced while the tail gas conversion efficiency is ensured, and thereby the cost of the automobile tailgas purification catalyst is reduced.

The invention is a volume control valve for controlling and metering a fluid in a motor vehicle, comprising a tappet with an actuating end and a free end, said tappet being received in a bearing bush and mounted along its actuating axis so as to be movable back and forth, and a seat valve which is connected to a fluid channel and arranged relative to the tappet in such a way that the free end of the tappet can engage in the valve seat and close the fluid channel when it is engaged in said valve seat, and further comprising a pressure spring which is arranged along the longitudinal axis of the tappet. According to the invention, a welded plate is fastened and/or welded and/or formed on the tappet with the pressure spring arranged thereon, which is supported on the welded plate and the bearing bush.

The invention provides a biogas carbon reduction coupling biogas slurry pollution reduction device and method based on biogas circulation type fermentation, and belongs to the technical field of environment and energy. The device comprises an electric fermentation unit, a solid-liquid separation unit, a hydrothermal carbonization unit and a product collection unit, wherein the electric fermentation unit comprises an electric fermentation tank, a cathode chamber, an anode chamber, a cation exchange membrane and a direct-current constant-voltage power supply; according to the device, biotransformation of hydrogen-philic methanogens and electrochemical cathode reduction are coupled, biogas is circulated to an anaerobic digestion chamber, in-situ biogas biological purification is carried out, ammonia nitrogen and COD in biogas slurry are removed in an anode chamber while CO2 is reduced at a cathode to generate methane, and electron transfer and conservation rules are reasonably utilized; the biogas slurry can be used for irrigation after pollution reduction, and residual pollutants in the biogas slurry can also be adsorbed by biogas residue biochar to be further purified; the biogas residues can be prepared into hydrothermal carbon to be reused for anaerobic digestion or used as an adsorbent, so that the aims of comprehensive utilization of biogas slurry, biogas residues and biogas and CO2 emission reduction are fulfilled.

The invention discloses application of organic aerogel as an air purification material, and belongs to the technical field of air treatment. The organic aerogel material is prepared by the steps of 1)preparation of a gel emulsion and 2) polymerization of the gel emulsion. The organic aerogel material as the air purification material is used for absorbing VOCs and adsorbing PM2.5 and/or PM10, hasa wide application range, is multifunctional and integrates absorption with adsorption; when the organic aerogel material is used as the air purification material to treat pollutants, the working efficiency is high, the organic aerogel material is washed and dried after saturation to be recycled, and the recycling method is simple; the organic aerogel material as the air purification material hasgreat competitiveness on the market due to the recyclability; the organic aerogel material can serve as a hydrophobic material that is not liable to moisture absorption during use.

The invention discloses a composite filter plant for a fresh air fan. The composite filter plant for the fresh air fan comprises a primary filter screen, an efficient air filter screen, an electrostatic dust removal filter screen and a photocatalyst filter screen. The electrostatic dust removal filter screen and the photocatalyst filter screen are arranged between the primary filter screen and the efficient air filter screen, the photocatalyst filter screen is a thin film filter screen, nanometer titanium dioxide and tolyltriazole are mixed with each other to manufacture the thin film filter screen, and transition metal complexes are coated on the surfaces of the photocatalyst filter screen; the electrostatic dust removal filter screen is made of polypropylene treated by electrostatic electrets. The composite filter plant for the fresh air fan has the advantages that sterilization effects can be realized by the photocatalyst filter screen without perpendicular incidence of ultraviolet light, dust removal effects of electric fields can be realized by the electrostatic dust removal filter screen without being powered on, and accordingly energy consumption can be reduced; the composite filter plant can be washed, and the filter screens are convenient to clean.

The invention discloses a preparation method of a flexible glass fiber honeycomb body. The method specifically comprises the following steps: (1) firstly immersing glass fiber mats into a forming liquid, then drying, and finally adding into a corrugating machine for forming to obtain corrugated glass fiber mats; (2) alternately overlapping the glass fiber mats and the corrugated glass fiber mats, then immersing the glass fiber mats and the corrugated glass fiber mats in a binder, and finally drying to obtain a glass fiber honeycomb body; and (3) cutting the glass fiber honeycomb body into glass fiber honeycomb body sheets along the pore channel direction, then heating, finally bending into any shape, and cooling and fixing to obtain the glass fiber honeycomb body. According to the method, the glass fiber honeycomb body is assembled by adopting the plastic binder, so that the honeycomb body is deformed by heating and shaped by cooling, can be repeated for multiple times, and has a flexible characteristic.

The invention discloses a vehicle automobile exhaust catalyst containing Ce-Zr-Fe-Mn composite oxide and a preparation method thereof. The vehicle automobile exhaust catalyst containing Ce-Zr-Fe-Mn composite oxide is prepared by taking Fe-Al-Cr alloy as a carrier and Ce-Zr-Fe-Mn composite oxide and gamma-Al2O3 as assistants, and loading active constituent Pd. The NO, CO and HC with higher atmospheric pollution in automobile exhaust are converted by the catalyst without other substances, and the catalyst has high conversion efficiency and is an automobile exhaust catalyst with low toxicity and high catalytic activity.

The invention relates to the field of elevators, in particular to a negative pressure elevator car with air disinfection and filtration functions. The technical problems that due to the fact that air circulation in an elevator shaft is poor, the quality of air exchanged by air exchange equipment is not high, people in a lift car are dense, the mobility of the people is large, under the condition that the current epidemic situation is not ended, air cannot be disinfected, and the risk of cross infection is increased are solved. According to the implementation scheme, the negative pressure elevator car with the air disinfecting and filtering functions comprises an elevator car body, negative pressure box bodies and negative pressure air exchange mechanisms, the negative pressure box bodies are fixedly connected to the upper side face and the lower side face of the elevator car body, the two negative pressure box bodies are symmetrically arranged up and down, and the negative pressure air exchange mechanisms are fixedly connected into the two negative pressure box bodies. By arranging the negative pressure air exchange mechanism, the purposes that air enters from the upper portion and exhausts from the lower portion when the elevator ascends and air enters from the lower portion and exhausts from the upper portion when the elevator descends are achieved, and the air exchange quality in the elevator is improved.

The present invention relates to a composite microbial deodorant having codonopsis pilosula, osmanthus fragrans, borneol and anabaena, wherein the composite microbial deodorant comprises a microbial agent, a plant extract, an algae extract and water, the microbial agent comprises, by mass, 20-40% of Lactobacillus plantarum, 20-40% of beer yeast, 1-5% of improved denitrification bacteria, 1-5% of improved nitrifying bacteria, and 1-5% of azotobacter chroococcum, the plant extract comprises, by mass, 5-10% of a codonopsis pilosula extract, 10-20% of a osmanthus fragrans extract and 1-3% of borneol essential oil, and the algae extract is 0.5-2% by mass of an anabaena wall breaking extract. According to the present invention, the composite microbial deodorant has characteristics of low cost, high efficiency, wide application, and practicality in concrete production.

The invention discloses an integral air filtering product for removing volatile organic compounds from target gas and preparing and using methods thereof, and particularly discloses a base material ofa formaldehyde conversion catalyst for removing formaldehyde from ambient air. The base material comprises at least one porous wall. The formaldehyde conversion catalyst is positioned in pores of theporous walls of the base material. A capturing layer comprises activated carbon and is provided on at least one porous spacing wall and used for removing VOCs capable of poisoning the formaldehyde conversion catalyst from the target gas.