30results about How to "Achieve oxidative degradation" patented technology

The invention relates to the technical field of environmental protection and aims to provide a method and a device for pre-oxidizing and absorbing NOx and SO2 in coal-fired flue gas by active molecules. The method comprises the following steps: spraying ozone into a boiler tail flue of 100-150 DEG C, and enabling the ozone and NO in the flue gas to generate oxidation reaction; dynamically regulating the injection amount of the ozone according to a molar ratio of the ozone to the nitric oxides being 1-1.5, and ensuring at least 0.5-second oxidization reaction time; feeding the flue gas subjected to the ozone oxidization treatment into a washing tower to perform absorption treatment. According to the technical scheme adopted by the invention, the flue gas desulphurization rate can be over 99%, the denitration efficiency can be over 90%, the mercury removal efficiency can be over 80%, the dechlorination and defluorination efficiency can be over 95%, and the oxidative degradation of part of the volatile organic pollutants is realized.

The invention relates to a filter-type electrochemistry air sterilization and purification device.The filter-type electrochemistry air sterilization and purification device comprises a shell, a power source, an electrolyzed water generation module and air drafting devices for driving air to flow through the electrolyzed water generation module.The power source is connected with a positive electrode connecting end and a negative electrode connecting end which are connected to the electrolyzed water generation module, the electrolyzed water generation module is installed in the shell, an air inlet and an air outlet are formed in the electrolyzed water generation module, and outside air is led into the electrolyzed water generation module by the air drafting devices through the air inlet, and is processed through the electrolyzed water generation module and discharged through the air outlet.According to the filter-type electrochemistry air sterilization and purification device, the air is led into the electrolyzed water generation module through the air inlet in the electrolyzed water generation module by the air drafting devices, is in contact with active oxygen substances generated in the electrolyzed water generation module and then is discharged from the air outlet, sterilization and purification are achieved, indoor objects, plants, persons and the like are not damaged, sterilization and purification can be carried out in the indoor movement space with persons, and the elimination efficiency of microorganisms can be 99% or above.

The invention belongs to the field of indoor gas purification, and in particular relates to a VOC gas electro-adsorption-catalytic degradation device and process. The device includes a fan, which is used to create a vacuum and introduce VOC gas into the device; the main reactor includes functional carbon materials, anodes and cathodes, and the three cooperate to form a VOC adsorption-electrocatalytic reaction zone, and VOC gas passes through the Adsorption-electrocatalytic reaction occurs in the area for degradation; humidifier is used to provide water vapor, which acts as a conductive medium for the electrocatalytic process. The device can make VOC gas be adsorbed and catalytically degraded in a short time, achieving the effect of efficiently degrading VOC gas. Moreover, the water vapor created by the humidifier provides a good medium environment for the electrocatalytic process without adding a large amount of electrolyte , to avoid frequent replacement of the electrolyte.

The process of treating waste water from refined terephthalic acid production belongs to the field of environment protecting engineering and industrial effluent treating technology. The process includes settling and filtering of the waste water, oxidizing degradation in an oxidizing tower with composite catalyst, blowing aeration treatment and the next biochemical treatment. The water solution of ClO2 as the main oxidant has concentration of 0.03 %-5 % and the thrown amount of 5 %-20 % of waste water COD concentration; and the auxiliary oxidant of O2, air and / or H2O2 has the volume ratio to the waste water of 100-110 to 1. The process of the present invention has the features of small covered area, low running cost, low chemical consumption, high treating efficiency, no waste water exhaust, closed water circulation, etc.

The invention relates to a landfill sludge treatment method. The method comprises the following steps: sampling and analyzing sludge, determining the pH value, the type of smelly pollutants, the landfill depth and the horizontal distribution of the sludge, preparing an oxidation preparation, injecting the oxidation preparation into underground sludge by virtue of in-situ mixing and stirring equipment, and simultaneously stirring the oxidation preparation and the sludge underground by virtue of an impeller stirring head of the in-situ mixing and stirring equipment; after uniform stirring, carrying out standing reaction for 3.5-5.5 hours, and putting a curing agent into sludge by using an engineering machine, and stirring continuously by using the in-situ mixing and stirring equipment; afteruniform stirring, standing for 24-48 hours, carrying out open type excavation and transfer on the solidified sludge. By sequentially carrying out in-situ treatment and excavation, the construction operability is strong, the investment cost of the equipment is low, the treatment period is short, the treatment is thorough, the secondary pollution is avoided, the problem of stink pollution in the excavation process of the sludge is solved, and meanwhile, the treatment of the sludge is realized; and the method has relatively good economic and social benefits.

The invention discloses an in-situ restoration process for low-concentration organic-polluted groundwater, which includes constructing an injection well in the groundwater pollution area, installing a well pipe in the injection well, the bottom of the well pipe is perforated, and communicates with the aquifer, and the perforated The length is greater than the longitudinal extent of the contaminated area; inject oxygen into the aquifer through the injection well, and perform aerobic control on the aquifer; after performing anaerobic control on the aquifer for 5 days or more, cycle aerobic control and anaerobic control to groundwater The degradation of organic pollutants reached the standard. The present invention artificially adjusts the dissolved oxygen content of groundwater, controls the orderly alternation of aerobic and anaerobic conditions, utilizes the inherent components such as iron minerals, organic matter and microorganisms in the aquifer, and realizes the activation of divalent iron minerals under aerobic conditions Oxygen produces hydroxyl radicals for the oxidative degradation of low-concentration organic pollutants, and microorganisms use organic carbon to regenerate ferrous minerals under anaerobic conditions.

The invention provides a reactor for gas-solid phase electro-catalytic reaction, and a method for eliminating VOCs (volatile organic contaminants) by using the reactor. The reactor comprises an anode gas chamber, a cathode gas chamber, an electrocatalytic anode, a diaphragm and an electrocatalytic cathode, wherein both of the electrocatalytic anode and the electrocatalytic cathode are air-permeable; the diaphragm is placed between the electrocatalytic anode and the electrocatalytic cathode; the disphragm, the electrocatalytic anode and the electrocatalytic cathode form an integrated body, so as to form an integrated structure; the anode gas chamber and the cathode gas chamber are independently cavities with through holes; and the integrated structure is placed between the through hole of the anode gas chamber and the through hole of the cathode gas chamber, and covers the through hole of the anode gas chamber and the through hole of the cathode gas chamber. An electrolytic tank can eliminate the indoor VOCs at room temperature, and most of the products are CO2; in addition, the electrolytic tank for eliminating the indoor VOCs is safe, convenient and small in energy consumption, and oxidative degradation of the VOCs can be realized only by 2-V additional direct-current voltage.