Provided is a device that uses ozone, hydrogen peroxide, and hydroxyl radicals to sterilize, detoxify and purify indoor air, while simultaneously removing radon gas. The device is provided with a condensing unit (10) having a Peltier structure, and further provided with a device (2) that discharges electricity and generates ozone. The device further has an ultraviolet lamp (9) and a titanium dioxide coating for creating a titanium dioxide physical environment. The device is also provided with generation boxes (3, 5). Ultrasonic waves are used to electrolyze a liquid, such as water, hydrogen peroxide or oxygen, in the generation boxes (3, 5), so as to further generate hydroxyl radicals.

Disclosed are a system and a method for desulfurization and denitrification of an alumina calcination flue gas, and a use. The system comprises an ozone generator, a red mud pre-impregnation slurry scrubbing tower, and a red mud pre-impregnation tank and a red mud pre-impregnation clear liquid scrubbing tower. NO.sub.x in a flue gas is oxidized into a high valence oxynitride by ozone, and with the red mud as an absorbent, the synergistic absorption of SO.sub.2 and NO.sub.x in the flue gas is achieved, while the dealkalization of the red mud is achieved. By means of the synergistic catalytic oxidation of metal ions such as Fe.sup.3+ in a red mud slurry and ozone, the synergistic absorption of sulfur and oxynitride is prompted; and the use of a structure of staged absorption in two towers overcomes the problem of the difficulty in absorbing NO.sub.2 with a low O.sub.3/NO.sub.x molar ratio.

An air sterilizing device, comprising: a housing (100), forming an air flow path thereon; an ozone generating unit (200), generating ozone particles to be supplied to the air flow path; a filter cartridge (300), receiving ozone generated by the ozone generating unit (200) to discharge bubbles comprising ozone and hydroxyl radicals; an ultrasonic generating unit (400), connected to the filter cartridge (300) to generate ultrasonic waves; an air supply fan (500), configured to supply air to the air flow path of the housing (100); and a power supply unit, configured to supply power for driving the ozone generating unit (200), the ultrasonic generating unit (400), and the air supply fan (500).

Some embodiments of the present disclosure relate to a method of regenerating at least one filter medium comprising: providing at least one filter medium, wherein the at least one filter medium comprises: at least one catalyst material; and ammonium bisulfate (ABS) deposits, ammonium sulfate (AS) deposits, or any combination thereof; flowing a flue gas stream transverse to a cross-section of a filter medium, such that the flue gas stream passes through the cross section of the at least one filter medium, wherein the flue gas stream comprises: NOx compounds comprising: Nitric Oxide (NO), and Nitrogen Dioxide (NO.sub.2); and increasing an NOx removal efficiency of the at least one filter medium after removal of deposits.

An air purification device includes a reactor having a hollow shape and extending in one direction, a discharge plasma generator comprising a first electrode disposed on an outer wall of the reactor and a second electrode disposed inside the reactor, where the discharge plasma generator is configured to generate a discharge plasma in a discharge region, a plurality of dielectric particles disposed on a packed-bed of the reactor, a liquid supplier which supplies a liquid into the reactor, and a liquid recoverer which recovers the liquid discharged from the reactor.

A disinfection system includes at least one ozone generator; at least one ozone concentration level detector; programmable timer; at least one presence detector; at least one main system process management tool; at least one intermediate system process management tool. This invention aims not only to disinfect the air by removing unpleasant odour, but also to disinfect wastewater, premises and facilities by adjusting ozone concentration. Thus, not only the consequence of bad odour, which appears due to bacteria, protozoa, moulds and other fungi, but also the cause for occurrence of such bad odour is eliminated by exterminating viruses, bacteria, fungi, mould and all the main biogases within the disinfected environment. Modifications of this invention allow adjusting ozone concentration in order to disinfect premises and environment by avoiding possible hazardous ozone impact on people, working in the environments to be disinfected or residing near to such environments.

Disclosed are a system and a method for desulfurization and denitrification of an alumina calcination flue gas, and a use. The system comprises an ozone generator (1), a red mud pre-impregnation slurry scrubbing tower (3), and a red mud pre-impregnation tank (5) and a red mud pre-impregnation clear liquid scrubbing tower (10). NO.sub.x in a flue gas is oxidized into a high valence oxynitride by ozone, and with the red mud as an absorbent, the synergistic absorption of SO.sub.2 and NO.sub.x in the flue gas is achieved, while the dealkalization of the red mud is achieved. By means of the synergistic catalytic oxidation of metal ions such as Fe.sup.3+ in a red mud slurry and ozone, the synergistic absorption of sulfur and oxynitride is prompted and the material consumption of the subsequent desulfurization and denitrification is reduced; and the use of a structure of staged absorption in two towers overcomes the problem of the difficulty in absorbing NO.sub.2 with a low O.sub.3/NO.sub.x molar ratio by enhancing absorption with sodium alkali in a second stage tower, while decreasing the consumption of and risk of escape of the ozone, wherein same has the advantages of a high purification efficiency and a low operation cost, and has a stronger applicability to the alumina calcination flue gas.

A built-in apparatus and method for treating air including a housing with an air inlet and an air outlet. An air mover positioned near the air outlet is configured to draw the air through the air inlet. The housing encloses an air treatment zone, such as including an oxidizing zone, and an ozone removal zone positioned downstream of the air treatment zone and oxidizing zone. The air treatment zone includes UV light and/or ozone that partially oxidizes the chemical contaminants in the air treatment zone. A catalyst in the oxidizing zone oxidizes elements within the air treatment zone. The ozone removal zone includes a second, different catalyst material. A UV bulb that may or may not generate ozone is positioned within or downstream of the first and/or second catalyst materials to assist catalyst oxidation and/or self-clean the apparatus.

A cleaning device includes a housing having a first end defining an inlet and an opposing second end defining an outlet. The housing defines an internal cavity. The housing has a first portion, a second portion, and an intermediate portion. The first portion defines a first chamber of the internal cavity that is connected to the inlet. The first portion has a first width. The second portion defines a second chamber of the internal cavity that is connected to the outlet. The second portion has a second width greater than the first width. The intermediate portion extends between the first portion and the second portion. The intermediate portion defines an intermediate chamber. The intermediate portion has a linear profile or a non-linear profile. The cleaning device further includes an air driver positioned within the first chamber, an ozone generator positioned within the intermediate portion, and a catalyst positioned within the second chamber.

The present application relates to a process for the reduction of NOx from a gaseous effluent generated in the production of fertilizer comprising the acid digestion of phosphate ore in the presence of urea, wherein said gaseous effluent generated has a NOx composition of 70 to 100 mole % NO.sub.2 and 0 to 30 mole % NO, comprising the steps of: a) contacting said gaseous effluent for 0.5 to 15 seconds with ozone, thereby providing a resultant gas mixture wherein NO and NO.sub.2 present in the NOx are oxidized to higher nitrogen oxides; and; b) removing higher nitrogen oxides from said resultant gas mixture; wherein urea is present during said acid digestion of phosphate ore in an amount of 0.25 wt % or less based on the weight of said phosphate ore; and; ozone is added to said gaseous effluent in an ozone/NOx ratio ranging between 0.5 and 1.4.