A biofilter irrigation system comprises a cylindrical vessel having a central axis, a media bed positioned within the vessel, a spray head system positioned above the media bed, the spray head system comprising a central hub positioned at the central axis of the vessel, at least one arm extending distally from the central hub toward a wall of the vessel and configured to rotate about the central axis, and a plurality of nozzles connected to the at least one arm. The biofilter irrigation system further comprises a fluid outlet positioned below the media bed.

Method of treating gas and gas treatment device, the gas treatment device comprising: a first chamber, comprising a first inlet, a first outlet and a first energy supply system, allowing the gas to enter the first chamber through the first inlet; a second chamber comprising a second outlet and a second energy supply system; a third chamber comprising a third inlet in communication with the first outlet and the second outlet; and a fourth chamber comprising a fourth inlet and a scrubbing system containing a solvent comprising water molecules (H.sub.2O), wherein the third outlet of the third chamber is in communication with the fourth inlet of the fourth chamber.

There is an air purification system comprising, at least one housing, at least one pump configured to pump an enhanced fluid through the housing. at least one fan configured to draw air into the housing. With this embodiment, the air flow of the air is being cleaned and flows in a direction transverse to the direction of flow of the enhanced fluid. There can be at least one sensor configured to determine a level of biological impurities in the air. There can also be at least one controller configured to control a rate of movement of said at least one fan based upon a level of impurities detected by said at least one sensor.

A thermal power plant exhaust purification device, the device including a cooling substance flow channel and an exhaust flow channel; the device also includes a spacing member for spacing and exchanging heat between the cooling substance flow channel and the exhaust flow channel, the spacing member having an exhaust contact surface for collecting dust and/or mist contained in the exhaust; the cooling substance flows in the cooling substance flow channel, such that the condensate precipitated from hot exhaust uniformly adheres on the exhaust contact surface, thus forming a uniform and stable water film; on one hand, formation of the concentrated H.sub.2SO.sub.4 on a dust collecting plate is prevented, and a liquid film flows downwards under gravity, thereby cleaning the H.sub.2SO.sub.4 adhered on the dust collecting plate timely; on the other hand, the water film is very effective in intercepting droplets and capturing the dust.

The present invention relates to coal-fired power plants and flue gas emissions and more specifically, to controlling gaseous mercury emissions in the flue gas between two or more coal fired electric generating units within a contiguous power plant site to achieve environmental regulation limits for mercury emissions. This is accomplished by continuously adjusting the application rates of mercury oxidant, which is added to a coal feed to oxidize elemental mercury for improved mercury capturability and aqueous mercury precipitant (liquid), which is added to a scrubber liquor of a wet Flue Gas Desulfurization (FGD) unit to precipitate out oxidized mercury into solid form for improved capture and disposal.

A method is described for mixing gas and liquid for gravitational, physical and chemical collection of compounds or particles, based on decreasing of the compounds free mean path in a vessel, and comprising the steps of: gravitational depletion, involving abating compounds and liquid chemical solution drops with higher diameter than higher volume; physical deposition, involving the condensation of abated compounds on a wet surface of the vessel; chemical adsorption, involving chemical reaction between the abated compounds and the species in the liquid chemical solution.

A device for converting harmful waste products into environmentally friendly discharge is provided. The discharge, as a result of the waste destruction process, meets or exceeds the Environmental Protection Agency (EPA) standards. The device includes a waste disposal chamber where a crucible is positioned. The crucible is configured to retain a removable basket that is heated via induction heating. The waste residing within the removable basket is then vaporized and ionized within a vacuum to form a waste gas that is drawn through an accelerated jet of thermal plasma via vacuum suction. Once the waste gas passes through the plasma, it passes through a discharge duct where it is condensed by a heat exchanger and exhausted into the environment surrounding the device.

The present invention relates to the filtering of fumes emitted by industrial processes such as those used in iron and steel works, refineries, waste-to-energy plants and the like and in particular relates to a filtering device for fine and ultrafine dust particles and other polluting agents.

The present invention relates to the filtering of fumes emitted by industrial processes such as those used in iron and steel works, refineries, waste-to-energy plants and the like and in particular relates to a filtering device for fine and ultrafine dust particles and other polluting agents.

A degradant concentration measurement device 14 according to the invention has an electric conductivity measurement instrument 71A measuring the electric conductivity of a lean solution 16 that is an acidic gas-absorbing solution and detection means 72 obtaining the concentration of a degradant contained in a lean solution 16 from the measured electric conductivity of the lean solution 16 based on the relationship between the previously-obtained electric conductivity of the lean solution 16 and the concentration of the degradant contained in the lean solution 16.