An apparatus for treating gaseous pollutants includes a gas inlet part, a first treatment unit, a second treatment unit and a non-mechanical flow-guiding device. The gas inlet part includes a gas inlet chamber and at least one guide pipe. The guide pipe communicates with the gas inlet chamber and guides an effluent stream from a semiconductor process to the gas inlet chamber. The first treatment unit is coupled to a bottom end of the gas inlet part and is configured to abate the effluent stream. The non-mechanical flow-guiding device is coupled to the first treatment unit. The flow-guiding device is configured to guide the effluent stream to move toward an opening. The second treatment unit is coupled to the flow-guiding device via the opening, receives the effluent stream from the first treatment unit and further abates the effluent stream.

To provide an aldehyde scavenger and a method for removing aldehydes by using the same, for quickly and continuously capturing aldehydes. An aldehyde scavenger comprising at least one O-substituted hydroxylamine or at least one chemically acceptable salt thereof, is used against an aldehyde generation source.

A desulfurization and denitration method includes adding an aqueous solution of a chlorate, an aqueous solution of a peroxide, and an aqueous solution of sulfuric acid to a chlorine dioxide generator to obtain gaseous chlorine dioxide, and mixing the gaseous chlorine dioxide with air to obtain a mixed gas. The gaseous chlorine dioxide is 4-10 vol % of the mixed gas. The method includes letting the mixed gas come into contact with a flue gas to obtain an oxidized flue gas. A molar ratio of the gaseous chlorine dioxide in the mixed gas to nitric oxide in the flue gas is 1-1.8. The final step includes passing the oxidized flue gas to the desulfurization and denitration tower and mixing the oxidized flue gas with a spray of an alkaline absorbent dry powder, and spraying water into the desulfurization and denitration tower to obtain a desulfurized and denitrated flue gas.

An integrated process for carbon dioxide capture, sequestration and utilization, includes a) providing an aqueous slurry with a particulate solid including an activated magnesium silicate mineral; b) contacting a CO.sub.2-containing gas stream with the aqueous slurry to provide a slurry comprising a magnesium ion enriched carbonated aqueous liquid and a magnesium depleted solid residue; c) subjecting at least part of the magnesium depleted solid residue to a particle size classification process that separates the magnesium depleted solid residue into a fine particle size fraction and a coarse particle size fraction; d) subjecting the coarse particle size fraction to a particle size reduction process; e) providing an aqueous slurry comprising particle size reduced fraction from step d) and repeating step b), wherein this step e) does not include using fine particle size fraction from step c); and f) precipitating magnesium carbonate from magnesium ions dissolved in b) and e).

The invention relates to a reactor for cleaning flue gases by a dry or quasi-dry sorption process, comprising a flue gas inlet (1) at the bottom of the reactor, an outlet (2) at the top of the reactor, a dry sorbent injection system (3) with at least one dry sorbent outlet (4) for injecting dry sorbent into the reactor, the at least one dry sorbent outlet (4) being arranged between the flue gas inlet (1) and the outlet (2).

An integrated process for carbon dioxide capture, sequestration and utilization, includes a) providing an aqueous slurry with a particulate solid including an activated magnesium silicate mineral; b) contacting a CO.sub.2-containing gas stream with the aqueous slurry to provide a slurry comprising a magnesium ion enriched carbonated aqueous liquid and a magnesium depleted solid residue; c) subjecting at least part of the magnesium depleted solid residue to a particle size classification process that separates the magnesium depleted solid residue into a fine particle size fraction and a coarse particle size fraction; d) subjecting the coarse particle size fraction to a particle size reduction process; e) providing an aqueous slurry comprising particle size reduced fraction from step d) and repeating step b), wherein this step e) does not include using fine particle size fraction from step c); and f) precipitating magnesium carbonate from magnesium ions dissolved in b) and e).

The invention relates to the technical field of the treatment of exhaust gases containing sulfur oxides, especially exhaust gases from technical combustion plants, the so-called flue gases, or exhaust gases from technical processes, such as steel production (e.g. blast furnace gases, etc.) Especially, the invention relates to a method for the treatment of exhaust gases containing sulfur oxides, in particular from technical combustion plants, such as flue gases, or from technical processes, for the purpose of removing and/or separating off the sulfur oxides or for the purpose of reducing the sulfur oxide content, as well as a system for carrying out the method.

An injection lance assembly for creating a higher degree of turbulence and dispersion of a treating agent into a fluid stream.

Device (10) for injecting powders into a furnace pipe (500), comprising a chamber (230) connected to a peripheral pipe (220) and, on the other hand, to the said furnace pipe via the said peripheral pipe (220), which comprises a first part (221) of diameter DP1, and a second part (222) of diameter DP2, having a downstream end (222a) and intended to be in communication with the furnace pipe, and a powder conveying pipe (120) which has a diameter DT and a downstream end (121), characterized in that the second part of the peripheral pipe has a length Lthe diameter (DP2) of the second part of the peripheral pipe, and in that the diameter (DT) and the diameter (DP2) are connected by the relationship 0<DP2DT< DT.

A method and a device intended to purify pollutants from an exhaust gas flow of an internal combustion engine operated with sulphur containing fuel, in particular of a ship internal combustion engine operated with heavy fuel oil, are provided. Exhaust gas flow is in contact with a solid adsorption agent of the adsorber in a first step and binding in particular acid pollutants, which comprise sulphur dioxide and sulphur trioxide. The exhaust gas flow is then guided by a second stage of the adsorber realising fine purification of the exhaust gas flow. The adsorption agent of the second stage is used in the first stage as an adsorption agent.