The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for reducing and/or eliminating various liquid discharges from one or more emission control equipment devices (e.g., one or more wet flue gas desulfurization (WFGD) units). In another embodiment, the method and apparatus of the present invention is designed to reduce and/or eliminate the amount of liquid waste that is discharged from a WFGD unit by subjecting the WFGD liquid waste to one or more drying processes, one or more spray dryer (or spray dry) absorber processes, and/or one or more spray dryer (or spray dry) evaporation processes.

The present invention relates to a process for concurrently removing CO.sub.2 and SO.sub.2 from flue gas produced by a combustion process, comprising: (a) performing a combustion process by combusting a fuel and air in a combustion apparatus, thereby creating an exhaust stream comprising CO.sub.2 and SO.sub.2; (b) compressing the exhaust stream in a first compression step, thereby producing a first compressed gas stream; (c) providing a first membrane having a feed side and a permeate side, and being selectively permeable to CO.sub.2 and SO.sub.2 over nitrogen and to CO.sub.2 and SO.sub.2 over oxygen; (d) passing at least a portion of the first compressed gas stream across the feed side; (e) withdrawing from the feed side a CO.sub.2- and SO.sub.2-depleted residue stream; (f) withdrawing from the permeate side at a lower pressure than the first compressed gas stream, a first permeate stream enriched in CO.sub.2 and SO.sub.2; (g) passing the first permeate stream to a separation process that produces a stream enriched in CO.sub.2 and a stream enriched in SO.sub.2.

A device for separating carbon dioxide from a gas stream, in particular from a flue gas stream, includes an absorber for separating the carbon dioxide from the gas stream by means of a washing medium, a desorber which is fludically connected to the absorber to release the absorbed carbon dioxide from the washing medium, a gas cooler which is fludically connected upstream of the absorber to cool the gas stream, and a processing unit which is connected downstream of the gas cooler and which is equipped and designed to clean water from the gas cooler. A method separates carbon dioxide from a gas stream.

The present application relates to a spray tower for cleaning the exhaust gas from marine engines, wherein the spray tower, in installed position, is vertically positioned and comprises a central exhaust gas pipe for introducing exhaust gas into the spray tower through an exhaust gas inlet positioned at a proximal end of the central exhaust gas pipe, the central exhaust gas pipe being positioned at a bottom end of the spray tower, an exhaust gas outlet at a top end of the spray tower for withdrawing purified exhaust gas from the spray tower, one or more spray devices for providing scrubber liquid within the spray tower counter-current to the general exhaust gas flow, and at least two engine exhaust gas pipes being in fluid connection with the distal end of the central exhaust gas pipe. Furthermore, a method for reducing the amount of SOx in exhaust gas is described.

An exhaust gas processing system having excellent durability and good desulfurization and denitration efficiency is provided to efficiently recover carbon dioxide with high purity and reduced processing costs. The exhaust gas processing system has: a desulfurization unit removing sulfur oxides from the exhaust gas by the limestone-gypsum method; a denitration unit arranged downstream of the desulfurization unit to remove nitrogen oxides from the exhaust gas; a carbon dioxide recovery arranged downstream of the denitration unit to recover carbon dioxide from the exhaust gas; and an oxygen supply unit supplying to the desulfurization unit with a faction of the recovered gas from the carbon dioxide recovery unit as oxygen source. An analyzer is used to monitor the purity and recovery ratio of the carbon dioxide recovered, and the supplied ratio of recovered gas is adjusted, based on the monitored purity and recovery ratio.

A system for treating engine exhaust gas, which engine exhaust gas has a temperature of between T1 and T2, comprises a SCR reactor for converting NOx in a medium containing the engine exhaust gas into N2 and H2O. The SCR reactor has an inlet for receiving the medium and an outlet for outputting the NOx reduced medium. A first boiler unit has an outlet for outputting boiler exhaust gas (temperature greater than T3, T3>T1) from the first boiler unit. A mixing unit mixes the engine exhaust gas with the boiler exhaust gas to produce the medium. The mixing unit has a first inlet communicating with the engine for receiving the engine exhaust gas, a second inlet communicating with the outlet of the first boiler unit for receiving the boiler exhaust gas and an outlet for outputting the medium. The mixing unit outlet communicates with the inlet of the SCR reactor.

The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for: (i) reducing halogen levels necessary to affect gas-phase mercury control; (ii) reducing or preventing the poisoning and/or contamination of an SCR catalyst; and/or (iii) controlling various emissions. In still another embodiment, the present invention relates to a method and apparatus for: (A) simultaneously reducing halogen levels necessary to affect gas-phase mercury control while achieving a reduction in the emission of mercury; and/or (B) reducing the amount of selenium contained in and/or emitted by one or more pieces of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.).

The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for capturing, oxidizing, lowering the concentration and/or level of, and/or eliminating mercury present in any flue gas and/or combustion gas stream. In one embodiment, the method and/or apparatus of the present invention is applied to boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices that have connected thereto at least one type of flue gas, or combustion gas, scrubber device (i.e., a wet scrubber or a dry scrubber).

A flue gas condensation water extraction system includes a flue gas condensation-end system and a flue gas refrigeration source-end system. The flue gas condensation-end system includes a desulfurization absorption tower, a flue gas purification and condensation tower, and a condensed water storage tank. The flue gas purification and condensation tower is arranged above the desulfurization absorption tower. A flue gas outlet, a water inlet, and a water outlet are provided on the flue gas purification and condensation tower. The flue gas refrigeration source-end system includes a cooling tower. The water outlet is connected to the condensed water storage tank via a condensed water downcomer. The water inlet is connected to the cooling tower via a circulating water supply pipe. A condensation circulation water pump is provided on the circulating water supply pipe. The cooling tower is connected to the condensed water storage tank via a circulating water return pipe.

A plant for the absorption of individual components, such as pollutants or recyclable materials, in gases, in which an absorption solution is brought into contact with the gas in an absorption chamber, where the absorption solution is fed into the absorption chamber through spray nozzles and the gas can be fed into the absorption chamber from below through a vertical inlet duct, where the inlet duct is covered by a roof structure. The roof structure is made up of a large number of lamellae placed one on top of one another and with spaces in between.