Provided is an air pollution control system including: a denitration apparatus; an air heater; a precipitator; a desulfurization apparatus; a dehydrator; a spray drying apparatus provided with a spray unit that is configured to spray dehydrated filtrate as desulfurization wastewater supplied from the dehydrator; a flue gas introduction line through which a branch gas branched from the flue gas is introduced to the spray drying apparatus; a flue gas supply line through which flue gas returns to a main flue gas duct, the flue gas being obtained after the dehydrated filtrate is dried by the spray drying apparatus; and a powder supply apparatus that is configured to supply a powder to the flue gas introduction line.

A device for capture of acid gas of combustion fumes of a thermal power plant, including: absorption means (10) of the gas by capture fluid, a regenerator (1) where the capture fluid and a regeneration fluid steam are put in contact, introduction means (11) of the regeneration fluid in the regenerator, condensation means (2, 3, 4), at the head of said regenerator, separation means (6) of liquid phase of the regeneration fluid and gaseous phase rich in acid gas,
Wherein: the regeneration fluid steam introduced is superheated, the regenerator (1) includes means limiting the contact time to substantially maintain the flow rate of regeneration fluid steam, the condensation means (2, 3, 4) are in thermal exchange with first evaporation means of working fluid, and first reintroduction means (13) of steam obtained in a turbine (14).

Methods and apparatus to treat exhaust streams are disclosed. A disclosed example treatment device to treat a carbon monoxide-containing exhaust stream includes a conversion device to convert carbon monoxide to carbon dioxide, where the energy released in the conversion is used to supply thermal energy and/or electrical energy. The example treatment device also includes a cleaning device to clean the exhaust gas stream to be provided to the conversion device, where the cleaning device is provided upstream in an inlet of the conversion device.

A carbon dioxide separation apparatus comprises an absorption apparatus and a desorption apparatus, wherein the absorption apparatus comprises a gas inlet for the gas to be purified and a gas outlet for the purified gas, wherein the absorption apparatus comprises an absorption solvent inlet and a solution outlet, wherein the desorption apparatus comprises at least one first solution inlet, an absorption solvent outlet, a hot solvent inlet and a carbon dioxide outlet, wherein the solution outlet is connected to the first solution inlet via a first solution conduit, wherein the first solution conduit comprises a first heat exchanger, wherein the absorption solvent outlet is connected to the absorption solvent inlet via an absorption solvent conduit, wherein the absorption solvent conduit comprises the first heat exchanger so that the heat of the solvent stream is transferred to the solution stream, wherein the absorption solvent conduit comprises a branch to a hot solvent conduit, wherein the hot solvent conduit is connected to the hot solvent inlet, wherein the hot solvent conduit comprises a second heat exchanger.

A facility for cooling a gas flow containing CO2, water and at least one other component includes a scrubbing tower, a pipe for conveying the gas flow at a first temperature to the bottom of the tower, a pipe for conveying water at a second temperature, which is lower than the first temperature, to a first level at the top of the scrubbing tower, a pump, a pipe being connected to the tank of the column for removing tank water and to the pump for pressurizing the water removed from the tank, and means for withdrawing water downstream of the pump, these means being connected to the tower thereby conveying the pressurized water at a third temperature to an indirect heat exchanger located in the tower at the second level above the first level, the third temperature being higher than the second temperature, but lower than the first temperature.

The invention provides a system for removing an acid gas from syngas with enhanced heat recovery, the system including an acid gas absorber containing a solvent and having an inlet positioned to receive a syngas stream, the acid gas absorber producing an acid gas enriched solvent effluent; a first heat exchanger positioned to exchange heat between the syngas stream upstream of the acid gas absorber and the acid gas enriched solvent effluent; and an acid gas stripper positioned to receive the acid gas enriched solvent effluent from the first heat exchanger, the acid gas stripper producing a lean solvent effluent having reduced acid gas content. The invention also provides a method for removing an acid gas from syngas with enhanced heat recovery, which involves heating an acid gas enriched solvent effluent through heat exchange with a syngas stream upstream of an acid gas absorber.

A pressurizing device for compressing a fluid includes a housing, a fluid duct, one or more pressurizing stages each comprising a pressurizing element, a device for forcing an airflow in an air channel through the housing and a liquid-cooling circuit. The liquid-cooling circuit includes a pump for circulating the liquid; liquid-fluid heat exchangers downstream of each pressurizing element; a liquid-liquid heat exchanger for recovery of energy; and a liquid-air heat exchanger located in the air channel. A fluid-air heat-exchanger is provided in the air channel in a fluid duct outlet part of the fluid duct.

A system and method for treatment of a medium is disclosed. The system includes a plurality of separator zones and a plurality of heat transfer zones. Each of the separator zone and the heat transfer zone among the plurality of separator zones and heat transfer zones respectively, are disposed alternatively in a flow duct. Further, each separator zone includes an injector device for injecting a sorbent into the corresponding separator zone. Within the corresponding separator zone, the injected sorbent is reacted with a gaseous medium flowing in the flow duct, so as to generate a reacted gaseous medium and a reacted sorbent. Further, each heat transfer zone exchanges heat between the reacted gaseous medium fed from the corresponding separator zone and a heat transfer medium.

A gas treatment plant (3) for treating an industrial waste gas comprising carbon dioxide comprises an oxyfuel boiler (100) and a pipe (109; 122; 180) arranged for forwarding the industrial waste gas to the oxyfuel boiler (100) and injecting the industrial waste gas into the oxyfuel boiler (100) to participate in the combustion process occurring in the boiler (100) to cause oxidation of at least a portion of the content of at least one oxidizable substance of the industrial waste gas. The gas treatment plant (3) further comprises a gas cleaning system (108), and a pipe (126) for forwarding a carbon dioxide rich flue gas generated in the boiler (100) to the gas cleaning system (108) for being cleaned therein, such that an at least partly cleaned carbon dioxide rich flue gas is formed.

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.