Abstract:
A water treatment system of the present invention for effluent generated in a plant facility includes: a flue gas treatment system 18 that performs treatment of boiler flue gas 12 from a boiler 11; and a spray drying device 23 that includes a spraying unit, which sprays effluent 22 generated, for example, in a cooler 21 of the plant facility, and that performs spray drying using part 12a of the boiler flue gas 12. The water treatment system draws the effluent 22 is discharged into the spray drying device 23 so as to dry the sprayed liquid by the part 12a of the flue gas 12. It is thus not necessary to separately perform treatment of the effluent 22 in an industrial effluent treatment facility and it is possible to eliminate the need of draining the effluent 22 generated in the plant.
Abstract:
Provided is a method of operating a flue gas desulfurization apparatus, in which gypsum slurry containing gypsum, which is obtained by bringing sulfur oxide contained in flue gas discharged from a combustion device including a boiler into contact with an absorbing solution composed of lime slurry in an absorption tower 1 and then subjecting the same to oxidation, is withdrawn from the absorption tower 1, and said gypsum slurry is supplied into a gypsum slurry tank 6 for supplying the gypsum slurry into dehydration equipment by using a pump 5 or is circulated to the absorption tower 1. In order to reduce the capacity of the pump 5 and thereby conserve pump power, the gypsum slurry is switched to being supplied into the gypsum slurry tank 6 or being circulated to the absorption tower 1 depending on the solid content concentration of the gypsum slurry withdrawn from the absorption tower 1.
Abstract:
A process for treating a sulfurous fluid to form gypsum and magnesium carbonate, whereby the sulfurous fluid is scrubbed with a sequestrating agent to yield a scrubbed fluid, gypsum and magnesium sulfate. The flue gas desulfurized gypsum is isolated from the magnesium sulfate solution by filtration or centrifugation. The magnesium sulfate is reacted with a carbonate salt to produce a magnesium carbonate whereby the reaction conditions are controlled to control the properties of the magnesium carbonate produced.
Abstract:
Method and system for removal of soot, ash and heavy metals, and optionally additionally NOx and SOx being present in exhaust gas from an engine operated on heavy fuel oil.
Abstract:
In order to create an energy-efficient treatment device for treating a exhaust stream containing carbon monoxide, the treatment device comprises the following: a conversion device (140) for converting carbon monoxide into carbon dioxide, the energy released in said conversion process being used for supplying a thermal energy source and/or electricity; a purification device (124) for purifying the exhaust stream to be fed to the conversion device.
Abstract:
Provided is a method of operating a flue gas desulfurization apparatus, in which gypsum slurry containing gypsum, which is obtained by bringing sulfur oxide contained in flue gas discharged from a combustion device including a boiler into contact with an absorbing solution composed of lime slurry in an absorption tower 1 and then subjecting the same to oxidation, is withdrawn from the absorption tower 1, and said gypsum slurry is supplied into a gypsum slurry tank 6 for supplying the gypsum slurry into dehydration equipment by using a pump 5 or is circulated to the absorption tower 1. In order to reduce the capacity of the pump 5 and thereby conserve pump power, the gypsum slurry is switched to being supplied into the gypsum slurry tank 6 or being circulated to the absorption tower 1 depending on the solid content concentration of the gypsum slurry withdrawn from the absorption tower 1.
Abstract:
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.
Abstract:
Den Gegenstand dieser Erfindung bildet ein Verfahren zur Entfernung von Quecksilber aus Wäschersuspensionen (1), die bei einer nassen Rauchgaswäsche anfallen. Die gipshaltige Suspension (1) wird mittels zumindest eines Hydrozyklons (11) eingedickt, wobei der Oberlauf (2, 4) des Hydrozyklons (11) zumindest einem Abwasserzyklon (12) zur Feststoffrückgewinnung zugeführt wird und wobei der Oberlauf (5) des Abwasserzyklons (12) anschließend in einer Abwasserreinigungsanlage (13) behandelt wird. Erfindungsgemäß wird die Quecksilberkonzentration im Oberlauf (5) des Abwasserzyklons (12) erhöht und nur der aufkonzentrierte Abwasserstrom 7 der Abwasserreinigungsanlage 13 zugeführt.
Abstract:
The present invention is a removal system for mercury in the flue gas configured to remove Hg contained in a flue gas flowing from a boiler, and includes: a heat exchanger (AH) 18 configured to execute heat exchange for a flue gas 12 flowing from a boiler 11; a precipitator 19 configured to remove soot dust in the flue gas 12; a wet SOx removal unit 21 configured to remove mercury oxide Hg 2+ in the flue gas by alkali absorbent and desulfurize sulfur oxide in the flue gas; and an HBr compound supply unit 50 configured to supply HBr, namely, a Br compound into a flue gas duct 13 configured to discharge a flue gas from a boiler outlet. Further, enrichment of bromine contained in the alkali absorbent inside the wet SOx removal unit 21 is set to predetermined enrichment or higher. With this configuration, mercury in the flue gas is stabilized in an ionic state of Hg 2+ in gypsum slurry solution discharged from the wet SOx removal unit 21.
Abstract:
A method of using condensed water produced in a desulfurization apparatus includes the steps of: bringing a gas to be treated, containing a sulfur dioxide and a desulfurization absorption liquid, into contact with each other to absorb and eliminate the sulfur dioxide from the gas to be treated; cooling a desulfurized gas obtained by the elimination of the sulfur dioxide to produce condensed water from the desulfurized gas; and washing the desulfurization apparatus with the condensed water. In the step of washing the desulfurization apparatus, an inlet for introducing the gas to be treated into the desulfurization apparatus may be washed with the condensed water, and a mist eliminator for eliminating the desulfurization absorption liquid accompanying the desulfurized gas from the gas may be washed with the condensed water.