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US 6,787,114 B2Granted
Method and apparatus for wet type flue-gas desulfurization
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsMasakazu Onizuka, Toru Takashina
Life of this patent
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Abstract
A wet type exhaust gas desulfurization apparatus includes a liquid reservoir which reserves absorption liquid containing absorbent and sulfite, a desulfurizing system which removes sulphur dioxide from combustion exhaust gas and forms sulfite, and an air supplying and circulating device which has a reduction section and supplies air to said liquid reservoir using a negative pressure generated due to said reduction section to oxidize the sulfite.
Claims17
A wet type exhaust gas desulfurization apparatus comprising:
- a desulfurizing device which forms sulfite to remove sulphur dioxide from combustion exhaust gas;
- a liquid reservoir which reserves absorption liquid containing absorbent and said sulfite;
- and
- an air supplying and circulating device having a reduction section which forms a depressurized region in a flow of said absorption liquid, said air supplying and circulating device being configured to introduce air to the depressurized region so as to supply said air to said liquid reservoir and oxidize said sulfite,
- wherein said reduction section includes a reduction section plate having a reduction section hole and a peripheral portion surrounding the reduction section hole, and the peripheral portion is protruding toward the upstream side of the flow.
2 more elements
A wet type exhaust gas desulfurization apparatus comprising:
- a desulfurizing device which forms sulfite to remove sulphur dioxide from combustion exhaust gas;
- a liquid reservoir which reserves absorption liquid containing absorbent and said sulfite;
- and
- an air supplying and circulating device having a pipe, a nozzle, and a reduction section which forms a depressurized region in a flow of said absorption liquid and is positioned between said pipe and said nozzle, said air supplying and circulating device being configured to introduce air to the depressurized region so as to supply said air to said liquid reservoir through said pipe and said nozzle together with said absorption liquid and oxidize said sulfite,
- wherein a central axis of said nozzle is inclined with respect to a liquid surface in said liquid reservoir, and said reduction section includes a reduction section plate having a reduction section hole and a peripheral portion surrounding the reduction section hole, and the peripheral portion is protruding toward the upstream side of the flow.
2 more elements
Dependencies are inferred from the claim text.