Flue gas treatment device
AssigneeMitsubishi Hitachi Power Systems, Ltd.
InventorsNaoyuki Kamiyama, Seiji Kagawa, Toshihiro Fukuda, Tetsu Ushiku
Life of this patent
Estimating the term…
Abstract
Provided are: an NOx removal unit to remove nitrogen oxide; an air preheater on a downstream side of the NOx removal unit to recover heat; a precipitator on a downstream side of the air preheater to remove ash dust; a gas-liquid contact type desulfurization unit on a downstream side of the precipitator to remove sulfur oxide; an SO3 removing agent supply unit to supply an SO3 removing agent at a supply unit on an upstream side of the precipitator; and a wet state processing unit between the air preheater and the supply unit to supply water to a flue gas to be made into a wet state; the wet state processing unit having a stand-up portion, a partition unit and a droplet supply unit.
Claims18
1-13. (canceled)
A flue gas treatment device, comprising:
- an NOx removal unit configured to remove nitrogen oxide contained in a flue gas flowing from a boiler;
- an air preheater that is provided on a downstream side of the NOx removal unit and is configured to recover heat in a flue gas after removal of nitrogen oxide;
- a precipitator that is provided on a downstream side of the air preheater and is configured to remove ash dust contained in a flue gas after heat recovery;
- a gas-liquid contact type desulfurization unit that is provided on a downstream side of the precipitator and is configured to remove sulfur oxide contained in a flue gas after precipitation;
- an SO3 removing agent supply unit configured to supply an SO3 removing agent to a flue gas inside a flue gas duct at a supply unit located on an upstream side of the precipitator;
- and
- a wet state processing unit that is provided between the air preheater and the supply unit that supplies the SO3 removing agent and is configured to supply-water to a flue gas to be made into a wet state inside the flue gas duct,
- wherein the wet state processing unit includes a stand-up portion standing in a direction orthogonal to the flue gas duct configured to exhaust the flue gas, a partition unit configured to partition the inside of the stand-up portion into a gas ascending passage and a gas descending passage, and a droplet supply unit configured to supply droplets onto the gas descending passage partitioned by the partition unit.
A flue gas treatment device, comprising:
- an NOx removal unit configured to remove nitrogen oxide contained in a flue gas flowing from a boiler;
- an air preheater that is provided on a downstream side of the NOx removal unit and is configured to recover heat in a flue gas after removal of nitrogen oxide;
- a gas-gas heater that is provided on a downstream side of the air preheater and is configured to perform heat exchange of heat of a flue gas after heat recovery;
- a precipitator that is provided on a downstream side of the gas-gas heater and is configured to remove ash dust contained in a flue gas after heat exchange;
- a gas-liquid contact type desulfurization unit that is provided on a downstream side of the precipitator and is configured to remove sulfur oxide contained in a flue gas after precipitation;
- an SO3 removing agent supply unit configured to supply an SO3 removing agent in a flue gas inside a flue gas duct at a supply unit located on a downstream side of the air preheater and located on an upstream side of the gas-gas heater;
- and
- a wet state processing unit that is provided between the gas-gas heater and the supply unit that supplies the SO3 removing agent and is configured to supply water to a flue gas to be made into a wet state inside the flue gas duct,
- wherein the wet state processing unit includes a stand-up portion standing in a direction orthogonal to the flue gas duct configured to exhaust the flue gas, a partition unit configured to partition the inside of the stand-up portion into a gas ascending passage and a gas descending passage, and a droplet supply unit configured to supply droplets onto the gas descending passage partitioned by the partition unit.
Dependencies are inferred from the claim text.