Enhanced sorbent injection combined with natural gas reburning for a SO sub x control for coal fired boilers
Patent
·
OSTI ID:6354352
This patent describes an improvement in a process for reducing gaseous SO{sub {ital x}} content of exhaust gases from a combustion installation, by injecting an aqueous dispersion of a particulate sorbent into the combustion installation in a zone outside of the combustion region such that the aqueous dispersion is initially exposed to a temperature exceeding about 2200{degrees} F. It comprises: prior to the step of injecting the aqueous dispersion into the combustion installation, the steps of mixing substantially dry solid particulates with combustion gases from the combustion of hydrocarbon gas at a temperature in the range of about 1800{degrees}--1900{degrees} F. for 1.5--2.0 seconds to form a calcined solid sorbent capable of reacting with sulfur-containing gases; and mixing the calcined solid sorbent to form an aqueous dispersion for injection into the combustion installation; wherein the solid particulates comprise calcium carbonate, calcium hydroxide, magnesium carbonate, magnesium hydroxide or mixtures of any two or more thereof.
- Assignee:
- Acurex Corp., Mountain View, CA (USA)
- Patent Number(s):
- US 4960577; A
- Application Number:
- PPN: US s 7-152073
- OSTI ID:
- 6354352
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010900* -- Coal
Lignite
& Peat-- Environmental Aspects
03 NATURAL GAS
030800 -- Natural Gas-- Environmental Aspects
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
ADSORBENTS
AIR POLLUTION ABATEMENT
BOILERS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
COAL
COMBUSTION CONTROL
CONTROL
EMISSION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
MATERIALS
NATURAL GAS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
010900* -- Coal
Lignite
& Peat-- Environmental Aspects
03 NATURAL GAS
030800 -- Natural Gas-- Environmental Aspects
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
ADSORBENTS
AIR POLLUTION ABATEMENT
BOILERS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
COAL
COMBUSTION CONTROL
CONTROL
EMISSION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
MATERIALS
NATURAL GAS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES