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US 5,133,190 AGranted
Method and apparatus for flue gas cleaning by separation and liquefaction of sulfur dioxide and carbon dioxide
OwnerFawzy T. Abdelmalekinventor
Life of this patent
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Abstract
Sulfur dioxide and carbon dioxide, emitted in flue gases are separated by gas centrifuge separators, and liquefied by gas mechanical compression and cooling means.
Claims10
A method for recovering sulfur dioxide, carbon dioxide, and cleaning flue gases emitted from power plant, comprising:
- a. Electronically treating the flue gases to neutralize its electrostatic charges and to enhance the coagulation of its molecules and particles;
- b. Exchanging sensible and latent heat of the neutralized flue gases to lower its temperature down to a temperature approaching the ambient temperature while recovering its heat energy to co-generate electric power;
- c. Separating the flue gas in a first stage, high speed gas centrifuge to a nitrogen enriched fraction, and a carbon dioxide enriched fraction, and allowing the nitrogen enriched fraction to be vented while the carbon dioxide enriched fraction is fed to a second stage gas centrifuge, for further separating into a second step of nitrogen enriched fraction, and carbon dioxide enriched fraction;
- d. Cooling the separated enriched carbon dioxide gas fraction, after each separation stage, while removing its vapor condensate, then
- e. Compressing the enriched carbon dioxide gas fraction and simultaneously cooling the compressed gas to liquefy the sulfur dioxide gas then,
- f. Allowing the sulfur dioxide gas to condense, and continuously removing the liquefied sulfur dioxide;
- g. Compressing the desulfurized enriched carbon dioxide fraction to further increase its pressure, and simultaneously cooling the compressed gas to liquefy the carbon dioxide gas, then;
- h. Allowing the carbon dioxide gas to condense and continuously removing the liquefied carbon dioxide;
- i. Allowing the light components of the flue gas to be released in a cooling tower discharge plume.
6 more elements
In combination,
- a. an electric power plant having a continuous emission of boiler flue gases with high sulfur dioxide content;
- b. a conduit for conducting the flue gas emissions;
- c. an electrostatic gas treatment to neutralize the gas molecules and particles to enhance airborne particulate removal and increase the gas molecules coagulation;
- d. a heat exchange system for absorbing heat from the flue gas to allow the flue gas cooling and condensing its vapor, and utilize the recovered heat energy to drive a gas expander to co-generate electric power;
- e. a two stage centrifuge gas separation system for separating enriched carbon dioxide gas fraction and enriched nitrogen gas fraction streams;
- f. a first stage gas compressor system downstream of the second stage separator for boosting the enriched sweep gas stream pressure;
- g. a first stage compressed gas aftercooler to cool the first stage compressed gas and to condense and liquefy sulfur dioxide gas;
- h. a moisture separator to separate the gas from the sulfur dioxide liquid;
- i. a second stage gas compressor system downstream of the first stage gas compressor system to further boost the desulfurized gas pressure;
- j. a second stage compressed gas aftercooler to cool the second stage pressurized gas and to condense and liquefy carbon dioxide gas;
- k. a moisture separator to separate the gas from the carbon dioxide liquid;
- l. a flue gas conduit and diffusing system to allow releasing the lighter gas mixture releasing the lighter gas mixture released from the centrifuge separators into the cooling tower.
9 more elements
Dependencies are inferred from the claim text.