Scrubbing systems and methods for coal fired combustion units
First Claim
1. A system for treatment of flue gas from a coal fired circulating fluidized bed reactor, comprising a wet scrubber operatively connected to the circulating fluidized bed reactor and configured for treating the flue gas.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods for removing toxic emissions from flue gas of coal fired combustion units can be achieved. Decreasing sulfur oxide emissions from a coal fired circulating fluidized bed reactor can include treating flue gas unit using a wet scrubber. Wet scrubbers can include gas phase scrubbers, liquid phase scrubbers, and gas-liquid phase scrubbers. Additionally, toxic emissions can be reduced from coal fired combustion units such as circulating fluidized beds or pulverized coal units. Particulates can be removed from flue gas of the coal fired combustion unit. The flue gas can then be treated with at least two consecutive wet scrubbers to produce a low sulfur flue gas. In addition to sulfur oxides, a wide variety of toxic emissions can be removed such as nitrogen oxides, carbon monoxide, arsenic, beryllium, cadmium, hydrochloric acid, chromium, cobalt, hafnium, lead, manganese, mercury, nickel, selenium, benzo(a)pyrene, and combinations thereof. Such systems and methods provide improved levels of toxic emissions over currently available technologies.
28 Citations
60 Claims
- 1. A system for treatment of flue gas from a coal fired circulating fluidized bed reactor, comprising a wet scrubber operatively connected to the circulating fluidized bed reactor and configured for treating the flue gas.
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17. A system for treatment of flue gas from a coal fired reactor, comprising:
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a) a particulate collection apparatus operatively connected to the coal fired reactor and configured to produce a low particulate flue gas;
b) a first wet scrubber operatively connected to the particulate collection apparatus and configured for scrubbing the flue gas and producing a treated flue gas; and
c) a second wet scrubber operatively connected to the first wet scrubber and configured for scrubbing the treated flue gas to produce a low sulfur oxide flue gas. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of decreasing toxic emissions from a coal fired combustion unit comprising the steps of:
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a) removing particulates from flue gas of the coal fired combustion unit to produce a low particulate flue gas;
b) treating low particulate flue gas using a first wet scrubber to produce a treated flue gas; and
c) treating the treated flue gas with a second wet scrubber to produce a low sulfur flue gas. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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- 37. A method of decreasing sulfur oxide emissions from a coal fired circulating fluidized bed reactor comprising the step of treating flue gas from the coal fired combustion unit using a first wet scrubber to produce a treated flue gas.
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47. A system for treatment of flue gas from a coal fired reactor, comprising:
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a) a particulate collection apparatus operatively connected to the coal fired reactor and configured to produce a low particulate flue gas;
b) a first dry scrubber operatively connected to the particulate collection apparatus and configured for scrubbing the flue gas and producing a treated flue gas; and
c) a second dry scrubber operatively connected to the first dry scrubber and configured for scrubbing the treated flue gas to produce a low sulfur oxide flue gas. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 60)
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55. A method of decreasing toxic emissions from a coal fired combustion unit comprising the steps of:
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a) removing particulates from flue gas of the coal fired combustion unit to produce a low particulate flue gas;
b) treating low particulate flue gas using a first dry scrubber to produce a treated flue gas; and
c) treating the treated flue gas with a second dry scrubber to produce a low sulfur flue gas. - View Dependent Claims (56, 57, 58, 59)
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Specification