Liquid blowdown elimination system
First Claim
Patent Images
1. In an incinerator system in which a flue gas stream is subjected to a wet scrubber system or the like to recover particulate matter and/or acid gases contained in a main flue gas stream and in which is produced a liquid bottom stream and an exhaust overhead flue gas stream, the improvement comprising the steps of:
- (a) removing a flue gas slipstream from the main flue gas stream;
(b) combining the flue gas slipstream with a liquid blowdown stream to evaporate the liquid constituent of the liquid blowdown stream and produce a dry effluent slipstream;
(c) removing residual particulates from the dry effluent slipstream to produce a substantially solids-free flue gas slipstream; and
(d) exhausting the substantially solids-free flue gas slipstream.
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Abstract
An improved process for eliminating the liquid blowdown stream from the wet flue gas scrubbing equipment of an incinerator system. The liquid blowdown stream from the main wet scrubbing system is mixed with a hot flue gas slipstream. The water is evaporated and the residual solids are removed, thereby producing a dry waste stream for disposal and a solids-free flue gas slipstream for exhaust.
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Citations
24 Claims
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1. In an incinerator system in which a flue gas stream is subjected to a wet scrubber system or the like to recover particulate matter and/or acid gases contained in a main flue gas stream and in which is produced a liquid bottom stream and an exhaust overhead flue gas stream, the improvement comprising the steps of:
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(a) removing a flue gas slipstream from the main flue gas stream; (b) combining the flue gas slipstream with a liquid blowdown stream to evaporate the liquid constituent of the liquid blowdown stream and produce a dry effluent slipstream; (c) removing residual particulates from the dry effluent slipstream to produce a substantially solids-free flue gas slipstream; and (d) exhausting the substantially solids-free flue gas slipstream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. In an incinerator system wherein a quench liquid is combined with a main flue gas stream in a scrubber operation to recover solids contained in the main flue gas stream and in which a liquid blowdown stream and an exhaust overhead flue gas stream are produced, the improvement comprising a system for eliminating or minimizing the liquid blowdown stream which comprises:
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means for removing a flue gas slipstream from the main flue gas stream; means for combining the flue gas slipstream with the liquid blowdown stream to evaporate the scrubber liquid from the liquid blowdown stream and thereby produce a dry effluent slipstream; means for removing residual particulates from the dry effluent stream to produce a substantially solids-free flue gas slipstream; and means for exhausting the substantially solids-free flue gas slipstream. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. In an incinerator system in which a main flue gas stream contains particulates or acid gases, the improvement adapted to eliminate or minimize liquid blowdown and comprising the steps of:
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(a) removing a flue gas slipstream from the main flue gas stream; (b) scrubbing the remaining flue gas with a quench liquid to produce a liquid bottom stream having a liquid blowdown stream and an exhaust overhead flue gas stream; (c) combining the flue gas slipstream with the liquid blowdown stream to evaporate the liquid from the liquid blowdown stream to produce a dry effluent slipstream; (d) removing residual particulates from the dry effluent slip stream to produce a substantially solids-free flue gas slipstream; and (e) exhausting the substantially solids-free flue gas slipstream. - View Dependent Claims (23, 24)
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Specification