CONDITIONING SYSTEM AND METHOD FOR USE IN THE MEASUREMENT OF MERCURY IN GASEOUS EMISSIONS
First Claim
1. A process for pyrolyzing mercury into gaseous elemental form comprising the steps of:
- a) receiving mercury-containing gas to be passed through a thermal pyrolysis unit, wherein the thermal pyrolysis unit contains pyrolyzer material comprising silicon carbide; and
a) converting the mercury-containing gas into pyrolyzed gas by passing the mercury-containing gas through the pyrolyzer material.
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Accused Products
Abstract
Embodiments of the invention relate generally to systems used to measure mercury in gaseous emissions. In one aspect, the invention is directed to the use of silicon carbide as material for a thermal pyrolysis unit. In another aspect, at least one of silicon nitride, silicon boride, and/or boron nitride is used as material for a thermal pyrolysis unit. In another aspect, the invention is directed to an improved pyrolyzer design, in which a thermal pyrolysis unit comprises a tailpiece that allows water to be injected at the heated exit of the thermal pyrolysis unit. In another aspect, the invention is directed to the use of a coalescing filter in a scrubbing unit. In another aspect, the invention is directed to the use of a hydrophobic filter element in a scrubbing unit. One or more of these elements may be used in a conditioning module of a continuous emissions monitoring system, for example.
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Citations
19 Claims
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1. A process for pyrolyzing mercury into gaseous elemental form comprising the steps of:
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a) receiving mercury-containing gas to be passed through a thermal pyrolysis unit, wherein the thermal pyrolysis unit contains pyrolyzer material comprising silicon carbide; and a) converting the mercury-containing gas into pyrolyzed gas by passing the mercury-containing gas through the pyrolyzer material. - View Dependent Claims (2, 3, 4, 5)
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6. A process for pyrolyzing mercury into gaseous elemental form comprising the steps of:
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a) receiving mercury-containing gas to be passed through a thermal pyrolysis unit containing pyrolyzer material; and b) converting the mercury-containing gas into pyrolyzed gas by passing the mercury-containing gas through the pyrolyzer material; wherein the pyrolyzer material comprises at least one covalently bonded material selected from the following group;
silicon carbide, silicon nitride, silicon boride, and boron nitride.
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7. A process for conditioning a sample gas stream comprising:
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(a) directing the sample gas stream into a thermal pyrolysis unit, the thermal pyrolysis unit including pyrolysis fill material; (b) passing the sample gas stream through the pyrolysis fill material thereby producing a pyrolyzed gas stream; (c) directing the pyrolyzed gas stream through a tailpiece; and (d) injecting a scrubbing liquid into the pyrolyzed gas stream in the tailpiece. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification