Cupola Flue Gas Treatment
AssigneeNCH Corporation
InventorDonald A. Cameron
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Abstract
An additive and method of use for treating flue gas of a coke-fired cupola following removal of the blast air during shutdown to adjust the charge and reduce acid buildup in the condensate and corrosion in downstream equipment by injecting into the flue gas a finely divided spray comprising an additive containing a volatile amine mixed with an antistatic agent that creates a positive static charge in the additive, and elevates the pH of the condensate by reducing the formation of sulfuric acid from entrained sulfur-containing compounds.
Claims34
A method for treating flue gas of a coke-fired heating device during shutdown of the device, wherein the flue gas comprises dust containing negatively charged sulfur-containing compounds and having an initial pH, by injecting into the flue gas an atomized spray comprising a volatile amine mixed with an antistatic agent that creates a positive charge in the spray, whereby the positive charge attracts the negatively charged sulfur-containing compounds in the flue gas dust, and whereby the volatile amine elevates the initial pH of the flue gas dust to a less corrosive level.
A method for treating flue gas of a coke-fired cupola after a flow of blast air to the cupola is terminated, the method comprising injecting into the flue gas a spray comprising at least one volatile amine and an antistatic agent.
A method for adjusting corrosivity in flue gas and flue gas condensate of a coke-fired heating device during a cool-down phase of the device, the method comprising injecting finely divided droplets into the flue gas, the droplets further comprising a mixture of volatile amine and an antistatic agent that adjusts the pH of the flue gas to a non-corrosive level.
An additive useful for treating flue gas of a coke-fired industrial device during cool-down, the additive comprising an amine and an antistatic agent in an amount that is sufficient to neutralize the pH of a condensate obtained by spraying into the flue gas a finely divided mist containing the additive.
Dependencies are inferred from the claim text.