Process for the selective noncatalytic reduction of the emission

Details Process for the selective noncatalytic reduction of the emission Process for the selective noncatalytic reduction of the emission

1990-09-17

1992-06-02

Favors, Edward G.

Combustion

Process of combustion or burner operation

Feeding flame modifying additive

110342, 110345, F23D 700

Patent

active

051182823

ABSTRACT:
In this process for the selective noncatalytic reduction of the emission of pollutants from oil-fired boiler plants, chemical compounds which affect the combustion process are admixed, in solutions miscible with the liquid fuel, in metered amounts to the liquid fuel or to the combustion air, among these compounds being salts of organic acids, such as naphthenates, octoates, tallates, salts of sulfonic acids, saturated or unsaturated fatty acids, such as oleic acid, and tall oil, with metals from the group of K, Ba, Mg, Ca, Ce, Mn, Fe; rare earth metals; organometallic compounds, such as carbonyl compounds, mixed cyclopentadienylcarbonyl compounds, or aromatic complexes of the transition metals Fe or Mn. For the purpose of minimizing the NO.sub.x values in the waste gas and the dust load with economical consumption of chemicals, a reducing agent is introduced in metered quantities into the firebox (burner chamber) via a boiler metering system with the use of the liquid or also gaseous carrier stream as an aqueous solution of urea or also urea precursors, such as ammonia or ammonium carbonate, which can also contain further ingredients, such as alkanols, alkanecarboxylic acids, alkanals, or alkanones.

REFERENCES:
patent: 4559007 (1985-12-01), Hashimoto et al.
patent: 4793268 (1988-12-01), Kukin et al.
patent: 4998876 (1991-03-01), Farrar

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