Title:
【発明の名称】SOx/NOx汚染制御組成物およびESP帯褐暗紫色の制御方法
Document Type and Number:
Japanese Patent JPH03501944
Kind Code:
A
Abstract:
SOx/NOx pollution control reagent composition comprising from 0.1 to 25% urea in intimate admixture with dry, finely divided Nahcolite, a naturally occurring form of sodium bicarbonate. The composition is used in a process of removing SOx/NOx from the flue gases of utility and industrial plants, incinerators and the like by dry injection into a flue gas duct a sufficient distance upstream of a spent reagent collection device to provide above about 0.25 seconds of residence time of the reagent composition in the flue gas duct at temperatures in the range of above about 200 DEG F. followed by collection, preferably in an electrostatic precipitator. The Nahcolite reacts with the SO2 to form sodium sulfate and also removes NOx in the form of NO. The urea prevents the conversion of NO to NO2 by the Nahcolite, and maintains the concentration of the NO2 in the exit flu gases below the 50 parts per million visibility threshold (depending on ambient conditions). The user of urea in the composition improves the SOx removal efficiency and utilization of the Nahcolite to near theoretical. The reagent composition and process can be employed in a wide variety of pollution control processes employing various types of standard sorbent contact equipment such as ESPs, baghouses, spray dryers, fluid beds, cyclones, scrubbers and co-current/counter current reactors.
More Like This:
Inventors:
Hooper, Richard G.
Application Number:
JP50470289A
Publication Date:
May 09, 1991
Filing Date:
March 20, 1989
Export Citation:
Assignee:
CRS Inc.
International Classes:
B01D53/50; B01D53/56; B01D53/60; B01D53/74; B01D53/81; (IPC1-7): B01D53/34
Attorney, Agent or Firm:
Toshio Yano (2 outside)