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Air quality 2

Modules 17 and 18

QuestionAnswer
Why would you use a combo of particulate and gas PCD? You rarely get just gas or just particulate
Sulfur dioxide pollution prevention coal beneficiation -removing sulfur from the inorganic portion so only organics are left. this is done by sinking the inorganics. reduces sulfur by 20%
Sulfur dioxide control flue gas desulfurization -wet scrub with limestone slurry -dry scrub with limestone fluidized bed -downstream baghouse removes particulates -success depends on sorbent type, sorbent recyclability, and treatment -pricey
Nitrogen dioxide prevention low NOx burners/staged combustion -fuel rich and oxygen lean= CO not NO -fuel lean and oxygen rich=CO to CO2
Nitrogen dioxide control NOx reduction -ammonia is injected as a reducing agent
The purpose of point source emissions monitoring Obtain representative samples on a continuous basis eo monitor compliance.
Assessments required by the AEPEA include: a) general b)industry specific c)company specific d) a and b e) a and c d) includes both general and industry specific info
Assesments required by the ADR include: a)general b) industry specific c) company specific d) none of the above c) company specific
Examples of assessment methods stack sampling opacity testing emission factors continuous emission monitoring systems
Minimum sampling equipment required Sample probe, pitot tube, collection media, sample pump, measuring device
How often does compliance monitoring occur in AB? Once a year
Manual monitoring requirements Three 1-hr tests where the average is below the limit, 2/3 are below the limit, 80% usual operating rate, and report 30 days after.
Opacity testing The relative darkness of a plume with an average of 24 readings in 6 minutes. Ringlemann charts can be used as aids
CEMS acronym continuous emission monitoring system
What is isokinetic sampling The conditions inside of tube are the same as the outside
When was CEMS code accepted in AB? 1998
Extractive CEMS systems The sample is removed and then analyzed. -source level sampling (direct) -dilution
Adv and disadv of dilution sampling Adv -reduces impact of moisture and reduces corrosivity Disadv -levels may be too small to read and temperature fluctuations
Types of analyzers NOx=chemilluminescence SO2=pulsed fluorescence CO=IR VoC=GC
How does NOx analysis work Chamber 1 -NO+O3=NO2 which is measured Chamber 2 -NO2 into NO then back to NO2 Calculate
What type of light does SO2 absorb UVA
How does CO analysis work reference cell w/non absorbing gas sample cell detector cell with equal amounts of CO More CO will cause membrane in detector cell to move. This is measured.
What is the daily span You document the accuracy by spiking the sample with a known amount of pollutant
What is the daily zero introduce a clean sample and make sure the zero reading is accurate
RATA acronym Relative accuracy testing audit -Twice a year, pass/fail -Compares to third party results
CGA acronym Cylinder gas audit -Twice a year, pass/fail -Traceable standard is measured
What is an emission factor A value which quantifies the pollutant relative to the activity
Created by: swilson67