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Air quality 2
Modules 17 and 18
| Question | Answer |
|---|---|
| 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
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