DAQ-2024-010153

Utah Division of Air Quality
New Source Review Section Company ________________________
Site/Source
Form 9 Date _____________________________
Scrubbers & Wet Collectors

Equipment Information

1. Provide diagram of internal components (attachment)

2. Manufacturer:__________________________
Model no._____________________________
3. Date installed: 4. Emission Equipment served:

5. Type of pollutant(s) controlled:
Particulate (type)___________________________
SOx _____________________________________
Odor_____________________________________
Other ____________________________________

6. Type of Scrubber:
□ Spray Chamber □ Venturi
□ Cyclone □ Packed Tower Type
□ Orifice □ Mechanical
7. Gas Stream Characteristics

Flow rate (acfm)

Gas Stream
Temperature (oF)

Particulate Grain Loading
(grains/scf)
Design
Maximum

Average
Expected

Inlet

Outlet

Inlet

Outlet

8. Particulate size: ____________________________ microns (mean geometric diameter)
Scrubbing Liquid Characteristics

10. Liquid Injection Rate (gpm)

Design Maximum

Average Expected

9. Scrubbing Liquid
PH _________ Range ______ - _______
Composition Wt. %
1. ____________________ __________________
2. ____________________ __________________
3. ____________________ __________________
4. ____________________ __________________
5. ____________________ __________________
6. ____________________ __________________

11. Pressure at Spray

Nozzle: __________
(psia)

12. Pressure Drop thru
Scrubber
_____________
(inches of water)
Data for Venturi Scrubber Data for Packed Towers

13. Throat Dimensions
(Specify Units)

14. Throat Velocity
(ft/sec)

15. Type of Packing

16. Superficial Gas
Velocity through Bed
Page 1 of 3
Page 2 of 3

Form 9 Scrubbers & Wet Collectors - Continued

Data Stack/Exhaust Exit

17. Height: ______feet

18. Temperature of
exhaust stream:
_______ oF

19. Inside dimensions:
______feet diameter or
______feet x _______feet

20. Monitoring Equipment

Type Manufacturer Model Range Units
Gas Pressure ___________________ ________________ ______________ inches of water column
Water Flow ___________________ ________________ ______________ gallons per minute
Water Pressure ___________________ ________________ ______________ pounds per square inch

Settling Ponds

22. Flow rate through settling pond:

21. Dimensions of settling pond:
Width:
Length:
Depth:
23. Residence time of water in pond:

Emissions Calculations (PTE)

24. Calculated emissions for this device
PM10 ___________Lbs/hr___________ Tons/yr PM2.5 ___________Lbs/hr___________ Tons/yr
NOx ____________Lbs/hr___________ Tons/yr SOx ____________Lbs/hr___________ Tons/yr
CO ____________Lbs/hr___________ Tons/yr VOC ___________Lbs/hr___________ Tons/yr
HAPs___________Lbs/hr (speciate)____________Tons/yr (speciate)
Submit calculations as an appendix.

Page 3 of 3

Instructions – Form 9 Scrubbers & Wet Collectors

NOTE: 1. Submit this form in conjunction with Form 1 and Form 2.
2. Call the Division of Air Quality (DAQ) at [phone] if you have problems or questions in
filling out this form. Ask to speak with a New Source Review engineer. We will be glad to help!

1. Supply an assembly drawing, dimensioned and to scale of the interior dimensions and features of
the equipment. Please include inlet and outlet liquid and gas flow directions and temperatures, and
demister section.
2. Specify the manufacturer and model number of equipment.
3. Please indicate the date that the equipment was installed.
4. Specify what type of equipment or process the scrubber is being used for.
5. Specify what pollutant is being controlled by the scrubber/wet collector.
6. Specify the type of scrubber.
7. Supply the specifications for the gas stream including the flow rate at the design maximum and
expected average, inlet and outlet temperatures, and particulate grain loading at inlet and outlet.
8. Supply the particulate mean geometric diameter.
9. Supply the composition of the scrubbing liquid used in the equipment.
10. Indicate what the liquid injection rate is for the design maximum and the expected average in
gallons per minute.
11. Indicate the pressure at the spray nozzle.
12. Identify what the pressure drop through the scrubber is.
13. Indicate what the throat dimensions are for a venturi scrubber.
14. Indicate what the throat velocity is for a venturi scrubber.
15. Indicate what the type of packing is in a packed tower.
16. Specify what the gas velocity is through the bed in a packed tower.
17. Indicate what the stack height is of the scrubber.
18. Indicate the temperature of the exhaust gas.
19. Supply the inside dimensions of the stack.
20. Supply specifications of any monitoring equipment which is used in the system.
21. Specify the dimensions of the settling pond.
22. Indicate the flow rate of the water through the settling pond.
23. Supply the residence time of the water in the settling pond.
24. Supply calculations for all criteria pollutants and HAPs. Use AP42 or Manufacturers data to
complete your calculations.

U:\aq\ENGINEER\GENERIC\Forms 2010Form09 Scrubbers.doc
Revised 12/20/10