How to do O2 correction for stack emission?

O2 correction is only carried out, if O2 corrections > 11%.
 For O2 < 11% no correction is allowed.
It’s require to correct the value for the 11% O2 by following formula

Es = {(21 - Os) / (21 - Om) } x EM

Es = Calculated emission concentration at the standard percentage oxygen concentration

Em = Measured emission concentration

Os = Standard oxygen concentration

Om = Measured oxygen concentration

What is Stack?

Stack is nothing but chimney which is used to disperse the hot air at a great height, emissions & particulate matters that are emitted from the various types of stacks like boiler, flue gas etc. At these heights the polluted air disperse in a very large area so that concentrations at ground are within permissible limits and not harmful for humans, animals and vegetation.

There are several types of flue-gas stack based on fuel injections. Eg. DG set stack, flue gas stack, process stack, furnace stack, boiler stack, chimney etc.

What is Stack Monitoring ?

Emissions Testing, otherwise referred to as Stack Sampling or Stack Monitoring, is the experimental process for evaluating the characteristics of industrial waste gas stream emissions into the atmosphere. Materials emitted to the air from these sources can be solid, liquid, or gas; organic or inorganic.

Stack monitoring is referred as Stack emission testing, stack emission monitoring or stack sampling. It is a process to measure emission of industrial waste or pollutants emitted into atmosphere. The pollutants emitted from stack can be solid, gaseous, liquid organic or inorganic.

How to determine Static Pressure in stack

Static pressure determination
For the static pressure determination requires first to disconnect the positive end of the pitot tube then take the reading of velocity pressure.
Use the following formula for the calculation. For measurement of static gas pressure pitot tube Should be rotated by 90degree from the position of actual Δ P measurement.
This would provide better accuracy.

Ps may be calculated as Ps = P bar ± (Δ Ps / 13.6)

Where:
P bar = Barometric pressure in mm mercury column
Ps = Stack gas velocity pressure, mm water column
Ps = Static pressure mm Hg column.
Density of Hg = 13.6 

Envirotech Stack Monitoring Kit VSS3

MAIN FEATURES OF Envirotech Stack Monitoring Kit VSS3

• Specially to monitor Dioxins, Furan & provision for monitoring of Heavy Metals emissions
• Collection based on wet chemical techniques
• Measures total quantity / volume of the emissions
• Heating Probe & box assembly with auto temp controller
•  Rugged & convenient for sampling for long duration with oil free Vacuum Pump assembly
•  Glass lining inside the nozzle, thimble holder & probe pipe
• Tripod stand for better accessibility
•  Probe set accommodated in a carrying case
•  Convenient to use

List of Components Envirotech Stack Monitoring Kit VSS3:

 (1) :Instrument panel consisting of pyrometer, manometer rotameters, vacuum gauge, stop watch, dry gas meter & temperature controller. (2): Probe kit consisting of probe pipe, pitot tube, connecting hoses, tool kit, filter holder, nozzles, thermocouple, heating system, tripod etc. (3): Cold box assembly consisting of glass impingers, condenser glass coil, moisture bottle & water pump. (4): Vacuum pump assembly.

In addition Stainless Steel Probe, Hose Pipe, Thimble Holder, Set of 3 SS Nozzles, Set of 4 Glass Impingers (240ml.) for normal Stack Emission Monitoring also provided.

Size and Weight (approx) :	Length (mm)	Width (mm)	Height (mm)	Weight (Net) Kg
VSS3 Instrument Panel	400	250	400	10
VSS3 Cold Box	250	410	400	10
VSS3 Probe Box	1140	300	150	20
Vacuum Pump Assembly	340	200	280	13
Glass Assembly Box	1170	260	100	10

Warranty, all Envirotech products carry a one year warranty for trouble free operation against any manufacturing defect.

Envirotech Stack Monitoring Kit VSS3 SPECIFICATIONS

• Stack Temperature Range:Ambient to 600 deg C read on a Digital Pyrometer.
• Stack Velocity Range:3 to 60 m/sec
• Thermocouple:T/C sensor in SS 304 casing, length of insertion: 1 m with 2m long cable.
• Manometer:Digital with 0-1060 mm of H2O range
• Pitot Tube:Calibrated S-type fabricated -SS 304, 1m long
• Particulate Sampling:0 –30 lpm collection on thimble type filter up to 0.3 micron rating.
• Gaseous Sampling:0 – 3 lpm collection in a set of Borosilicate glass impingers.
• Rotameter:Acrylic body with 2% FSD accuracy, 0 – 30 lpm for PM and 0-3 lpm for GAS.
• Sampling Probe:1m long SS tube with inside lining of Teflon & provision for controlled at 120 deg C heating.
• Filter Holder:Glass filter holder with heating provision suitable to hold either cellulose filteration thimble (size 28mm lD X 100mm long) or glass fibre thimble (size 19mm lD X 90mm long).
• Nozzles:A set of 5 glass nozzles.
• Digital Clock:0-60 minutes, 1 second readout with start and stop switches.
• Temp. Controller:Digital type temperature controller.
• Dry Gas Meter:Range 0 to 60 LPM connected to SPM line.
• Sampling Train:4 Nos. of 275 ml cap glass impinger, 1 No. condenser glass coil, 1 No. moisture bottle 750 ml & 1 No. cartridge tube accommodated in separate ice tray with instrument panel with a provision to cool down flue gas temperature.
• Vacuum Pump:Monoblock Rotary Vane type, oil free, 0.5 HP single phase motor (230V) with more than 50 lpm free flow capacity.
• Envirotech Stack Monitoring Kit VSS3

Click to DOWNLOAD CATALOG for Envirotech Stack Monitoring Kit VSS3

Envirotech Stack Monitoring Kit VSS1 PLS

The most common and widely used method (world over) is extractive sample method or Grab sampling technique. Grab sampling technique is also often treated as the reference standard method. Grab Sampling technique is not restricted to a specific pollutant. The same system with different reagents may be used for a variety of pollutants and over different ranges of concentration. Envirotech Stack Monitoring Kit VSS1 PLS is one such Grab Sampler which can monitor Particulate Matter (PM) and any water-soluble gaseous pollutants l ike SO, NO., HF, Cl, , H, S, NH, etc., in industrial emissions from Stationary source I Chimney and Vent.

Utilizing the experience of last 30 years, CPCB in 2015 revised the specifications of the Stack Sampling System & Envirotech has produced a new model Envirotech Stack Monitoring Kit VSS1 PLS with improved features strictly in compliance with latest CPCB guidelines so as to obtain reliable results. Envirotech Stack Monitoring Kit VSS1 PLS overcomes all the drawbacks of previous models.
The operating principle is simple. The Particulate Matter is collected over a filtration thimble. It entraps
and absorbs various gaseous pollutants in suitable reagents, which are analyzed subsequently by simple Wet Chemistry methods to determine the concentration of specific pollutants.

MAIN FEATURES 

Envirotech Stack Monitoring Kit VSS1 PLS

1. Cumbersome Manometer has been replaced with digital pressure cell
2. Designed to determine the velocity of gases also.
3. Measures total quantity/volume of the emissions very accurately.
4. Size and weight of panel has been reduced considerably.
5. Pitot and probe pipe is being provided with extendable arm of 1m each.
6. Calibrated Pitot, probe pipe, thimble holder, nozzles, tools etc, all accommodated in a carrying case.
7. Temperature and pressure at inlet of the rotameter, in order to normalize volume of the sampled gas.
8. Number of joints have been reduced & thus chances of leakages are minimized
9. Tripod stand for better accessibility.
10. Compact Hardware & Portable light weight rotatory vane type pump etc.
11. Standard accessories like rotameter, pressure & temperature, metering system & provision for simultaneous sampling.
12. Sampling train with improved glass joints & ice tray for better cooling.
13. Specially designed 2 thermocouples in the range 0-500C and 0-1000C
14. Leveling assembly ensures that the Rotameter is standing in right angle vertically.
15. Dry Gas Meter added in panel itself to measure total sample volume.
16. Ambient Temperature Sensor with Digital Display.
17. Special Push-Fit Joints to minimize the assembly time.
18. Easy Leak Check facility to ensure accurate monitoring.
19. Programmable timer for sampling vacuum pump
20. Provided with NABL Calibration Certificate

• Stack Temperature Range:Ambient to 600 deg C and 500-1000C read on separate Digital Pyrometers
• Temperature Sensor:At Metering Point (0-50 o C)
• Ambient Temperature:Ambient temp. Digital display
• Stack Velocity Range:0 to 60 m/sec
• Thermocouples:Thermocouple sensor in SS 304 casing, length of insertion: 1 m with 2m long cable. Additional 1m thermocouple for High Temperature range
• Manometer:Calibrated S-type pitot tube fabricatedfrom SS304, 1m length
• Pitot Tube:2 –60 lpm collection on thimble type filter up to 0.3 micron rating.
• Particulate Sampling:0.2 – 6 lpm collection in a set of Borosilicate glass impingers.
• Gaseous Sampling:0.2 – 6 lpm collection in a set of Borosilicate glass impingers.
• Rotameter:Acrylic body rotameter with 2% FSD accuracy, 0 – 60 lpm for Particulate and 0-6 lpm for gases.
• Sampling Probe:Made from SS 304 tube, 1m length
• Filter Holder:Fabricated from SS 304 tube suitable to hold either cellulose filteration thimble (size 28mm lD X 100mm long) or glass micro fibre thimble (size 19mm lD X 90mm long).
• Nozzles:A set of 4 stainless steel nozzles.
• Digital Clock:0 -60 minutes, 1 second readout with start and stop switches.
• Impingers:4 No. of 250 ml capacity and 4 No. of 120ml capacity borosilicate glass impingers supplied with cold box with a provision to keep ice.
• Vacuum Pump:Monoblock Rotary Vane type, oil lubricated, 0.5HP single phase motor (230V) with more than 60lpm free flow capacity
• Programmable Sampling:Programmbale Timer for Vacuum Pump to start and stop at fixed time interval.
• Dry gas Meter:Dry Gas Meter with Resolution of 1L
• Envirotech Stack Monitoring Kit VSS1 PLS
• Click to DOWNLOAD CATALOG for Envirotech Stack Monitoring Kit VSS1 PLS
• 
  

Envirotech Stack Monitoring Kit VSS1

The most common and widely used method (world over) is extraction sample method or Grab sampling Digital Pressure Cell in place of cumbersome manometer. Measures total quantity I volume of emissions. Determines velocity of gases. Reduction in size and weight of panel. Extendable arm for pitot and probe pipe. Probe set accommodated in a carrying case. Provision of measuring temperature and suction pressure at metering point individually for PM & GAS stream. Minimum number of joints to minimize leakages. Tripod stand for better accessibility. Compact Hardware & Portable light weight vacuum pump. Sampling train with simplified glass joints.technique. Grab sampling technique is also often treated as the reference standard method. Grab Sampling technique is not restricted to a specific pollutant. The same system with different reagents may be used for a variety of pollutants and over different ranges of concentration. This envirotech Stack monitoring kit VSS1 is one such Grab Sampler which can monitor Particulate Matter (PM) and any water soluble gaseous pollutants like SO, , NO., HF, Cl, , H, S, NH, etc., in industrial emissions from Stationary source I Chimney and Vent.

PORTABILITY FOR ROUTINE SAMPLING Only repeat and frequent monitoring can give a true insight into the emission characteristics. It is thus more important to have a simpler and handy device,which can be used more often with ease and convenience, rather than a bulky and cumbersome system. At times transportation efforts become more hectic & expensive than the actual monitoring exercise. Based on our experience and valuable feedback obtained from our large group of valuable customers, regulatory authorities, consultants, and R&D Centers, need for improved and Handy instrument has been felt.

The Envirotech Stack Sampler VSS1 has been designed to overcome such problems. The operating principle is simple. The Particulate Matter is collected over a filtration thimble. It entrap and absorbs various gaseous pollutants in suitable reagents, which are analyzed subsequently by simple Wet Chemistry methods to determine the concentration of specific pollutants. 

MAIN FEATURES

• 
  
• Envirotech Stack Monitoring Kit Specification

​

• Stack Temperature Range:Ambient to 600 deg C read on a Digital Pyrometer
• Stack Velocity Range:3to60 m/sec
• Thermocouple:TIC sensor in SS 304 casing, length of insertion: 0.6 m with 2m long cable
• Manometer:Digital with 0-1300 mm of H,0 range
• Pitot Tube:Calibrated S-type fabricated -SS 304, 0.6 m extendable to 1.2m
• Particulate Sampling:2-30 lpm collection on thimble type filter up to 0.3 micron rating
• Gaseous Sampling:0.2-3 1pm collection in a set of Borosilicate glass impingers
• Rotameter:Plastic body with 2% FSD accuracy, 0-30 lpm PM and 0 - 3 lpm for GAS
• Sampling Probe:Made from SS 304 tube, 0.6 m length extendable to 1.2m
• Filter Holder:Fabricated from SS 304 tube suitable to hold either cellulose filtration thimble (Size 28mm 10 X 100 mm long) or glass micro fibre thimble (size19mm ID X 90mm long)
• Nozzles Digital:A set of 3 stainless steel nozzles
• Clock:0-60 minutes, 1second readout with start and stop switches
• Sampling Train:1 No. of 240 ml cap. & 2 No. of 120 ·ml cap. borosilicate glass impingers accommodated in ice tray, placed on the rear side of instrument panel with a provision to keep ice
• Vacuum Pump:Monoblock Rotary Vane type, oil lubricated, single phase::.: motor (230V) with more than 50. lpm free flow capacity
• 
  
• Envirotech Stack Monitoring Kit Dimensions
• ​

Size and Weight (approx)	Length (mm)	Width (mm)	Height (mm)	Weight (Net) Kg
VSS1 Instrument Box	480	310	140	7
Vacuum Pump Assembly	310	150	170	10
Probe Set	810	155	210	14

​WARRANTY: ALL ENVIROTECH PRODUCTS CARRY A ONE YEAR WARRANTY FOR TROUBLE-FREE OPERATION AGAINST ANY MANUFACTURING DEFECT.

Click to DOWNLOAD CATALOG for Envirotech Stack Monitoring Kit