Date:7/12/2015 Anand Patankar

Optimising Combustion

using a

Flue Gas Analyser

2/15 Testo IN,

What is Combustion?

Conversion of primary energy into secondary energy is Combustion.

OR simply put, Burning means Combustion.

Fuel is burnt and air is necessary to carry out this process of burning.

For a known amount of fuel, a fixed amount of

air is needed for the fuel to burn completely.

This is known as complete combustion.

Complete combustion is not

practically possible in a Boiler.

Why?

3/15 Testo IN,

Importance of excess air

Mixing of fuel and air is not proper. To compensate for lack of mixing,

we introduce extra air or excess air inside the Boiler Combustion

Zone.

This excess air only facilitates complete combustion, and then comes

out of the exhaust.

We measure the oxygen content in this air, to find out what kind of

Combustion is happening inside the Boiler. The instrument used to

measure this Oxygen content is known as the Flue Gas Analyser.

4/15 Testo IN,

Controlling the Excess Air

1. Adequate excess air means complete combustion.

2. Less excess air means incomplete Combustion, unburnt fuel, and

increase in CO content.

3. More excess air means the heat produced during the combustion

is driven away, resulting into heat losses

5/15 Testo IN,

Efficiency control and adjustment

Important parameters :

- O2 - efficiency

- CO - excess air ()

- CO2

Your benefits :

- increase the efficiency

- save fuel & money

- reduce the emissions

Air to Fuel Ratio & Adjustment

6/15 Testo IN,

Selecting the right Instrument

1. Which gases?

2. Stack Diameter?

3. Stack Temperature?

4. Fuel Type?

5. Dust Content?

6. dP? Velocity?

7. Software?

Testo Flue Gas Analysers

8/15 Testo IN,

Testo 310

- Flue gas testing is essential for

the monitoring of furnaces

- testo 310 directly registers

temperature, O2 and CO

- All other parameters (CO2, Eff,

lambda ...) are calculated from

these and the fuel-specific

parameters

9/15 Testo IN,

Testo 320

Flue gas measurement is

essential for the monitoring of

furnaces.

The large variety of probes allows a

flexible reaction to any type of

measuring environment

The parameters temperature, O2 and

CO are directly measured by the testo

320 and are stored locally

All other parameters are calculated

based on these and the fuel-specific

information

10/15 Testo IN,

Testo 330 LL

- Can be used for a wide range of temperatures.

- Large graphical colored display for easy analysis.

- Longest sensor life with the latest technology.

- Min. down time, typically maintenance free for 6 Yrs.*

- High ROI.

- Helps you measure the combustion

efficiency of your Boiler.

- In turn helps you to save precious fuel in

turn Money.

11/15 Testo IN,

Testo 340

12/15 Testo IN,

testo 340 – Room for 4 gas-sensors

1

2

3

4

Benefit

• Flexible reaction to a wide range of applications

• Real NOx-measurement (O2+CO+NO+NO2)

Slot 1 Slot 2 Slot 3 Slot 4

O2 –sensor

standard

CO S

ing

le s

en

so

r dilu

tion

fac

tor 5

NO CO

COlow NOlow COlow

NO NO2 SO2

NOlow NO2

SO2

Option: Dilution for all sensors factor 2

• NEW 3 sensors freely selectable (a second sensor must be fitted)

13/15 Testo IN,

testo 350 – The NEW testo 350

14/15 Testo IN,

testo 350 – The NEW testo 350

• Intuitive operation without previous knowledge

due to the application-specific menu with useful instrument pre-

settings

• Fast and easy analysis

due to the new clearly arranged colour

graphic display

• Operation under the toughest conditions

due to the robust, inherently

sealed housing with built-in

impact protection

• Cost and time savings

due to the very easy access

to all relevant service parts,

wearing parts and gas sensors

15/15 Testo IN,

Modular Probes

Benefit

• Easy removable filter in the probe handle

• All-in-one-connection: flue gas and temperature

input (very safe)

• Connections are completely sealed

• Fast probe exchange

Thank you

For more details log on to -

www.testo.in

Or write to us at:

info@testoindia.com

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