What is flue gas?
Flue gas refers to gaseous substances that
pollute the environment when fossil fuels such as coal are burned. These exhaust gases are
combustion hot air and residual substances and usually discharged from the
flue, chimney, channel, stack, power boilers ,industrial furnaces, duct or
boilers, Its composition is hot air, nitrogen (N2), carbon dioxide (CO2),
oxygen (O2), water vapor (Moisture) and sulfide ( such as SO2), etc., inorganic
pollutants account for more than 99% of the stack gases; the content of dust or
particles, powder slag and sulfur dioxide is less than 1%. Some stack gas is
from acid plant stack, may a little corrosive with SO2 (low level ppm ).
Why stack gas flow measurement is not easy.
Flue gas flow rate measurement sometimes is difficult,
because the stack gas is high temperature ( up to 400-500 °c ), also the exhaust gas
is dirty with solids and may also a little corrosive,The flue gas may also
contained water vapor .
The stack or duct may also have large diameter or
large pipeline or round ducts, rectangular or square ducts or HVAC air
flow measurement in large duct. Stack flow meter
technology and how to measure air flow rate is really troublesome.
However you can buy thermal mass flow
meter as stack gas flow meter. It has insertion probe flow sensors install through the pipe or duct wall. Also all
wet parts material is 316L for low acid gas measurement. Immersible mass
flow meters can also measure moisture gas within 10% percentage. Thermal dispersion
flow meters are for Continuous Emission Monitoring (CEM) systems for flue gas
or air emission monitoring and duct flow measurement. Ultrasonic stack gas flow
meter is currently not available now for us.
Features of flue gas flow meter
Duct mounted air flow meter does not
need temperature and pressure correction for gas flow measurement to realize
mass flow measurement
Flue gas flow rate measurement is
convenient and accurate. The stack gas mass flow or standard stack volume flow
can be obtained
Stack gas flow transmitter has wide
range ratio, can measure flue gas with flow velocity as high as 100Nm/s to
0.5Nm/s, which can be used for gas leak detection. It can detect flue gas at
low pressure at 1-2Kpa or lower.
Low flow flow meter ,can detect micro flow rate of gas and air
Stack mass flow sensor has good
The duct flow sensor has no moving
parts and flue gas measurement is not affected by vibration on measurement
Easy installation and maintenance,
stack gas flow meter can be inline type flow meter or insertion type flue gas
mass flow meter.
Digital flue gas flow meter with electronic
display, remote and integral display options
RS-485 communication, or HART
communication, factory automation and integration can be realized, perfect
choice for stack gas or air emission monitoring.
Low price cost from China flow meter
Technical specifications for exhaust gas flow meter
Applications: gas, air, combustion hot air, stack gas, flue gas, fare gas,air outlet
of a stack after a scrubber, flue gases from natural gas,high temperature
Size : from DN15 to DN6000, normal
request 8 inches,DN 400mm, 500mm, 800mm, 900mm 1200mm ,2m, 3 meters,5 meters flue gas
Install flue gas sensor : insertion
with ball valve , NPT thread , flange connection, hot tap
Stack flue gas flow measurement accuracy: 1.0 or 1.5
High temperature for stack gas flow
meter: max bear 350 °c
Output: current analog 4-20mA or RS485
Industrial air flow meter sensor
material: 316 L or Teflon coated sensor
Duct air flow measuring device power
supply: 220V AC or 24 V DC
Measured medium temperature: normal
temperature -25°c ~ 100°c, high temperature can reach to 350 °c
Explosion-proof grade: intrinsically
safe type iaIIbT3-T6
Protection level: IP65
Industrial air flow meter with many flow
measurement units: CFM,SCFM, Nm3/h
flow meter buy from China flow meter factory