Flaring gas, biogas, digester gas, and landfill gas is a viable way to reduce greenhouse gas (GHG) emissions, and thermal mass flow meters provide an improved method to measure flow to the flare.
To recap our flare gas measurement series, in Improved Method for Measuring Flare Gas, we discuss measuring flare flow using thermal mass flow meters. In Thermal Mass Meter Challenges, we show that extreme flow variation, changing gas composition, and working in hazardous locations are among the challenges associated with flare gas measurement, and in Measuring Flare Gas, Changing Gas Composition and Hydrogen, we consider the problem of changing gas composition and the presence of hydrogen. Last week we explored the needs for flare gas flow measurement and how thermal flow meters can satisfy the requirement and save versus ultrasonic flowmeters.
In this post, we explore the application of biogas, landfill gas, and digester gas flaring.
Flare Biogas and Landfill Gas
Biogas, digester gas, and landfill gas can be produced from industrial wastewater treatment, farming operations, municipal solid waste landfills, and industrial waste landfills. These gases contain a mixture of methane (CH4), carbon dioxide (CO2), and lesser quantities of other constituents. The gases can also be converted to renewable energy and fuel on-site boilers with the excess gas being flared. They can also generate electricity, sell the energy to local industries, or even create fuel for natural gas-fueled vehicles.
If the operator is allowed to, the facility may either release the combustible gas directly to the atmosphere or burn it with a flare. Focusing on reducing greenhouse gas (GHG) emissions, flaring the gas provides an opportunity to reduce emissions. Biogas from a digester is a mixture of approximately 65% CH4 and 35% CO2, while landfill gas is closer to half CH4 and CO2. This gas can then be captured and destroyed in a methane destruction process, which is accomplished by flaring the gas. While the process creates carbon dioxide, a greenhouse gas, it destroys methane, which is 21 times more potent than CO2. For this reason, flaring biogas, digester gas, and landfill gas is a viable method for lowering GHG emissions.
Flare Gas Systems
Flaring and venting systems are used globally to burn off waste gas, excess gases and are also a means to protect process equipment, the system’s processes, and the environment. Flaring systems are used extensively in wastewater treatment, landfills, and farming operations.
The extraordinary rangeability and ease-of-installation of SAGE Thermal Mass Flow Meters offer economical solutions for the measuring, monitoring, and reporting of flare gas in different systems, including biogas, landfill gas, and natural gas; as well as applications at oil refineries and chemical plants when the gas composition is known.
Also, in cases of varying composition, SAGE can produce an error analysis. If a decreased accuracy is acceptable to the operator, a thermal mass flow meter may provide a reasonable alternative to the high cost of ultrasonic flow meters.
If you desire to see our white paper in its entirety, visit measuring flare gas.
Perhaps you may find this video interesting.