What are the 4 most common oxy fuel processes?

What are the 4 most common oxy fuel processes?

Choice of fuel gas Combustion also continues in the secondary or outer zone of the flame with oxygen being supplied from the air. The five most commonly used fuel gases are acetylene, propane, MAPP (methylacetylene-propadiene), propylene and natural gas.

What is oxy fuel technology?

Oxyfuel combustion technology depends on the concept of using pure oxygen, instead of air, to burn the fuel. The flue gases of the combustion process consist primarily from water vapor and carbon dioxide. The high concentration of CO2 in the exhaust gases facilitates its capture after the condensation of water vapor.

What is the recycle ratio in a oxy fuel combustion process?

Excess oxygen at burner inlets increases with increasing recycled flue gas for recycle flue gas containing 3.3% oxygen. When 71% of flue gas is recycled, 15.9% and 12.6% excess oxygen at burner inlets is obtained for wet and dry recycle oxy-fuel combustion respectively.

What is the difference between plasma cutting and oxy-fuel cutting?

Plasma does not require the metal to be preheated before cutting, which saves time, and plasma cutters also outperform oxy-fuel torches when cutting stacked metals. Faster speeds can be achieved on thinner metals with plasma, with minimal or no metal distortion.

What are 4 possible applications of oxy fuel gas cutting equipment?

Cutting processes – application of oxyfuel cutting

• Low cost equipment.
• Basic equipment suitable for cutting, gouging and other jobs such as welding and heating.
• Portable, suitable for site work.
• Manual and mechanised operations.
• Mild and low alloy steels (but not aluminium or stainless steel)

What is oxy-fuel burner?

An oxy-fuel burner system involves the specially designed burners, oxygen valves and piping. Unlike the regenerative burner case, the combustion equations are altered to account for the use of pure oxygen instead of air for the oxidizer.

What is oxy furnace?

Oxy-fuel combustion increases furnace efficiency, reduces emissions and improves glass quality by creating a more stable process. The addition of oxygen to the fuel almost eliminates nitrogen from the oxidiser, which greatly reduces the mass flow rate of flue gas leaving the furnace.

Can flue gas be reused?

Flue gas (FG), when it leaves the boiler, mainly consists of CO2 and water. Once dried, the CO2- enriched flue gas stream can be stored or used. The flue gas can be recycled back to the furnace in either a wet or a dry stream.

Can pure oxygen be used as fuel?

Oxy-fuel combustion is the process of burning a fuel using pure oxygen, or a mixture of oxygen and recirculated flue gas, instead of air. Since the nitrogen component of air is not heated, fuel consumption is reduced, and higher flame temperatures are possible.

Which is better plasma cutter or oxy acetylene?

Faster speeds on thinner metals: Plasma can cut thinner metals faster than oxy-fuel can, and with minimal or no metal distortion. Plasma also offers better performance when cutting stacked metals.

How often are oxy checks performed?

The BCGA Code of Practice CP7 recommends the gauges are checked annually and replaced every 5 years.

How does oxygen fuel combustion?

When a fuel is burned, oxygen in the combustion air chemically combines with the hydrogen and carbon in the fuel to form water and carbon dioxide, releasing heat in the process. Air is made up of 21% oxygen, 78% nitrogen, and 1% other gases.

Can you burn pure oxygen?

The technical reality is that the oxygen doesn’t burn,” said Mark Bruley, vice president for accident and forensic investigation at ECRI Institute. “It’s a subtlety of the physics of fire. Oxygen makes other things ignite at a lower temperature, and burn hotter and faster. But oxygen itself does not catch fire.”

What is oxy-fuel combustion capture?

In oxy-fuel combustion capture, the fuel is combusted in the presence of nearly pure (approximately 98%) oxygen to ensure that the products of combustion (flue gas) contain CO2 and water with only trace amounts of other gases.

What is oxy coal combustion?

During oxy-coal combustion, combustion air is separated into its oxygen (O2) and nitrogen (N2) components and the coal is burned in a mixture of O2 and recycled flue gas. By eliminating the N2, ~80% of the volumetric flow through the utility plant is eliminated.

Can we burn pure oxygen?

Oxygen Safety Many people believe that because oxygen is not flammable, it does not pose much risk. Even though the oxygen by itself will not burn and even though a flame may be relatively small, the oxygen will help the flame grow much larger, and you could easily ignite a lethal conflagration.

Why is oxygen not used as fuel?

Firing with pure oxygen would result in too high a flame temperature, so the mixture is diluted by mixing with recycled flue gas, or staged combustion.

Is oxygen flammable or explosive?

Oxygen is not flammable, but it can cause other materials that burn to ignite more easily and to burn far more rapidly. The result is that a fire involving oxygen can appear explosive-like.