Sizing a burner

[nomz]

Hi All,

As a rule of thumb,how much natural gas(CH4) do you require in a burner....
Q.1
I am burning 100kg/hr of H2S and using the stoichiometric ratio i can calculate how much air do I require to burn off the H2S.
The problem is I do not know how much natural gas and air do I require for this reaction,hence I ask as a rule of thumb,how much natural gas do I require?

 

[Yuze]

The question is not clear.
If you want to calculate the air required to burn natural gas, you can use the method you used to calculate burning of H2S.
If you want to size a burner, you need to define the duty required for the burner and contact with burner vendors

 

[RaRo]

The CH4 amount will be dependant on the geometry and characteristics of your burner/furnace and the amount of H2S.
The heat of combustion of your methane stream has to be enough to keep the proper temperature within the furnace (heating the air and H2S streams as well as the walls) to burn/oxide the H2S at the right temperature anytime, while not being too much when you get a heat peak due to high H2S load burning.
Follow Yuze advice, find a professional.

 

[maddocks]

Pure H2S requires no natural gas to burn as it will sustain a flame on it's own. However, you can add the fuel and do a simple stoichimetric calc on the amount of O2 required to support 100% combustion. If you're trying to achieve a certain Btu value, simply add the right amount of fuel until your mixture achieves the necessary BTU limit -i.e., 500/750/1000. Then add up your air requirements. Different burner systems will achieve different efficiencies so you might need more fuel than you think. Basic simple induction burners are about 65% efficient (at least that's what we use for our fuel requirements).