Method for a burner and a corresponding device

A system for combustion of a fuel/oxidant mixture comprising:

• a combustion chamber;
• a material, which endures a maximum temperature lower than a combustion temperature of said fuel and said oxidation agent provided in said combustion chamber;
• a pre-mix chamber disposed upstream from an in communication with an inlet of the combustion chamber;
• separate supply lines in tangential communication with the pre-mix chamber that supply at least one of fuel and an oxidation agent, in order to conduct these into the combustion chamber;
• a low combustion value gas supply;
• and
• an additional supply line in communication with the low combustion value gas supply and the pre-mix chamber for introducing a low combustion value gas into the combustion chamber to mix with the at least one of fuel and an oxidation agent to allow the temperature during combustion to be lowered below the maximum temperature, wherein said system is less than one meter in length, and wherein said material is a porous material with inter-connected hollow spaces suitable in size for flame development.

A system for combustion of a fuel/oxidant mixture comprising:

• a combustion chamber in which a material is provided which endures a maximum temperature, the combustion chamber having an inlet and an outlet;
• a pre-mix chamber disposed upstream from and in communication with the inlet of the combustion chamber;
• separate supply lines in tangential communication with the pre-mix chamber that supply at least one of fuel and an oxidation agent to conduct these into the combustion chamber;
• a low combustion value gas supply;
• and
• an additional supply line in communication with the low combustion value gas supply and the pre-mix chamber for introducing a low combustion value gas into the combustion chamber that allows the temperature during combustion to be lowered below the maximum temperature, wherein said maximum temperature is lower than a combustion temperature of said fuel and said oxidation agent, and wherein said material is a porous material with inter-connected hollow spaces suitable in size for flame development.

A combustion system, comprising:

• a combustion chamber, for the combustion of a mixture below said mixture's combustion temperature, having an inlet, an outlet, a first chamber region, and a second chamber region intermediate said first chamber region and said inlet;
• a first porous material, disposed in said first chamber region, a pore size of which first porous material permits flame formation;
• a second porous material, disposed in said second chamber region, a pore size of which second porous material retards flame formation;
• a mixing chamber disposed upstream from and in communication with said inlet;
• a first supply line that feeds a first gas stream comprising a fuel directly into said mixing chamber;
• a second supply line that feeds a second gas stream comprising an oxidation agent directly into said mixing chamber;
• and
• a low combustion value gas supply line that supplies a low combustion value gas to said mixing chamber via said first supply line and/or said second supply line, wherein
• said first and second gas supply lines are tangentially arranged to said mixing chamber,
• said first porous material and said second porous material are chosen such that a combustion temperature of said fuel and oxidation agent exceeds the lower of a maximum temperature that said first porous material can withstand and a maximum temperature that said second porous material can withstand, and
• said first porous material and said second porous material are chosen such that a combustion temperature of a resultant mixture of said fuel, said oxidation agent and said low combustion value gas in said mixing chamber is less than said maximum temperature that said first porous material can withstand and less than said maximum temperature that said second porous material can withstand.

A combustion system, comprising:

• a combustion chamber, for the combustion of a mixture below said mixture's combustion temperature, having an inlet, an outlet, a first chamber region, and a second chamber region intermediate said first chamber region and said inlet;
• a first porous material, disposed in said first chamber region, a pore size of which first porous material permits flame formation;
• a second porous material, disposed in said second chamber region, a pore size of which second porous material retards flame formation;
• a mixing chamber disposed upstream from and in communication with said inlet;
• a first supply line that feeds a first gas stream comprising a fuel directly into said mixing chamber;
• a second supply line that feeds a second gas stream comprising an oxidation agent directly into said mixing chamber;
• a third supply line that feeds a third gas stream directly into said mixing chamber;
• and
• a low combustion value gas supply line that supplies a low combustion value gas to said mixing chamber via one or more of said first supply line, said second supply line and said third supply line, wherein
• said first, second, and third gas supply lines are tangentially arranged to said mixing chamber,
• said first porous material and said second porous material are chosen such that a combustion temperature of said fuel and oxidation agent exceeds the lower of a maximum temperature that said first porous material can withstand and a maximum temperature that said second porous material can withstand, and
• said first porous material and said second porous material are chosen such that a combustion temperature of a resultant mixture of said fuel, said oxidation agent and said low combustion value gas in said mixing chamber is less than said maximum temperature that said first porous material can withstand and less than said maximum temperature that said second porous material can withstand.