Process for the manufacture of synthesis gas by partial oxidation of a liquid hydrocarbon-containing fuel using a multi-orifice burner
View Patent ↗The invention is directed to a process to prepare a mixture of hydrogen and carbon monoxide by performing a partial oxidation on a hydrocarbon feed using a multi-orifice burner provided with an arrangement of separate passages, wherein the hydrocarbon flows through a passage of the burner, an oxidiser gas flows through a separate passage of the burner and wherein the passage for hydrocarbon feed and the passage for oxidiser gas are separated by a passage through which a moderator gas flows and wherein the exit velocity of the moderator gas is greater than the exit velocity of the oxidiser gas.
1. A process to prepare a mixture of hydrogen and carbon monoxide by performing a partial oxidation on a liquid hydrocarbon-containing feed using a multi-orifice burner provided with an arrangement of separate passages, wherein the liquid hydrocarbon-containing feed flows through a liquid hydrocarbon-containing feed passage of the burner, an oxidiser gas flows through a separate oxidiser gas passage of the burner and wherein the liquid hydrocarbon-containing feed passage for liquid hydrocarbon-containing feed and the oxidiser gas passage for oxidiser gas are separated by a moderator gas passage through which a moderator gas flows and wherein the exit velocity of the moderator gas is between 40 and 200 m/s and is greater than the exit velocity of the oxidiser gas and is at least 5 times greater than the exit velocity of the liquid hydrocarbon-containing feed.
2. A process according to claim 1 , wherein the exit velocity of the moderator gas is between 40 and 150 m/s.
3. A process according to claim 1 , wherein the exit velocity of the liquid hydrocarbon-containing feed is between 2 and 40 m/s.
4. A process according to claim 2 , wherein the exit velocity of the moderator gas is between 60 and 120 m/s.
5. A process according to claim 1 , wherein the exit velocity of the oxidiser gas is between 30 and 150 m/s.
6. A process according to claim 3 , wherein the exit velocity of the liquid hydrocarbon-containing feed is between 2 and 20 m/s and exit velocity of the oxidiser gas is between 30 and 70 m/s.
7. A process according to claim 1 , wherein the multi-orifice burner has from 4 to 7 passages.
8. A process according to claim 7 , wherein the multi-orifice burner has 7 passages and wherein moderator gas flows through the outer most passage at a velocity of between 5 and 40 m/s.
9. A process according to claim 1 , wherein the moderator gas is steam.
10. A process according to claim 1 , wherein the liquid hydrocarbon-containing feed is a heavy crude oil residue, having a kinematic viscosity between 1 and 3000 cSt, as measured at the temperature of the hydrocarbon feed as it is supplied to the burner.
11. A process according to claim 1 , wherein the oxidiser gas comprises of a mixture of pure oxygen having a purity of between 95 and 100 vol % and a moderator gas, wherein the content of moderator gas in such a moderator-pure oxygen mixture is between 10 and 30 wt %.
12. A process according to claim 11 , wherein the velocity of the moderator gas is increased by reducing the content of moderator gas in the moderator--pure oxygen mixture and increasing the amount of moderator gas, as provided to the moderator gas passages for moderator gas, which moderator gas passage separates the liquid hydrocarbon-containing passage for the liquid hydrocarbon-containing feed and the oxidiser gas passage for oxidiser gas.
13. A process according to claim 11 , wherein the velocity of the moderator gas is decreased by redirecting part of the moderator gas from the moderator gas, as provided to the moderator gas passages for moderator gas, which moderator gas passage separates the liquid hydrocarbon-containing passage for the liquid hydrocarbon-containing feed and the oxidiser gas passage for oxidiser gas, to the moderator-pure oxygen mixture.
14. A process according to claim 12 , wherein the throughput of the total of moderator gas, the total of pure oxygen and the total of liquid hydrocarbon-containing feed remains substantially the same.