Thermal integration in synthesis gas production by partial oxidation
AssigneeL'Air Liquide, Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude
InventorMatthias Mueller-Hagedorn
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Abstract
A process and a plant are proposed for producing a synthesis gas including hydrogen and carbon oxides by partial oxidation of carbon-containing fuel in the presence of an oxygen-containing oxidant and a moderator, wherein the obtained raw synthesis gas is laden with soot particles. According to the invention the cooling of the raw synthesis gas is carried out using a crossflow heat exchanger, a shell and tube heat exchanger or a spiral heat exchanger, wherein the carbon-containing input stream or the oxidant stream or the moderator stream or a plurality of these streams serve as the first coolant and are thus preheated before introduction into the partial oxidation plant.
Claims15
A process for producing a raw synthesis gas containing hydrogen and carbon oxides by noncatalytic partial oxidation of a solid, liquid or gaseous carbon-containing input stream with an oxygen-containing oxidant, comprising:
- (a) providing the carbon-containing input stream in fluid or fluidized form, providing an oxidant stream,
- (b) providing a partial oxidation reactor comprising a reaction chamber having an inlet and an outlet, a burner arranged at the inlet of the reaction chamber and a cooling chamber arranged downstream of the outlet of the reaction chamber and in fluid connection therewith,
- (c) providing a cold, water-containing quench medium stream,
- (d) introducing the carbon-containing input stream and the oxidant stream into the reaction chamber via the burner,
- (e) at least partially reacting the carbon-containing input stream with the oxidant stream under partial oxidation conditions in the burner and/or in the reaction chamber arranged downstream of the burner to afford a hot raw synthesis gas stream,
- (f) discharging the hot raw synthesis gas stream from the reaction chamber and introducing same into the cooling chamber,
- (g) subjecting the hot raw synthesis gas stream in the cooling chamber to the cold, water-containing quench medium stream to obtain a cold raw synthesis gas stream and a stream of hot, liquid quench medium laden with solids particles,
- (h) discharging the cold raw synthesis gas stream from the partial oxidation reactor for further processing or further treatment,
- (i) discharging the hot, liquid quench medium stream laden with solids particles from the partial oxidation reactor and introducing at least a portion of the hot quench medium stream into a first heat exchanger for cooling the hot quench medium stream by indirect heat exchange against a first coolant to obtain the cold quench medium stream,
- wherein the first heat exchanger is selected from the group consisting of:
- (i1) crossflow heat exchangers, wherein the coolant is passed through tubes which have the hot quench medium stream flowing around them,
- (i2) shell and tube heat exchangers, wherein the coolant flows through the tube side and the hot quench medium stream flows through the shell side, and
- (i3) spiral heat exchangers,
- wherein the carbon-containing input stream or the oxidant stream or a plurality of these streams serve as the first coolant and are thus preheated before introduction into the burner, and
- (j) discharging the cold quench medium stream from the first heat exchanger and recycling at least a portion of the cold quench medium stream to the cooling chamber to form a quench medium stream circuit.
A plant for producing a raw synthesis gas containing hydrogen and carbon oxides by noncatalytic partial oxidation of a solid, liquid or gaseous carbon-containing input stream with an oxygen-containing oxidant, comprising:
- (a) a means for providing the carbon-containing input stream in fluid or fluidized form, a means for providing an oxidant stream,
- (b) a partial oxidation reactor comprising a reaction chamber having an inlet and an outlet, a burner arranged at the inlet of the reaction chamber and a cooling chamber arranged downstream of the outlet of the reaction chamber and in fluid connection therewith,
- (c) a means for providing a cold, water-containing quench medium stream,
- (d) a means for introducing the carbon-containing input stream and the oxidant stream into the burner,
- (e) a means for discharging a hot raw synthesis gas stream from the reaction chamber and a means for introducing same into the cooling chamber,
- (f) a means for subjecting the hot raw synthesis gas stream in the cooling chamber to the cold, water-containing quench medium stream,
- (g) a means for discharging a cold raw synthesis gas stream from the partial oxidation reactor,
- (h) a means for discharging a hot, liquid quench medium stream laden with solids particles from the partial oxidation reactor, a first heat exchanger, a means for introducing at least a portion of the hot quench medium stream into the first heat exchanger, wherein the first heat exchanger is selected from the group consisting of:
- (h1) crossflow heat exchangers configured such that the coolant is passed through tubes which have the hot quench medium stream flowing around them,
- (h2) shell and tube heat exchangers configured such that the coolant flows through the tube side and the hot quench medium stream flows through the shell side, and
- (h3) spiral heat exchangers,
- a means for supplying the carbon-containing input stream or the oxidant stream or the moderator stream or a plurality of these streams to the first heat exchanger as the first coolant,
- (j) a means for discharging the cold quench medium stream from the first heat exchanger and a means for recycling at least a portion of the cold quench medium stream to the cooling chamber.
Dependencies are inferred from the claim text.