PL215255B1 - Gas generator - Google Patents

Abstract

A gasifier includes a combustion chamber in which a combustible fuel is burned to produce a syngas and a particulated solid residue. A cooling chamber having a liquid coolant is disposed downstream of the combustion chamber. A dip tube is disposed coupling the combustion chamber to the cooling chamber. The syngas is directed from the combustion chamber to the cooling chamber via the dip tube to contact the liquid coolant and produce a cooled syngas. An asymmetric or symmetric liquid separator is disposed proximate to an exit path of the cooling chamber and configured to remove entrained liquid content from the cooled syngas directed through the annular passage to the exit path.

Description

The invention relates to a gas generator, more particularly a cooling chamber of a gas generator.

In a normal coal gasification process that burns particulate coal such as coal or coke or coal gas, the process is operated at relatively high temperatures and high pressures in a combustion chamber. When the injected fuel is burned or partially burned in the combustion chamber, the effluent is discharged through an opening in the lower end of the combustion chamber to a cooling chamber downstream of the combustion chamber. The cooling chamber contains a liquid coolant such as water. The medium flowing from the combustion chamber is brought into contact with the liquid coolant in the cooling chamber to reduce the temperature of the flowing medium. In some applications the cooling chamber may be used as a syngas quench chamber. In some other applications, the quench chamber may be used as a spray column to remove entrained solids from the synthesis gas produced. In some applications, the gas generator may include both a quench facility and a spray tower.

Known, for example from DE 3201732, a gas generator for gasification of coal comprises a combustion chamber in which combustible fuel is burned to produce syngas, a cooling chamber having a liquid coolant, located downstream of the combustion chamber, a dip tube connecting the combustion chamber to a cooling chamber and adapted to directing synthesis gas from the combustion chamber to a quench chamber for contact with a liquid coolant and for producing cooled synthesis gas, a suction tube surrounding the dip tube and defining an annular channel therebetween. When the fuel is a solid, such as coal or coke, the arrangement of the known gas generator allows the solid parts of the effluent as ash to be retained in the liquid reservoir of the cooling chamber and then removed as slag. The gaseous component of the effluent is discharged from the cooling chamber for further processing. However, the gaseous component usually carries with it a significant amount of liquid coolant as it passes through the cooling chamber. The minimum amount of liquid entrained in the effluent gas is not questioned for the overall process. However, excess liquid carried over from the cooling chamber and to downstream devices creates operational problems.

There is a need to improve a quench assembly for quench and spray tower applications adapted to remove a substantial amount of entrained liquid content from the gas flowing from the gas generator.

According to the invention, a gas generator comprising a combustion chamber in which combustible fuel is burned to produce synthesis gas, a cooling chamber having a liquid coolant located downstream of the combustion chamber, a dip tube connecting the combustion chamber to the cooling chamber and adapted to direct the synthesis gas from the combustion chamber into the combustion chamber. a cooling chamber for contact with a liquid coolant and for producing cooled syngas, the suction tube surrounding the dip tube and defining an annular channel therebetween, is characterized in that it comprises a liquid separator disposed adjacent the exit path of the cooling chamber and configured to remove entrained liquid content from the cooled liquid. syngas directed through the annular channel to the discharge path.

Preferably, the liquid separator is symmetrical or asymmetrical.

Preferably, the cooling chamber comprises a rapid cooling chamber for the gas generator.

The cooling chamber may include a spray column.

Preferably, the liquid separator comprises a deflector connected to a dip tube and configured to divert the cooled synthesis gas stream from the annular channel.

The liquid separator preferably includes a plurality of fins mounted on the deflector and adapted to remove entrained liquid content from the cooled synthesis gas directed through the annular channel to the discharge path.

The liquid separator may be a prismatic cone-shaped or a conical-circular one.

Preferably, the liquid separator includes a plurality of baffle members mounted on the separator and configured to remove entrained liquid contents from the cooled synthesis gas directed through the annular channel to the discharge path.

PL 215 255 B1

The liquid separator may include a channel between the partition members located adjacent to each other, the channel being configured to drain the removed entrained liquid.

These and other features, aspects and advantages of the present invention will become more apparent when the following detailed description is read with reference to the accompanying drawings, in which like numbers designate like parts throughout all of the drawings.

The invention is illustrated in the drawing examples in which Fig. 1 is a schematic representation of a gas generator having an exemplary cooling chamber with a liquid separator, according to an embodiment of the present invention; Fig. 2 is a schematic representation of a liquid separator according to an embodiment of the present invention; Fig. 3 is a schematic representation of a portion of a quench chamber having a liquid separator, according to an embodiment of the present invention; Fig. 4 is a schematic representation of a portion of a quench chamber having a liquid separator according to an embodiment of the present invention; Fig. 5 is a schematic representation of a portion of a quench chamber having a liquid separator, according to an embodiment of the present invention; Fig. 6 is a schematic representation of a portion of a quench chamber having a liquid separator, according to an embodiment of the present invention; Fig. 7 is a schematic representation of a rib pattern according to an embodiment of the present invention; Fig. 8 is a schematic representation of a rib pattern according to an embodiment of the present invention; Fig. 9 is a schematic representation of a rib arrangement according to an embodiment of the present invention; Fig. 10 is a schematic representation of a portion of a quench chamber having a liquid separator with a single row of fin array, according to an embodiment of the present invention; Fig. 11 is a schematic representation of a portion of a quench chamber having a liquid separator with a multi-row fin array, according to an embodiment of the present invention; Fig. 12 is a schematic representation of a portion of a quench chamber having a liquid separator with an oblique arrangement of ribs along a row, according to an embodiment of the present invention; Fig. 13 is a schematic representation of a liquid separator with a stepped pattern of fins, according to an embodiment of the present invention; Fig. 14 is a schematic representation of a spray column having a liquid separator, according to an embodiment of the present invention; Fig. 15 is a schematic representation of a prismatic or circular liquid separator, according to an embodiment of the present invention; Fig. 16 is a schematic representation of an angular liquid separator, according to an embodiment of the present invention; Fig. 17 is a schematic representation of a circular liquid separator, according to an embodiment of the present invention.

In accordance with an embodiment disclosed herein, a gas generator 10 is provided having a cooling chamber assembly 16 adapted to reduce the temperature of the syngas downstream of the combustion chamber 14. The gas generator 10 includes a cooling chamber 16 containing a liquid coolant located downstream of the combustion chamber 14. Syngas generated in the combustion chamber 14. Combustion 14 is directed through dip tube 38 into cooling chamber 16 to contact liquid coolant 32 and produce cooled syngas. The gas generator 10 includes a submersible pipe 38 connecting the combustion chamber 14 to the cooling chamber 16 and is adapted to direct synthesis gas from the combustion chamber 14 to the cooling chamber 16 to contact liquid coolant 32 and to generate synthesis gas. A suction tube 46 is positioned around dip tube 38 and defines an annular channel 50 therebetween. A liquid separator 62 is located adjacent to the outlet path 52 from the cooling chamber 16 and is adapted to remove the entrained liquid content from the cooled synthesis gas directed through the annular channel 50 into the path. outlet 52. In one embodiment, the liquid separator 62 is a symmetrical liquid separator. In another embodiment, the liquid separator 62 is an asymmetric liquid separator. In some embodiments, cooling chamber 16 is used in quench cooling applications. In certain other embodiments, cooling chamber 16 is used in spray column applications. The cooled syngas is directed through the annular channel 50 and impinges on the liquid separator 62 to remove the entrained liquid content from the cooled syngas before the cooled syngas is directed through the exhaust path 52. The assembly used to achieve entrainment removal is herein referred to as " liquid separator ". The liquid separator can be an assembly or a single element. In some embodiments, the liquid separator includes a finned deflector connected to a dip tube. In other embodiments, the liquid separator is a conical, prismatic, or circular separator. The use of an exemplary liquid separator significantly reduces

Entrainment of the liquid content in the synthesis gas directed through the outlet path to the downstream devices. Specific embodiments are discussed in more detail below with reference to Figures 1-15.

With reference to Fig. 1, an exemplary gas generator 10 is disclosed. The gas generator 10 comprises an outer shell 12 housing a combustion chamber 14 at the upper end and a cooling chamber 16 at the lower end. Combustion chamber 14 includes a refractory wall 18 capable of withstanding normal operating temperatures. A burner 20 is connected via path 22 to a fuel source 24. A fuel stream, including pulverized carbonaceous fuel such as coal, coke, or the like, is fed into the combustion chamber through a burner 20, removably mounted on the top wall of the combustion chamber 14. The burner 20 is then connected to the combustion chamber. through path 26 to a combustion promoting gas source 28 adapted to supply a gas such as oxygen or air.

Combustible fuel is burned in combustion chamber 14 to produce a effluent containing synthesis gas and the remainder as particulate matter. The hot effluent is fed from the combustion chamber 14 to a cooling chamber 16 at the lower end of the outer shell 12. A cooling chamber 16 is connected to a pressure source 30 and adapted to supply a reservoir of liquid coolant 32, preferably water, to the cooling chamber 16. Level liquid coolant in the reservoir of cooling chamber 16 is maintained at the desired height to ensure efficient operation depending on the conditions of the fluid flowing from the combustion chamber 14 to the cooling chamber 16. The lower end of the shell 12 of the gas generator includes an outlet 34 through which water and fine particles are removed from cooling chamber 16 as a sludge.

In the illustrated embodiment, the constricted portion 36 of the combustion chamber 14 is connected to the cooling chamber 16 via a dip tube 38. The hot effluent is fed from the combustion chamber 14 to the liquid coolant 32 in the cooling chamber 16 through the duct 40 of the dip tube 38. Ring 42 it is located adjacent to dip tube 38 and connected to pressure source 30 so as to keep the inner wall of the dip tube wetted to best accommodate the downward flow of the fluid flowing out. The lower end 44 of the dip tube 38 may be serrated and located below the surface of the liquid coolant 32 to efficiently cool the effluent.

The suction tube 46 is disposed in the cooling chamber 16. The suction tube 46 comprises an elongated cylindrical body 48 permanently supported in the shell 12 of the gas generator. The lower portion of the suction tube 46 is immersed in the liquid coolant 32. The cylindrical body 48 terminates proximate but some distance at its upper end from the ring 42. The cylindrical body 48 is also spaced from the dip tube 38 to define an annular channel 50. Syngas. it contacts liquid coolant 32 to produce chilled syngas. The cooled syngas is then passed through the annular channel 50 towards the exhaust path 52 of the cooling chamber 16.

As discussed above, the gaseous component of the effluent is discharged for further processing through the outlet path 52 from the cooling chamber 16. In the illustrated embodiment, cooling chamber 16 is a quench chamber. In certain other embodiments, the quench chamber is a spray tower adapted to remove entrained solids from the synthesis gas. However, it is known from conventional solutions that the gaseous component will carry with it a significant amount of liquid coolant as it passes through the quench chamber. It has been found that excess liquid transferred from the cooling chamber to downstream devices presents problems of an operational nature.

In the illustrated embodiment, a liquid separator 54 is disposed in the cooling chamber 16 proximate the outlet path 52. It should be noted herein that in the illustrated embodiment, the liquid separator 54 is a symmetrical liquid separator. The liquid separator 54 includes a deflector 56 connected to a dip tube 38 and adapted to redirect the flow of cooled syngas from the annular channel 50 downward. In the illustrated embodiment, the deflector 56 may be spherical. In other embodiments, other deflector shapes are also provided. Deflector 56 has multiple fins 58. The cooled syngas redirected through deflector 56 is forced to flow through a series of blockages, in other words, ribs 58. As a result, the syngas flow momentum is dissipated and the available flow area is used more efficiently. The syngas flow is split more evenly at the outlet of deflector 56. During normal rapid cooling, the chilled gas stream will carry some

Amount of coolant liquid. However, as the cooled gas stream impinges on the deflector 56 and ribs 58, the syngas flow rate is reduced and the entrained liquid content is removed from the syngas. The deflector 56 also prevents the liquid coolant 32 from moving into the outlet path 52 of the cooling chamber 16.

In the illustrated embodiment, the deflector 56 may include a plurality of openings 57 for directing a portion of the cooled syngas into the pre-deflector 56 in the quench chamber 16. This helps to improve syngas flow uniformity and also helps reduce liquid entrainment by syngas. In some embodiments, deflector 56 may use openings 57 and may not have ribs 58. It should be noted herein that the illustrated gas generator 10 is an exemplary embodiment, and other gas generator configurations are also envisaged. It should be noted herein that the term "cooling chamber" will refer to a quench plant or spray tower regardless of the configuration of the gas generator. Other embodiments of the liquid separator are discussed below with reference to the following figures.

With reference to Fig. 2, a liquid separator 54 is disclosed. As discussed above, liquid separator 54 is located proximate the exit path of the cooling chamber. The liquid separator 54 includes a spherical deflector 56 connected to a dip tube 38 and is adapted to redirect the cooled synthesis gas stream from the annular conduit 50 between the dip tube 38 and the suction tube 46 in a downward direction. There are a plurality of ribs 58 on the deflector 56. In the embodiment shown in Fig. 2, the deflector 56 includes ten ribs 58. The ribs 58 are arranged along a circular direction 60. As the cooled gas stream impinges on the deflector 56 and the ribs 58, the syngas flow momentum is degraded. dispersion and the flow rate is reduced, causing the entrained liquid content to be removed from the synthesis gas.

Referring to Fig. 3, a portion of a quench chamber 16 is disclosed. A liquid separator 62 is disposed adjacent the outlet path 52 in the cooling chamber 16. In the embodiment shown in FIG. 3, the liquid separator 62 is a symmetrical liquid separator. The liquid separator 62 includes an elliptical deflector 64 connected to a dip tube 38 and is adapted to redirect the cooled synthesis gas stream from the annular channel 50 between the dip tube 38 and the suction tube 46 downwardly.

Referring to Fig. 4, a portion of a quench chamber 16 is disclosed. A liquid separator 66 is disposed adjacent the outlet path 52 in the cooling chamber 16. In the embodiment shown in FIG. 4, the liquid separator 66 is a symmetrical liquid separator. The liquid separator 66 includes a rectangular deflector 68 connected to a dip tube 38 and is adapted to redirect the cooled syngas stream from the annular channel 50 between the dip tube 38 and the suction tube 46 downwardly.

Referring to Fig. 5, a portion of a quench chamber 16 is disclosed. A liquid separator 67 is disposed adjacent the outlet path 52 in the cooling chamber 16. In the illustrated embodiment, the liquid separator 67 is an asymmetric liquid separator. The liquid separator 67 includes a deflector 69 connected to a dip tube 38 and is adapted to redirect the cooled synthesis gas stream from the annular channel 50 between the dip tube 38 and the suction tube 46 downward.

Referring to Fig. 6, a portion of a quench chamber 16 is disclosed. A liquid separator 70 is disposed adjacent the outlet path 52 in the cooling chamber 16. The liquid separator 70 is a symmetrical liquid separator. The liquid separator 70 includes a trapezoidal deflector 72 connected to a dip tube 38 and is adapted to redirect the flow of cooled syngas from the annular channel 50 between the dip tube 38 and the suction tube 46 downward.

Referring to Fig. 7, a plurality of ribs 74 are disclosed attached to a deflector (not shown). In the embodiment shown in Fig. 7, the ribs 74 are straight ribs arranged in a polygon shape.

Referring to Fig. 8, a plurality of ribs 76 are disclosed attached to a deflector (not shown). In the embodiment shown in Fig. 8, the ribs 76 are curved ribs arranged in a circle.

Referring to Fig. 9, a plurality of ribs 78 are disclosed attached to a deflector (not shown). In the embodiment shown in Fig. 9, one set of ribs 78 may be

The other set of ribs 78 may be located along the tangential direction 82.

Referring to Fig. 10, a portion of a quench chamber 16 according to the embodiment shown in Fig. 1 is disclosed. Liquid separator 54 includes a spherical deflector 56 connected to submerged tube 38 and is adapted to redirect cooled synthesis gas flow from annular channel 50 between dip tube 38 and downward suction tube 46. Deflector 56 includes a plurality of ribs 58. In the illustrated embodiment, ribs 78 extend along a single row.

Referring to Fig. 11, a portion of a cooling chamber 16 according to the embodiment shown in Fig. 1 is disclosed. In the illustrated embodiment, a plurality of ribs 58 are seated on the deflector 56 and extend along a plurality of rows.

Referring to Fig. 12, a portion of a cooling chamber 16 according to the embodiment shown in Fig. 1 is disclosed. In the illustrated embodiment, a plurality of ribs 58 are seated on the deflector 56 and extend obliquely along the row.

With reference to Fig. 13, a liquid separator 84 is disclosed. In the illustrated embodiment, the liquid separator 84 includes two sets of ribs 86,88 mounted on the deflector 90. The two sets of ribs 86,88 are disposed along two rows along the circular direction respectively. In one embodiment, the set of ribs 86 along one row is staggered with respect to the set of ribs 88 of the second row.

Referring to Fig. 14, an exemplary cooling chamber 85 is disclosed. In the illustrated embodiment, the cooling chamber is a spray tower. A suction tube 87 is positioned around a dip tube 89 in a cooling chamber 85. The lower portion of the suction tube 87 is immersed in the liquid coolant 91. An annular channel 93 is formed between the suction tube 87 and the dip tube 89. Syngas contacts the liquid coolant 91 to cool it and remove entrained liquid content from the synthesis gas.

In the embodiment shown in Fig. 14, liquid separator 95 is positioned proximate to the outlet of annular channel 93. Liquid separator 95 includes a deflector 97 connected to submerged tube 89 and adapted to redirect the cooled synthesis gas stream from annular channel 93 downward. A plurality of ribs (not shown) may be attached to the deflector 97. The cooled syngas redirected through the deflector 97 may be forced to flow through a series of fins. As a result, the syngas flow momentum is dissipated and the available flow area is used more efficiently. The syngas then flows through the space 99 between the suction tube 87 and the wall 101 of the cooling chamber 85 in an upward direction and is discharged from the upper side.

In accordance with the embodiments discussed herein, the use of a deflector, fins, or combinations thereof, helps to reduce the flow rate of the cooled syngas and also increases the gas flow path distance between the liquid coolant and the exit path of the cooling chamber. This causes an increased residence time of the mixture of gas and liquid coolant in the quench chamber leading to improved removal of entrained liquid content from the cooled synthesis gas. In general, the deflector and the ribs can create a tortuous path for the syngas flow inside the cooling chamber.

Referring to Figs. 1-14, it should be noted herein that the shape of the deflector may vary depending on the application. The number, shape and arrangement of the ribs can be varied and optimized depending on the application. Various permutations and combinations of the various embodiments discussed above may also be envisaged.

With reference to Fig. 15, a cooling chamber 92 has been disclosed. In the embodiment shown in Fig. 15, a suction tube 94 is positioned around a dip tube 96 in a cooling chamber 92. The cooled syngas passes through an annular channel 98 formed between the dip tube 96 and the tube. suction 94 toward the exit path 100 of cooling chamber 92. A liquid separator 102 is positioned adjacent the discharge path 100 and around dip tube 96 and suction tube 94 in cooling chamber 92. Syngas is cooled by liquid coolant 104 in cooling chamber 92. Liquid separator 102 can be a square or circular separator. In the embodiment shown in Fig. 15, the liquid separator 102 is a conical shaped liquid separator. In one embodiment, the liquid separator 102 may be an asymmetric liquid separator. In another embodiment, the liquid separator 102 may be

PL 215 255 B1 with a symmetrical liquid separator. The liquid separator is explained in more detail with reference to the following figures.

Referring to Fig. 16, a liquid separator 102 according to the embodiment shown in Fig. 15 is disclosed. In the illustrated embodiment, separator 102 is a symmetrical prismatic separator. The separator 102 shown in the drawing includes a plurality of v-shaped baffle elements 105 and a plurality of v-shaped baffle elements 106 supported on the baffle plates 105. The baffle elements 106 align with channels 108 formed between the baffle elements 106. The baffle elements 106 define a flow area along a radial direction in the drawing. separator 102. A tube 110 is connected to each conduit 108. Cooled synthesis gas exiting the annular passage between the dip tube and the suction tube is directed through the separator 102. The cooled synthesis gas is directed against the inner walls of the splash plates 105 by inertial forces. The baffle members 106 are adapted to separate the liquid content from the cooled syngas. In other words, as a result of the converging flow area in separator 102, the syngas flow will be stratified due to the difference in density between liquid and gas. The gas phase is moved inward along the radial direction in the separator 102 due to flow stratification. The liquid content will tend to coalesce on the baffle members 106. The removed entrained liquid content is drained through channels 108 into the pipes 110 and then directed to a cooling chamber. In some embodiments, the barrier members 106 may be seated perpendicular to the surface of the impact plates 105. In some other embodiments, the barrier members 106 may be at an upward angle to the surface of the impact plates.

In accordance with the embodiments discussed herein, the use of the splash plates 105 and baffle members 106 helps to reduce the flow rate of cooled syngas and also increase the distance of the gas flow path between the liquid coolant and the exit path from the cooling chamber. This causes an increased residence time of the mixture of gas and liquid coolant in the quench chamber leading to improved removal of entrained liquid content from the cooled synthesis gas. The amount of entrained liquid in the synthesis gas exiting separator 102 is reduced because the radial velocity is less than the axial velocity of the synthesis gas flow. Generally, the spatter plates 105 and the baffle elements 106 can form a tortuous path for the synthesis gas to flow inside the cooling chamber. The separator also prevents the synthesis gas from re-entraining the liquid content.

Referring to Fig. 17, a liquid separator 112 with a round plate 114 is disclosed. In the embodiment shown in Fig. 17, the separator 112 is an asymmetric liquid separator. The illustrated liquid separator 112 includes a plurality of v-shaped baffle members 116. The baffle members 116 are tapered to the channels 118 formed between the baffle members 116. It should be noted here that the baffle members 116 are not evenly spaced throughout the circular liquid separator 112. The baffle members 116 limit the flow areas along a radial direction in the separator 112. A tube 120 is connected to each conduit 118.

The liquid entrainment reducing mechanisms shown in Figs. 1-17 may be used separately or in combination with each other. In addition, the relative sizes, shapes, and geometries of the mechanisms to reduce liquid entrainment may vary. While some embodiments use symmetrical geometries for a liquid separator, it should be noted herein that asymmetric designs may also be used in certain applications. For example, by removing one or more ribs from a given system, cost savings can be achieved while maintaining the functionality of the liquid separator. Liquid entrainment reduction mechanisms may be used in the quench chamber during initial manufacture, or liquid entrainment reducing mechanisms may be installed later on to existing cooling assemblies and / or spray columns. In addition, the anti-entrainment reducing mechanisms can be adjusted based on operational parameters such as type of coal fuel, system performance, system load, or environmental conditions, inter alia, to achieve improved system operation and control.

The present specification discloses the invention through the best embodiments to enable any person skilled in the art to practice the invention, including making and

Using any device or installation and performing any associated manner. The patentable scope of the invention is defined in the claims and may include other examples that will occur to those skilled in the art. Such other examples are considered to fall within the scope of the claims if they have constructional features that do not differ from the literal wording of the claims, or if they have equivalent constructional features with negligible variations from the literal wording of the claims.

While only certain features of the invention have been illustrated and described herein, many modifications and variations will occur to those skilled in the art. Therefore, it is understood that the appended claims are intended to cover all such modifications and variations that fall within the true spirit of the present invention.

Claims (11)

1.A gas generator, comprising a combustion chamber in which combustible fuel is burned to produce syngas, a cooling chamber having a liquid coolant located downstream of the combustion chamber, a dip tube connecting the combustion chamber to the cooling chamber and adapted to direct the synthesis gas from the combustion chamber to the chamber a suction tube surrounding the dip tube and defining an annular channel therebetween, characterized by a liquid separator (54, 62, 66, 67, 70, 84, 95, 102, 112). ) located proximate the outlet path (52, 100) of the quench chamber (16, 85, 92) and configured to remove entrained liquid content from the cooled synthesis gas directed through the annular channel (50, 93, 98) to the outlet path (52,100). 2. Gas generator according to claim The method of claim 1, characterized in that the liquid separator (54, 62, 66, 70, 84, 95, 102) is symmetrical. 3. The gas generator according to claim The method of claim 1, wherein the liquid separator (67, 112) is asymmetric. 4. Gas generator according to claim 1 The process of claim 2 or 3, characterized in that the cooling chamber (16) comprises a rapid cooling chamber of the gas generator (10). 5. The gas generator according to claim 1 A process as claimed in claim 2 or 3, characterized in that the cooling chamber (16) comprises a spray column. 6. The gas generator according to claim 1 The method of claim 2 or 3, characterized in that the asymmetric or symmetrical liquid separator (54, 62, 66, 67, 70, 84, 95, 102) comprises a deflector (56, 64, 68, 69, 72, 90, 97) connected to a dip tube ( 38,89) and configured to divert the cooled syngas stream out of the annular channel (50,93). 7. Gas generator according to claim 1 The method of claim 6, characterized in that the liquid separator (54) comprises a plurality of ribs (58, 74, 76, 78, 86, 88) mounted on the deflector (56, 84) and adapted to remove entrained liquid content from the cooled synthesis gas directed through the annular channel (50, 93) to the discharge path (52). 8. The gas generator according to claim 1 The method of claim 2, 3 or 6, characterized in that the liquid separator (102) is a conical prismatic separator. 9. The gas generator according to claim 1 The liquid separator (112) as claimed in claim 2, 3 or 6, characterized in that the liquid separator (112) is a circular conical separator. 10. Gas generator according to claim 1 The method of claim 8 or 9, characterized in that the liquid separator (102, 112) includes a plurality of baffle members (106, 114) mounted on the separator and configured to remove entrained liquid content from the cooled synthesis gas directed through the annular channel to the outlet path (100). 11. The gas generator as claimed in claim 1, The method of claim 10, characterized in that the liquid separator (102, 112) comprises a channel (108, 118) between the baffle members (106, 114) adjacent to each other, the channel (108, 118) being configured to discharge the removed entrained liquid.