JP2010106132A - Solid fuel gasification burner and gasification furnace equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid fuel gasification burner which suppresses the occurrence of a high-temperature region in a chip member of the solid fuel gasification burner and in a wall material of a gasification furnace near the burner chip, so that safe operation of the gasification furnace is enabled. <P>SOLUTION: The solid fuel gasification burner includes: a solid fuel carrier pipe forming a solid fuel passage which passes a mixed fluid of solid fuel and carrier gas and spurts it into a gasification furnace; a gasifying agent carrier pipe disposed within the solid fuel carrier pipe and forming a gasifying agent passage which passes a gasifying agent and spurts it into the gasification furnace; an outer casing pipe disposed outside the solid fuel carrier pipe and forming a cooling medium passage with an annular section which passes a cooling medium; a cooling medium inlet pipe connected to the outer casing pipe to introduce the cooling medium into the cooling medium passage; and a cooling medium outlet pipe connected to the outer casing pipe to discharge the cooling medium from the cooling medium passage. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention supplies gas such as coal and finely pulverized solid fuel containing carbon and hydrogen to a gasification furnace as a mixed fluid with a carrier gas, and generates a combustible gas by partial combustion caused to react with a gasifying agent. The present invention relates to a solid fuel gasification burner installed in a gasification furnace and a gasification furnace equipped with the solid fuel gasification burner.

  There are three main types of gasifiers. That is, the structure forming the inside of the gasification reaction part of the gasification furnace can be divided into a fixed bed, a fluidized bed, and a spouted bed (or airflow bed).

  Among these three types of gasification furnaces, the spouted bed is a space in the gasification furnace, into which fuel and gasification agent containing carbon and hydrogen are ejected from the burner, and the gasification furnace space A high-temperature combustible gas mainly composed of carbon monoxide and hydrogen is generated by a gasification reaction in which a fuel and a gasifying agent are partially burned.

  There are two main methods for supplying solid fuel such as coal to a gasification furnace having a gas flow layer configuration. That is, a dry supply method and a wet supply method.

  The dry supply method for supplying solid fuel is a method in which solid fuel is pulverized, transported through a pipeline with a flow of transporting gas such as nitrogen or air, and supplied to the gasifier.

  On the other hand, the wet supply method for supplying the solid fuel is a method in which the solid fuel is finely pulverized and then mixed with water to form a slurry, which is transported through a pipe via a pump or the like and supplied to the gasifier.

  In the case of the wet supply method, since the solid fuel and water are supplied, the heat generated by partial combustion of the solid fuel by the gasifying agent is consumed by the evaporation of water, so the flame temperature is low.

  On the other hand, in the case of the dry supply method, since there is no heat of evaporation due to water, the flame temperature becomes high.

  As a dry feed type burner, Japanese Patent Application Laid-Open No. 60-243195 discloses a solid fuel having a structure in which a solid fuel is circulated together with a carrier gas in a central conduit of the burner and a gasifying agent is circulated in an outer conduit. A gasification burner is disclosed.

  The gasification furnace is filled with high-temperature combustible gas such as carbon monoxide and hydrogen generated by the gasification reaction by partial combustion in which the fuel and the gasifying agent are reacted.

  By the way, when the gasifying agent supplied from the burner into the gasification furnace comes into contact with the combustible gas and burns, there is a possibility that a high temperature region is generated near the tip of the burner of the solid fuel gasification burner.

  When the gasifying agent comes into contact with the combustible gas and burns to generate a high-temperature region near the burner tip, deformation, cracking, or melting occurs in the burner tip member or the wall material of the gasifier near the burner tip. The possibility increases.

  Further, as another burner structure of the dry feed type solid fuel gasification burner, in FIG. 16 of Japanese Patent Laid-Open No. 09-157664, a gasifying agent is circulated through a central pipeline, and is conveyed to a pipeline outside thereof. A solid fuel gasification burner having a structure in which a solid fuel is circulated together with a gas is disclosed.

  In the case of the burner structure described above, the contact between the gasifying agent and the combustible gas in the gasifier is suppressed by injecting solid fuel outside the gasifying agent. Combustion due to contact with can be suppressed.

  In the burner structure, for the purpose of mixing the solid fuel and the gasifying agent after injection from the burner in order to improve the ignitability, the tip of the solid fuel flow path formed in the solid fuel gasification burner is the inner axis. It has a slanted structure.

JP 60-243195 A JP 09-157664 A

  However, in the burner structure disclosed in Japanese Patent Laid-Open Nos. 60-243195 and 09-157664, there is no problem of ignitability when the oxygen concentration in the gasifying agent is high. However, there is a problem that a high temperature region is likely to occur near the tip of the burner due to the proximity of the tip of the burner.

  For this reason, in the burner structure, when a high-temperature region is generated near the burner tip, the gasifier furnace wall member near the burner tip member or the burner installation location may be deformed, cracked, or melted. High nature.

  Further, in the burner structure disclosed in Japanese Patent Application Laid-Open No. 09-157664, since the solid fuel and the carrier gas flow through the doughnut-shaped pipes, the solid fuel is not transported at a uniform concentration. There is a possibility that the density of the gasification and the solid fuel may locally collapse, and a high temperature region may be partially generated.

  In this case, in the region where the concentration of the solid fuel is low, oxygen in the gasifying agent becomes excessive, and the temperature rises as the fuel rate increases.

  Conversely, in a region where the concentration of the solid fuel is high, oxygen is insufficient, and the fuel rate is lowered and the temperature is lowered.

  And when a high temperature area | region generate | occur | produces locally, possibility that the burner front-end | tip member of the vicinity and the gasification furnace wall surface material of the burner installation location vicinity will deform | transform, a crack generate | occur | produces, or fuse | melts is high.

  Therefore, in the solid fuel gasification burner having the above-described configuration, the burner is burned by the contact between the combustible gas mainly composed of carbon monoxide and hydrogen filled in the gasification furnace and the gasifying agent supplied to the gasification burner. By generating a high temperature region near the tip, or by generating a high temperature region in which the ratio of the gasifying agent and the solid fuel is locally collapsed due to variations in the concentration of the solid fuel supplied to the solid fuel gasification burner, There is a possibility that problems such as thermal deformation, cracking, or melting may occur in the tip member of the burner or the wall material of the gasification furnace near the tip of the burner.

  It is an object of the present invention to provide a solid fuel that enables a safe operation of a gasification furnace by suppressing problems caused by the occurrence of a high temperature region in the tip member of the solid fuel gasification burner and the wall material of the gasification furnace near the tip of the burner. An object of the present invention is to provide a gasification burner and a gasification furnace equipped with the solid fuel gasification burner.

  The solid fuel gasification burner of the present invention supplies a solid fuel containing carbon and hydrogen such as coal to a gasification furnace as a mixed fluid with a carrier gas, reacts with a gasifying agent, and partially burns to gasify In the solid fuel gasification burner installed in the gasification furnace, the solid fuel gasification burner forms a solid fuel flow path that circulates a mixed fluid of the solid fuel and the carrier gas and ejects it to the gasification furnace. A fuel transfer pipe, a gasification agent transfer pipe disposed on an inner peripheral side of the solid fuel transfer pipe to form a gasification agent flow path through which the gasification agent is circulated and ejected to the gasification furnace; and the solid fuel transfer An outer cylinder tube that is disposed on the outer peripheral side of the pipe and in which a flow passage for circulating the cooling medium forms an annular cooling medium passage, and cooling that is connected to the outer cylinder pipe and introduces the cooling medium into the cooling medium passage A medium inlet pipe, and a cooling medium connected to the outer cylinder pipe. And a cooling medium outlet pipe be derived from, characterized in that it comprises a.

  Moreover, the gasification furnace provided with the solid fuel gasification burner of the present invention is a gasification furnace in which the solid fuel gasification burner distributes a mixed fluid of solid fuel containing carbon and hydrogen such as coal and a carrier gas. A solid fuel transfer pipe that forms a solid fuel flow path to be ejected into the gas, and a gasifying agent flow path that is disposed on the inner peripheral side of the solid fuel transfer pipe and that circulates the gasifying agent and jets it to the gasification furnace A gasifying agent conveying pipe, an outer cylinder pipe which is disposed on the outer peripheral side of the solid fuel conveying pipe and in which a flow passage for circulating the cooling medium forms an annular cooling medium flow path, and is connected to the outer cylindrical pipe for cooling. The solid fuel gas includes a cooling medium inlet pipe that introduces the medium into the cooling medium flow path, and a cooling medium outlet pipe that is connected to the outer cylinder pipe and that extracts the cooling medium from the cooling medium flow path. A plurality of gasification burners are installed in the gasification furnace, and these solid fuel gasification burners are used. Characterized in that the feeding solid fuel and a gasifying agent and configured to generate a combustible gas by partial combustion in the gasification furnace.

According to the present invention, the tip member of the solid fuel gasification burner and the wall of the gasification furnace near the tip of the burner
It is possible to realize a solid fuel gasification burner that suppresses problems caused by the occurrence of a high temperature region in the face material and enables safe gasification furnace operation, and a gasification furnace equipped with this solid fuel gasification burner.

  Embodiments of a solid fuel gasification burner and a gasification furnace equipped with a solid fuel gasification burner according to the present invention will be described below with reference to the drawings.

  A solid fuel gasification burner according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a cross-sectional view of a solid fuel gasification burner according to a first embodiment of the present invention, and FIG. 2 is a view of the solid fuel gasification burner according to the first embodiment shown in FIG. is there.

  FIG. 3 is a longitudinal sectional view of the solid fuel gasification burner of the first embodiment shown in FIG. 1, and FIG. 4 is a calculation of the flame temperature distribution in the solid fuel gasification burner of the first embodiment shown in FIG. It is an example of a result.

  FIG. 5 shows a solid fuel gasification burner according to the first embodiment shown in FIGS. 1 to 3 and a solid fuel gasification burner according to a second embodiment shown in FIGS. It is an actual measurement example which shows the standard deviation of the circumferential direction density | concentration of the solid fuel in the burner front-end | tip part at the time of changing the conveyance state.

  As shown in FIGS. 1 to 5, the solid fuel gasification burner 20 according to the embodiment of the present invention is surrounded on the outer peripheral side by a cylindrical outer tube 1. A plurality of flow paths formed by a plurality of ducts are configured.

  Of the plurality of flow paths formed inside the outer tube 1 of the solid fuel gasification burner 20, an annular cooling medium flow path 11 for circulating and circulating the cooling medium is disposed on the outermost periphery, A cooling medium inlet pipe 41 having a cooling medium inlet 31 for introducing the cooling medium into the cooling medium flow path 11 at the end opposite to the tip of the cooling medium flow path 11, and the introduced cooling medium through the cooling medium flow A cooling medium outlet pipe 42 having a cooling medium outlet 32 led out from the passage 11 is connected to the outer tube 1.

  An annular tip member 2 is installed at the tip of the annular coolant flow path 11 which is the tip of the solid fuel gasification burner 20, and the coolant flow path 11 is closed. The solid fuel gasification burner 20 is cooled by swirling and circulating cooling water or water vapor serving as a cooling medium in the interior of 11.

  A cylindrical partition member 12 is disposed concentrically along the longitudinal direction of the outer tube 1 inside the cooling medium flow path 11 provided in the outer tube 1 so as to be spaced from the tip member 2. The annular cooling medium flow path 11 is arranged on the inner peripheral side of the partition member 12 communicating with the cooling medium inlet pipe 41 along the longitudinal direction of the solid fuel gasification burner 20 by the installation of the partition member 12. The flow path 11a is partitioned into a second cooling flow path 11b which is the outer peripheral side of the partition member 12 communicating with the cooling medium outlet pipe 42.

  The cooling medium introduced from the cooling medium inlet pipe 41 is swung through the first cooling flow path 11a which is an annular cooling medium flow path 11 partitioned on the inner peripheral side of the partition member 12, and the distal end portion of the outer tube 1 The second cooling flow path 11b, which is an annular cooling medium flow path 11 that is flown down to the tip of the cooling medium flow path 11 and then reversed on the outer peripheral side of the partition member 12 by reversing the flow direction of the cooling medium. While turning, the refrigerant is led to the cooling medium outlet pipe 42 installed at the end of the outer cylindrical pipe 1 and led out to the outside.

  By disposing the annular cooling medium flow path 11, the tip member 2 provided at the tip of the solid fuel gasification burner 20 is effectively cooled.

  Of the plurality of flow paths formed inside the outer cylindrical pipe 1 of the solid fuel gasification burner 20, the solid fuel is adjacent to the cooling medium pipe 11 inside the outermost cooling medium pipe 11. In addition, a solid fuel transfer pipe 3 for circulating a mixed fluid with the transfer gas is installed, and a linear solid fuel flow path 13 is formed inside the solid fuel transfer pipe 3.

  As the solid fuel, a pulverized solid fuel containing carbon and hydrogen such as coal is used, and this solid fuel is used as a mixed fluid with a carrier gas having an oxygen content of 1% or less. A straight solid fuel flow path 13 formed inside 3 is flowed down and supplied into the gasification furnace.

  A solid fuel inlet pipe 43 for introducing solid fuel into the solid fuel flow path 13 is connected to the end of the solid fuel transfer pipe 3.

  A solid fuel containing carbon and hydrogen such as coal finely pulverized into the solid fuel flow path 13 is supplied from the solid fuel inlet pipe 43 as a mixed fluid with a carrier gas having an oxygen content of 1% or less.

  A solid fuel injection hole 23 is formed at the tip of the solid fuel flow path 13 which is the tip of the solid fuel gasification burner 20, and the solid fuel that has become a mixed fluid is jetted from the solid fuel injection hole 23 to form a gas. It is being supplied into the furnace.

  As a method of connecting the solid fuel transfer pipe 3 and the solid fuel inlet pipe 43, the center line of the solid fuel transfer pipe 3 that forms the solid fuel flow path 13 therein and the circular pipe that constitutes the solid fuel inlet pipe 43 are used. Connect them so that the centerlines do not cross each other.

  By connecting the solid fuel transport pipe 3 and the solid fuel inlet pipe 43 in this way, the mixed fluid of the solid fuel and the transport gas supplied from the solid fuel inlet 43 together with the transport gas is a gasifying agent to be described later. A solid fuel injection hole 23 formed at the tip of the solid fuel flow path 13 while flowing down in the solid fuel flow path 13 formed in the outer peripheral side of the transport pipe 4 while turning in the solid fuel flow path 13 having an annular donut shape. It is conveyed in the direction of. The shape of the solid fuel inlet pipe 43 may be not only a circular pipe but also a rectangular flow path.

  A linear gasifying agent transport pipe 4 for circulating a gasifying agent is disposed at the center of the solid fuel gasification burner 20 inside the solid fuel flow path 13. Gasification formed at the front end of the gasification agent transport pipe 4 by circulating a gasification agent which is a gas having a higher oxygen content than air through a linear gasification passage 14 formed inside A gasifying agent is ejected from the agent ejection hole 24 and supplied into the gasification furnace.

  As the gasifying agent, air containing 20% or more of oxygen or pure oxygen is used.

  An annular solid fuel passage 13 and a linear gasifying agent passage 14 formed inside the solid fuel gasification burner 20 are formed substantially in parallel along the longitudinal direction of the solid fuel gasification burner 20, The solid fuel and the carrier gas flow down while swirling in the annular solid fuel flow path 13, and the solid fuel ejected from the solid fuel injection hole 23 at the tip, and the straight gasifier flow path 14 flow down to the tip. The gasification agent ejected from the gasification agent ejection holes 24 of the part is supplied as a parallel flow into the gasification furnace.

  The solid fuel and the gasifying agent jetted from the front end of the solid fuel gasification burner 20 are jetted into the gasification furnace as a substantially parallel flow, and the solid fuel and the gasifying agent are mixed in the gasification furnace space. A combustible gas having a high temperature of 2000 ° C. to 2500 ° C. mainly composed of carbon monoxide and hydrogen is generated by a gasification reaction by partial combustion, and the gasification furnace is filled with an atmosphere gas of 1000 ° C. to 1800 ° C.

  In the case of the solid fuel gasification burner 20 of the present embodiment having the configuration shown in FIGS. 1 to 5, the solid fuel flow path 13 and the gasifying agent flow path 14 formed in the solid fuel gasification burner 20 are solid. Since the fuel gasification burner 20 is formed in parallel with the longitudinal direction of the fuel gasification burner 20, the solid fuel ejected from the solid fuel ejection hole 23 at the tip of the solid fuel flow channel 13 and the tip of the gasification agent flow channel 14 are formed. The gasifying agent ejected from the gasifying agent ejection hole 24 is supplied into the gasification furnace as a parallel flow.

  As a result, the gasifying agent and the solid fuel jetted into the gasification furnace are prevented from mixing and burning near the burner tip of the solid fuel gasification burner 20, and the burner tip member and the burner tip vicinity. It is possible to suppress problems such as deformation, cracking, or melting of the tip member of the burner or the wall material of the gasification furnace due to the local occurrence of a high temperature region in the wall material of the gasification furnace.

  On the other hand, FIG. 9 shows the flame temperature distribution in the burner when an annular gasifying agent passage is formed on the outer peripheral side of the solid fuel passage.

  According to the solid fuel gasification burner 20 of the present embodiment, the solid fuel and the gasifying agent are injected into the gas furnace as a substantially parallel flow, and the solid fuel and the gasifying agent are partially burned in the gas furnace. The formed high-temperature combustible gas flame of 2000 ° C. to 2500 ° C. can be formed at a front position farther from the tip of the burner than the temperature distribution diagram shown in FIG.

  As shown in the temperature distribution diagram of FIG. 4, the flame may be formed so that the high-temperature 2500 K or 2000 K isotherm exists at a position away from the burner tip of the solid fuel gasification burner 20. It becomes possible.

  From the above, in the solid fuel gasification burner 20 of the present embodiment, by preventing the occurrence of a flame in the high temperature region of 2500 K or 2000 K on the burner tip and the wall material of the gasification furnace near the burner tip. The heat received by the tip member 2 of the outer tube 1 constituting the solid fuel gasification burner 20 is reduced, so that the tip member of the burner and the wall material of the gasification furnace near the tip of the burner are thermally deformed and cracked. Alternatively, it is possible to suppress the occurrence of problems such as melting.

  By the way, as the solid fuel gasification burner 20, the solid fuel becomes a uniform concentration at the stage where the solid fuel is injected into the gasification furnace from the solid fuel injection hole 23 at the tip of the solid fuel flow path 13. Need to be.

  If the concentration of the solid fuel flowing down in the solid fuel flow path 13 becomes non-uniform in the circumferential direction of the solid fuel transport pipe 3 and the solid fuel concentration is deviated in the circumferential direction, this will occur in a region where the concentration of the solid fuel is low. Since the concentration of the gasifying agent is relatively higher than the concentration of the solid fuel, the combustion rate in the case of partial combustion in the gasifier increases and the temperature rises.

  That is, when the concentration of solid fuel becomes uneven and partial combustion occurs in the gasifier, the combustion proceeds not only to the stage of generating carbon monoxide but also to the stage of generating oxygen dioxide. It will be in a state to end.

  Therefore, if there is a deviation in the concentration of the solid fuel ejected from the solid fuel ejection hole 23 of the solid fuel gasification burner 20 to the gasification furnace, a local high temperature region may be generated.

  Therefore, in the solid fuel gasification burner 20 of the present embodiment having the configuration shown in FIGS. 1 to 5, the solid fuel flows through the annular solid fuel flow path 13 while circulating the solid fuel and the carrier gas. The solid fuel is uniformly dispersed in the circumferential direction of the solid fuel transport pipe 3, and the deviation of the concentration distribution of the solid fuel becomes small, so that it can be ejected from the solid fuel ejection hole 23 at the tip of the solid fuel flow path 13 into the gas furnace.

  For example, in the solid fuel gasification burner 20 of this embodiment, the burner tip of the solid fuel flow path when the solid fuel and the carrier gas are circulated without generating a swirling flow in the solid fuel flow path 13. The standard deviation of the circumferential concentration of the solid fuel is about 19% as shown in FIG. 5 as the standard deviation A of the circumferential concentration of the solid fuel at the tip of the burner as shown as the reference condition.

  On the other hand, in the solid fuel gasification burner 20 of the present embodiment, a swirl flow is generated in the solid fuel flow path 13 so that the solid fuel and the transfer gas are circulated at the burner tip of the solid fuel flow path. The standard deviation of the circumferential concentration of the solid fuel is about 12% as shown by the standard deviation B of the circumferential concentration of the solid fuel at the tip of the burner as shown in FIG. Compared to the case, the standard deviation can be suppressed to 2/3 or less.

  In this way, by suppressing the standard deviation of the circumferential concentration of the solid fuel at the burner tip of the solid fuel flow path to a small value, the tip member of the solid fuel gasification burner and the wall of the gasifier near the tip of the burner It is possible to reduce the occurrence of a local high-temperature region in the material, and to suppress damage that occurs in the tip member of the burner and the wall material of the gasification furnace near the tip of the burner.

  As described above, in the solid fuel gasification burner 20 of this embodiment, for example, the amount of heat received by the tip member of the solid fuel gasification burner can be reduced by about 20% by actual measurement. Thermal stress generated due to a locally generated high temperature region can be reduced, and occurrence of damage such as cracks can be suppressed.

  Further, in the solid fuel gasification burner 20 of the present embodiment, the heat received by the wall material of the gasification furnace in the vicinity of the burner tip decreases simultaneously with the reduction of the local high-temperature region generated in the tip member of the burner. Generation | occurrence | production of damage, such as melting damage, can be suppressed to the wall member of a chemical reactor.

  Therefore, by adopting the solid fuel gasification burner 20 of the present embodiment, there is a problem that a local high temperature region is generated in the tip member of the solid fuel gasification burner or the wall material of the gasification furnace near the tip of the burner. Since it can suppress, the emergency stop of the gasification plant based on the damage of the tip member of a burner or the wall material of a gasification furnace can be avoided, and the safe operation of the gasification furnace becomes possible.

  Moreover, since the repair frequency of the burner tip member and the wall material of the gasification furnace is also reduced, it is useful for reducing the repair cost.

  According to the solid fuel gasification burner of the above-described embodiment of the present invention, it is possible to suppress a problem caused by the occurrence of a high temperature region in the tip member of the solid fuel gasification burner or the wall material of the gasification furnace in the vicinity of the tip of the burner. A solid fuel gasification burner that enables operation of the gasifier can be realized.

  Next, a solid fuel gasification burner according to a second embodiment of the present invention will be described with reference to FIGS.

  The solid fuel gasification burner of this embodiment has the same basic configuration as that of the solid fuel gasification burner of the previous embodiment shown in FIGS. 1 to 4, so the description of the configuration common to both is omitted. Only different configurations will be described below.

  FIG. 6 shows a sectional view of the vicinity of the inlet portion of the solid fuel gasification burner 20 according to the second embodiment of the present invention. FIG. 7 shows the solid fuel gasification burner 20 of this embodiment from the inlet portion direction. FIG.

  6 and 7, in the solid fuel gasification burner 20 of this embodiment, in addition to the solid fuel inlet pipe 43 for introducing the solid fuel into the end of the solid fuel transport pipe 3 forming the solid fuel flow path 13. The auxiliary gas inlet pipe 45 for introducing the auxiliary gas is installed.

  In the solid fuel gasification burner 20 of the present embodiment, in addition to the installation of the solid fuel inlet pipe 43 for introducing the solid fuel into the end of the solid fuel transfer pipe 3 that forms the annular solid fuel flow path 13, the auxiliary gas is further added. An auxiliary gas inlet pipe 45 is installed.

  When the auxiliary gas inlet pipe 45 is installed, the center line of the solid fuel transport pipe 3 that forms the solid fuel flow path 13 and the center line of the circular pipe that constitutes the auxiliary gas inlet pipe 45 in the same manner as the solid fuel inlet pipe 43. Connect them so that they do not cross each other. The auxiliary gas inlet pipe 45 may be not only a circular pipe but also a rectangular flow path.

  From the auxiliary gas inlet 35 of the auxiliary gas inlet pipe 45, the same gas as the solid fuel transfer gas such as nitrogen flows down the solid fuel flow path 13 having a circular donut-shaped flow path cross section. 45.

  This enhances the turning force when the solid fuel supplied from the solid fuel inlet 33 is conveyed toward the tip of the nozzle while turning in the solid fuel flow path 13 having a circular donut shape in the flow path cross section. Is done.

  The solid fuel flowing down in the solid fuel flow path 13 is enhanced by the swirling flow of the solid fuel flowing in the solid fuel flow path 13 having a circular donut-like cross section and the transfer gas. Evenly distributed in the circumferential direction of the tube 3, the deviation of the concentration distribution of the solid fuel can be further reduced.

  For example, in the solid fuel gasification burner 20 of the present embodiment, the auxiliary gas is supplied from the auxiliary gas inlet pipe 45 into the solid fuel flow path 13 formed inside the solid fuel transfer pipe 3, and the solid fuel flow path 13. The standard deviation of the circumferential concentration of the solid fuel at the burner tip of the solid fuel flow path when the swirl flow is generated and the solid fuel and the carrier gas are circulated is shown in FIG. As shown as an enhanced condition, the standard deviation C of the solid fuel circumferential concentration at the tip of the burner becomes a value of about 6%.

  In the solid fuel gasification burner 20 of the present embodiment, the value of about 6%, which is the standard deviation C of the solid fuel circumferential concentration at the burner tip, is the burner under the turning condition of the embodiment shown in FIG. Solid at the burner tip under standard conditions where the solid fuel and the carrier gas are circulated without generating a swirling flow, approximately half of the 12% value shown as the standard deviation B of the circumferential concentration of solid fuel at the tip It can be reduced to about ¼ of the value of about 19% shown as the standard deviation A of the circumferential concentration of fuel.

    According to the solid fuel gasification burner 20 of the present embodiment, the deviation in the circumferential concentration of the solid fuel at the burner tip can be further reduced. Therefore, the gasification furnace near the tip of the solid fuel gasification burner and the tip of the burner As a result, it is possible to prevent problems caused by local high-temperature regions in the wall material of the gas generator, so that an emergency stop of the gasification plant due to damage to the tip of the burner or the wall material of the gasification furnace can be avoided, and a safe gasification furnace Can be operated.

  Moreover, since the repair frequency of the burner tip member and the wall material of the gasification furnace is also reduced, it is useful for reducing the repair cost.

  According to the solid fuel gasification burner of the above-described embodiment of the present invention, it is possible to suppress a problem caused by the occurrence of a high temperature region in the tip member of the solid fuel gasification burner or the wall material of the gasification furnace in the vicinity of the tip of the burner. A solid fuel gasification burner that enables operation of the gasifier can be realized.

  Next, as a third embodiment of the present invention, a gasification furnace 60 using the solid fuel gasification burner 20 according to the first embodiment or the second embodiment will be described.

  FIG. 8 shows an example of a coal gasification furnace 60 using the solid fuel gasification burner 20 according to the first embodiment or the second embodiment shown in FIGS. 1 to 4 or 6 to 7.

  As shown in FIG. 8, the gasification chamber 70 constituting the gasification furnace 60 reacts with the solid fuel and the gasifying agent within the gasification chamber 70 to cause partial combustion, and has a high temperature mainly composed of carbon monoxide and hydrogen. This produces flammable gas.

  The gasification chamber 70 is housed inside a pressure vessel 61, and the inner wall of the gasification chamber 70 is surrounded by a water-cooled pipe 64 having a refractory material 65 attached inside.

  The gasification chamber 70 comprises coal as a solid fuel respectively supplied from the upper and lower solid fuel gasification burners 20a and 20b installed in the upper and lower portions of the gasification chamber 70, and a gasifying agent. It is a chamber that reacts and partially burns to produce high temperature carbon monoxide and hydrogen combustible gas.

  A gas outlet hole 67 for discharging the gas from the gasification chamber 70 to the outside is provided on the upper end surface of the gasification chamber 70.

  The solid fuel gasified burners 20a and 20b, which are combusted and burned by solid coal, contain ash, but the temperature in the gasification chamber 70 is 1000 ° C. to 1800 ° C. above the melting temperature of the ash. By operating at a temperature, the ash melts into slag and flows down to the lower part of the gasification chamber 70.

  Therefore, a slag discharge hole 66 for discharging the slag from the gasification chamber 70 to the outside is provided on the lower end surface of the gasification chamber 70.

  As described above, the upper solid fuel gasification burner 20a and the lower solid fuel gasification burner 20b are disposed above and below the gasification chamber 70, respectively.

  The upper solid fuel gasification burner 20a and the lower solid fuel gasification burner 20b are the solid fuel gasification burner 20 according to the first embodiment or the second embodiment of the present invention described above.

  The upper solid fuel gasification burner 20a and the lower solid fuel gasification burner 20b are arranged in the pressure vessel 61 by the upper burner mounting seat 62 and the lower burner mounting seat 63 installed in the pressure vessel 61 of the gasification furnace 60. It is fixed to each.

  The leading ends of the upper solid fuel gasification burner 20a and the lower solid fuel gasification burner 20b are disposed facing the gasification chamber 70 and are exposed to the high-temperature gas generated in the gasification chamber 70.

  By using the solid fuel gasification burner 20 according to the first embodiment or the second embodiment of the present invention as the upper solid fuel gasification burner 20a and the lower solid fuel gasification burner 20b, the solid fuel gas can be obtained. Since it is possible to suppress problems due to the occurrence of local high-temperature regions in the tip member of the gasification burner 20 and the wall material of the gasification furnace near the tip of the burner, it is based on damage to the tip member of the burner and the wall material of the gasification furnace. An emergency stop of the gasification plant can be avoided, and a safe operation of the gasification furnace becomes possible.

  Moreover, since the repair frequency of the burner tip member and the wall material of the gasification furnace is also reduced, it is useful for reducing the repair cost.

  In addition, the example of the said gasification furnace is an example, Even if it is a gasification furnace of forms other than the above, the solid fuel gasification burner concerning this invention is applicable.

  According to the solid fuel gasification burner of the above-described embodiment of the present invention, it is possible to suppress a problem caused by the occurrence of a high temperature region in the tip member of the solid fuel gasification burner or the wall material of the gasification furnace in the vicinity of the tip of the burner. A gasification furnace equipped with a solid fuel gasification burner that enables operation of the gasification furnace can be realized.

  The present invention is applicable to a solid fuel gasification burner installed in a gasification furnace and a gasification furnace equipped with a solid fuel gasification burner.

1 is a cross-sectional view of a solid fuel gasification burner according to a first embodiment of the present invention. The figure which looked at the solid fuel gasification burner of 1st Example of this invention shown in FIG. 1 from the front-end | tip part. The longitudinal cross-sectional view of the solid fuel gasification burner of 1st Example of this invention shown in FIG. The flame temperature distribution figure which shows the calculation result of the flame temperature distribution in the solid fuel gasification burner which is 1st Example of this invention shown in FIG. FIG. 3 is an actual measurement example of the standard deviation of the circumferential concentration of the solid fuel at the tip of the burner when the solid fuel conveyance state is changed in the solid fuel gasification burner according to the first embodiment of the present invention shown in FIG. 1; The fragmentary sectional view of the inlet-portion vicinity in the solid fuel gasification burner which is 2nd Example of this invention. FIG. 7 is a longitudinal sectional view of the solid fuel gasification burner of the second embodiment of the present invention shown in FIG. 6. Schematic which shows the coal gasification furnace which is 3rd Example of this invention using the solid fuel gasification burner of Example of this invention shown in FIG. 1 or FIG. The temperature distribution figure of the flame in a burner at the time of forming the cyclic | annular gasification agent flow path in the outer peripheral side of a solid fuel flow path.

Explanation of symbols

  1: outer tube, 2: tip member, 3: solid fuel transfer pipe, 4: gasifying agent transfer pipe, 11: cooling medium flow path, 11a: first cooling flow path, 11b: second cooling flow path , 12: partition member, 13: solid fuel flow path, 14: gasification agent flow path, 20, 20a, 20b: solid fuel gasification burner, 23: solid fuel injection hole, 24: gasification agent injection hole, 31: Coolant inlet, 32: Coolant outlet, 33: Solid fuel inlet, 34: Gasifier inlet, 35: Auxiliary gas inlet, 41: Coolant inlet pipe, 42: Coolant outlet pipe, 43: Solid fuel inlet pipe, 45: auxiliary gas inlet pipe, 60: gasification furnace, 61: gasification furnace pressure vessel, 62: upper burner mounting seat, 63: lower burner mounting seat, 64: water cooling pipe, 65: refractory material, 66: slag discharge hole 67: Gas outlet hole, 68: Upper burner, 69: Lower burner, 70: Gas Ionization chamber.

Claims (7)

Solid fuel gas installed in a gasification furnace that supplies solid fuel containing carbon and hydrogen, such as coal, to a gasification furnace as a mixed fluid with a carrier gas, reacts with a gasifying agent, and partially burns to gasify In the burner
The solid fuel gasification burner includes a solid fuel transfer pipe that forms a solid fuel flow path through which a mixed fluid of a solid fuel and a transfer gas is circulated and ejected to a gasification furnace, and an inner peripheral side of the solid fuel transfer pipe A gasifying agent conveying pipe that forms a gasifying agent flow path that circulates the gasifying agent and jets it to the gasification furnace, and a flow that is arranged on the outer peripheral side of the solid fuel conveying pipe and circulates the cooling medium. An outer tube that forms a cooling medium flow path with an annular cross section, a cooling medium inlet pipe that is connected to the outer cylindrical pipe and introduces the cooling medium into the cooling medium flow path, and a cooling medium that is connected to the outer cylindrical pipe A solid fuel gasification burner comprising: a cooling medium outlet pipe that leads out the cooling medium from the cooling medium flow path. The solid fuel gasification burner according to claim 1,
A first cooling flow in which a partition member is disposed along a length direction of the outer cylinder pipe inside the cooling medium flow path formed in the outer cylinder pipe, and the cooling medium flow path communicates with the cooling medium inlet pipe. A solid fuel gasification burner characterized in that it is partitioned into a passage and a second cooling passage communicating with the cooling medium outlet pipe. In the solid fuel gasification burner according to claim 1 or 2,
The solid fuel flow path formed in the solid fuel transfer pipe and the gasifying agent flow path formed in the gasifying agent transfer pipe are both concentrically arranged along the longitudinal direction of the solid fuel transfer pipe. A solid fuel gasification burner characterized by that. In the solid fuel gasification burner according to claim 1 or 2,
A fuel inlet pipe for supplying a mixed fluid of solid fuel and carrier gas is installed in the solid fuel flow path of the solid fuel transfer pipe, and the center line of the fuel inlet pipe is shifted from the center line of the solid fuel transfer pipe. And a solid fuel gasification burner connected to the solid fuel transfer pipe. In the solid fuel gasification burner according to claim 1 or 2,
A carrier gas inlet pipe for supplying only carrier gas to the solid fuel flow path of the solid fuel carrier pipe is installed, and the carrier gas inlet pipe has its center line shifted from the center line of the solid fuel carrier pipe. Solid fuel gasification burner characterized in that it is connected to a tube. In the solid fuel gasification burner according to claim 4,
A carrier gas inlet pipe for supplying only carrier gas to the solid fuel flow path of the solid fuel carrier pipe is installed, and the carrier gas inlet pipe has its center line shifted from the center line of the solid fuel carrier pipe. Solid fuel gasification burner, characterized in that it is connected to a tube.   A solid fuel gasification burner that forms a solid fuel flow path that circulates a fluid mixture of a solid fuel containing carbon and hydrogen, such as coal, and a carrier gas, and jets it to a gasification furnace; and A gasifying agent conveying pipe disposed on the inner peripheral side of the solid fuel conveying pipe to form a gasifying agent flow path through which the gasifying agent is circulated and ejected to the gasification furnace; and an outer peripheral side of the solid fuel conveying pipe. An outer tube that forms an annular cooling medium flow path in which the cooling medium is circulated, a cooling medium inlet pipe that is connected to the outer cylindrical pipe and introduces the cooling medium into the cooling medium flow path, A cooling medium outlet pipe connected to a cylindrical pipe and leading out the cooling medium from the cooling medium flow path. A plurality of these solid fuel gasification burners are installed in a gasification furnace, and these solid fuel gases are provided. The solid fuel and gasifying agent supplied from the gasification burner are partially combusted in the gasification furnace. Gasifier having a solid fuel gasification burner, characterized by being configured to generate a combustible gas Te.

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