JP7242307B2 - Burner, burner system, gasification furnace equipment, combined gasification combined cycle equipment, and burner maintenance method - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to burners, burner systems, gasification furnace equipment, integrated gasification combined cycle equipment, and burner maintenance methods.

Conventionally, as a gasification furnace facility, a carbon-containing solid fuel such as coal is supplied into the gasification furnace, and the carbon-containing solid fuel is gasified by partially burning it, thereby producing a combustible gas. Carbon-containing fuel gasification Installations (coal gasification installations) are known.

The burner provided in the gasification furnace has a fuel pipe (burner main pipe) that conveys pulverized fuel such as pulverized coal by a carrier gas such as nitrogen, and a burner main pipe that covers the outer peripheral surface of the fuel pipe and is located between the outer peripheral surface of the fuel pipe. It is composed of multiple tubes provided with an oxidant tube (air tube) for introducing an oxidant such as air. On the other hand, the gasifier has a pressure vessel and a gasifier wall provided inside the pressure vessel. During operation of the gasifier, thermal expansion occurs in both the gasifier wall and the pressure vessel, Differences in thermal elongation occur between the gasifier wall and the pressure vessel due to differences in temperature and materials. At this time, since the burner has a long multi-tube structure inserted from the outside of the pressure vessel into the inside of the gasifier wall, the fuel tube is bent due to the difference in thermal elongation between the gasifier wall and the pressure vessel. There is a possibility that the stress between the multiple tubes will be generated or concentrated, resulting in deformation or breakage of the fuel tubes.

Techniques such as the following patent documents 1 to 3 have been reported as countermeasures against such bending of the fuel pipe. Japanese Patent Laid-Open No. 2002-200001 adopts a method of reducing self-weight deflection of the fuel pipe by providing a plurality of supports radially in the circumferential direction of the fuel pipe and at different positions in the axial direction of the fuel pipe.

Patent Document 2 discloses a structure in which an igniter, a compressed air supply pipe, and a liquid fuel supply pipe are supported by a support member attached inside a combustion cylinder.

Patent Document 3 discloses a configuration in which a collar for holding the inner tube at the center position of the outer tube is welded to the outer wall surface of the cylindrical inner tube. The flanges protrude radially from the outer wall surface of the inner pipe near both ends of the inner pipe.

Japanese Patent No. 5705970 JP-A-11-173513 Japanese Patent No. 2806508

Below, referring to FIG. 4, a more detailed description will be given of problems that arise when a plurality of supports are provided radially in the circumferential direction of the fuel pipe and at different positions in the axial direction of the fuel pipe. FIG. 4 is a side cross-sectional view showing the configuration in the vicinity of the burner, corresponding to FIG. 2 of Patent Document 1. As shown in FIG. In addition, in FIG. 4, an oxidant tube expansion is added to FIG. 2 of Patent Document 1, and the reference numerals are changed. Further, in FIG. 4, the horizontal right direction of the paper surface indicates the outside of the furnace, and the horizontal left direction of the paper surface indicates the inside of the furnace.

As shown in FIG. 4, a reaction furnace such as a gasification furnace provided in a power plant or the like has a pressure vessel 110 and a gasification furnace wall (furnace wall) 111 provided in the pressure vessel 110. there is An annulus portion 115 is formed between the pressure vessel 110 and the furnace wall 111 to maintain a high pressure state inside the gasification furnace 101 . The gasification furnace 101 is provided with a burner 261 which has a base end on the side wall of the furnace wall 111 and extends from the side wall of the furnace wall 111 toward the pressure vessel 110 to penetrate the pressure vessel 110 . ing.

The burner 261 covers a fuel pipe (burner body pipe) 262 that conveys pulverized fuel such as pulverized coal by a carrier gas such as nitrogen, and the outer peripheral surface of the fuel pipe 262 . It has an oxidant tube (air tube) 263 into which an oxidant such as air is introduced, and a guide tube 264 provided on the outer periphery of the oxidant tube 263 . An oxidizing agent introduction flange portion 265 for introducing an oxidizing agent is provided on the side wall of the oxidizing agent pipe 263 on the outside of the furnace.

In order to relieve the stress generated in the oxidant tube 263 and the guide tube 264, the oxidant tube 263 and the guide tube 264 of the burner 261 are provided with an oxidant tube expansion 266 and a guide tube expansion 267, respectively. Fuel tube 262 is provided with a plurality of supports 268 extending radially outward from its outer peripheral surface. A plurality of supports 268 are provided radially in the circumferential direction of the fuel pipe 262 and at different positions in the longitudinal direction of the fuel pipe 262 . The extended end of the support 268 is in the vicinity of the inner peripheral surface of the oxidant tube 263 and is not fixed to the inner peripheral surface of the oxidant tube 263 . By providing a plurality of supports 268 on the outer peripheral side wall surface of the fuel pipe 262 in this manner, the fuel pipe 262 is supported from the inside of the oxidant pipe 263 .

However, in such a configuration, when the fuel pipe 262 is inserted into or pulled out from the oxidizer pipe 263 for maintenance or the like, the support 268 of the fuel pipe 262 is placed on the oxidizer pipe expansion 266 which is bent due to its own weight or the like. It has been found that there is a case where it is caught and insertion/removal becomes difficult (that is, maintainability deteriorates). Until now, no particular attention has been paid to the maintainability of such burners. In addition, when a flame stabilizer (swirler) is provided at the tip of the fuel pipe, suppression of load application to the blades (fins) of the flame stabilizer has also been a problem.

When the support 268 has a rectangular side cross section and a square front cross section, the support 268 that supports the weight of the fuel pipe 262 comes into planar or linear contact with the inner peripheral surface of the oxidizer pipe 263 . , the supporting portion of the support 268 is not rotationally supported on the inner peripheral surface of the oxidizing agent tube 263 and is in a semi-fixed state. For this reason, it has been found that when the fuel pipe 262 is displaced, the moment generated in the fuel pipe 262 increases and a large stress may occur.

The present disclosure has been made in view of such circumstances, and aims to provide a burner, a burner system, a gasification furnace facility, an integrated gasification combined cycle facility, and a burner maintenance method that are easy to maintain. do.

In order to solve the above problems, the present disclosure employs the following means.
The burner of the present disclosure includes a fuel pipe that conveys fuel, an oxidant pipe that covers the outer peripheral surface of the fuel pipe and introduces an oxidant between the outer peripheral surface of the fuel pipe, and an extension of the oxidant pipe. a displacement absorbing member provided on at least a portion of the fuel pipe, wherein a plurality of ribs are provided on an outer peripheral surface of the fuel pipe so as to protrude radially outward of the fuel pipe; At least one of the ribs has a corner portion on the inner peripheral surface side of the oxidizer tube in a front cross-sectional view , and when the rib is in contact with the inner peripheral surface of the oxidizer tube, the rib and the oxidizer tube contact each other. It is chamfered into a curved surface so as to make point contact with the inner peripheral surface of the tube .

In the burner of the present disclosure, a plurality of ribs are provided on the outer peripheral surface of the fuel tube (burner main tube), and one or more of the plurality of ribs are provided on the inner peripheral surface side of the oxidant tube (air tube). The corners of the faces are chamfered. Ribs are used, for example, to support fuel tubes. In this way, since ribs with chamfered corners are provided, when the fuel pipe is inserted into or removed from the oxidizer pipe during maintenance of the fuel pipe, the ribs do not get caught on the oxidizer pipe (particularly, the displacement absorbing member). The fuel pipe can be easily inserted and removed without any trouble. Therefore, maintenance of the burner is facilitated. In addition, the point contact between the chamfered ribs and the inner peripheral surface of the oxidizer tube allows the fuel tube to be rotationally supported by the inner peripheral surface of the oxidizer tube through the ribs. It is possible to prevent bending moment from occurring. Further, for example, if it is known in advance which rib will be caught by the oxidizer pipe when the fuel pipe is inserted and removed, and it is known in advance that the fuel pipe is supported more by this rib than by other ribs, Only the ribs that hook onto the oxidant tube may be chamfered. This eliminates the need to chamfer all the ribs provided on the fuel pipe.

In the above burner, it is preferable that all of the plurality of ribs have chamfered corners on the inner peripheral surface side of the oxidizer tube.

If all the corners of the ribs provided on the outer peripheral surface of the fuel pipe on the inner peripheral surface side of the oxidizer pipe are chamfered, the ribs can be removed when the fuel pipe is inserted into or removed from the oxidizer pipe during maintenance of the fuel pipe. Since the chamfered portion of the oxidizing agent pipe (particularly, the displacement absorbing member) can be prevented from being caught by the oxidizing agent pipe (particularly, the displacement absorbing member). In addition, since the ribs with chamfered corners and the inner peripheral surface of the oxidizer tube are always in point contact, the fuel tube is always supported to rotate on the inner peripheral surface of the oxidizer tube through the ribs, and the fuel tube is not bent significantly. It is possible to more reliably prevent the moment from being generated.

Further, the present disclosure includes the above-described burner and a control unit that performs control to insert the fuel pipe into the oxidizer pipe or pull out the fuel pipe from the oxidizer pipe while managing the position of the fuel pipe. and a burner system.

The burner system of the present disclosure includes a burner in which a fuel tube is provided with ribs in which all the corners of the inner peripheral surface of the oxidant tube are chamfered. Therefore, when the fuel pipe is inserted into the oxidizer pipe by the control unit for maintenance or the like, or when the fuel pipe is pulled out from the oxidizer pipe, the control unit uses an inserting/removing device such as a driving cylinder to extend the longitudinal direction. Even if control is performed to move the burner to a predetermined burner tip position along the axial direction, the rib can be pulled out and inserted without being caught by the oxidant tube (particularly, the displacement absorbing member). Therefore, with such a burner system, it is easy to adjust the position of the tip of the burner protruding inside the furnace wall, and maintenance is improved.

The present disclosure also provides a gasifier facility comprising the burner described above and a gasifier to which pulverized fuel is supplied from the burner.

Further, the present disclosure includes the above-described gasification furnace equipment, a gas turbine that is rotationally driven by burning at least part of the generated gas generated in the gasification furnace equipment, and turbine exhaust gas discharged from the gas turbine. A combined gasification combined cycle system comprising a steam turbine that is rotationally driven by steam generated by an exhaust heat recovery boiler to be introduced, and a power generator that is coupled to the gas turbine and/or the rotational drive of the steam turbine.

Further, the present disclosure includes a fuel pipe that conveys fuel, an oxidant pipe that covers the outer peripheral surface of the fuel pipe and introduces an oxidant between the outer peripheral surface of the fuel pipe, and an extension of the oxidant pipe. a displacement absorbing member provided on at least a portion of the fuel pipe, wherein a plurality of ribs are provided on an outer peripheral surface of the fuel pipe so as to protrude radially outward of the fuel pipe; At least one of the ribs has a corner portion on the inner peripheral surface side of the oxidizer tube in a front cross-sectional view , and when the rib is in contact with the inner peripheral surface of the oxidizer tube, the rib and the oxidizer tube contact each other. In a maintenance method for a burner having a curved surface chamfered so that the inner peripheral surface of an oxidant tube is in point contact, a pulling step of pulling out the fuel tube from the inside of the oxidant tube; and an inserting step of inserting the burner into the interior of the burner.

In the burner maintenance method of the present disclosure, a plurality of ribs are provided on the outer peripheral surface of the fuel tube (burner main tube), and one or more of the plurality of ribs are provided on the inner periphery of the oxidant tube (air tube). A burner with chamfered corners on the face side is used. As described above, since the burner having ribs with chamfered corners is used, when the fuel pipe is inserted into or pulled out of the oxidizer pipe during maintenance of the fuel pipe, the ribs are not caught on the oxidizer pipe (particularly, the displacement absorbing member). The fuel pipe can be easily inserted and removed without any trouble. Therefore, maintenance of the burner is facilitated. In addition, the point contact between the chamfered ribs and the inner peripheral surface of the oxidizer tube allows the fuel tube to be rotationally supported by the inner peripheral surface of the oxidizer tube through the ribs. It is possible to prevent bending moment from occurring. Further, for example, if it is known in advance which rib will be caught by the oxidizer pipe when the fuel pipe is inserted and removed, and it is known in advance that the fuel pipe is supported more by this rib than by other ribs, Only the ribs that hook onto the oxidant tube may be chamfered. This eliminates the need to chamfer all the ribs provided on the fuel pipe.

According to the burner of the present disclosure, the maintenance of the burner is facilitated because the fuel pipe can be easily inserted into and removed from the oxidizer pipe during maintenance of the fuel pipe.

1 is a schematic configuration diagram showing a combined coal gasification combined cycle facility according to an embodiment of the present disclosure; FIG. FIG. 2 is a schematic diagram showing the gasification furnace equipment of FIG. 1; 1 is a side cross-sectional view showing a configuration in the vicinity of a burner according to an embodiment of the present disclosure; FIG. FIG. 3B is a cross-sectional view taken along the line AA of FIG. 3A; 3C is an enlarged view of the guide tube, oxidant tube, and fuel tube in FIG. 3B; FIG. It is the figure which expanded the part enclosed with the two-dot chain line in FIG. 3C. FIG. 2 is a side cross-sectional view showing a configuration in the vicinity of a burner corresponding to FIG. 2 of Patent Document 1;

An embodiment of a burner, a burner system, a gasification furnace facility, an integrated gasification combined cycle facility, and a burner maintenance method according to the present disclosure will be described below with reference to the drawings. In the present embodiment, "upward" means the vertically upward direction, and "downward" means the vertically downward direction.

[Coal gasification combined cycle facility]
A burner according to an embodiment of the present disclosure will be described below with reference to the drawings.
The burner according to the present embodiment will be described using a case where it is applied to, for example, a coal gasification combined cycle facility. FIG. 1 is a schematic configuration diagram of a combined coal gasification combined cycle facility to which a burner according to this embodiment is applied.

The integrated coal gasification combined cycle (IGCC) 10 to which the gasifier equipment 14 according to the present embodiment is applied uses air as a main oxidant, and in the gasifier equipment 14 , adopts an air combustion system that generates combustible gas (produced gas) from fuel. The combined coal gasification combined cycle facility 10 refines the generated gas generated in the gasification furnace facility 14 in the gas refining facility 16 to obtain fuel gas, and then supplies the fuel gas to the gas turbine 17 to generate power. That is, the combined coal gasification combined cycle facility 10 of the present embodiment is an air-combustion type (air-blown) power generation facility. As the fuel to be supplied to the gasification furnace facility 14, for example, carbon-containing solid fuel such as coal is used.

The integrated coal gasification combined cycle facility (combined gasification combined cycle facility) 10, as shown in FIG. 17 , a steam turbine 18 , a generator 19 , and a heat recovery steam generator (HRSG) 20 .

The coal supply facility 11 is supplied with coal, which is a carbon-containing solid fuel, as raw coal, and pulverizes the coal with a coal mill (not shown) or the like to produce pulverized coal pulverized into fine particles. The pulverized coal produced in the coal feed facility 11 is pressurized by nitrogen gas as a carrier inert gas supplied from the air separation facility 42 described later at the outlet of the coal feed line 11a, and supplied to the gasification furnace facility 14. be done. Inert gas is an inert gas with an oxygen content of about 5% by volume or less, and typical examples thereof include nitrogen gas, carbon dioxide gas, and argon gas, but the content is not necessarily limited to about 5% by volume or less. .

The gasifier equipment 14 is supplied with the pulverized coal produced by the coal feed equipment 11 and also supplied with char (unreacted coal and ash) recovered by the char recovery equipment 15 for the purpose of reuse. there is

A compressed air supply line 41 from a gas turbine 17 (compressor 61 ) is connected to the gasification furnace equipment 14 , and part of the compressed air compressed by the gas turbine 17 is supplied to a booster 68 at a predetermined pressure. , and can be supplied to the gasification furnace facility 14. The air separation facility 42 separates and produces nitrogen and oxygen from atmospheric air, and the air separation facility 42 and the gasification furnace facility 14 are connected by a first nitrogen supply line 43 . A coal supply line 11 a from a coal supply facility 11 is connected to the first nitrogen supply line 43 . A second nitrogen supply line 45 branched from the first nitrogen supply line 43 is also connected to the gasification furnace equipment 14, and the second nitrogen supply line 45 is connected to a char return line 46 from the char recovery equipment 15. It is connected. Furthermore, the air separation plant 42 is connected to the compressed air supply line 41 by an oxygen supply line 47 . The nitrogen separated by the air separation equipment 42 flows through the first nitrogen supply line 43 and the second nitrogen supply line 45 and is used as a carrier gas for coal and char. Also, the oxygen separated by the air separation equipment 42 is used as an oxidant in the gasification furnace equipment 14 by flowing through the oxygen supply line 47 and the compressed air supply line 41 .

The gasification furnace facility 14 includes, for example, a two-stage entrained bed type gasification furnace 101 (see FIG. 2). The gasification furnace equipment 14 partially burns the coal (pulverized coal) and char supplied therein with an oxidizing agent (air, oxygen) to gasify them into a generated gas. The gasification furnace facility 14 is provided with a foreign matter removal facility 48 for removing foreign matter (slag) mixed in the pulverized coal. A generated gas line 49 for supplying a generated gas to the char recovery equipment 15 is connected to the gasification furnace equipment 14 so that the generated gas containing char can be discharged. In this case, as shown in FIG. 2 , a syngas cooler 102 (gas cooler) may be provided in the generated gas line 49 to cool the generated gas to a predetermined temperature before supplying it to the char recovery facility 15 .

The char recovery facility 15 includes a dust collection facility 51 and a supply hopper 52 . In this case, the dust collector 51 is composed of one or more cyclones or porous filters, and can separate the char contained in the product gas produced by the gasification furnace equipment 14 . The produced gas from which the char has been separated is sent to the gas purification facility 16 through the gas discharge line 53 . The supply hopper 52 stores the char separated from the generated gas by the dust collector 51 . Alternatively, a bin may be arranged between the dust collector 51 and the supply hopper 52, and a plurality of supply hoppers 52 may be connected to the bin. A char return line 46 from the supply hopper 52 is connected to the second nitrogen supply line 45 .

The gas refining equipment 16 performs gas refining by removing impurities such as sulfur compounds and nitrogen compounds from the generated gas from which the char is separated by the char recovery equipment 15 . The gas refining equipment 16 then refines the produced gas to produce fuel gas, which is supplied to the gas turbine 17 . Since the generated gas from which the char is separated still contains sulfur (such as H ₂ S), the gas refining equipment 16 removes and recovers the sulfur using an amine absorbent or the like to effectively utilize the gas. do.

The gas turbine 17 includes a compressor 61 , a combustor 62 and a turbine 63 , and the compressor 61 and turbine 63 are connected by a rotating shaft 64 . The combustor 62 is connected to a compressed air supply line 65 from the compressor 61 and to a fuel gas supply line 66 from the gas refining facility 16 , and a combustion gas supply line 67 extending toward the turbine 63 . is connected. Further, the gas turbine 17 is provided with a compressed air supply line 41 extending from the compressor 61 to the gasification furnace equipment 14, and is provided with a booster 68 in the middle. Therefore, in the combustor 62, a portion of the compressed air supplied from the compressor 61 and at least a portion of the fuel gas supplied from the gas refining equipment 16 are mixed and burned to generate combustion gas. The resulting combustion gas is directed toward the turbine 63 and supplied. The turbine 63 rotates the generator 19 by rotating the rotary shaft 64 with the supplied combustion gas.

The steam turbine 18 has a turbine 69 connected to the rotating shaft 64 of the gas turbine 17 , and the generator 19 is connected to the base end of this rotating shaft 64 . The exhaust heat recovery boiler 20 is connected to an exhaust gas line 70 from the gas turbine 17 (turbine 63), and heat is exchanged between the feed water to the exhaust heat recovery boiler 20 and the exhaust gas from the turbine 63 to generate steam. is generated. The exhaust heat recovery boiler 20 is provided with a steam supply line 71 and a steam recovery line 72 between it and the turbine 69 of the steam turbine 18 , and the steam recovery line 72 is provided with a condenser 73 . The steam generated by the heat recovery boiler 20 may include steam generated by exchanging heat with the generated gas in the syngas cooler 102 of the gasification furnace 101 . Therefore, in the steam turbine 18 , the steam supplied from the heat recovery steam generator 20 rotates the turbine 69 , and rotates the rotating shaft 64 to rotate the power generator 19 .

A gas cleaning facility 74 is provided from the exit of the heat recovery boiler 20 to the chimney 75 .

Here, the operation of the combined coal gasification combined cycle system 10 of this embodiment will be described.

In the coal gasification combined cycle facility 10 of the present embodiment, when raw coal (coal) is supplied to the coal feeding facility 11, the coal is pulverized into fine particles in the coal feeding facility 11 to become pulverized coal. . The pulverized coal produced in the coal feed facility 11 is supplied to the gasification furnace facility 14 through the first nitrogen supply line 43 with nitrogen supplied from the air separation facility 42 . Also, the char recovered by the char recovery facility 15 described later is supplied to the gasification furnace facility 14 through the second nitrogen supply line 45 with nitrogen supplied from the air separation facility 42 . Further, the compressed air extracted from the gas turbine 17 (to be described later) is pressurized by the booster 68 and then supplied to the gasification furnace equipment 14 through the compressed air supply line 41 together with oxygen supplied from the air separation equipment 42 .

In the gasification furnace equipment 14, the supplied pulverized coal and char are combusted with compressed air (oxygen), and the pulverized coal and char are gasified to generate a generated gas. The produced gas is discharged from the gasification furnace equipment 14 through the produced gas line 49 and sent to the char recovery equipment 15 .

In the char recovery equipment 15, the produced gas is first supplied to the dust collection equipment 51, whereby the fine char contained in the produced gas is separated. The produced gas from which the char has been separated is sent to the gas purification facility 16 through the gas discharge line 53 . On the other hand, the fine char separated from the product gas is accumulated in the supply hopper 52 and returned to the gasification furnace facility 14 through the char return line 46 for recycling.

The generated gas from which the char is separated by the char recovery equipment 15 is purified by removing impurities such as sulfur compounds and nitrogen compounds in the gas purification equipment 16 to produce fuel gas. Compressor 61 produces and supplies compressed air to combustor 62 . The combustor 62 mixes the compressed air supplied from the compressor 61 and the fuel gas supplied from the gas refining equipment 16 and combusts them to generate combustion gas. By rotating the turbine 63 with this combustion gas, the compressor 61 and the generator 19 are rotated via the rotating shaft 64 . In this manner, the gas turbine 17 can generate electricity.

The heat recovery steam generator 20 performs heat exchange between the exhaust gas discharged from the turbine 63 of the gas turbine 17 and the feed water to the heat recovery boiler 20 to generate steam. supply to In the steam turbine 18 , the steam supplied from the heat recovery steam generator 20 rotates the turbine 69 , thereby rotating the generator 19 via the rotating shaft 64 and generating power. The gas turbine 17 and the steam turbine 18 do not have to rotate one generator 19 on the same shaft, and a plurality of generators may rotate on different shafts.

After that, in the gas purification equipment 74, harmful substances are removed from the exhaust gas discharged from the heat recovery boiler 20, and the purified exhaust gas is released to the atmosphere from the chimney 75.

Next, with reference to FIGS. 1 and 2, the gasification furnace equipment 14 in the coal gasification combined cycle equipment 10 described above will be described in detail. FIG. 2 is a schematic configuration diagram showing the gasifier equipment of FIG.

The gasification furnace equipment 14 includes a gasification furnace 101 and a syngas cooler 102, as shown in FIG.

The gasification furnace 101 is formed to extend in the vertical direction, pulverized coal and oxygen are supplied to the lower side in the vertical direction, and the produced gas gasified by partial combustion flows from the lower side to the upper side in the vertical direction. are in circulation. The gasification furnace 101 has a pressure vessel 110 and a gasification furnace wall (furnace wall) 111 provided inside the pressure vessel 110 . The gasification furnace 101 forms an annulus 115 in the space between the pressure vessel 110 and the gasification furnace wall 111 . In addition, in the space inside the gasifier wall 111, the gasifier 101 includes a combustor section 116, a diffuser section 117, and a reductor section 118 in this order from the lower side in the vertical direction (that is, the upstream side in the flow direction of the produced gas). forming

The pressure vessel 110 is formed in a cylindrical shape with a hollow space inside, and has a gas discharge port 121 formed at its upper end and a slag hopper 122 formed at its lower end (bottom). The gasification furnace wall 111 is formed in a cylindrical shape with a hollow space inside, and the wall surface is provided facing the inner surface of the pressure vessel 110 . In this embodiment, the pressure vessel 110 is cylindrical, and the diffuser portion 117 of the gasifier wall 111 is also cylindrical. The gasifier wall 111 is connected to the inner surface of the pressure vessel 110 by a supporting member (not shown).

Gasifier wall 111 separates the interior of pressure vessel 110 into interior space 144 and exterior space 146 . As will be described later, the gasifier wall 111 has a cross-sectional shape that changes at a diffuser portion 117 between a combustor portion 116 and a reductor portion 118 . The gasifier wall 111 has an upper vertically upper end connected to the gas discharge port 121 of the pressure vessel 110 and a vertically lower lower end spaced apart from the bottom of the pressure vessel 110 . ing. Retained water is stored in the slag hopper 122 formed at the bottom of the pressure vessel 110, and the inside and outside of the gasifier wall 111 are sealed when the lower end of the gasifier wall 111 is submerged in the stored water. is stopping. Burners 126 and 127 are inserted into the gasifier wall 111 and the syngas cooler 102 is arranged in the internal space 144 . The structure of the gasification furnace wall 111 will be described later.

The annulus portion 115 is a space formed between the inside of the pressure vessel 110 and the outside of the gasification furnace wall 111, that is, an external space 146. Nitrogen, which is an inert gas separated by the air separation equipment 42, is converted into a nitrogen gas (not shown). supplied through a supply line. Therefore, the annulus portion 115 becomes a space filled with nitrogen. An in-furnace pressure equalizing pipe (not shown) for equalizing the pressure in the gasification furnace 101 is provided near the upper portion of the annulus portion 115 in the vertical direction. The in-furnace pressure equalizing pipe is provided to communicate the inside and outside of the gasification furnace wall 111, and the pressure between the inside (combustor section 116, diffuser section 117 and reductor section 118) and the outside (annulus section 115) of the gasification furnace wall 111 is The pressure is substantially equalized so that the difference is within a predetermined pressure.

The combustor section 116 is a space in which pulverized coal and char are partially combusted with air. The high-temperature combustion gas that has partially combusted the pulverized coal and char in the combustor section 116 passes through the diffuser section 117 and flows into the reductor section 118 .

The reductor section 118 is maintained at a high temperature necessary for the gasification reaction, and supplies pulverized coal to the combustion gas from the combustor section 116 for partial combustion, removing pulverized coal from volatile components (carbon monoxide, hydrogen, lower hydrocarbons, etc.). ) is decomposed and gasified to generate a product gas.

The syngas cooler 102 is provided inside the gasification furnace wall 111 and is provided above the burner 127 of the reductor section 118 in the vertical direction. The syngas cooler 102 is a heat exchanger, and includes an evaporator (evaporator) 131, a superheater (superheater) 132, and a node in order from the lower side in the vertical direction of the gasification furnace wall 111 (upstream side in the flow direction of the produced gas). An economizer 134 is located. These syngas coolers 102 cool the product gas by exchanging heat with the product gas produced in the reductor section 118 . Moreover, the evaporator (evaporator) 131, the superheater (superheater) 132, and the economizer (economizer) 134 are not limited to the numbers shown in the figure.

Here, the operation of the gasification furnace facility 14 described above will be described.
In the gasification furnace 101 of the gasification furnace equipment 14, nitrogen and pulverized coal are introduced and ignited by the burner 127 of the reductor section 118, and pulverized coal, char and compressed air (oxygen) are produced by the burner 126 of the combustor section 116. inserted and ignited. Then, in the combustor part 116, high-temperature combustion gas is generated by combustion of pulverized coal and char. Further, in the combustor section 116 , molten slag is generated in the high-temperature gas by combustion of pulverized coal and char. discharged into a reservoir. The high-temperature combustion gas generated in combustor section 116 rises to reductor section 118 through diffuser section 117 . In the reductor section 118, the high temperature required for the gasification reaction is maintained, the pulverized coal is mixed with the high-temperature combustion gas, and the pulverized coal is partially combusted in a high-temperature reducing atmosphere to perform the gasification reaction, resulting in the generated gas. is generated. The gasified product gas flows vertically from the lower side to the upper side.

Next, a burner according to this embodiment will be described with reference to FIGS. 3A to 3D. The burner according to this embodiment is applied to the burner 126 and the burner 127 in FIG. 2, for example.

FIG. 3A is a side cross-sectional view showing the configuration in the vicinity of the burner according to this embodiment. In FIG. 3A, the horizontal right direction on the paper surface indicates the outside of the furnace, and the horizontal left direction on the paper surface indicates the inside of the furnace. In this embodiment, the gasification furnace 101 has a pressure vessel 110 and a gasification furnace wall (furnace wall) 111 provided inside the pressure vessel 110 . An annulus portion 115 is formed between the pressure vessel 110 and the furnace wall 111 to maintain a high pressure state inside the gasification furnace 101 .

The gasification furnace 101 is provided with a burner 161 having a base end on the side wall of the furnace wall 111 and extending from the side wall of the furnace wall 111 toward the pressure vessel 110 to penetrate the pressure vessel 110 . ing. The burner 161 is fixed to an opening in the side wall of the furnace wall 111 via a seal box 169 to prevent high-temperature combustion gas in the furnace from leaking to the annulus portion 115 . The seal box 169 is made of, for example, SUS material and refractory material, and the burner 161 penetrates through its approximate center.

The pressure-vessel-side opening 110a has a flange structure, and flanges 171a and 171b and bolts (not shown) at both ends of a support pipe 171 capable of supporting the burner 161 on the pressure-vessel-side opening 110a. ) and are fixed by Both ends of the support pipe 171 are flange portions 171 a and 171 b, and the burner 161 is inserted inside the support pipe 171 .

The burner 161 covers a fuel pipe (burner main pipe) 162 that conveys pulverized fuel such as pulverized coal by nitrogen or the like as a carrier gas, and the outer circumference of the fuel pipe 162 . It has a multi-pipe structure including an oxidant pipe (air pipe) 163 into which an oxidant such as air is introduced, and a guide pipe 164 provided on the outer periphery of the oxidant pipe 163 . During operation of the gasifier 101, thermal elongation occurs in both the gasifier wall 111 and the pressure vessel 110, and a difference in thermal elongation occurs between the gasifier wall 111 and the pressure vessel 110 due to differences in temperature and material. . At this time, since the burner 161 has a long multi-tube structure inserted into the gasifier wall 111 from the outside of the pressure vessel 110, the difference in thermal elongation between the gasifier wall 111 and the pressure vessel 110 causes The bending of the fuel pipe 162 may generate or concentrate stress between the multiple pipes, resulting in deformation or breakage of the fuel pipe 162 . Therefore, the burner 161 is elongated so as to absorb the deflection of the fuel pipe 162 due to the difference in thermal elongation between the gasification furnace wall 111 and the pressure vessel 110. A portion of the pipe 164 is provided with an expansion (displacement absorbing member), which will be described later.

The length of the burner 161 in this embodiment (the length indicated by L in FIG. 3A) is, for example, 4 m or more and 10 m or less. Also, the length of burner 161 may be determined by the size of fuel tube 162 or oxidant tube 163 .

Pulverized fuel such as pulverized coal conveyed by nitrogen or the like is introduced into the fuel pipe 162 . One end of the fuel pipe 162 extends through the seal box 169 and into the furnace wall 111 . A circular tube-shaped flame stabilizer (swirler) 170 is fixed to the tip of the fuel pipe 162 between itself and the inner peripheral surface of the oxidizer pipe 163 . The swirler 170 is a metal member that guides the flow of the pulverized fuel and its carrier gas ejected from the fuel pipe 162 and the flow of the oxidant ejected from the oxidant pipe 163 . The other end of the fuel pipe 162 is connected to a pulverized fuel conveying pipe (not shown) that conveys pulverized fuel such as pulverized coal from the pulverizer.

A plurality of ribs (reinforcing members) 172 are provided on the outer peripheral surface of the fuel pipe 162 so as to protrude radially outward of the fuel pipe 162 . A plurality of ribs 172 are provided at different positions in the longitudinal axis direction of the fuel pipe 162 (in this embodiment, two positions inside and outside the furnace). Specifically, the rib 172 prevents the fuel tube 162 from yielding due to deflection due to its own weight, and interferes with the oxidizer tube 163 even if the fuel tube 162 is deflected due to its own weight when viewed from the side in the longitudinal direction of the fuel tube 162 . Place it in a position where it does not The rib 172 is fixed on the outer peripheral surface of the fuel pipe 162 by, for example, welding.
Note that the positions at which the ribs 172 are provided in the longitudinal direction of the fuel pipe 162 are not limited to two. It may be installed at a position that can appropriately support the bending of the fuel pipe 162 due to its own weight, and for example, it may be installed at only one location near the inside of the furnace.

The projecting ends of the ribs 172 are all located near the inner peripheral surface of the oxidant tube 163 and are not fixed to the inner peripheral surface of the oxidant tube 163 . As shown in FIG. 3A, the corners of the ribs 172 are chamfered, more preferably chamfered into smooth curved surfaces in a side cross-sectional view. That is, the rib 172 has, for example, a semicylindrical shape in a side cross-sectional view. By providing a plurality of ribs 172 on the outer peripheral surface of the fuel pipe 162 in this manner, the fuel pipe 162 is supported from the inside of the oxidizer pipe 163 .

The oxidant pipe 163 covers the outer peripheral surface of the fuel pipe 162 with a predetermined space provided therebetween, and has an outer dimension larger than that of the fuel pipe 162 . An oxidant introduction flange portion 165 is provided on the side wall of the oxidant tube 163 on the outside of the furnace (on the right side of the paper surface of FIG. 3A). An oxidant such as air is introduced into the oxidant pipe 163 between the inner peripheral surface thereof and the outer peripheral surface of the fuel pipe 162 from an oxidant introducing flange portion 165 .

One end of the oxidant tube 163 extends through the seal box 169 and into the furnace wall 111 . A flange portion 163 a is provided in the vicinity of the end of the oxidizer pipe 163 opposite to the end connected to the seal box 169 . The flange portion 163a is connected to a flange portion 173 outside the furnace, and the fuel pipe 162 is fixed to the flange portion 173 by welding. The oxidant pipe 163 is provided with a flange portion 163b on the inner side of the furnace than the flange portion 163a, which can be connected to a flange portion 175 provided on the guide pipe 164 described later by means of bolts or the like.

The oxidant pipe 163 has an oxidant pipe expansion (displacement absorption) in a part (at least a part in the extending direction, two places in FIG. member) 166 is provided. The oxidant tube expansion 166 is a bendable and axially expandable tube.

The guide pipe 164 covers the outer peripheries of the fuel pipe 162 and the oxidant pipe 163 and has larger external dimensions than the oxidant pipe 163 . The guide tube 164 has an oxidizer tube 163 and a fuel tube 162 inside it. The guide pipe 164 is provided with a flange portion 175 connected to the flange portion 163b provided on the oxidizing agent pipe 163 described above at the end opposite to the one end fixed to the seal box 169 . Further, the guide pipe 164 is provided with a flange portion 176 on the inner side of the furnace than the flange portion 175, which can be connected to the flange portion 171b of the support pipe 171 by bolts or the like.

A space (not shown) between the inner peripheral surface of the guide tube 164 and the outer peripheral surface of the oxidant tube 163 is provided on the outer cylinder wall between the flanges 175 and 176 of the guide tube 164 . A non-oxidizing gas introduction pipe 177 for introducing inert gas and a flange portion 178 are provided so that inert gas can be supplied.

The guide tube 164 is provided with a guide tube expansion 167 at a portion (at least a portion in the extending direction, two locations in FIG. 3A) of the longitudinal axis exposed inside the support tube 171 and inside the annulus portion 115. there is The guide tube expansion 167 is a tube that can be bent and stretched in the axial direction like the oxidant tube expansion 166 .

Next, referring to FIGS. 3B to 3D, the rib structure of this embodiment will be described in more detail.
FIG. 3B is a cross-sectional view taken along line AA of FIG. 3A. FIG. 3C is an enlarged view of the guide tube, oxidant tube, and fuel tube in FIG. 3B. FIG. 3D is an enlarged view of a portion surrounded by a two-dot chain line in FIG. 3C. 3B to 3D that are the same as in FIG. 3A are denoted by the same reference numerals as in FIG. 3A, and detailed description thereof will be omitted.

As shown in FIGS. 3B and 3C, in this embodiment, on the inside of the fuel pipe 162, ribs 172 project from the center of the fuel pipe 162 in the vertical and horizontal directions on the outer peripheral surface of the fuel pipe 162 to form four cross-shaped ribs. There are places. Although not shown, on the outside of the fuel pipe 162, similarly, four ribs 172 are provided in a cross shape so as to protrude from the center of the fuel pipe 162 in the vertical and horizontal directions on the outer peripheral surface. Since the ribs 172 are provided at four locations in a cross shape projecting vertically and horizontally on the outer peripheral surface, even if the fuel pipe 162 is installed while rotating about the longitudinal axis direction, any rib 172 will not be in contact with the fuel pipe. Deflection due to the weight of 162 can be reliably supported. The ribs 172 are not limited to being provided at four locations as long as they can support the deflection of the fuel pipe 162 due to its own weight. For example, the ribs 172 may be provided at two locations on the outer peripheral surface so as to protrude in the vertical direction by controlling the rotational installation direction about the longitudinal axis of the fuel pipe 162 .

In order to suppress deformation and interference of the fuel pipe 162 due to an increase in the amount of bending of the fuel pipe 162, a clearance of about 1 mm to 5 mm ( gap) is provided. As a result, even when the fuel pipe 162 is bent due to its own weight, it is supported by the ribs 172 .

As shown in FIGS. 3B and 3C, corners of the ribs 172 are chamfered in a front sectional view. More specifically, as shown in FIG. 3D, the protruding ends of the ribs 172 are chamfered to form an R portion, which is chamfered into a smooth curved surface. That is, the protruding ends of the ribs 172 are chamfered at all the corners on the inner peripheral surface side of the oxidizer tube 163, and more preferably rounded to form a smooth curved surface. Therefore, when the rib 172 contacts the inner peripheral surface of the oxidant tube 163, the rib 172 and the inner peripheral surface of the oxidant tube 163 are in point contact. As a result, the protruding end of the rib 172 supports the fuel pipe 162 as a free end in supporting the bending of the fuel pipe 162 due to its own weight. Also, in order to absorb the difference in thermal expansion between the fuel pipe 162 and the oxidant pipe 163, the projecting end of the rib 172 supports the fuel pipe 162 as a free end.

[Burner system]
Next, a burner system according to this embodiment will be described.
In addition, below, although the thing provided with the control part which controls the burner 161 shown to FIG. 3A as an example as a burner system is demonstrated, it is not limited to this.

The burner system of this embodiment includes the above-described burner 161 and control for adjusting the tip position of the burner 161 protruding inside the furnace wall 111 when the fuel tube 162 is inserted into the oxidizer tube 163. A portion 179 is provided. The control unit 179 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a computer-readable storage medium, and the like. A series of processes for realizing various functions is stored in a storage medium or the like in the form of a program, for example, and the CPU reads out this program to a RAM or the like, and executes information processing and arithmetic processing. As a result, various functions are realized. The program may be pre-installed in a ROM or other storage medium, provided in a state stored in a computer-readable storage medium, or delivered via wired or wireless communication means. etc. may be applied. Computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like.

In the above burner system, when performing maintenance on the burner 161, first, the control unit 179 causes the fuel pipe to move toward the inside of the furnace wall 111 along the longitudinal axis direction using an inserting/removing device such as a driving cylinder (not shown). 162 is withdrawn from the interior of oxidant tube 163 . After the fuel pipe 162 is pulled out from the inside of the oxidant pipe 163, maintenance of the fuel pipe 162 is performed. After the maintenance of the fuel pipe 162 is completed, the control unit 179 adjusts the insertion/removal amount of the fuel pipe 162 and inserts the fuel pipe 162 into the oxidant pipe 163 to a predetermined tip position. back inside the In this manner, the control unit 179 controls progress and stoppage of insertion and removal of the fuel pipe 162 .

[Burner maintenance method]
Next, a burner maintenance method according to the present embodiment will be described.
In addition, although the case where maintenance is performed using the burner 161 shown in FIG. 3A will be described below as an example, the present invention is not limited to this.

(Extraction process)
In the extraction step, the furnace-outside flange portion 173 welded to the fuel pipe 162 is removed from the flange portion 163 a , and the fuel pipe 162 is pulled out from the oxidizer pipe 163 . After the fuel pipe 162 is pulled out from the inside of the oxidant pipe 163, maintenance of the fuel pipe 162 is performed.

(Insertion process)
After the maintenance of the fuel pipe 162 is completed, the insertion process is performed to return the fuel pipe 162 to the inside of the oxidizer pipe 163, and then the flange portion 173 outside the furnace welded and fixed to the fuel pipe 162 and the flange portion 163a are connected and fixed. do. In the inserting step, the fuel tube 162 is inserted into the oxidizer tube 163 .

With the configuration described above, according to this embodiment, the following effects are obtained.
In the burner 161 of the present embodiment, a plurality of ribs 172 are provided on the outer peripheral surface of the fuel pipe 162, and one or more of the plurality of ribs 172 are located on the inner peripheral surface side of the oxidant pipe 163. The corners are chamfered. Ribs 172 are used, for example, to support fuel tube 162 . In this way, since the ribs 172 with chamfered corners are provided, when the fuel pipe 162 is inserted into and removed from the oxidizer pipe 163 during maintenance of the fuel pipe 162, the ribs 172 do not interfere with the oxidizer pipe 163 (in particular, the oxidizer pipe 163). The fuel pipe 162 can be easily inserted and removed without being caught by the fuel pipe expansion 166). Therefore, maintenance work for the burner 161 is facilitated. In addition, since the rib 172 with the chamfered corner and the inner peripheral surface of the oxidant tube 163 come into point contact with each other, the fuel tube 162 is rotatably supported by the inner peripheral surface of the oxidant tube 163 via the rib 172. , the generation of a large bending moment in the fuel tube 162 can be prevented. Further, for example, it is known in advance which rib 172 will be caught by the oxidant pipe 163 when the fuel pipe 162 is inserted and removed, and the fuel pipe 162 is supported more by this rib 172 than other ribs 172. If known, only ribs 172 that hook into oxidant tube 163 may be chamfered. This eliminates the need to chamfer all of the ribs 172 provided on the fuel pipe 162 .

Further, if all the corners of the ribs 172 provided on the outer peripheral surface of the fuel pipe 162 on the inner peripheral surface side of the oxidant pipe 163 are chamfered, the fuel pipe 162 can be replaced with the oxidant pipe during maintenance of the fuel pipe 162. Since the chamfered portion of the rib 172 contacts smoothly when it is inserted into or removed from 163 , it is possible to more reliably prevent it from being caught on the oxidizer tube 163 . In addition, since the rib 172 with the chamfered corners and the inner peripheral surface of the oxidant tube 163 always come into point contact, the fuel tube 162 is always rotatably supported by the inner peripheral surface of the oxidant tube 163 via the rib 172 . The occurrence of a large bending moment in the fuel pipe 162 can be more reliably prevented.

In the burner system of the present embodiment, the fuel pipe 162 is inserted into the oxidant pipe 163 at a predetermined position by the controller 179 for reasons such as maintenance, or the fuel pipe 162 is pulled out from the inside of the oxidant pipe 163. Therefore, even if control is performed to move the rib 172 toward the inside of the furnace wall 111 along the longitudinal axis using an inserting/removing device such as a driving cylinder (not shown), the rib 172 can be inserted/removed without being caught by the oxidant tube 163 . can do. Therefore, with such a burner system, it is easy to adjust the position of the burner tip of the burner 161 protruding inside the furnace wall, thereby improving maintainability.

Further, in the burner maintenance method of the present embodiment, a plurality of ribs 172 are provided on the outer peripheral surface of the fuel pipe 162 , and one or more of the plurality of ribs 172 are located on the inner peripheral surface side of the oxidant pipe 163 . A burner 161 with chamfered corners in the plane of is used. Since the burner 161 having the ribs 172 with chamfered corners is used in this way, when the fuel pipe 162 is inserted into and pulled out of the oxidizer pipe 163 during maintenance of the fuel pipe 162, the ribs 172 are not in contact with the oxidizer pipe 163 (in particular, the oxidizer pipe 163). The fuel pipe 162 can be easily inserted and removed without being caught by the oxidant pipe expansion 166). Therefore, maintenance of the burner 161 is facilitated. In addition, since the rib 172 with the chamfered corner and the inner peripheral surface of the oxidant tube 163 come into point contact with each other, the fuel tube 162 is rotatably supported by the inner peripheral surface of the oxidant tube 163 via the rib 172. , the generation of a large bending moment in the fuel tube 162 can be prevented.

In the above-described embodiment, the four ribs 172 are provided so as to protrude from the center of the fuel pipe 162 vertically and horizontally on the outer peripheral surface of the fuel pipe 162. However, the present invention is not limited to this. . More specifically, the ribs 172 may be provided at two locations so as to protrude from the center of the fuel pipe 162 in the vertical direction of the outer peripheral surface. In addition, it is not necessary to provide two positions (two positions inside and outside the furnace) at different positions in the longitudinal direction of the fuel pipe 162, and only one position may be provided at a position that can appropriately support the deflection of the fuel pipe 162 due to its own weight. .

Further, in the above-described embodiment, all the ribs 172 provided on the fuel pipe 162 have chamfered corners on the inner peripheral surface side of the oxidizer pipe 163 as an example. is not limited to Specifically, one or more of the ribs 172 provided on the fuel pipe 162 that support the deflection of the fuel pipe 162 due to its own weight are chamfered at the corners on the inner peripheral surface side of the oxidant pipe 163 . Just do it. Also, with respect to the chamfered ribs 172, it is not necessary to chamfer all the corners of the surface on the inner peripheral surface side of the oxidizer tube 163, and at least a portion thereof is chamfered so as to obtain the necessary effect. , when the fuel pipe 162 is inserted into or removed from the oxidant pipe 163, the chamfered portion of the rib 172 does not catch on the oxidant pipe 163, and the rib 172 and the inner peripheral surface of the oxidant pipe 163 are in point contact and rotate. It would be nice if it was supported.

Further, the burner of the present disclosure can be applied as long as it has a multi-tube structure, and can also be applied to, for example, a light oil burner.

Further, in the above-described embodiment, an IGCC equipped with a coal gasification furnace that generates combustible gas from pulverized coal has been described as an example. It can also be applied to other carbon-containing solid fuels such as grasses, wastes, sludge, and biomass fuels such as tires that are gasified. In addition, the gasifier equipment of the present disclosure is applicable not only to power generation but also to chemical plant gasifiers for obtaining desired chemical substances.

In addition, in the above-described embodiment, coal is used as fuel, but other carbon-containing solid fuels such as high-grade coal and low-grade coal are also applicable. It may be biomass used as an organic resource derived from, for example, thinned wood, waste wood, driftwood, grass, waste, sludge, tires, and recycled fuel (pellets and chips) made from these raw materials. It is also possible to use

In this embodiment, a tower-type gasification furnace has been described as the gasification furnace 101. However, even if the gasification furnace 101 is a crossover-type gasification furnace, the vertical direction of each device in the gasification furnace 101 is generated. Similar implementation is possible by replacing the gas so as to match the gas flow direction.

10 Integrated coal gasification combined cycle facility (combined gasification combined cycle facility)
11 Coal feed facility 11a Coal feed line 14 Gasification furnace facility 15 Char recovery facility 16 Gas refining facility 17 Gas turbine 18 Steam turbine 19 Generator 20 Exhaust heat recovery boiler 41 Compressed air supply line 42 Air separation facility 43 First nitrogen supply line 45 Second nitrogen supply line 46 Char return line 47 Oxygen supply line 48 Foreign matter removal equipment 49 Generated gas line 51 Dust collection equipment 52 Supply hopper 53 Gas discharge line 61 Compressor 62 Combustor 63 Turbine 64 Rotary shaft 65 Compressed air supply line 66 Fuel gas supply line 67 Combustion gas supply line 68 Booster 69 Turbine 70 Exhaust gas line 71 Steam supply line 72 Steam recovery line 73 Condenser 74 Gas purification equipment 75 Chimney 101 Gasification furnace 102 Singa cooler 110 Pressure vessel 110a Pressure vessel side opening Part 111 gasification furnace wall (furnace wall)
115 annulus section 116 combustor section 117 diffuser section 118 reductor section 121 gas discharge port 122 slag hopper 126 burner 127 burner 131 evaporator 132 superheater 134 economizer 144 internal space 146 external space 161 burner 162 fuel pipe (burner main pipe)
163 oxidizer tube (air tube)
163a flange portion 163b flange portion 164 guide pipe 165 oxidant introduction flange portion 166 oxidant pipe expansion (displacement absorbing member)
167 Expansion for guide tube 169 Seal box 170 Flame stabilizer (swirler)
171 support pipe 171a flange portion 171b flange portion 172 rib (reinforcing material)
173 Flange portion 175 Flange portion 176 Flange portion 177 Non-oxidizing gas introduction pipe 178 Flange portion 179 Control portion L Length

Claims (6)

a fuel pipe for conveying fuel;
an oxidant pipe that covers the outer peripheral surface of the fuel pipe and introduces an oxidant between itself and the outer peripheral surface of the fuel pipe;
a displacement absorbing member provided on at least part of the extending direction of the oxidant tube;
with
A plurality of ribs are provided on the outer peripheral surface of the fuel pipe so as to protrude radially outward of the fuel pipe,
At least one of the plurality of ribs, in a front cross-sectional view, has a corner portion on the inner peripheral surface side of the oxidant tube that is aligned with the rib when the rib contacts the inner peripheral surface of the oxidant tube. and the inner peripheral surface of the oxidant tube are chamfered into a curved surface so that they are in point contact with each other . 2. The burner according to claim 1, wherein all of said plurality of ribs have chamfered corners on the inner peripheral surface side of said oxidizer tube. A burner according to claim 1 or claim 2;
a control unit that controls the insertion of the fuel pipe into the oxidizer pipe or the removal of the fuel pipe from the oxidizer pipe while managing the position of the fuel pipe;
burner system with A burner according to claim 1 or claim 2;
a gasification furnace to which pulverized fuel is supplied from the burner;
gasifier equipment. The gasification furnace equipment according to claim 4;
a gas turbine rotationally driven by burning at least part of the generated gas generated in the gasification furnace equipment;
a steam turbine rotationally driven by steam generated by a heat recovery steam generator that introduces turbine exhaust gas discharged from the gas turbine;
a generator coupled to the rotary drive of the gas turbine and/or the steam turbine;
Combined gasification combined cycle facility with a fuel pipe for conveying fuel;
an oxidant pipe that covers the outer peripheral surface of the fuel pipe and introduces an oxidant between itself and the outer peripheral surface of the fuel pipe;
a displacement absorbing member provided in at least part of the extending direction of the oxidizer tube;
A plurality of ribs are provided on the outer peripheral surface of the fuel pipe so as to protrude radially outward of the fuel pipe,
At least one of the plurality of ribs, in a front cross-sectional view, has a corner portion on the inner peripheral surface side of the oxidant tube that is aligned with the rib when the rib contacts the inner peripheral surface of the oxidant tube. and the inner peripheral surface of the oxidant tube are chamfered into a curved surface so that the inner peripheral surface of the oxidant tube is in point contact ,
a pulling step of pulling out the fuel tube from the inside of the oxidizer tube;
and an inserting step of inserting the fuel pipe into the oxidizer pipe.

Images