JP6847700B2 - Gasifier with burner and burner and how to install the burner - Google Patents

Description

The present invention relates to a burner used for a combustion furnace, a gasification furnace provided with a burner, and a method for mounting the burner.

The gasifier (combustion furnace) of the gasifier that gasifies carbon-containing fuel has a high temperature of over 1500 ° C., and the burner used in this gasifier is known as the one described in the prior art of Patent Document 1. Has been done.
In the prior art of Patent Document 1, the tip thereof is installed in a furnace. A burner cooling water pipe is wound around the burner supply pipe. The configuration in which this burner cooling water pipe is installed in contact with the periphery of the burner supply pipe and is provided from the tip of the burner supply pipe to the outside of the furnace is disclosed. Cooling water flows inside the burner cooling water pipe to cool the burner supply pipe.

Japanese Patent No. 5968247

In such a burner, the amount of protrusion of the tip of the burner supply pipe into the furnace is an important factor for determining the combustion state in the furnace by the burner, and therefore needs to be accurately controlled. Further, in order to protect the burner supply pipe from the heat of combustion generated by the flame formed in the furnace, cooling water is flowed into the burner cooling pipe. The positional relationship between the burner supply pipe and the burner cooling water pipe has a great influence on the cooling performance of the burner supply pipe and the like. Furthermore, in the vicinity of the inner tip of the burner, the burner cooling pipe is affected by wear caused by pulverized coal ejected from the burner to ensure cooling performance. Therefore, the arrangement of the burner supply pipe and the burner cooling water pipe is highly accurate. Installation is required.

In the configuration of Patent Document 1, since the burner supply pipe and the burner cooling water pipe are separated, when the burner supply pipe and the burner cooling water pipe are attached to the combustion furnace, the burner supply pipe and the burner cooling water pipe are connected at the site. There is a problem that it is necessary to perform high-precision alignment and it takes a lot of time for the mounting process at the site.

The present invention has been made in view of such circumstances, and provides workability when installing an oxidant supply pipe and a cooling pipe of a burner that supplies fuel and an oxidant to a combustion furnace of a gasification furnace or the like. It is an object of the present invention to provide a burner and a gasifier equipped with a burner and a method of mounting the burner which can be improved.

In order to solve the above problems, the following means are adopted as the burner of the present invention, the gasification furnace provided with the burner, and the method of mounting the burner.
The burner according to one aspect of the present invention includes an oxidant supply pipe that supplies an oxidant into the furnace, a fuel supply pipe that is arranged on a coaxial line in the oxidant supply pipe and supplies fuel and an oxidant, and the oxidation. It is provided with a cooling pipe provided so as to surround the agent supply pipe, and a flange to which the oxidant supply pipe and the cooling pipe are fixed and detachably fixed to the furnace wall.

In the above configuration, since the oxidant supply pipe and the cooling pipe are fixed to the flange, the supply pipe and the cooling pipe can be installed in the furnace only by fixing the flange to the furnace wall. Further, since the oxidant supply pipe and the cooling pipe are fixed to the flange, the oxidant supply pipe and the cooling pipe can be transported in a state of being arranged at a desired relative position. As a result, the place where the oxidant supply pipe and the cooling pipe are arranged at desired relative positions and the place where the oxidant supply pipe and the cooling pipe are installed in the combustion furnace of the gasification furnace can be set as separate places. it can. Therefore, for example, when the oxidant supply pipe and the cooling pipe are fixed to the flange in the factory, the flange is fixed to the furnace wall at the site where the oxidant supply pipe and the cooling pipe are installed in the combustion furnace of the gasifier. Only by itself, the oxidant supply pipe and the cooling pipe can be installed in the gasifier at a desired relative position. Therefore, it is possible to omit the work of adjusting the relative positions of the supply pipe and the cooling pipe at the site. Therefore, workability when installing the oxidant supply pipe and the cooling pipe in the gasification furnace can be improved.
Further, since the flange is detachably fixed to the furnace wall, when replacing the oxidant supply pipe or the cooling pipe, the flange can be easily removed from the furnace wall and can be easily replaced. ..

Further, in the burner according to one aspect of the present invention, the tip of the cooling pipe inside the furnace is located inside the furnace by a predetermined length from the tip of the oxidizing agent supply pipe inside the furnace. You may.

In the above configuration, the tip of the cooling pipe is located inside the furnace by a predetermined length from the tip of the oxidant supply pipe. Even in such a burner where high accuracy is required for the relative positioning of the oxidant supply pipe and the cooling pipe, the place where the oxidant supply pipe and the cooling pipe are arranged at a desired relative position and the oxidant The place where the supply pipe and the cooling pipe are installed in the combustion furnace of the gasifier can be set as a separate place. Therefore, for example, when the oxidant supply pipe and the cooling pipe are fixed to the flange in the factory, the workability should be further improved at the site where the oxidant supply pipe and the cooling pipe are installed in the combustion furnace of the gasification furnace. Can be done.

The gasifier according to one aspect of the present invention includes the above burner. In such a gasification furnace, workability when installing the oxidant supply pipe and the cooling pipe can be improved. In addition, the oxidant supply pipe and the cooling pipe can be easily replaced.

The method of attaching the burner according to one aspect of the present invention is to supply an oxidant fuel, which is arranged on a coaxial line in the oxidant supply pipe for supplying the oxidant into the furnace and the oxidant supply pipe, and supplies the fuel and the oxidant. A pipe, a cooling pipe provided so as to surround the oxidant supply pipe, and a flange to which the oxidant supply pipe and the cooling pipe are fixed and detachably fixed to the furnace wall are provided. The burner mounting method includes a supply pipe fixing step of fixing the oxidant supply pipe to the flange, a cooling pipe fixing step of fixing the cooling pipe to the flange, a supply pipe fixing step, and the above. After the cooling pipe fixing step, there is a flange fixing step of detachably fixing the flange to the furnace wall, and the oxidant supply pipe and the cooling pipe are placed in the furnace by the flange fixing step. Manage the protruding position.

In the above configuration, since the oxidant supply pipe and the cooling pipe are fixed to the flange, the oxidant supply pipe and the cooling pipe can be installed in the combustion furnace of the gasification furnace or the like simply by fixing the flange to the furnace wall. .. Further, since the oxidant supply pipe and the cooling pipe are fixed to the flange and then the flange is fixed to the furnace wall, the oxidant supply pipe and the cooling pipe must be transported in a desired relative position. Can be done. Therefore, it is not necessary that the place where the oxidant supply pipe and the cooling pipe are arranged at desired relative positions and the place where the oxidant supply pipe and the cooling pipe are installed in the gasifier are the same place, and they are different places. It is not necessary that the place where the oxidant supply pipe and the cooling pipe are arranged at a desired relative position is near the gasifier. Therefore, workability when installing the oxidant supply pipe and the cooling pipe in the gasification furnace can be improved.
Further, since the flange is detachably fixed to the furnace wall, when replacing the oxidant supply pipe and the cooling pipe, the flange can be easily removed from the furnace wall and can be easily replaced. ..

Further, the method for attaching the burner according to one aspect of the present invention includes a transport step of transporting the oxidant supply pipe and the flange to which the cooling pipe is fixed, and the supply pipe fixing step and the cooling pipe fixing step. May be performed at the factory, and the flange fixing step may be performed at the site where the oxidant supply pipe and the cooling pipe are installed in the combustion furnace having the furnace wall after the transportation step.

In the above configuration, the oxidant supply pipe and the cooling pipe are fixed to the flange at the factory and transported in the fixed state. Therefore, the site where the oxidant supply pipe and the cooling pipe are installed in the combustion furnace of the gasifier or the like. Then, the oxidant supply pipe and the cooling pipe can be installed in the gasification furnace at desired relative positions simply by fixing the flange to the furnace wall. Therefore, the work of adjusting the relative positions of the oxidant supply pipe and the cooling pipe at the site can be omitted, and the workability when installing the oxidant supply pipe and the cooling pipe in the gasifier can be suitably improved. Can be done.

According to the present invention, it is possible to improve workability when installing a supply pipe and a cooling pipe of a burner that supplies fuel and an oxidant to a combustion furnace of a gasification furnace or the like.

It is a vertical sectional view of the burner which concerns on embodiment of this invention. It is a side view of the burner of FIG. It is a schematic block diagram of the gasification furnace which concerns on embodiment of this invention.

Hereinafter, an embodiment of a gasifier having a burner and a burner and a method for mounting the burner according to the present invention will be described with reference to FIGS. 1 to 3.
The burner according to the present embodiment is provided in the coal gasification furnace (gasification furnace) 30 or the like shown in FIG.

The coal gasification furnace 30 is formed so as 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 is from the lower side to the upper side in the vertical direction. It is circulating toward. The coal gasification furnace 30 has a pressure vessel 110 and a gasification furnace wall (furnace wall) 111 provided inside the pressure vessel 110. The coal gasification furnace 30 forms an annulus portion 115 in the space between the pressure vessel 110 and the gasification furnace wall 111. Further, in the space inside the gasification furnace wall 111, the coal gasifier 30 has a combiner portion 116, a diffuser portion 117, and a reducer portion in order from the lower side in the vertical direction (that is, the upstream side in the distribution direction of the produced gas). It forms 118.

The pressure vessel 110 is formed in a tubular shape having a hollow space inside, and a gas discharge port 121 is formed at the upper end portion, while a slug hopper 122 is formed at the lower end portion (bottom portion). The gasification furnace wall 111 is formed in a tubular shape having a hollow space inside, and the wall surface thereof is provided so as to face the inner surface of the pressure vessel 110. In the present embodiment, the pressure vessel 110 is formed in a cylindrical shape, and the diffuser portion 117 of the gasification furnace wall 111 is also formed in a cylindrical shape. The gasification furnace wall 111 is connected to the inner surface of the pressure vessel 110 by a support member (not shown).

The gasifier wall 111 separates the inside of the pressure vessel 110 into an internal space 154 and an external space 156. As will be described later, the gasification furnace wall 111 has a shape in which the cross-sectional shape changes at the diffuser portion 117 between the convertor portion 116 and the reducer portion 118. The upper end of the gasifier wall 111 on the vertically upper side is connected to the gas discharge port 121 of the pressure vessel 110, and the lower end thereof on the vertically lower side is provided with a gap from the bottom of the pressure vessel 110. ing. The stored water is stored in the slug hopper 122 formed at the bottom of the pressure vessel 110, and the lower end of the gasification furnace wall 111 is flooded with the stored water to seal the inside and outside of the gasification furnace wall 111. It's stopped. Burners 126 and 127 are inserted into the gasification furnace wall 111, and a sink gas cooler 102 is arranged in the internal space 154. The structure of the gasification furnace wall 111 will be described later.

The annular portion 115 is a space formed inside the pressure vessel 110 and outside the gasification furnace wall 111, that is, an external space 156, and nitrogen, which is an inert gas separated by the air separation facility 42, is nitrogen (not shown). It is supplied through the supply line. Therefore, the annulus portion 115 becomes a space filled with nitrogen. A pressure equalizing pipe (not shown) for equalizing the pressure inside the gasification furnace 101 is provided near the upper portion of the annulus portion 115 in the vertical direction. The pressure equalizing pipe in the furnace is provided so as to communicate the inside and outside of the gasification furnace wall 111, and the pressure between the inside (combustor part 116, diffuser part 117 and reducer part 118) and the outside (annulus part 115) of the gasification furnace wall 111. The pressure is approximately equalized so that the difference is within a predetermined pressure.

The combustor section 116 is a space for partially burning pulverized coal, char, and air, and a combustion device composed of a plurality of burners 126 is arranged on the gasification furnace wall 111 of the combustor section 116. The high-temperature combustion gas obtained by burning the pulverized coal and a part of the char in the converter section 116 passes through the diffuser section 117 and flows into the reducer section 118.

The reducer section 118 is maintained at a high temperature state required for the gasification reaction, supplies pulverized coal to the combustion gas from the convertor section 116 and partially burns the pulverized coal to volatile components (carbon monoxide, hydrogen, lower hydrocarbons, etc.). ), Which is gasified to generate a generated gas, and a combustion device composed of a plurality of burners 127 is arranged on the gasification furnace wall 111 of the reducer portion 118.

The thin gas cooler 102 is provided inside the gasification furnace wall 111, and is provided above the burner 127 of the reducer portion 118 in the vertical direction. The thin gas cooler 102 is a heat exchanger, and the evaporator (evaporator) 131, the superheater (superheater) 132, and the nodes are in order from the lower side in the vertical direction (upstream side in the distribution direction of the generated gas) of the gasifier wall 111. A charcoal (economizer) 134 is arranged. These thin gas coolers 102 cool the generated gas by exchanging heat with the generated gas generated in the reducer portion 118. Further, the number of the evaporator (evaporator) 131, the superheater (superheater) 132, and the economizer (economizer) 134 is not limited as shown in the figure.

Here, the operation of the gasifier 30 will be described.
In the coal gasification furnace 30, nitrogen and pulverized coal are charged and ignited by the burner 127 of the reducer portion 118, and pulverized coal, char and compressed air (oxygen) are charged and ignited by the burner 126 of the combustor portion 116. To. Then, in the convertor section 116, high-temperature combustion gas is generated by combustion of pulverized coal and char. Further, in the convertor portion 116, molten slag is generated in high temperature gas by combustion of pulverized coal and char, and the molten slag adheres to the gasification furnace wall 111 and falls to the bottom of the furnace, and finally in the slug hopper 122. It is discharged to the water storage. Then, the high-temperature combustion gas generated in the converter section 116 rises to the reducer section 118 through the diffuser section 117. In this reducer unit 118, the pulverized coal is maintained at a high temperature state required for the gasification reaction, the pulverized coal is mixed with the high temperature combustion gas, and the pulverized coal is partially burned in a high temperature reducing atmosphere to carry out the gasification reaction, and the generated gas is produced. Is generated. The gasified generated gas flows from the lower side in the vertical direction to the upper side.

Next, the structure around the burner 2 according to the present embodiment will be described in detail with reference to FIGS. 1 and 2. The burner 2 according to the present embodiment is applied to, for example, a burner 126 or a burner 127 (see FIG. 3) provided on a gasifier wall 111 in a combustion furnace such as a convertor portion 116 or a reducer portion 126 of a coal gasification furnace 30. Will be done.

As shown in FIG. 3, the coal gasifier 30 partially burns pulverized coal and char (unreacted coal and ash) pulverized by a coal crusher (not shown) with an oxidizing agent to produce gas (flammable). Gas) is obtained. In this embodiment, air is used as the oxidizing agent. The combustion furnace 1 generates combustion heat by burning pulverized coal or char, and supplies the amount of heat required for the gasification reaction in the reducer portion 118 located on the downstream side and the amount of heat for melting the slag. ..

As described above, a plurality of burners 2 are provided around the combustion furnace 1, and one of the burners 2 is shown in FIGS. 1 and 2. The burner 2 is inserted through an opening 3 formed in the gasification furnace wall 111 (see FIG. 3). The gasification furnace wall 111 includes a plurality of furnace wall pipes 4 (one of which is illustrated in FIG. 1) extending vertically and vertically and provided in parallel. Cooling water flows into the furnace wall pipe 4. The opening 3 formed in the gasification furnace wall 111 is formed by bending a part of the furnace wall pipe 4 to the outside (right side in FIG. 1) and to the side.

The burner 2 is a closed flange (flange) to which a supply pipe 5 arranged from the outside of the furnace to the inside of the furnace, a cooling pipe 6 wound around the supply pipe 5, and the supply pipe 5 and the cooling pipe 6 are fixed. ) 7 and.

The supply pipe 5 is an air supply pipe (oxidizing agent supply pipe) 8 constituting the outer diameter of the supply pipe 5 and an annular ring extending from the outer peripheral surface of the outer end of the furnace of the air supply pipe 8 in a direction orthogonal to the outer peripheral surface. It has a plate-shaped supply pipe flange portion 10. Inside the air supply pipe 8, a fuel supply pipe 9 that extends in the same direction as the air supply pipe 8 and has a common axial center in the longitudinal direction is installed. The tip inside the furnace of the fuel supply pipe 9 is located outside the furnace so as to recede from the inside of the furnace with respect to the tip inside the furnace of the air supply pipe 8, and pulverized coal and char are transported into the fuel supply pipe 9 as fuel. It is distributed together with the primary air for use from a fuel gas supply line (not shown). Further, the outer surface of the fuel supply pipe 9 and the inner surface of the air supply pipe 8 are arranged so as to be separated from each other, and air (secondary air) is provided in the space between the outer surface of the fuel supply pipe 9 and the inner surface of the air supply pipe 8. Is now in circulation. The supply pipe flange portion 10 is formed with a bolt insertion hole 11 for fixing with a bolt (not shown) to the outer furnace pipe flange portion 13 described later. A flame is formed in the furnace by the fuel and air supplied from the supply pipe 5.

The outer end of the air supply pipe 8 is connected to the outer furnace pipe 12 arranged outside the furnace. The outer diameter of the outer furnace pipe 12 is slightly smaller than the inner diameter of the air supply pipe 8, and the end of the outer furnace pipe 12 is inserted into the air supply pipe 8, so that the air supply pipe 8 and the outer furnace pipe 8 are formed. 12 is connected. An annular plate-shaped flange portion 13 extending in a direction orthogonal to the outer peripheral surface is provided on the outer peripheral surface of the outer furnace pipe 12. The fixing portion A1 between the outer furnace pipe 12 and the outer furnace pipe flange portion 13 is fixed by welding. The outer furnace pipe flange portion 13 is formed with a bolt insertion hole 14 for fixing the supply pipe flange portion 10 and bolts (not shown).

The cooling pipe 6 has a cooling water (cooling medium) flowing inside, and has a first cooling pipe 15 and a second cooling pipe 16 located outside the furnace with respect to the first cooling pipe 15. The first cooling pipe 15 is arranged so as to spirally surround the supply pipe 5 in a state of being in contact with the outer peripheral surface of the supply pipe 5 (air supply pipe 8). The tip of the first cooling pipe 15 inside the furnace is arranged so as to protrude inside the furnace by the extension length L1 (see FIG. 1) from the tip of the supply pipe 5. As will be described later, after the burner 2 is attached to the fixing member 22 fixed to the seal box 20 by the closing flange 7, the second cooling pipe 16 is welded and connected to the upstream end and the downstream end of the first cooling pipe 15. It is connected continuously by. That is, the first cooling pipe 15 and the second cooling pipe 16 are a series of continuous cooling pipes 6. The cooling pipe 6 is formed of, for example, a Ni-based alloy or a Ni-containing alloy (Inconel 625 or the like) from the viewpoint of corrosion resistance and resistance to thermal fatigue due to repeated thermal stress.

As shown in FIG. 2, the closing flange 7 is an annular plate-shaped member, and a supply pipe insertion hole 17 for inserting the supply pipe 5 is formed in a substantially central portion thereof. The closing flange 7 is made of, for example, stainless steel (SUS316L or the like) because of its heat resistance and corrosion resistance. Further, on the outer peripheral side of the supply pipe insertion hole 17, for example, two cooling pipe insertion holes 18 for inserting the cooling pipe 6 are formed above and below the paper surface. Further, on the outer peripheral side of the cooling pipe insertion hole 18, a plurality of (for example, 16 bolt insertion holes 19 in this embodiment) bolt insertion holes 19 are formed along the outer circumference. The bolt insertion hole 19 is a hole for fixing the fixing member 22 fixed to the seal box 20 described later and the closing flange 7.

A seal box 20 is provided on the outside of the furnace so as to cover the opening 3 formed by the furnace wall tube 4. The seal box 20 is made of stainless steel, for example. The seal box 20 is filled with a refractory material 21. As the refractory material 21, for example, alumina or silica is preferably used. The seal box 20 and the refractory material 21 maintain the pressurized pressure inside the furnace, and radiation and slag leaking out of the furnace through the gap between the burner 2 and the opening 3 can further leak to the outside. Can be prevented.

A fixing member 22 for connecting the seal box 20 and the closing flange 7 is provided on the outer surface of the seal box 20. The fixing member 22 has a cylindrical portion 23 that is welded and fixed to a fixing portion A2 provided on the outer surface of the furnace of the seal box 20 and extends in the outer direction of the furnace, and the outer side of the furnace of the seal box 20 from the outer end of the cylindrical portion 23. It has a fixing member flange portion 24 extending on the surface of the above. The fixing member flange portion 24 is formed with a bolt insertion hole 25 for fixing to the closing flange 7.

Next, a fixed mode of the burner 2 in the present embodiment will be described.
Each part of the burner 2 is fixed with reference to the closing flange 7. The fixing portion A3 between the closing flange 7 and the supply pipe 5 is fixed by welding. That is, the closing flange 7 and the outer surface of the supply pipe 5 are welded and fixed in a state where the supply pipe 5 (air supply pipe 8) is inserted into the supply pipe insertion hole 17 formed in the closing flange 7. The fixing portion A4 between the closing flange 7 and the cooling pipe 6 is welded and fixed. That is, the closing flange 7 and the outer surface of the cooling pipe 6 (first cooling pipe 15) are welded and fixed in a state where the cooling pipe 6 is inserted into the cooling pipe insertion hole 18 formed in the closing flange 7. In this way, the closing flange 7, the supply pipe 5, and the cooling pipe 6 are fixed by welding and fixed to form an integral structure. That is, the position of the furnace inner tip of the supply pipe 5 and the position of the furnace inner tip of the cooling pipe 6 (first cooling pipe 15) are fixed to the closing flange 7.

The closing flange 7 and the fixing member 22 are detachably fixed by bolts (not shown). Specifically, a bolt through which both insertion holes 19 and 25 are inserted in a state where the bolt insertion hole 19 formed in the closing flange 7 and the bolt insertion hole 25 formed in the fixing member flange portion 24 overlap each other (not shown). It is fastened and fixed by (omitted). Further, the supply pipe 5 and the outer furnace pipe 12 are detachably fixed by bolts (not shown). Specifically, both insertion holes 11 and 14 are inserted in a state where the bolt insertion hole 11 formed in the supply pipe flange portion 10 and the bolt insertion hole 14 formed in the furnace outer pipe flange portion 13 overlap each other. It is fastened and fixed with bolts (not shown).

The burner 2 having the above configuration is used as follows.
At the tip inside the furnace of the supply pipe 5, fuel and primary air supplied from a supply source (not shown) are ejected from the fuel supply pipe 9, and secondary air is ejected from the air supply pipe 8. The fuel and air ejected from the inner tip of the furnace of the supply pipe 5 are charged into the fuel region already formed in the furnace, and the desired combustion state is maintained. On the other hand, in order to protect the supply pipe 5 from the combustion radiant heat generated by the flame formed in the furnace, cooling water is flowed into the cooling pipe 6 to cool the protrusion inside the furnace of the supply pipe 5. The cooling water is supplied from a cooling water source (not shown), circulates in the cooling pipe 6, and then flows out to the outside.

Next, a method of attaching the burner 2 in the present embodiment will be described.
In the present embodiment, the steps (supply pipe fixing step and cooling pipe fixing step) of fixing the supply pipe 5 (air supply pipe 8) and the cooling pipe 6 to the closing flange 7 by welding the fixing points A3 and A4 are performed at the factory. Specifically, the tip of the first cooling pipe 15 inside the furnace protrudes inside the furnace with a predetermined extension length L1 (see FIG. 1) from the tip of the supply pipe 5 (air supply pipe 8). In addition, a step of position-controlling and fixing the supply pipe 5 and the cooling pipe 6 to the closing flange 7 is performed at the factory. After that, the closing flange 7 to which the supply pipe 5 and the cooling pipe 6 are fixed is transported to the site where the combustion furnace 1 is installed by a predetermined transportation means (transportation step). At the site, the closing flange 7 and the fixing member 22 are bolted, and the supply pipe 5 and the outer furnace pipe 12 are bolted to install the supply pipe 5 and the cooling pipe 6 in the combustion furnace 1 (flange). Fixing process).
After that, the second cooling pipe 16 is welded and fixedly connected to the upstream end and the downstream end of the first cooling pipe 15, and the cooling pipe 6 is continuously connected.
Further, in the supply pipe 5, a fuel supply pipe 9 is installed inside the air supply pipe 8 so as to extend in the same direction as the air supply pipe 8 and have a common axial center in the longitudinal direction. The tip of the fuel supply pipe 9 inside the furnace is installed and fixed so as to be retracted from the inside of the furnace by a predetermined length from the tip of the inside of the fire of the air supply pipe 8. At this time, since the air supply pipe 8 is fixed to the closing flange 7 by controlling the position, the alignment and installation of the fuel supply pipe 9 with the air supply pipe 8 can be performed more easily than before. It will be possible.

According to this embodiment, the following effects are exhibited.
In the present embodiment, since the supply pipe 5 and the cooling pipe 6 are fixed to the closing flange 7, the closing flange 7 is attached to the fixing member 22 fixed to the seal box 20 of the gasification furnace wall 111 (see FIG. 3). The supply pipe 5 and the cooling pipe 6 can be installed in the combustion furnace 1 simply by attaching and fixing. Further, since the supply pipe 5 and the cooling pipe 6 are fixed to the closing flange 7, the supply pipe 5 and the cooling pipe 6 can be transported while being arranged at desired relative positions. As a result, the place where the supply pipe 5 and the cooling pipe 6 are arranged and fixed at desired relative positions and the place where the supply pipe 5 and the cooling pipe 6 are installed in the combustion furnace 1 can be set as separate places. ..

In the present embodiment, the tip of the cooling pipe 6 inside the furnace protrudes inside the furnace by a predetermined extension length L1 (see FIG. 1) from the tip of the supply pipe 5 (air supply pipe 8). The supply pipe 5 is cooled by arranging it in. In such a structure, the cooling effect of the supply pipe 5 can be improved by lengthening the feed length L1, but if it is too long, the fuel (fine coal or pulverized coal) ejected from the fuel supply pipe 9 can be improved. The char) may collide with the protruding portion of the cooling pipe 6, cause powder and grain wear at the protruding portion, and damage the protruding portion. Therefore, the protrusion length L1 of the protruding portion of the cooling pipe 6 needs to be fixed with high accuracy of the mounting position so that a cooling effect can be obtained while preventing powder wear.

In the present embodiment, the steps of fixing the supply pipe 5 (air supply pipe 8) and the cooling pipe 6 to the closing flange 7 by welding the fixing points A3 and A4 are performed at the factory. That is, a step of adjusting the protrusion length L1 of the protruding portion of the cooling pipe 6, which requires high accuracy, to a desired length is performed at the factory. Then, the combustion furnace 1 is transported to the site where the combustion furnace 1 is installed while maintaining the desired extension length L1. Therefore, at the site where the supply pipe 5 and the cooling pipe 6 are installed in the combustion furnace 1, the supply pipe 5 and the cooling pipe 6 are placed in the combustion furnace 1 at a desired relative position simply by fixing the closing flange 7 to the fixing member 22. Can be installed. Therefore, it is possible to omit the work of adjusting the protrusion length L1 of the protruding portion of the cooling pipe 6 to a desired length at the site. Therefore, workability when installing the supply pipe 5 and the cooling pipe 6 in the combustion furnace 1 can be improved.

Further, since the closing flange 7 is detachably fixed to the gasification furnace wall 111, when the supply pipe 5 or the cooling pipe 6 is replaced for maintenance or the like, the removable closing flange 7 is used for the gasification furnace. It can be easily removed from the wall 111 and easily replaced.

The present invention is not limited to the invention according to each of the above embodiments, and can be appropriately modified without departing from the gist thereof. For example, in the present embodiment, the tip of the cooling pipe 6 inside the furnace is arranged so as to protrude inside the furnace by the extension length L1 from the tip of the supply pipe 5, but the nature of the supply pipe In consideration of heat resistance and cooling effect, the tip portion of the cooling pipe 6 inside the furnace may be arranged near the tip portion of the supply pipe 5 without protruding inside the furnace.

1 Combustion furnace 2 Burner 5 Supply pipe 6 Cooling pipe 7 Closing flange (flange)
8 Air supply pipe (oxidizer supply pipe)
9 Fuel supply pipe 10 Supply pipe flange part 12 Outer pipe 13 Outer pipe flange part 15 First cooling pipe 16 Second cooling pipe 20 Seal box 22 Fixing member 24 Fixing member Flange part 30 Coal gasification furnace (gasification furnace)
L1 shift length

Claims (5)

An oxidizer supply pipe that supplies the oxidizer into the furnace,
A fuel supply pipe arranged on a coaxial line in the oxidant supply pipe to supply fuel and an oxidant,
A cooling pipe provided so as to surround the oxidant supply pipe, and
A flange to which the oxidant supply pipe and the cooling pipe are fixed and detachably fixed to the furnace wall,
Burner with. The burner according to claim 1, wherein the tip of the cooling pipe inside the furnace is located inside the furnace by a predetermined length with respect to the tip of the oxidizing agent supply pipe inside the furnace. A gasifier having the burner according to claim 1 or 2. An oxidizer supply pipe that supplies the oxidizer into the furnace,
A fuel supply pipe arranged on the coaxial line in the supply pipe and supplying fuel and an oxidant,
A cooling pipe provided so as to surround the oxidant supply pipe, and
A flange to which the oxidant supply pipe and the cooling pipe are fixed and detachably fixed to the furnace wall,
It is a method of mounting a burner equipped with
A supply pipe fixing step of fixing the oxidant supply pipe to the flange,
A cooling pipe fixing step of fixing the cooling pipe to the flange,
After the supply pipe fixing step and the cooling pipe fixing step, a flange fixing step of detachably fixing the flange to the furnace wall, and a flange fixing step.
Have,
A method for attaching a burner that controls the positions of the oxidizing agent supply pipe and the cooling pipe protruding into the furnace by the flange fixing step. It has a transporting step of transporting the flange to which the oxidizing agent supply pipe and the cooling pipe are fixed.
The supply pipe fixing step and the cooling pipe fixing step are performed at the factory.
The method for attaching a burner according to claim 4, wherein the flange fixing step is performed at a site where the oxidant supply pipe and the cooling pipe are installed in a combustion furnace having the furnace wall after the transportation step.

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