JP5901182B2 - Fuel mixing tank and gas turbine power generation system including the same - Google Patents

Description

  The present invention relates to a fuel mixing tank capable of improving the mixing ratio of fuel guided to the inside and a gas turbine power generation system including the fuel mixing tank.

  Currently, a gas turbine power generation system using a blast furnace gas, which is a by-product gas discharged from a blast furnace in a steelworks and contains a large amount of CO, as a main fuel has been developed. In such a gas turbine power generation system, as shown in FIG. 6, the gas calorie of the generated blast furnace gas varies greatly depending on the operating state of the blast furnace. FIG. 6 shows an example of the calorie fluctuation of the blast furnace gas in which the vertical axis indicates the gas calorie of the blast furnace gas and the horizontal axis indicates the time. As shown in FIG. 6, when the gas calorie of the blast furnace gas varies, the power generation output of the gas turbine using the blast furnace gas as the main fuel varies. In particular, when the variation in gas calories of the blast furnace gas increases, unstable combustion and misfire may occur.

  Therefore, in order to stabilize the operation of the gas turbine power generation system, it is necessary to keep the gas calorie fluctuation of the blast furnace gas constant. For this reason, currently, a mixing tank that once mixes blast furnace gas that fluctuates in calories and derives it as fuel gas is provided (for example, Patent Document 1).

JP 2006-233920 A Japanese Patent No. 3807596

  However, in order to maintain the mixing ability equivalent to the invention described in Patent Document 1 when the flow rate of the fuel gas supplied to the gas turbine increases, it is necessary to increase the tank capacity of the mixing tank. However, when the capacity of the mixing tank is increased, there are problems that the mixing tank installation area is increased and the cost is increased.

  Further, Patent Document 2 discloses a fuel oil introduced into the fuel oil storage tank by erecting a T-shaped stand having a horizontal plate at the tip from the bottom of the fuel oil storage tank. However, in recent years, further improvement of the mixing rate is desired.

  The present invention has been made in view of such circumstances, and a fuel mixing tank capable of improving the fuel mixing ratio without changing the capacity even when the fuel flow rate is increased and the fuel mixing tank. An object is to provide a gas turbine power generation system provided.

In order to solve the above problems, the fuel mixing tank of the present invention and the gas turbine power generation system including the same employ the following means.
That is, according to the fuel mixing tank of the present invention, the side wall, the bottom surface, the upper surface, the partition plate extending upward in the interior thereof, and the bottom surface or the side wall near the bottom surface are provided on the side wall. A fuel introduction port for introducing a blast furnace gas , which is a fuel , into the inside; and a bottom surface on the opposite side of the fuel introduction port across the partition plate or the side wall in the vicinity of the bottom surface. In the fuel mixing tank having a fuel outlet for deriving the blast furnace gas , the partition plate is provided with a gap between the top surface and the gap between the bottom surface and / or the side wall. Arranged so as to be provided, or provided with a gap between the upper surface and connected to the bottom surface and / or the side wall, in the vicinity of a connection portion with the bottom surface and / or the side wall of Characterized in that at least one hole or slit is provided in the serial partition plate.

A partition plate extending upward is provided inside a fuel mixing tank having a fuel introduction port that is provided on the bottom surface or a side wall near the bottom surface and introduces blast furnace gas as fuel upward. A gap is provided between the upper surface of the fuel mixing tank and a gap is provided between the bottom surface and / or the side wall, or a gap is provided between the upper surface and the bottom surface and / or Alternatively, it is arranged to be connected to the side wall, and at least one hole or slit is provided in the partition plate in the vicinity of the bottom surface and / or the connection portion with the side wall. Thereby, the entrained flow of the blast furnace gas from the gaps, holes, and slits can be taken into the fuel guided from the fuel introduction port to the inside of the fuel mixing tank, thereby improving the fuel mixing rate. Therefore, even when the fuel flow rate is increased, the fuel mixing capacity substantially the same as that of the conventional fuel mixing tank can be maintained without increasing the capacity of the fuel mixing tank. Therefore, an increase in the installation space of the fuel mixing tank and an increase in cost can be suppressed.

  Furthermore, the fuel mixing tank according to the present invention is characterized in that a plate material substantially orthogonal to the extending direction of the partition plate is provided in the upper end of the partition plate or in the vicinity of the upper end.

  A plate material substantially orthogonal to the extending direction of the partition plate is provided at the upper end of the partition plate or in the vicinity of the upper end. As a result, the fuel guided from the fuel inlet into the fuel mixing tank collides with the partition plate, and further collides with the plate material. Accordingly, the fuel mixing ratio can be further improved.

  Furthermore, according to the fuel mixing tank according to the present invention, the bottom surface has a space portion that is partially depressed downward, and the space portion includes at least one porous plate having porosity. Provided substantially parallel to the bottom surface, the fuel introduction port is provided below the perforated plate.

  A space portion that is recessed downward is provided in a part of the bottom surface of the fuel mixing tank, and at least one porous plate having a porosity substantially parallel to the bottom surface is provided in the space portion, and fuel is introduced below the porous plate. It was decided to provide a mouth. As a result, the fuel guided from the fuel introduction port to the space can be dispersed through each hole of the perforated plate and allowed to flow out into the fuel mixing tank. Therefore, the fuel mixing ratio can be improved.

  Furthermore, according to the fuel mixing tank according to the present invention, the porous plate is provided in a plurality of stages, and the phases of the porous plates of the porous plates differ from stage to stage.

  A plurality of perforated plates were installed, and the phase of the perforations of each perforated plate was changed for each step. Thus, the fuel guided from the fuel introduction port to the space portion passes through the plurality of stages of pores, and is further dispersed and flows out to the fuel mixing tank. Accordingly, the fuel mixing ratio can be further improved.

  Furthermore, according to the fuel mixing tank according to the present invention, the porous plate is provided in a plurality of stages, and the porosity of each porous plate has a different opening ratio for each stage.

  A plurality of perforated plates were installed, and the aperture ratio of each perforated plate was changed for each step. As a result, the fuel guided from the fuel introduction port to the space portion passes through a plurality of stages of pores having different opening ratios, so that the fuel is further stirred and flows out into the fuel mixing tank. Accordingly, the fuel mixing ratio can be further improved.

  Furthermore, according to the fuel mixing tank of the present invention, the fuel introduction port is provided with a diameter-expanding pipe that increases in diameter toward the opening.

  A diameter-expanding pipe that expands the diameter of the fuel inlet toward the opening is provided. Thereby, the pressure loss of fuel can be reduced.

  Furthermore, the fuel mixing tank according to the present invention is characterized in that the fuel outlet is provided in a plurality of branches.

  The fuel outlet is divided into a plurality of branches. As a result, even if the fuel mixing in the fuel mixing tank is not uniform, the fuel is mixed and averaged in the fuel outlets branched into a plurality of branches. Therefore, the fuel mixing ratio can be improved and derived from the fuel mixing tank.

  Furthermore, according to the gas turbine power generation system of the present invention, any one of the fuel mixing tanks described above is provided.

A fuel mixing tank capable of improving the fuel mixing rate was used. As a result, even if the flow rate of the fuel led to the fuel mixing tank increases or changes greatly, the fuel derived from the fuel mixing tank does not increase the installation space of the fuel mixing tank or increase the cost. The fuel can be guided to the gas turbine with a constant calorie fluctuation. Therefore, unstable combustion and misfire of the gas turbine due to fuel calorie fluctuation can be suppressed. Therefore, a stable gas turbine power generation system can be operated.
Moreover, since the increase in the installation space of a fuel mixing tank and the increase in cost are suppressed, the increase in the installation area and installation cost of a gas turbine power generation system can be suppressed.

  A partition plate extending upward is provided inside the fuel mixing tank provided on the bottom surface or in the side wall near the bottom surface and having a fuel introduction port for introducing the fuel upward, and the partition plate and the fuel mixing tank The gap is provided between the top surface and the bottom surface and / or the side wall, or the gap is provided between the top surface and the bottom surface and / or the side wall. And at least one hole or slit is provided in the partition plate in the vicinity of the connection portion with the bottom surface and / or the side wall. Thereby, the entrained flow of fuel from the gaps, holes, and slits can be taken into the fuel guided from the fuel introduction port to the inside of the fuel mixing tank, thereby improving the fuel mixing rate. Therefore, even when the fuel flow rate is increased, the fuel mixing capacity substantially the same as that of the conventional fuel mixing tank can be maintained without increasing the capacity of the fuel mixing tank. Therefore, an increase in the installation space of the fuel mixing tank and an increase in cost can be suppressed.

(A) is a schematic block diagram of the mixing tank of the gas turbine power generation system which concerns on 1st Embodiment of this invention, (B) to (H) is a schematic block diagram of the partition plate which provided the board | plate material. It is a modification of the mixing tank which concerns on 1st Embodiment of this invention. It is a schematic block diagram of the mixing tank of the gas turbine power generation system which concerns on 2nd Embodiment of this invention. It is a schematic block diagram of the mixing tank of the gas turbine power generation system which concerns on 3rd Embodiment of this invention. It is a schematic block diagram of the mixing tank of the gas turbine power generation system which concerns on 4th Embodiment of this invention. It is a graph which shows the calorie fluctuation | variation of the conventional blast furnace gas.

[First Embodiment]
FIG. 1 shows a schematic configuration diagram of a mixing tank of a gas turbine power generation system according to a first embodiment of the present invention.
A gas turbine power generation system (not shown) having a mixing tank (fuel mixing tank) 1 shown in FIG. 1 is a gas turbine (shown in FIG. 1) that rotates and uses blast furnace gas discharged from a blast furnace (not shown) as fuel. And a generator (not shown) that converts the rotational energy of the gas turbine into electrical energy.

  The mixing tank 1 provided in such a gas turbine power generation system suppresses the fluctuation rate of the gas calorie of the blast furnace gas derived from the mixing tank 1 by improving the mixing ratio of the blast furnace gas (fuel). As shown in FIG. 1, for example, it has a substantially cylindrical shape with a diameter of about 34 m and a height of about 34 m. The substantially cylindrical mixing tank 1 includes a partition plate 2 that includes a side wall 1a, a bottom surface 1b, and an upper surface 1c, and extends upward in the interior thereof.

The partition plate 2 provided in the mixing tank 1 is perpendicular to the bottom surface 1b (approximately the axial line of the mixing tank 1) at a substantially central portion in the axial direction of the mixing tank 1 having a substantially cylindrical shape and a substantially central position of the bottom surface 1b. And approximately half the height of the mixing tank 1 in the axial direction (that is, the height of the side wall 1a).
As described above, the partition plate 2 having about half the axial height of the mixing tank 1 is provided in the mixing tank 1, thereby providing a gap between the bottom surface 1 b and the top surface 1 c and the lower end and the upper end of the partition plate 2. Is formed. In order to further improve the mixing ratio of the fuel, it is preferable that the partition plate 2 be higher than half the height of the mixing tank 1 in the axial direction.

  In addition, an inlet pipe (fuel inlet) 3 for introducing blast furnace gas into the mixing tank 1 is provided on the bottom surface 1b of the mixing tank 1, and the side opposite to the inlet pipe 3 with the partition plate 2 in between ( On the side wall 1a in the vicinity of the bottom surface 1b (on the right side in FIG. 1), an outlet pipe (fuel outlet) 4 for leading blast furnace gas from the inside of the mixing tank 1 is provided.

Next, the flow of the blast furnace gas when the blast furnace gas is introduced into the mixing tank 1 having such a structure will be described.
As indicated by a solid arrow A in FIG. 1, blast furnace gas is guided into the mixing tank 1 upward from an inlet pipe 3 provided on the bottom surface 1 b of the mixing tank 1. Since the partition plate 2 is provided inside the mixing tank 1, the blast furnace gas introduced into the mixing tank 1 is not directly led out of the mixing tank 1 from the outlet pipe 4.

  The blast furnace gas introduced into the mixing tank 1 flows from the bottom surface 1b side to the top surface 1c side of the mixing tank 1 as indicated by a solid arrow A in FIG. At this time, since a gap is provided between the bottom surface 1b of the mixing tank 1 and the lower end of the partition plate 2, the inside of the mixing tank 1 on the side opposite to the inlet pipe 3 (outlet pipe 4 side) with the partition plate 2 interposed therebetween. The entrained flow of blast furnace gas (indicated by the dotted arrow B in FIG. 1) flows from the (right side in FIG. 1) into the inside of the mixing tank 1 on the inlet pipe 3 side (left side in FIG. 1) across the partition plate 2. Flows in.

  That is, due to the flow of blast furnace gas introduced from the inlet pipe 3 into the mixing tank 1 (solid arrow A in FIG. 1), the surrounding blast furnace gas is pulled in the same direction as the solid arrow A in FIG. Overall, the flow is from the bottom surface 1b side of the mixing tank 1 toward the top surface 1c side. In this way, the surrounding blast furnace gas moves from the bottom surface 1b side of the mixing tank 1 to the upper surface 1c side, so that the partition is separated from the gap formed between the lower end of the partition plate 2 and the bottom surface 1b of the mixing tank 1. The blast furnace gas inside the mixing tank 1 on the outlet pipe 4 side across the plate 2 flows into the mixing tank 1 on the inlet pipe 3 side across the partition plate 2 (dotted arrow in FIG. 1). B).

  In this way, the entrained flow flows into the mixing tank 1 on the inlet pipe 3 side from the outlet pipe 4 side with the partition plate 2 interposed therebetween, whereby the entrained flow and the blast furnace gas guided from the inlet pipe 3 are mixed. The mixed blast furnace gas is separated from the gap formed between the upper surface 1c of the mixing tank 1 and the upper end of the partition plate 2 as shown by the solid line arrow C in FIG. It flows into the mixing tank 1 on the 3 side. The blast furnace gas flowing into the mixing tank 1 on the side opposite to the inlet pipe 3 across the partition plate 2 is led out of the mixing tank 1 from the outlet pipe 4 provided on the side wall 1a.

As described above, the mixing tank 1 according to the present embodiment and the gas turbine power generation system including the mixing tank 1 have the following operational effects.
A partition plate 2 extending upward is provided in a mixing tank (fuel mixing tank) 1 having an inlet pipe (fuel introduction port) 3 on the bottom surface 1b, and the partition plate 2 and the mixing plate 2 are mixed. A gap is provided between the bottom 1b of the tank 1 (the bottom 1b and / or the side wall 1a). Thereby, the entrained flow of the blast furnace gas (fuel) guided from the gap between the bottom surface 1b and the lower end of the partition plate 2 is taken into the flow of the blast furnace gas guided from the inlet pipe 3 to the inside of the mixing tank 1, and the blast furnace Gas mixing ratio can be improved. Therefore, even when the flow rate of the blast furnace gas increases or changes significantly, the mixing capacity of the blast furnace gas is maintained substantially the same as that of a conventional mixing tank (not shown) without increasing the capacity of the mixing tank 1. can do. Therefore, an increase in installation space and cost of the mixing tank 1 can be suppressed.

  The mixing tank 1 capable of improving the mixing ratio of the blast furnace gas was used. Thereby, even if the flow rate of the blast furnace gas guided to the mixing tank 1 increases or changes greatly, it is derived from the mixing tank 1 without increasing the installation space of the mixing tank 1 or increasing the cost. Thus, the fluctuation of the calorie of the blast furnace gas can be made constant and led to a gas turbine (not shown). Therefore, unstable combustion and misfire of the gas turbine due to calorie fluctuation of the blast furnace gas can be suppressed. Therefore, a stable gas turbine power generation system (not shown) can be operated.

  Moreover, since the increase in the installation space of the mixing tank 1 and the increase in cost can be suppressed, the increase in the installation area and installation cost of a gas turbine power generation system can be suppressed.

Note that the present embodiment can be modified as follows.
[Modification]
As shown in FIG. 2, the inlet pipe 13 may be provided on the side wall 1 a near the bottom surface 1 b of the mixing tank 1. Moreover, it is good also as what provides the exit piping 14 in the bottom face 1b.
When the inlet pipe (fuel introduction port) 13 is provided on the side wall 1a in the vicinity of the bottom surface 1b of the mixing tank (fuel mixing tank) 1, the inlet pipe 13 is passed through the mixing tank 1 and the tip thereof is mixed into the mixing tank 1. It bends in the substantially L shape toward the upper surface 1c. In this way, by bending the inlet pipe 13 into a substantially L-shape, the blast furnace gas (fuel) guided from the inlet pipe 13 is moved from the vicinity of the bottom face 1b of the mixing tank 1 to the upper face as shown by the solid line arrow A in FIG. Derived toward 1c and mixed with an entrained flow (indicated by the dotted arrow B in FIG. 2).

In the present embodiment and the modification, the partition plate 2 is provided at the approximate center in the axial direction of the mixing tank 1 and the approximate center of the bottom surface 1b, and the height of the partition plate 2 is about the height of the mixing tank 1 in the axial direction. Although described as about half, the present invention is not limited to this, and the partition plate 2 is provided in the mixing tank 1 so as to partition between the inlet pipes 3 and 13 and the outlet pipe 4, and the partition A gap is secured between the upper end of the plate 2 and the upper surface 1c of the mixing tank 1 so that the blast furnace gas flows over the upper end of the partition plate 2 as shown by the arrow C in FIGS. It is only necessary to provide a gap through which the entrained flow of blast furnace gas can pass in at least one of the space between the bottom surface 1b and the side wall 1a.
Alternatively, instead of providing a gap between the bottom surface 1b and the side wall 1a, at least one hole or slit through which the entrained flow of blast furnace gas can pass is provided in the partition plate 2 in the vicinity of the connecting portion with the bottom surface 1b or the side wall 1a. Also good.

  Furthermore, although the partition plate 2 is provided perpendicular to the bottom surface 1b of the mixing tank 1, it may be provided so as to be inclined, and the partition plate 2 has a large number of parts in its entirety or in part. A perforated plate or a mesh plate in which holes are formed may be used, or a flat plate or a curved plate may be used.

Further, as shown in FIGS. 1B to 1D, a horizontal plate (plate material) 2 a substantially orthogonal to the extending direction of the partition plate 2 is provided near the upper end or near the upper end of the partition plate 2. Also good. As a result, the blast furnace gas introduced into the mixing tank 1 from the inlet pipes 3 and 13 collides with the partition plate 2 and further collides with the horizontal plate 2a. Therefore, the mixing rate of blast furnace gas can be further improved.
The horizontal plate 2a may be provided at the upper end of the partition plate 2 so as to be L-shaped or T-shaped together with the partition plate 2, as shown in FIG. 1 (B) or (C). However, as shown in FIG. 1D, the horizontal plate 2a and the partition plate 2 may be provided in the form of a cross in the vicinity of the upper end slightly below the upper end of the partition plate 2. Further, instead of the horizontal plate 2a, an inclined plate (plate material) 2b may be used as shown in FIGS.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described. The mixing tank of the gas turbine power generation system of the present embodiment is the first in that a chamber is provided on the bottom surface on the side where the inlet pipe is provided across the partition plate, and the bottom surface of the mixing tank is formed of a porous plate. Unlike the first embodiment, the rest is the same. Accordingly, the same configuration and flow are denoted by the same reference numerals and description thereof is omitted.

FIG. 3 shows a schematic configuration diagram of a mixing tank of a gas turbine power generation system according to the second embodiment of the present invention.
The mixing tank (fuel mixing tank) 21 is provided with a partition plate 22 at substantially the center thereof, and a part of the bottom surface 21b of the mixing tank 21 (the left side of the partition plate 22 in FIG. 3) is directed downward. It has a hollow chamber (space part) 25.

  The chamber 25 is provided with two stages (a plurality of stages) of perforated plates 26 having a porosity substantially parallel to the bottom surface 21 b, and an inlet pipe (fuel inlet) 23 is provided on the lower surface of the chamber 25. Is provided. The porous plates 26a and 26b provided in two stages are different from each other in the phase of the porosity provided in the porous plate 26a and the porosity provided in the porous plate 26b.

  Blast furnace gas (fuel) is guided from the inlet pipe 23 to the chamber 25 in the mixing tank 21 having such a structure. The blast furnace gas guided to the chamber 25 is guided into the mixing tank 21 through the holes provided in the perforated plates 26a and 26b. When passing through the perforated plates 26a, 26b, the phases of the holes of the perforated plates 26a, 26b are different, so that the flow distribution of the blast furnace gas is made uniform and the blast furnace gas is guided from the chamber 25 into the mixing tank 21. (Indicated by a solid arrow A in FIG. 3).

  The blast furnace gas having a uniform flow distribution in this way is an entrained flow of blast furnace gas guided by a gap between the lower end of the partition plate 22 and the bottom surface 21b of the mixing tank 21 (indicated by a dotted arrow B in FIG. 3). .) Is guided from the gap between the upper end of the partition plate 22 and the upper surface 21c of the mixing tank 1 to the mixing tank 21 on the opposite side (right side in FIG. 3) across the partition plate 22 (see FIG. 3). 3, indicated by a solid line arrow C), and is led out of the mixing tank 21 from the outlet pipe (fuel outlet port) 24.

As described above, the mixing tank 21 according to the present embodiment and the gas turbine power generation system including the mixing tank 21 have the following operational effects.
A chamber (space part) 25 that is recessed downward is provided in a part of the bottom surface 21 b of the mixing tank (fuel mixing tank) 21, and a porous plate 26 having a hole is substantially parallel to the bottom surface 21 b in the chamber 25. It was decided to provide it. As a result, the blast furnace gas (fuel) guided from the inlet pipe (fuel inlet) 23 to the chamber 25 can be dispersed through the holes of the perforated plate 26 and allowed to flow out into the mixing tank 21. Therefore, the mixing rate of the blast furnace gas in the mixing tank 21 can be improved.

  Two stages (multiple stages) of the perforated plate 26 are installed, and the phase of the perforations provided in each of the perforated plates 26a and 26b is changed for each stage. As a result, the blast furnace gas guided from the inlet pipe 23 to the chamber 25 passes through the perforations of the perforated plates 26 a and 26 b and is further dispersed and flows out into the mixing tank 21. Therefore, the mixing ratio of the blast furnace gas in the mixing tank 21 can be further improved.

  In the present embodiment, the phase of the holes provided in the porous plates 26a and 26b has been described as being changed step by step (for each of the porous plates 26a and 26b), but the holes provided in the porous plates 26a and 26b. It is good also as what changes the aperture ratio of every step. As a result, the blast furnace gas guided from the inlet pipe 23 to the chamber 25 passes through the perforations of the perforated plates 26 a and 26 b having different opening ratios, and is further stirred and flows out into the mixing tank 21. Therefore, the mixing ratio of the blast furnace gas in the mixing tank 21 can be further improved.

  When the aperture ratio of the holes provided in the porous plates 26a and 26b is changed for each stage, it is preferable that the aperture ratio of the porous plate 26b is larger than the aperture ratio of the porous plate 26a. As a result, the blast furnace gas flowing into the chamber 25 by passing through the porous plate 26a can be sufficiently resisted and led out from the porous plate 26b into the mixing tank 21. The aperture ratio of the porous plate 26a and the porous plate 26b may be the same, or conversely, the aperture ratio of the porous plate 26a may be larger than the aperture ratio of the porous plate 26b. Further, the perforated plate 26 may have a plurality of stages or only one stage.

[Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described. The mixing tank of the gas turbine power generation system of the present embodiment is different from the first embodiment in that an inlet pipe provided on the bottom surface or a side wall near the bottom surface is provided with an enlarged diameter toward the outlet opening. Others are the same. Accordingly, the same configuration and flow are denoted by the same reference numerals and description thereof is omitted.

FIG. 4 shows a schematic configuration diagram of a mixing tank of a gas turbine power generation system according to the third embodiment of the present invention.
The inlet pipe (fuel inlet) 33 provided on the bottom surface 31b of the mixing tank (fuel mixing tank) 31 is directed to the outlet opening (in FIG. 4, in other words, the bottom surface 31b of the mixing tank 31). An expanded pipe (expanded pipe) 33a having a larger diameter is used.

As described above, the mixing tank 31 according to the present embodiment and the gas turbine power generation system including the mixing tank 31 have the following operational effects.
An expanded pipe (expanded pipe) 33 a that expands toward the outlet opening of the inlet pipe (fuel inlet) 33 is provided. Thereby, the pressure loss of blast furnace gas (fuel) can be reduced.

[Fourth embodiment]
The fourth embodiment of the present invention will be described below. The mixing tank of the gas turbine power generation system of the present embodiment is different from the first embodiment in that the outlet pipe is branched into three, and the others are the same. Accordingly, the same configuration and flow are denoted by the same reference numerals and description thereof is omitted.

FIG. 5 shows a schematic configuration diagram of a mixing tank of a gas turbine power generation system according to a fourth embodiment of the present invention, in which (A) is a perspective view and (B) is a top view thereof.
As shown in FIG. 5 (A), the side wall 41a of the mixing tank (fuel mixing tank) 41 opposite to the inlet pipe (fuel introduction port) 43 (right side in FIG. 5) across the partition plate 42 has a bottom surface as shown in FIG. An outlet pipe (fuel outlet port) 44 is branched into three (plural) branches in the vicinity of 41b.
The three outlet pipes 44a, 44b, 44c provided in this way merge with each other on the downstream side thereof.

As described above, the mixing tank 41 according to the present embodiment and the gas turbine power generation system including the mixing tank 41 have the following operational effects.
The outlet pipes (fuel outlets) 44a, 44b, and 44c are branched into three (plural). Thereby, even if mixing of the blast furnace gas (fuel) in the mixing tank (fuel mixing tank) 41 is not uniform, the blast furnace gas is mixed and averaged when the outlet pipes 44a, 44b, and 44c merge. . Therefore, the blast furnace gas can be derived by improving the mixing ratio.

  In the present embodiment, the position of each outlet pipe 44 is described as the side wall 41a in the vicinity of the bottom face 41b of the mixing tank 41. However, the present invention is not limited to this, and the anti-inlet pipe is sandwiched between the partition plates 42. As long as it is provided on the side of 43, any height position in the axial direction of the mixing tank 41 and any position in the circumferential direction of the side wall 41a of the mixing tank 41 may be used. Furthermore, the number of branch outlet pipes 44 may be two or four or more, but the blast furnace gas can be averaged as the number increases.

1, 21, 31, 41 Fuel mixing tank (mixing tank)
1a Side wall 1b, 21b, 31b, 41b Bottom surface 1c, 21c Upper surface 2, 22, 42 Partition plate 3, 23, 33, 43 Fuel inlet (inlet piping)
33a Expanding tube (expanded tube)
4, 24, 44 Fuel outlet (outlet piping)

Claims (8)

Side walls,
The bottom,
The top surface;
A partition plate extending upward in the interior;
A fuel introduction port provided on the side wall in the vicinity of the bottom surface or the bottom surface for introducing a blast furnace gas , which is a fuel , into the inside upward;
A fuel outlet that is provided on the side wall in the vicinity of the bottom surface on the opposite side of the fuel inlet and sandwiches the partition plate, and that guides the blast furnace gas from the inside;
In a fuel mixing tank equipped with
The partition plate is
A gap is provided between the upper surface and a gap is provided between the bottom surface and / or the side wall, or
A gap is provided between the upper surface and the bottom surface and / or the side wall, and at least one hole or slit is provided in the vicinity of the connecting portion between the bottom surface and / or the side wall. A fuel mixing tank.   2. The fuel mixing tank according to claim 1, wherein a plate material substantially perpendicular to the extending direction of the partition plate is provided at an upper end of the partition plate or in the vicinity of the upper end. The bottom surface has a space part of which part is recessed downward.
In the space portion, at least one perforated plate having perforations is provided substantially parallel to the bottom surface,
The fuel mixing tank according to claim 1, wherein the fuel introduction port is provided below the perforated plate. The perforated plate is provided in a plurality of stages,
The fuel mixing tank according to claim 3, wherein the perforations of each of the perforated plates have different phases for each stage. The perforated plate is provided in a plurality of stages,
The fuel mixing tank according to claim 3 or 4, wherein the perforations of each of the perforated plates have different opening ratios for each stage.   The fuel mixing tank according to any one of claims 1 to 5, wherein the fuel introduction port is provided with a diameter-expanding pipe that expands toward the opening.   The fuel mixing tank according to any one of claims 1 to 6, wherein the fuel outlet port is provided in a plurality of branches. A gas turbine power generation system comprising the fuel mixing tank according to any one of claims 1 to 7.

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