JP2015151434A - Tar reforming furnace and gasification equipment thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tar reforming furnace having a high reforming ratio, with a gasification gas sufficiently agitated by formation of whirlpools which are smaller than those of the gasification gas introduced from the tangential direction of the furnace body.SOLUTION: A tar reforming furnace 11 injects a gasification gas and an oxidizer into a furnace body 19 so as to reform the tar of the gasification gas. At the top of the furnace body, a plurality of injection flow channels 23 and 24 along the annular circumferential direction are disposed on the inner peripheral side and the outer peripheral side. The injection flow channel 23 on the inner peripheral side is inclined obliquely downward toward the outside in the radial direction of the annular form, and the injection flow channel 24 on the outer peripheral side is inclined obliquely downward toward the inside in the radial direction of the annular form. At least one of the gasification gas and the oxidizer is introduced in the injection flow channel 23 on the inner peripheral side and the injection flow channel 24 on the outer peripheral side. Consequently, alternate injection directions are formed in the furnace body 19 in the plane view, so that revolving whirlpools proceed downwards.

Description

  The present invention relates to a tar reforming furnace for reforming tar and its gasification equipment.

  In general, gasification equipment such as a two-column gasification furnace is provided with a reforming line through which gasification gas generated from a fluidized bed gasification furnace flows, and the reforming line is modified with tar gasification gas. A quality oxidation reforming furnace is installed.

  The oxidation reforming furnace includes a cylindrical furnace body that reforms the gasified gas tar, a gasification gas introduction section that introduces the gasification gas from a tangential direction of the peripheral surface of the furnace body in plan view, and a furnace body And an oxidant introduction part for introducing the oxidant downward in the vertical direction from the ceiling (see, for example, Patent Document 1).

  When reforming the tar of the gasification gas, the gasification gas is introduced from the tangential direction of the furnace main body to form a large vortex in the furnace main body, and an oxidant is blown downward and mixed therein. Subsequently, part of the gasified hydrocarbon and hydrogen gas is burned with an oxidizing agent to bring the inside of the furnace body to a high temperature state of about 1000 ° C. or higher, and tar is reformed by water vapor contained in the gasified gas.

JP 2009-298974 A

  However, the oxidation reforming furnace introduces gasified gas from the tangential direction of the furnace main body in a plan view to form a large vortex in the furnace main body, and oxidant is blown downward vertically from the ceiling of the furnace main body, Stirring in the furnace body depends on a large vortex of the gasification gas, and there is a problem that the gasification gas and the oxidant cannot be sufficiently stirred. In addition, in the structure of the oxidation reforming furnace, the temperature becomes non-uniform due to insufficient stirring, and mixing and reaction become active near the oxidant jet, and the combustion reaction proceeds greatly locally, exceeding 1000 ° C. While it became a high temperature state, the combustion reaction did not proceed in the low temperature part, and as a result, there was a problem that a high reforming rate could not be achieved.

  The present invention has been made in view of the above-described conventional problems, and compared with the vortex in the case where the gasification gas is introduced from the tangential direction of the furnace body, the gasification gas is sufficiently stirred to form a small vortex and is high. A tar reforming furnace and its gasification equipment capable of achieving a reforming rate are provided.

The tar reforming furnace of the present invention is a tar reforming furnace for reforming gasified gas tar by injecting gasified gas and oxidant into the furnace body,
A plurality of injection flow paths formed along the annular circumferential direction at the upper part of the furnace body are arranged on the inner peripheral side and the outer peripheral side, and the inner peripheral injection flow paths are inclined toward the annular radial outer side. While inclining downward, the outer peripheral injection flow path is inclined obliquely downward toward the annular radial inner side,
At least one of a gasified gas or an oxidant is introduced into the inner peripheral injection flow path and the outer peripheral injection flow path, causing alternate injection directions in the furnace body in a plan view, and turning It is configured to form a downward vortex.

  In the tar reforming furnace of the present invention, the inner peripheral injection passage and the outer peripheral injection passage are arranged concentrically, gasified gas is introduced into the inner peripheral injection passage, and the outer periphery It is preferable that the oxidant be introduced into the side injection flow path.

  Further, in the tar reforming furnace of the present invention, the inner peripheral injection passage and the outer peripheral injection passage are arranged concentrically, and the inner peripheral injection passage and the outer peripheral injection passage are arranged. It is configured to introduce gasified gas, and further, an intermediate injection flow path directed downward is disposed between the inner peripheral injection flow path and the outer peripheral injection flow path. It is preferable that the oxidant be introduced.

  Further, the tar reforming furnace of the present invention preferably includes an opening / closing means for opening and closing the injection flow path and a control unit for controlling the opening / closing means.

  In the tar reforming furnace of the present invention, it is preferable that the inner peripheral side injection passage and the outer peripheral side injection passage are inclined at 30 ° or more and 60 ° or less with respect to the vertical direction.

  A gasification facility according to the present invention is a gasification facility including the above-described tar reforming furnace, which includes a fluidized bed gasification furnace that extracts a gasification gas from a raw material and supplies the gasification gas to the tar reforming furnace, and the fluidized bed gasification A fluidized bed combustion furnace for supplying char and a fluidized medium generated in the furnace and heating the fluidized medium by combustion of the char, and the fluidized bed gasification furnace by separating the fluidized medium from the exhaust gas derived from the fluidized bed combustion furnace And a separator to be supplied to.

  According to the present invention, compared with the case where gasified gas is introduced from the tangential direction of the furnace body to form a vortex, a small vortex is formed and the gasified gas is sufficiently stirred to achieve a high reforming rate. It is possible to achieve an excellent effect of being able to.

It is a conceptual diagram which shows the tar reforming furnace of this invention, and its gasification equipment. The 1st example of the tar reforming furnace of this invention is shown, (A) is a side view which shows the upper part of a furnace main body, (B) is the top view which looked at (A) from the IIB-IIB direction. It is a side view of the other structure which shows the case where the upper part of the furnace main body of a 1st example is deform | transformed. It is a side view of another structure which shows the case where the gasification gas of 1st example and the introduction structure of an oxidizing agent are deform | transformed. It is a top view which shows the small vortex in a furnace main body. The 2nd example of the tar reforming furnace of this invention is shown, (A) is a side view which shows the upper part of a furnace main body, (B) is the top view which looked at (A) from the VIB-VIB direction. It is a side view of the other structure which shows the case where the upper part of the furnace main body of a 2nd example is deform | transformed. It is a side view of another structure which shows the case where the gasification gas and oxidizing agent introduction structure of a 2nd example is deform | transformed.

  Hereinafter, an embodiment in which gasification equipment for a tar reforming furnace of the present invention is implemented will be described with reference to FIG.

  The gasification facility 1 includes a fluidized bed gasification furnace 2 that generates a gasified gas by forming a fluidized bed, and supplies the char and the fluidized medium generated in the fluidized bed gasification furnace 2 to generate the fluidized medium by burning the char. A fluidized bed combustion furnace 3 for heating and a separator 4 for separating the fluidized medium from the exhaust gas derived from the fluidized bed combustion furnace 3 and supplying it to the fluidized bed gasification furnace 2 are provided. Here, the gasification facility 1 is not limited to a specific facility, but a two-column gasification furnace is preferable.

  The fluidized bed gasification furnace 2 is formed over a gasification section 5 for gasifying a raw material such as coal with the heat of a fluidized medium, and a lower portion of the gasification section 5. The gasification unit 5 is connected to a raw material supply line 7, and the box unit 6 is connected to a gasification agent supply line 8. The fluidized bed gasification furnace 2 supplies the char and the fluidized medium that have not been gasified to the fluidized bed combustion furnace 3 through the overflow pipe 9 and supplies the generated gasified gas to the reforming line 10. It has become. Here, a reforming line 10 for supplying gasified gas from the fluidized bed gasification furnace 2 includes a tar reforming furnace 11, a heat exchanger (hereinafter not shown), a cooler, an induction fan (IDF), desulfurization. Equipment, desalinator, etc., and finally lead to flare stack etc.

  The fluidized bed combustion furnace 3 introduces the char and fluidized medium of the fluidized bed gasification furnace 2 from the lower part and blows out air supplied from the air pipe 12 from the lower wind box 13. The char and the fluid medium are fluidized and raised by the blown air, and the char is combusted and the fluid medium is heated while it rises. The fluidized bed combustion furnace 3 supplies a high temperature fluid containing a fluidized medium to the separator 4 through a transfer pipe 14.

  The separator 4 is provided with an outer cylinder 15 having a cyclone structure, and a high-temperature fluid including a fluid medium of the fluidized bed combustion furnace 3 is introduced into the outer cylinder 15 in a tangential direction to produce a fluid medium and exhaust gas. It is designed to be centrifuged. Further, the separator 4 discharges exhaust gas containing ash having a small particle diameter from the discharge line 16, and fluidized bed gas containing unburned char having a coarse particle diameter is fluidized by a downcomer pipe 17 connected to the separator 4. It is supplied to the chemical reactor 2.

  Next, a first example of an embodiment for carrying out the tar reforming furnace of the present invention will be described with reference to FIGS.

  As shown in FIG. 2, the tar reforming furnace 11 of the first example is a gas composed of a columnar furnace body 19 having a discharge port 18 (see FIG. 1) below and a flange 20 on the top of the furnace body 19. The gasification gas injection part 21 and the oxidizing agent injection part 22 comprised by the flange 20 of the upper part of the furnace main body 19 are provided.

  The gasification gas injection section 21 and the oxidant injection section 22 are formed of a plurality of injection flow paths formed at regular intervals along the annular circumferential direction as seen in a plan view as shown in FIGS. 23 and 24 are provided on the inner peripheral side and the outer peripheral side so as to be concentric. The inner peripheral injection passage 23 is a part of the gasification gas injection section 21 so that gasified gas is introduced, and the outer peripheral injection passage 24 is introduced with oxidant. It is a part of the oxidant injection unit 22. Further, as shown in FIGS. 2A and 5, the inner peripheral injection flow path 23 is inclined obliquely downward toward the outer side in the annular radial direction, and the outer peripheral injection flow path 24 is annular. It is inclined obliquely downward toward the inside in the radial direction. Here, the inner peripheral injection passage 23 and the outer peripheral injection passage 24 are not directly formed only on the flange 20 as shown in FIG. Also good. Further, the inner peripheral side injection flow path 23 may be a part of the oxidant injection portion 22 so that the oxidant is introduced, and the outer peripheral side injection flow path 24 is introduced with gasified gas. Thus, it may be a part of the gasified gas injection unit 21. Furthermore, the annular position where the plurality of injection flow paths 23 and 24 are formed is not limited to the same distance in the radial direction from the annular center point, but indicates a region of an annular band having a width. Furthermore, there are no problems as long as the number of the inner peripheral side injection flow paths 23 and the outer peripheral side injection flow paths 24 is three or more, but it is preferable to determine in consideration of the scale of the furnace body 19.

  Further, the gasified gas injection section 21 extends from the fluidized bed gasification furnace 2 so as to cover all the flow path openings of the inner peripheral injection flow path 23 (see FIG. 1). ) Large-diameter pipe 25 is connected to the flange 20. Further, in the oxidant injection section 22, an annular oxidant introduction chamber 26 is disposed in the flange 20 so as to cover all the flow path ports of the outer peripheral side injection flow path 24. In addition, a pipe 28 of an oxidant supply line 27 for supplying an oxidant is connected to the oxidant introduction chamber 26. Here, as shown in FIG. 4, the oxidant injection unit 22 does not include the annular oxidant introduction chamber 26, and connects the pipes 28 of the oxidant supply lines 27 to the respective injection passages 24 on the outer peripheral side. May be. In addition, the piping 28 of the oxidant supply line 27 is provided with opening / closing means 29 such as individual valves that can open and close the injection flow path 24 on the outer peripheral side, and further includes a control unit 30 that controls the individual opening / closing means 29. May be. Furthermore, small-diameter pipes (not shown) of the reforming line 10 may be connected to the individual inner peripheral injection passages 23 so as to supply gasified gas, or inner peripheral injection. You may provide opening-closing means (not shown), such as a valve | bulb etc. which can open and close the flow path 23, and the other control part (not shown) which controls an opening / closing means.

  The inner peripheral injection flow path 23 and the outer peripheral injection flow path 24 cross each other in a side view as shown in FIG. 2A and alternate in a plan view as shown in FIG. Further, the inner peripheral side injection flow path 23 and the outer peripheral side injection flow path 24 are set to be 30 ° or more and 60 ° or less with respect to the vertical direction, preferably 45 ° with respect to the vertical direction. Further, a plurality of inner-side injection channels 23 and outer-side injection channels 24 are provided along the annular direction in plan view. In the first example, the entire upper portion of the furnace body 19 is provided along the annular direction. Is arranged.

  The effect | action of the 1st example of the form which implements the tar reforming furnace of this invention is demonstrated.

  When reforming the tar of the gasification gas in the tar reforming furnace 11 of the first example, the gasification gas generated from the fluidized bed gasification furnace 2 is passed through a plurality of internal pipes 25 via the piping 25 of the reforming line 10. It introduces into the circumferential injection passage 23, and injects radially into the furnace body 19 obliquely outward and downward in a side view and radially outward in a plan view. Subsequently, an oxidant such as air or high-concentration oxygen is supplied to the oxidant introduction chamber 26 via the pipe 28 of the oxidant supply line 27, and is supplied from the oxidant introduction chamber 26 to the plurality of outer peripheral injection channels 24. Introduced and injected into the furnace body 19 obliquely inward and downward in a side view and from the outside to an annular radial inner side in a plan view. In the furnace main body 19, the gasified gas and the oxidant cause alternate injection directions in a plan view by the inner peripheral injection passage 23 and the outer peripheral injection passage 24, and are small vortices that turn downward while turning. Form. In the whole furnace body 19, a plurality of uniform small vortices are formed along the annular direction in plan view by a plurality of combinations of the injection passage 23 on the inner peripheral side and the injection passage 24 on the outer peripheral side, and the gasification gas and Stir and mix the oxidizing agent. Here, the formation of the vortex structure is mainly due to the negative pressure on the opposite side of the gasification gas injection direction and the reverse side of the oxidant injection direction, and the gasification gas or oxidant injected adjacent thereto enter. It is the reason for formation. Further, in order to enhance the effect of stirring and mixing, it is better that the distance between the inner peripheral side injection flow path 23 and the outer peripheral side injection flow path 24 is small, and the inner peripheral side injection flow path 23 and the outer peripheral side injection flow path. The greater the number of paths 24, the better. Furthermore, the effect of stirring and mixing is better as the momentum of the gasification gas and the oxidant injected from the inner peripheral injection passage 23 and the outer peripheral injection passage 24 is higher.

  In the furnace main body 19, a part of the hydrocarbon and hydrogen gas of the gasification gas is burned with an oxidizing agent to bring the inside of the furnace main body 19 to a high temperature state of about 1000 ° C. or higher, and tar is generated by water vapor contained in the gasification gas. To reform.

  Thereafter, the reformed reformed gas is discharged to the downstream side of the reforming line 10 from the discharge port 18 (see FIG. 1), and a heat exchanger (hereinafter not shown), a cooler, an induction fan (IDF). ), Processed through a desulfurizer, a demineralizer, etc., and finally led to a flare stack or the like.

  As described above, according to the first example of the form of the tar reforming furnace, the gasification gas is formed by forming a small vortex as compared with the case where the gasification gas is introduced from the tangential direction of the furnace body 19 to form a large vortex. Can be sufficiently stirred to achieve a high reforming rate.

  Further, in the first example of the form of the tar reforming furnace, the inner peripheral side injection flow path 23 and the outer peripheral side injection flow path 24 are arranged concentrically, and gasification gas is introduced into the inner peripheral side injection flow path 23. In addition, when the oxidant is introduced into the injection flow path 24 on the outer peripheral side, a small vortex can be appropriately formed to suitably and sufficiently stir the gasification gas, thereby achieving a high reforming rate. .

  In the first example of the form of the tar reforming furnace, an opening / closing means 29 for opening / closing the inner peripheral injection passage 23 or the outer peripheral injection passage 24 and a control unit 30 for controlling the opening / closing means 29 are provided. Even if a temperature distribution deviation occurs in the furnace body 19, the gasification gas or oxidant injection amount and injection position can be adjusted to cope with this, so the gasification gas can be agitated appropriately. High reforming rate can be achieved.

  In the first example of the tar reforming furnace, when the inner peripheral injection passage 23 and the outer injection passage 24 are inclined at 30 ° or more and 60 ° or less with respect to the vertical direction, a small vortex Thus, the gasification gas can be suitably and sufficiently stirred to achieve a high reforming rate. Here, if the inner peripheral side injection flow path 23 and the outer peripheral side injection flow path 24 are inclined at an angle smaller than 30 ° with respect to the vertical direction, the downward force increases and the time until the discharge port 18 is increased. There is a problem that the gasification gas cannot be sufficiently stirred because of shortening. Also, if the inner peripheral injection flow path 23 and the outer peripheral injection flow path 24 are inclined at an angle larger than 60 ° with respect to the vertical direction, the downward force is weakened, and the gasified gas and the oxidizing agent are reduced. There is a problem in that it cannot be properly guided to the discharge port 18 and the temperature distribution is biased.

  Further, as shown in FIG. 1, a gasification facility 1 including the above tar reforming furnace 11, which includes a fluidized bed gasification furnace 2 that extracts a gasification gas from a raw material and supplies the gasification gas to the tar reforming furnace 11, The fluidized bed combustion furnace 3 for supplying the char and the fluidized medium generated in the bed gasification furnace 2 and heating the fluidized medium by combustion of the char; and the fluidized medium separated from the exhaust gas derived from the fluidized bed combustion furnace 3 When the separator 4 supplied to the bed gasification furnace 2 is provided, the gasification gas can be suitably taken out and the gasification gas can be appropriately processed.

  Next, a second example of an embodiment for carrying out the tar reforming furnace of the present invention will be described with reference to FIGS.

  The tar reforming furnace 31 of the second example is a modification of the configuration of the gasified gas injection unit 21 and the oxidant injection unit 22 of the first example, and as shown in FIG. 6, the discharge port 18 (see FIG. 1). A columnar furnace body 32 provided at the bottom, a gasified gas injection section 34 formed on the flange 33 on the top of the furnace body 32, and an oxidant injection section 35 configured on the flange 33 on the top of the furnace body 32, It has.

  As shown in FIG. 6B, the gasified gas injection unit 34 is concentric with a plurality of injection flow paths 36 and 37 that are formed at regular intervals along the annular circumferential direction when viewed in plan view. Are provided on the inner and outer peripheral sides. Further, as shown in FIG. 6A, the inner peripheral injection flow path 36 is inclined obliquely downward toward the annular radial outer side, and the outer peripheral injection flow path 37 has an annular diameter. It is inclined obliquely downward toward the inside of the direction.

  On the other hand, as shown in FIG. 6B, a plurality of the oxidant injection portions 35 are formed along the annular circumferential direction when viewed in plan, and the inner peripheral injection passage 36 and the outer peripheral injection passage. 37 is provided with an intermediate injection flow path 38 located between them. As shown in FIG. 6A, the intermediate injection flow path 38 is vertically downward between the inner peripheral injection flow path 36 and the outer peripheral injection flow path 37. Here, the inner peripheral injection flow path 36, the outer peripheral injection flow path 37, and the intermediate injection flow path 38 are not directly formed only in the flange 33, but in the lower part of the flange 33, as in the first example. A nozzle may be provided. Further, the annular position where the plurality of injection flow paths 36, 37, 38 are formed is not limited to the same distance in the radial direction from the annular center point, but indicates a region of an annular band having a width. In particular, as long as the intermediate injection flow path 38 is located between the injection flow path 36 on the inner peripheral side and the injection flow path 37 on the outer peripheral side, the intermediate injection flow path 38 may be at any position in the annular or annular band region. . Furthermore, in the second example, the gasification gas injection section 34 may include an intermediate injection flow path 38, and the oxidant injection section 35 may include an inner peripheral injection flow path 36 and an outer peripheral injection path 37. . Further, there are no problems if the inner peripheral side injection flow path 36 and the outer peripheral side injection flow path 37 are three or more respectively, but it is preferable to determine in consideration of the scale of the furnace body 32.

  Further, the gasified gas injection section 34 has a cylindrical gasified gas introduction chamber 39 with a flange 33 so as to cover all the flow path ports of the inner peripheral injection flow path 36 and the outer peripheral flow path 37. It is connected to the. Further, a pipe 40 of the reforming line 10 (see FIG. 1) for supplying the gasification gas is connected to the center of the gasification gas introduction chamber 39. Furthermore, the oxidant injection unit 35 arranges the individual pipes 41 of the oxidant supply line 27 so as to pass through the gasification gas introduction chamber 39 and connect to the individual intermediate injection flow paths 38, thereby supplying the oxidant supply. The piping 41 of the line 27 is provided with opening / closing means 42 such as a valve that enables the piping 41 to be opened and closed. Here, as shown in FIG. 7, the oxidant injection unit 35 includes a first pipe 43 that passes through the gasification gas introduction chamber 39 and is connected to each intermediate injection flow path 38, and a gasification gas introduction chamber 39. And an annular oxidant introduction chamber 44 that covers the entire flow path opening of the first pipe 43, and a second pipe 45 of the oxidant supply line 27 that supplies the oxidant to the oxidant introduction chamber 44. Also good. Further, as shown in FIG. 8, the oxidant injection unit 35 includes opening / closing means 42 such as individual valves for opening / closing the pipes 41 of the individual oxidant supply lines 27, and a control unit 46 for controlling the individual opening / closing means 42. May be provided.

  The inner peripheral side injection flow path 36 and the outer peripheral side injection flow path 37 cross each other in a side view as shown in FIG. 6 (A), and alternate in a plan view as shown in FIG. 6 (B). Yes. Moreover, the inner peripheral side injection flow path 36 and the outer peripheral side injection flow path 37 are set at 30 ° or more and 60 ° or less with respect to the vertical direction, preferably 45 ° with respect to the vertical direction. Further, a plurality of inner peripheral injection flow paths 36 and outer peripheral injection flow paths 37 are provided along the annular direction in a plan view. In the second example, the entire upper portion of the furnace body 32 extends along the annular direction. Is arranged. Further, the intermediate injection flow path 38 is all disposed between the inner peripheral injection flow path 36 and the outer peripheral injection flow path 37 that are close to each other.

  The effect | action of the 2nd example of the form which implements the tar reforming furnace of this invention is demonstrated.

  When reforming the gasification gas tar in the tar reforming furnace 31 of the second example, the gasification gas generated from the fluidized bed gasification furnace 2 is replaced with the piping 40 of the reforming line 10 or the gasification gas introduction chamber. It is introduced into a plurality of injection passages 36 on the inner peripheral side via 39 and the like, and is injected radially downward in the furnace main body 32 in a side view and radially outward in a plan view. At the same time, the gasified gas is introduced into the plurality of outer peripheral injection flow paths 37 and injected into the furnace body 32 obliquely inward and downward as viewed from the side and from the outside toward the annular radial direction as viewed in plan. In the furnace main body 32, the gasified gas causes an alternate injection direction in a plan view by the inner peripheral injection passage 36 and the outer peripheral injection passage 37, and forms a small vortex that turns downward while turning. . In the whole furnace main body 32, a plurality of uniform small vortices are formed along the annular direction in plan view by a plurality of combinations of the injection passage 36 on the inner peripheral side and the injection passage 37 on the outer peripheral side. On the other hand, an oxidant such as air or high-concentration oxygen is injected downward in the vertical direction into the furnace main body 32 through the piping 41 of the oxidant supply line 27 and the intermediate injection flow path 38 in a side view. The mixture is stirred and mixed while flowing down to the center of the small vortex and being entrained in the gasification gas. Here, the formation of the vortex structure has almost the same reason as in the first example.

  And in the furnace main body 32, a part of hydrocarbon and hydrogen gas of gasification gas are burned with an oxidizing agent, and the inside of the furnace main body 32 is brought into a high temperature state of about 1000 ° C. or more, and tar is generated by water vapor contained in the gasification gas. To reform.

  After that, the reformed reformed gas is discharged from the outlet 18 (see FIG. 1) to the downstream side of the reforming line 10 in the same manner as in the first example, and a heat exchanger (hereinafter not shown), cooling It is processed via a vacuum vessel, an induction fan (IDF), a desulfurizer, a demineralizer, etc., and finally led to a flare stack or the like.

  Thus, according to the 2nd example of the form of the tar reforming furnace 31, the same effect as the 1st example can be obtained.

  Further, in the second example of the form of the tar reforming furnace 31, the inner peripheral injection passage 36 and the outer peripheral injection passage 37 are arranged concentrically, and the inner peripheral injection passage 36 and the outer peripheral injection are arranged. It is configured to introduce gasified gas into the flow path 37, and further, an intermediate injection flow path 38 is disposed between the inner peripheral injection flow path 36 and the outer peripheral injection flow path 37. If the oxidant is introduced into the injection flow path 38, a small vortex of the gasification gas can be appropriately formed and the oxidant can be introduced at an appropriate position, and the gasification gas and the oxidant are preferably used. In addition, a high reforming rate can be achieved by sufficiently stirring.

  Moreover, as shown in FIGS. 1 and 6 to 8, the gasification facility 1 includes the above-described tar reforming furnace 31, and a fluidized bed gas for extracting the gasification gas from the raw material and supplying the gas reforming gas to the tar reforming furnace 31. From a gasification furnace 2, a fluidized bed combustion furnace 3 for supplying char and a fluidized medium generated in the fluidized bed gasification furnace 2 and heating the fluidized medium by combustion of char, and an exhaust gas derived from the fluidized bed combustion furnace 3 When the separator 4 is provided that separates the fluidized medium and supplies it to the fluidized bed gasification furnace 2, the gasification gas can be suitably taken out and the gasification gas can be appropriately processed, as in the first example. .

  In addition, this invention is not limited to the above-mentioned Example, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Gasification equipment 2 Fluidized bed gasification furnace 3 Fluidized bed combustion furnace 4 Separator 11 Tar reforming furnace 19 Furnace body 21 Gasification gas injection part 22 Oxidant injection part 23 Inner peripheral side injection flow path 24 Outer peripheral side injection Channel 29 Opening / closing means 30 Control unit 31 Tar reforming furnace 32 Furnace main body 34 Gasified gas injection unit 35 Oxidant injection unit 36 Inner peripheral injection channel 37 Outer peripheral injection channel 38 Intermediate injection channel 42 Opening / closing Means 46 Controller

Claims (6)

A tar reforming furnace that reforms gasified gas tar by injecting gasified gas and oxidant into the furnace body,
A plurality of injection flow paths formed along the annular circumferential direction at the upper part of the furnace body are arranged on the inner peripheral side and the outer peripheral side, and the inner peripheral injection flow paths are inclined toward the annular radial outer side. While inclining downward, the outer peripheral injection flow path is inclined obliquely downward toward the annular radial inner side,
At least one of a gasified gas or an oxidant is introduced into the inner peripheral injection flow path and the outer peripheral injection flow path, causing alternate injection directions in the furnace body in a plan view, and turning A tar reforming furnace configured to form a downward vortex.   The inner peripheral injection passage and the outer peripheral injection passage are arranged concentrically to introduce gasified gas into the inner peripheral injection passage, and an oxidant is introduced into the outer peripheral injection passage. The tar reforming furnace according to claim 1, wherein the tar reforming furnace is configured to be introduced.   The inner peripheral injection channel and the outer peripheral injection channel are arranged concentrically, and configured to introduce gasified gas into the inner peripheral injection channel and the outer peripheral injection channel, Further, an intermediate injection flow path is disposed between the inner peripheral injection flow path and the outer peripheral injection flow path, and an oxidant is introduced into the intermediate injection flow path. The tar reforming furnace according to claim 1, wherein the tar reforming furnace is characterized in that:   The tar reforming furnace according to any one of claims 1 to 3, further comprising an opening / closing means for opening and closing the injection flow path and a control unit for controlling the opening / closing means.   The said inner peripheral side injection flow path and the said outer peripheral side injection flow path were made to incline at 30 degrees or more and 60 degrees or less with respect to the perpendicular direction. Tar reforming furnace.   A gasification facility comprising the tar reforming furnace according to any one of claims 1 to 5, wherein a fluidized bed gasification furnace that takes out the gasification gas from a raw material and supplies the gasification gas to the tar reforming furnace, and the flow A fluidized bed combustion furnace for supplying char and a fluidized medium generated in a bed gasification furnace and heating the fluidized medium by combustion of the char; and the fluidized bed by separating the fluidized medium from the exhaust gas derived from the fluidized bed combustion furnace. A gasification facility comprising a separator for supplying to a gasification furnace.

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