JP7311044B2 - Gasification gas production equipment - Google Patents

Description

The present disclosure relates to gasification gas production equipment. This application claims the benefit of priority based on Japanese Patent Application No. 2020-83616 filed on May 12, 2020, the content of which is incorporated herein by reference.

Gasification gas production equipment has been developed as a technique for gasifying raw materials using a fluidized bed such as silica sand. For example, Patent Literature 1 discloses a gasification gas production apparatus including a combustion tower, a cyclone, and a gasification tower.

The combustion tower of Patent Document 1 burns fuel with air to produce flue gas and heats circulating particles. The cyclone solid-gas separates the mixture of flue gas and circulating particles produced in the combustion tower. The hot circulating particles separated by the cyclone are directed to the gasification tower. The gasification tower forms a fluidized bed of hot circulating particles. Then, when the raw material is supplied to the gasification tower, the raw material is gasified by the heat of the fluidized bed (circulating particles) to generate a gasified gas.

JP 2014-240472 A

In the gasification gas production apparatus using the fluidized bed, there is a demand for the development of a technique for efficiently gasifying raw materials.

In view of such problems, an object of the present disclosure is to provide a gasification gas production apparatus capable of efficiently gasifying raw materials.

In order to solve the above problems, a gasification gas production apparatus according to an aspect of the present disclosure includes a top surface portion, a bottom surface portion provided below the top surface portion, and a side surface portion connected to the top surface portion and the bottom surface portion. through a gasifier having a gasifier, a raw material supply port provided on a side surface, a raw material supply unit for supplying raw materials into the gasification furnace, and a fluidized medium supply port provided on one or both of the upper surface and the side surface, It has a fluidizing medium supply unit for supplying the fluidizing medium into the gasification furnace, and a guide plate protruding into the gasification furnace from above the raw material supply port in the side part, and dropped into the gasification furnace through the fluidization medium supply port. and a guide against which at least part of the flowing medium impinges.

In order to solve the above problems, another gasification gas production apparatus according to an aspect of the present disclosure includes a top surface portion, a bottom surface portion provided below the top surface portion, and a side surface portion connected to the top surface portion and the bottom surface portion. a raw material supply unit for supplying raw materials into the gasification furnace through a raw material supply port provided in the side surface ; a fluidizing medium supply unit having a supply chamber communicating with the fluidizing medium supply port and supplying the fluidizing medium into the gasification furnace through the supply chamber and the fluidizing medium supply port; a guide portion having a guide plate provided in the supply chamber and with which at least part of the fluidized medium guided to the supply chamber collides , and the tip of the guide plate faces the first side wall and the second side wall. and collides with the guide plate, the fluidized medium falls through the gap between the tip of the guide plate and the second side wall, and is supplied into the gasification furnace through the fluidized medium supply port.

Also, the guide may hold the fluid medium on the guide plate.

In addition, the gasification gas production apparatus has a collecting plate projecting into the gasification furnace from a side portion, and has a collecting portion against which at least part of the fluidized medium that has fallen into the gasification furnace through the fluidized medium supply port collides. may

Further, the gasification furnace has a first side surface and a second side surface facing the first side surface, and the fluidizing medium supply port includes the first fluidizing medium supply port and the second fluidizing medium supply port. and a fluidizing medium supply port, the gasification gas production apparatus has an aggregate plate projecting into the gasification furnace from the first side surface, and dropped into the gasification furnace through the first fluidizing medium supply port. It has a first collecting portion with which at least part of the fluidized medium collides, and a collecting plate protruding into the gasification furnace from the second side surface portion, and dropped into the gasification furnace through the second fluidized medium supply port. and a second converging portion against which at least a portion of the flowing medium impinges.

In addition, the first converging portion and the second converging portion have a drop location for the fluidized medium that collides with the first converged portion and falls, and a drop location for the fluidized medium that collides with the second converged portion and drops. may be provided in the gasification furnace so that at least a portion of the overlaps.

Further, the gasification furnace may include a fluidizing medium discharge port provided in the side portion, and the fluidizing medium supply port may be provided between the raw material supply port and the fluidizing medium discharge port.

According to the present disclosure, it becomes possible to efficiently gasify the raw material.

FIG. 1 is a diagram for explaining a gasification gas production apparatus according to a first embodiment. FIG. 2 is a diagram for explaining the gasification furnace according to the first embodiment. FIG. 3 is a cross-sectional view of the storage tank taken along line III-III in FIG. FIG. 4 is a perspective view of a guide plate. FIG. 5 is a diagram illustrating a gasification gas production apparatus according to a second embodiment. FIG. 6 is a diagram illustrating a gasification furnace according to the second embodiment. FIG. 7 is a cross-sectional view of the storage tank taken along line VII-VII in FIG. FIG. 8 is a diagram for explaining a fluid medium supply unit according to the third embodiment. FIG. 9 is a diagram for explaining a fluid medium supply unit according to the fourth embodiment.

Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in such embodiments are merely examples for facilitating understanding, and do not limit the present disclosure unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are given the same reference numerals to omit redundant description, and elements that are not directly related to the present disclosure are omitted from the drawings. do.

[First Embodiment]
FIG. 1 is a diagram illustrating a gasification gas production apparatus 100 according to the first embodiment. The gasification gas production apparatus 100 uses a fluidized bed of a fluidized medium to gasify raw materials to produce gasification gas. The fluid medium is, for example, silica sand having a particle size of about 300 μm. The gasification gas production apparatus 100 of this embodiment is a circulating fluidized bed gasification apparatus.

As shown in FIG. 1, the gasification gas production apparatus 100 includes a combustion furnace 110, a first duct 112, a second duct 114, a cyclone 120, a third duct 122, a raw material supply section 130, a gasification It includes a furnace 140 , a fourth duct 146 and a refiner 150 . In addition, in FIG. 1, the solid arrow indicates the flow of the solid matter. Solids are, for example, fluid media, raw materials, and unburned char. Moreover, in FIG. 1, the dashed arrow indicates the gas flow. Gases are, for example, gasification gas, flue gas, fluidization gas, and air.

The combustion furnace 110 is cylindrical. The first duct 112 connects the lower portion of the combustion furnace 110 and the gasification furnace 140, which will be described later. A loop seal (not shown) is provided in the first duct 112 . Unburned char and fluidized medium are introduced from the gasification furnace 140 into the combustion furnace 110 through the first duct 112 . In the combustion furnace 110, the unburned char is burned with air to heat the fluidized medium to 900°C or higher and 1000°C or lower. When the amount of heat is insufficient, the combustion furnace 110 is replenished with external fuel, hot gas, or the like. The second duct 114 connects the upper portion of the combustion furnace 110 and a cyclone 120, which will be described later. The fluidized medium and flue gas heated in the combustion furnace 110 are delivered to the cyclone 120 through the second duct 114 .

Cyclone 120 is provided above gasification furnace 140 . The cyclone 120 separates solid and gas from the mixture of the fluidized medium and the flue gas introduced from the combustion furnace 110 through the second duct 114 . A third duct 122 (flowing medium supply section) connects the bottom of the cyclone 120 and the gasification furnace 140 . The third duct 122 is provided with a loop seal (not shown). The hot fluidized medium separated by the cyclone 120 is introduced into the gasification furnace 140 through the third duct 122 .

The raw material supply unit 130 supplies the raw material to the gasification furnace 140 . The raw materials are, for example, coal such as lignite, petroleum coke, biomass such as wood chips, and solid raw materials such as tire chips. The raw material supply section 130 includes a hopper 132 , a raw material supply pipe 134 and a rotary valve 136 . The hopper 132 stores raw materials. A raw material supply pipe 134 connects the hopper 132 and the gasification furnace 140 . A rotary valve 136 is provided on the raw material supply pipe 134 . In this embodiment, the hopper 132 is provided above the gasification furnace 140 . Therefore, the raw material stored in the hopper 132 is supplied to the gasification furnace 140 under its own weight by opening the rotary valve 136 .

The gasification furnace 140 is, for example, a bubbling fluidized bed gasification furnace. The gasification furnace 140 fluidizes the high-temperature fluid medium introduced from the cyclone 120 with a fluidizing gas. The fluidizing gas is, for example, water vapor (steam). In addition, the gasification furnace 140 gasifies the raw material (steam gasification) with the heat and steam of the fluidized bed R (fluidized medium) to generate a gasified gas. Gasification gas produced in the gasification furnace 140 is introduced into the purification device 150 through the fourth duct 146 . A fourth duct 146 connects the gasification furnace 140 and the refining device 150 .

Purifier 150 purifies the gasification gas produced by gasification furnace 140 . The purification unit 150 includes, for example, heat exchangers, direct coolers, mist eliminators, boosters, and wastewater treaters.

Then, as described above, the fluidized medium fluidized in the gasification furnace 140 is returned to the combustion furnace 110 through the first duct 112 connecting the gasification furnace 140 and the combustion furnace 110 .

As described above, in the gasification gas production apparatus 100 according to the present embodiment, the fluid medium flows through the combustion furnace 110, the second duct 114, the cyclone 120, the third duct 122, the gasification furnace 140, and the first duct 112. It moves in order and is introduced into the combustion furnace 110 again. As a result, the fluid medium circulates through them.

The flue gas separated by the cyclone 120 is heat-exchanged (cooled) by the heat exchanger 124 . Heat exchanger 124 is, for example, a boiler. The combustion exhaust gas cooled by the heat exchanger 124 is dust-removed by the dust remover 126 . The combustion exhaust gas from which dust has been removed by the dust remover 126 is diffused into the atmosphere via the stack 128 .

In addition, unburned char is introduced into the combustion furnace 110 from the gasification furnace 140 through the first duct 112 . The unburned char is used as fuel in combustion furnace 110 . Unburned char is raw material that has not been completely gasified in the gasification furnace 140 .

The gasification furnace 140, which is characteristic of this embodiment, will be described below.

[Gasification Furnace 140]
FIG. 2 is a diagram illustrating the gasification furnace 140 according to the first embodiment. FIG. 3 is a cross-sectional view of the storage tank 210 taken along line III-III in FIG. 2 and 3 of the present embodiment and the following figures, the X-axis (horizontal direction), Y-axis (horizontal direction), and Z-axis (vertical direction) that intersect vertically are defined as shown. Further, solid arrows in FIG. 2 indicate the flow of the fluid medium. In FIG. 2, dashed arrows indicate the flow of the fluidizing gas and the gasifying gas. In FIG. 2, white circles indicate raw materials. Further, in FIG. 3, solid arrows indicate the flow of raw materials.

As shown in FIG. 2 , the gasification furnace 140 includes a storage tank 210 , a wind box 220 , a fluidizing gas supply section 230 and a guide section 240 .

As shown in FIGS. 2 and 3, the storage tank 210 is a rectangular tubular container with a rectangular horizontal cross section (XY cross section in FIGS. 2 and 3). The storage tank 210 has a top surface portion 212, a bottom surface portion 214, a back surface portion (side surface portion) 216a, a side surface portion 216b, a front surface portion (side surface portion) 216c, and a side surface portion 216d.

The upper surface portion 212 is a substantially rectangular flat plate. The bottom surface portion 214 is provided below the top surface portion 212 . The bottom portion 214 supports a fluidized bed R, which will be described later. The bottom part 214 is a dispersion plate with a plurality of holes. The hole is provided with a jet nozzle formed in a structure into which the fluid medium cannot or hardly penetrates.

Rear portion 216a, side portion 216b, front portion 216c, and side portion 216d are connected to top portion 212 and bottom portion 214, respectively. The back surface portion 216a, the side surface portion 216b, the front surface portion 216c, and the side surface portion 216d are flat plates erected vertically upward from the ends (edges) of the bottom surface portion 214. As shown in FIG. The rear portion 216a is continuous with the side portion 216b and the side portion 216d. The side portion 216b is continuous with the front portion 216c. The front portion 216c is continuous with the side portion 216d. The rear portion 216a faces the front portion 216c. Side portion 216b faces side portion 216d. The upper surface portion 212 is connected to the upper ends of the rear surface portion 216a, the side surface portion 216b, the front surface portion 216c, and the side surface portion 216d.

The fluid medium supply port 212a is formed in the upper surface portion 212 near the rear surface portion 216a. The fluid medium supply port 212a is connected to the third duct 122 (fluid medium supply section). Therefore, the fluid medium separated by the cyclone 120 and passed through the third duct 122 is supplied into the storage tank 210 through the fluid medium supply port 212a.

The gas outlet 212b is formed in the upper surface portion 212 near the front surface portion 216c. Gas outlet 212 b is connected to fourth duct 146 . Therefore, the gasification gas produced by the gasification furnace 140 is led to the fourth duct 146 through the gas outlet 212b.

The raw material supply port 218a is formed in the rear portion 216a. In this embodiment, the raw material supply port 218a is provided above the fluidized bed R. As shown in FIG. The raw material supply port 218 a is connected to the raw material supply pipe 134 of the raw material supply section 130 . Therefore, the raw material is supplied into the storage tank 210 through the raw material supply port 218a.

The fluid medium outlet 218b is formed in the front portion 216c. The fluid medium outlet 218b is connected to the first duct 112 . Therefore, the fluid medium is led to the first duct 112 through the fluid medium outlet 218b.

The wind box 220 is connected below the storage tank 210 . The wind box 220 has a rectangular tubular shape with a horizontal cross section (XY cross section in FIGS. 2 and 3).

The fluidizing gas supply unit 230 supplies fluidizing gas to the wind box 220 . The fluidizing gas supply unit 230 is, for example, a blower or a fan. The fluidizing gas introduced into the wind box 220 by the fluidizing gas supply unit 230 is introduced into the containing tank 210 from the bottom surface part 214 (dispersion plate) of the containing tank 210 . The fluidizing gas supply unit 230 introduces the fluidizing gas into the wind box 220 at a flow rate capable of forming a fluidized bed R of the fluidized medium in the storage tank 210 . Therefore, the hot fluid medium supplied from the fluid medium supply port 212a is fluidized by the fluidizing gas. Thereby, a fluidized bed R (for example, a bubbly fluidized bed) is formed in the storage tank 210 .

The fluid medium is continuously supplied to the storage tank 210 from the fluid medium supply port 212a (cyclone 120). Therefore, the fluid medium supplied from the fluid medium supply port 212a moves toward the fluid medium discharge port 218b, overflows the fluid medium discharge port 218b, and passes through the first duct 112 to the combustion furnace 110. sent back continuously. As a result, the fluidized medium moves from the back surface portion 216a side toward the front surface portion 216c side while forming the fluidized bed R in the storage tank 210 .

Further, as described above, the raw material supplied into the storage tank 210 through the raw material supply port 218a moves from the rear surface portion 216a side to the front surface portion 216c side along with the flow of the fluid medium. The raw material is gasified by the heat of the fluidized bed R (fluidized medium) while moving in the storage tank 210 . The gasification gas thus generated is guided to the refiner 150 (see FIG. 1) through the gas outlet 212b and the fourth duct 146. As shown in FIG.

By the way, raw materials such as coal and biomass have a lower mass density than fluid media such as silica sand. Therefore, when the raw material is supplied from the raw material supply port 218a formed above the fluidized bed R, the raw material drops onto the surface of the fluidized bed R and moves along with the flow of the fluid medium on the surface of the fluidized bed R. will do. That is, the raw material does not settle in the fluidized bed R, but moves linearly in the horizontal direction (the X-axis direction in FIG. 2) on the surface layer of the fluidized bed R and is discharged from the fluidized medium discharge port 218b. In this way, when the raw material moves toward the fluidized medium discharge port 218b along the shortest route, the residence time of the raw material in the storage tank 210 becomes the shortest, and the gasification efficiency of the raw material cannot be improved.

Therefore, as described above, the fluidizing medium supply port 212a of the gasification furnace 140 according to the present embodiment is formed on the upper surface portion 212 on the rear surface portion 216a side. As a result, the fluidized medium falls from the fluidized medium supply port 212a into the storage tank 210 (inside the fluidized bed R). The fluidized medium supply port 212a is designed to have a size that allows the dropped fluidized medium to slip into the fluidized bed R. As shown in FIG.

Therefore, the raw material drops from the fluidized medium supply port 212a, is accompanied by the flow (downward flow) of the fluidized medium that sinks into the fluidized bed R, and sinks into the fluidized bed R together with the fluidized medium. As a result, the gasification gas production apparatus 100 can avoid a situation in which the material moves horizontally only on the surface layer of the fluidized bed R. Therefore, the gasification gas production apparatus 100 can extend the residence time of the raw material, and can improve the gasification efficiency of the raw material.

Further, as shown in FIG. 3, the fluid medium supply port 212a is provided on the upper surface portion 212 at a predetermined distance from the side surface portions 216b and 216d. As a result, it is possible to prevent the fluid medium falling into the storage tank 210 through the fluid medium supply port 212a from coming into contact with the side surfaces 216b and 216d. Therefore, the gasification gas production apparatus 100 can prevent wear of the side portions 216b and 216d due to the fluid medium.

The fluid medium supply port 212a is separated from the side portions 216b and 216d. Therefore, in the surface layer of the fluidized bed R, gaps are formed between the fluidized medium falling from the fluidized medium supply port 212a into the fluidized bed R and the side surfaces 216b and 216d. As indicated by solid arrows in FIG. 3, the raw material moves on the surface of the fluidized bed R in this gap, but bypasses where the fluidized medium falls. Therefore, compared to the case where the raw material moves linearly on the surface layer of the fluid medium from the raw material supply port 218a toward the front surface portion 216c, the gasification gas production apparatus 100 can extend the moving distance of the raw material. can be done. As a result, the gasification gas production apparatus 100 can extend the residence time of the raw material.

As described above, the gasification gas production apparatus 100 of the present embodiment can cause the raw material to settle in the fluidized bed R by accompanying the flow (downward flow) of the fluidizing medium. However, if the fluid medium supply port 212a is brought too close to the back surface portion 216a, the fluid medium contacts the back surface portion 216a. As a result, the rear portion 216a may be worn, or the raw material supply port 218a formed in the rear portion 216a may be blocked.

Therefore, the gasification furnace 140 of this embodiment is provided with a guide portion 240 . The guide part 240 is provided with a water cooling mechanism, is provided with a fireproof lining, or is made of fireproof bricks.

Returning to FIG. 2 , the guide portion 240 includes a plate body 242 (guide plate) and a standing plate 244 . The plate main body 242 is a plate that protrudes horizontally (in the XY direction in FIG. 2) into the storage tank 210 from vertically above the raw material supply port 218a in the rear portion 216a. The base end of the plate body 242 is connected to the rear portion 216a. The plate body 242 faces the fluid medium supply port 212a. In other words, part of the projection surface of the fluid medium supply port 212 a overlaps the plate body 242 . Therefore, at least part of the fluid medium that has dropped into the storage tank 210 through the fluid medium supply port 212a drops toward the plate main body 242 (the guide portion 240).

4 is a perspective view of the guide portion 240. FIG. As shown in FIG. 4 , the standing plate 244 is a plate that stands vertically upward from the edge of the plate body 242 . In this embodiment, the plate main body 242 is a substantially rectangular flat plate. Therefore, three standing plates 244 are provided. Then, the fluid medium is held on the plate body 242 before the gasification gas production apparatus 100 is put into operation. The standing plate 244 prevents the fluid medium held on the plate body 242 from falling.

A portion of the fluidized medium that has dropped through the fluidized medium supply port 212a collides with the fluidized medium held on the plate body 242, and then drops into the fluidized bed R under its own weight.

As described above, the gasification furnace 140 according to this embodiment includes the guide section 240 . The guide part 240 can change the falling trajectory (falling position) of the fluid medium, and can direct the horizontal component force of the downward flow of the fluid medium in the direction of the fluid medium outlet 218b. As a result, the guide portion 240 can secure a space for dropping the raw material onto the surface layer of the fluidized bed R between the downward flow of the fluidized medium that enters the fluidized bed R and the back surface portion 216a. . Therefore, the guide portion 240 can prevent the fluid medium dropped from the fluid medium supply port 212a from coming into contact with the back surface portion 216a. Therefore, the guide part 240 can suppress the wear of the back surface part 216a while causing the raw material to accompany the flow of the fluid medium and settle in the fluidized bed R. Further, the guide portion 240 can avoid a situation in which the raw material supply port 218a formed in the back portion 216a is blocked.

Further, as described above, the fluid medium is held on the guide portion 240 (plate main body 242). Therefore, at least part of the fluid medium that has fallen into the storage tank 210 through the fluid medium supply port 212 a collides with the fluid medium held by the guide portion 240 . As a result, the gasification gas production apparatus 100 can suppress wear of the guide portion 240 due to the dropped fluidized medium.

[Second embodiment]
In the above-described first embodiment, the gasification gas production apparatus 100 includes one cyclone 120 and one third duct 122 as an example. However, multiple cyclones 120 and third ducts 122 may be provided.

FIG. 5 is a diagram illustrating a gasification gas production apparatus 300 according to the second embodiment. The gasification gas production apparatus 300 includes a combustion furnace 110, a first duct 112, second ducts 114A and 114B, cyclones 120A and 120B, third ducts 122A and 122B, a raw material supply section 130, and a gasification furnace. 340 , a fourth duct 146 and a purifier 150 . In addition, in FIG. 5, the raw material supply unit 130 is omitted for easy understanding. Further, solid arrows in FIG. 5 indicate the flow of the solid matter. Solids are, for example, fluid media, raw materials, and unburned char. In FIG. 5, dashed arrows indicate gas flows. Gases are, for example, gasification gas, flue gas, fluidization gas, and air. Constituent elements that are substantially the same as those of the gasification gas production apparatus 100 are denoted by the same reference numerals, and descriptions thereof are omitted.

The second duct 114A connects the upper portion of the combustion furnace 110 and the cyclone 120A. The second duct 114B connects the second duct 114A and the cyclone 120B. The fluidized medium and flue gas heated in the combustion furnace 110 are delivered to the cyclone 120A through the second duct 114A. Also, the fluidized medium and flue gas heated in the combustion furnace 110 are delivered to the cyclone 120B through the second ducts 114A, 114B.

Cyclones 120A and 120B are provided above gasification furnace 340 . The cyclone 120A solid-gas separates the mixture of the fluidized medium introduced from the combustion furnace 110 through the second duct 114A and the flue gas. The cyclone 120B separates solid and gas from the mixture of the fluidized medium and the flue gas introduced from the combustion furnace 110 through the second ducts 114A and 114B.

A third duct 122A (flowing medium supply section) connects the bottom of the cyclone 120A and the gasification furnace 340 . The hot fluid medium separated by the cyclone 120A is introduced into the gasification furnace 340 through the third duct 122A. A third duct 122B (flowing medium supply section) connects the bottom of the cyclone 120B and the gasification furnace 340 . The hot fluid medium separated by the cyclone 120B is introduced into the gasification furnace 340 through the third duct 122B.

FIG. 6 is a diagram illustrating a gasification furnace 340 according to the second embodiment. FIG. 7 is a cross-sectional view of the storage tank 210 taken along line VII-VII in FIG. In FIGS. 6 and 7, solid line arrows indicate the flow of the fluid medium. In FIG. 6 and FIG. 7, dashed arrows indicate the flow of fluidizing gas and gasifying gas. In FIG. 6, white circles indicate raw materials.

As shown in FIGS. 6 and 7, the gasification furnace 340 includes a storage tank 210, a wind box 220, a fluidizing gas supply section 230, a guide section 240, an aggregation section 350A, and an aggregation section 350B. .

As shown in FIGS. 6 and 7, in the second embodiment, the fluid medium supply port 312 (first fluid medium supply port) is formed in the vicinity of the back surface portion 216a in the side surface portion 216d. The fluid medium supply port 312 is connected to the third duct 122A (fluid medium supply section). Therefore, the fluidized medium separated by the cyclone 120A and passed through the third duct 122A is supplied into the storage tank 210 through the fluidized medium supply port 312 .

Further, the fluid medium supply port 314 (second fluid medium supply port) is formed in the vicinity of the back surface portion 216a in the side surface portion 216b. The fluid medium supply port 314 is connected to the third duct 122B (fluid medium supply section). Therefore, the fluidized medium separated by the cyclone 120B and passed through the third duct 122B is supplied into the storage tank 210 through the fluidized medium supply port 314 .

Aggregation portion 350A and aggregation portion 350B are provided above guide portion 240 . Note that the aggregated portion 350A and the aggregated portion 350B differ from the guide portion 240 only in the installation position, and are substantially the same as the guide portion 240 in shape. That is, the aggregated portion 350A and the aggregated portion 350B include the plate body 242 and the standing plate 244. As shown in FIG. The aggregated portion 350A and the aggregated portion 350B are equipped with a water cooling mechanism, refractory lined, or made of refractory bricks.

Therefore, the plate body 242 (first consolidation plate) of the consolidation portion 350A (first consolidation portion) enters the storage tank 210 from vertically below the fluid medium supply port 312 in the side surface portion 216d (first side surface portion). It is a plate that protrudes in the horizontal direction (XY directions in FIGS. 6 and 7). Therefore, at least part of the fluid medium that has dropped into the storage tank 210 through the fluid medium supply port 312 drops toward the plate main body 242 of the consolidation portion 350A.

Similarly, the plate main body 242 (second consolidation plate) of the consolidation portion 350B (second consolidation portion) extends vertically below the fluid medium supply port 314 in the side surface portion 216b (second side surface portion) into the storage tank 210. is a plate projecting in the horizontal direction (XY directions in FIGS. 6 and 7). Therefore, at least part of the fluid medium that has dropped into the storage tank 210 through the fluid medium supply port 314 drops toward the plate main body 242 of the consolidation portion 350B.

In addition, before the gasification gas production apparatus 300 is put into operation, the fluid medium is held on the plate main bodies 242 of the consolidating portions 350A and 350B. The erected plates 244 of the converging portion 350A and the converging portion 350B prevent the fluid medium held on the plate main body 242 from falling.

In addition, the converging portion 350A and the converging portion 350B have a drop location for the fluid medium that collides with the plate body 242 of the consolidating portion 350A and drops, and a drop location for the fluid medium that collides with the plate main body 242 of the consolidating portion 350B and drops. are provided in the storage tank 210 so that at least a part of the overlaps. That is, in the consolidating portion 350A and the consolidating portion 350B, the fluid medium that collides with the plate main body 242 of the consolidating portion 350A and drops, and the fluid medium that collides with the plate main body 242 of the consolidating portion 350B and drops are located at the center of the storage tank 210. are provided in the storage tank 210 so as to join (consolidate) at .

Thereby, the gasification furnace 340 can form a downward flow in the fluidized bed R by the merged fluidized medium. Therefore, the gasification furnace 340 reduces the flow velocity of the downward flow of the fluidized medium as compared to the case where the fluidized medium supplied from the fluidized medium supply port 312 and the fluidized medium supplied from the fluidized medium supply port 314 are not merged. It is possible to make it higher. Thereby, the gasification furnace 340 can cause the downward flow of the fluid medium to reach the vicinity of the bottom surface portion 214 . Therefore, the gasification furnace 340 allows the raw material accompanied by the downward flow of the fluidizing medium to sink into the vicinity of the bottom surface portion 214 . Therefore, the gasification gas production apparatus 300 can further extend the residence time of the raw material, and can further improve the gasification efficiency of the raw material.

In addition, the collecting section 350A and the collecting section 350B collect the fluid medium in the storage tank 210 at the center. As a result, it is possible to avoid a situation in which the fluid medium dropped from the converging portion 350A and the converging portion 350B contacts the side surface portion 216b and the side surface portion 216d. Therefore, the collecting portion 350A and the collecting portion 350B allow the raw material to accompany the flow of the fluidizing medium and settle in the fluidized bed R, while suppressing wear of the side portions 216b and 216d.

In addition, as described above, the collecting portion 350A and the collecting portion 350B are provided above the guide portion 240. As shown in FIG. As a result, the guide portion 240 can prevent the flowing medium dropped from the collecting portion 350A and the collecting portion 350B from contacting the back surface portion 216a and blocking the raw material supply port 218a.

Further, as described above, the fluid medium is held on the aggregated portion 350A (plate main body 242) and on the aggregated portion 350B (plate main body 242). Therefore, at least part of the fluid medium that has fallen into the storage tank 210 through the fluid medium supply port 312 collides with the fluid medium held in the collecting portion 350A. As a result, the gasification gas production apparatus 300 can suppress wear of the aggregated portion 350A due to the dropped fluid medium. Similarly, at least part of the fluid medium that has fallen into the storage tank 210 through the fluid medium supply port 314 collides with the fluid medium held in the collecting portion 350B. As a result, the gasification gas production apparatus 300 can suppress wear of the collecting portion 350B due to the dropped fluid medium.

[Third embodiment]
In the above-described first embodiment, the configuration in which the guide part 240 is provided inside the gasification furnace 140 is taken as an example. However, the guide part 240 may be provided outside the gasification furnace 140 .

FIG. 8 is a diagram illustrating the fluid medium supply unit 430 according to the third embodiment. In FIG. 8, dashed arrows indicate the flow of fluidization gas and gasification gas. In FIG. 8, white circles indicate raw materials. In addition, the same reference numerals are given to components that are substantially the same as those of the gasification gas production apparatus 100 of the first embodiment, and description thereof is omitted.

As shown in FIG. 8 , fluid medium supply section 430 includes third duct 122 and supply chamber 432 . The upper surface of the supply chamber 432 communicates with the third duct 122 . The bottom surface of the supply chamber 432 communicates with the fluid medium supply port 212a.

A first guide 240 (indicated by 240A in FIG. 8) and a second guide 240 (indicated by 2 4 0B in FIG. 8) are provided within the supply chamber 432 . The plate main body 242 of the first guide portion 240A protrudes horizontally into the supply chamber 432 from a front surface portion 432a forming the supply chamber 432. As shown in FIG. At least part of the fluid medium that has dropped into the supply chamber 432 through the third duct 122 collides with the first guide portion 240A.

The second guide portion 240B is provided below the first guide portion 240A. The plate main body 242 of the second guide portion 240B protrudes horizontally into the supply chamber 432 from the rear surface portion 432b forming the supply chamber 432. As shown in FIG. The second guide portion 240B collides with the first guide portion 240A, and at least part of the dropped fluid medium collides therewith. In other words, the second guide portion 240B is provided at a drop position of the fluid medium that collides with the first guide portion 240A and drops. The fluid medium that collides with the second guide portion 240B is supplied to the gasification furnace 140 through the fluid medium supply port 212a.

The second guide portion 240B is located between the back surface portion 216a and the portion where the fluidized medium collides with the plate main body 242 of the second guide portion 240B and drops to drop the raw material on the surface layer of the fluidized bed R. is provided in the supply chamber 432 so as to form a space of .

In this manner, the first guide portion 240A and the second guide portion 240B according to the third embodiment can change the drop trajectory (drop position) of the fluid medium. As a result, the second guide portion 240B can secure a space for dropping the raw material onto the surface of the fluidized bed R between the downward flow of the fluidized medium entering the fluidized bed R and the back surface portion 216a. It becomes possible. Therefore, the second guide portion 240B can prevent the flowing medium from contacting the back portion 216a. Therefore, the second guide portion 240B allows the raw material to accompany the flow of the fluid medium and settle in the fluidized bed R, while suppressing abrasion of the back surface portion 216a. In addition, the second guide portion 240B can prevent the raw material supply port 218a formed in the rear portion 216a from being blocked.

[Fourth embodiment]
In the above-described first embodiment, the case where a portion of the projected surface of the fluid medium supply port 212a overlaps the plate main body 242 of the guide portion 240 was taken as an example. However, the projected plane of the fluid medium supply port 212 a does not have to overlap the plate main body 242 of the guide portion 240 .

FIG. 9 is a diagram illustrating the fluid medium supply unit 530 according to the fourth embodiment. In FIG. 9 , dashed arrows indicate the flow of fluidization gas and gasification gas. In FIG. 9, white circles indicate raw materials. In addition, the same reference numerals are given to components that are substantially the same as those of the gasification gas production apparatus 100 of the first embodiment, and description thereof is omitted.

As shown in FIG. 9 , fluid medium supply section 530 includes third duct 122 and supply chamber 532 . The upper surface of the supply chamber 532 communicates with the third duct 122 . The bottom surface of the supply chamber 532 communicates with the fluid medium supply port 212a.

A first guide 240 (indicated by 240A in FIG. 9) is provided within the supply chamber 532 . The plate main body 242 of the first guide portion 240A protrudes horizontally into the supply chamber 532 from the front surface portion 532a that constitutes the supply chamber 532 . At least part of the fluid medium that has dropped into the supply chamber 532 through the third duct 122 collides with the first guide portion 240A.

The second guide portion 240B is provided inside the gasification furnace 140, like the guide portion 240 of the first embodiment. In addition, in the fourth embodiment, the projected plane of the fluid medium supply port 212a is not superimposed on the plate body 242 of the second guide portion 240B. The fluid medium that has collided with the first guide portion 240A falls to the second guide portion 240B along a parabolic trajectory.

In this manner, the first guide portion 240A and the second guide portion 240B according to the fourth embodiment can change the drop trajectory (drop position) of the fluid medium. As a result, the second guide portion 240B can secure a space for dropping the raw material onto the surface layer of the fluidized bed R between the downward flow of the fluidized medium entering the fluidized bed R and the back surface portion 216a. It becomes possible. Therefore, the second guide portion 240B can prevent the flowing medium from contacting the back portion 216a. Therefore, the second guide portion 240B allows the raw material to accompany the flow of the fluid medium and settle in the fluidized bed R, while suppressing abrasion of the back surface portion 216a. In addition, the second guide portion 240B can prevent the raw material supply port 218a formed in the rear portion 216a from being blocked.

Although the embodiments have been described above with reference to the accompanying drawings, it goes without saying that the present disclosure is not limited to the above embodiments. It is clear that a person skilled in the art can conceive of various modifications or modifications within the scope of the claims, and it is understood that these also belong to the technical scope of the present disclosure. be done.

For example, in the above-described first to fourth embodiments, the storage tank 210 has a rectangular cylindrical shape. However, the storage tank 210 may have a cylindrical shape. For example, the storage tank 210 may have a cylindrical shape, an oval cylindrical shape, or an oblong cylindrical shape. That is, the storage tank 210 may have one side surface.

In addition, in the first to fourth embodiments, the case where the guide portion 240 holds the fluid medium on the plate main body 242 is taken as an example. However, the guide part 240 may not hold the fluid medium. In this case, the guiding part 240 is preferably water-cooled. Similarly, in the second embodiment, the case where the aggregated portion 350A and the aggregated portion 350B hold the fluid medium on the plate main body 242 was taken as an example. However, the aggregation section 350A and the aggregation section 350B may not hold the fluid medium. In this case, the aggregated portion 350A and the aggregated portion 350B are preferably water-cooled.

Further, in the above-described first to fourth embodiments, the case where the guide portion 240 (240A, 240B) includes the standing plate 244 is taken as an example. However, the guide part 240 (240A, 240B) does not have to be provided with the standing plate 244. FIG. Similarly, in the second embodiment, the case where the aggregated portion 350A and the aggregated portion 350B are provided with the erecting plate 244 is taken as an example. However, the aggregated portion 350A and the aggregated portion 350B do not have to be provided with the standing plate 244 . In this case, a rigid body (square bar or rail steel) may be attached to the edge of the plate body 242 . Thereby, the wear resistance and wear margin (life) of the plate body 242 can be improved.

Further, in the above-described first, third, and fourth embodiments, the case where the fluid medium supply port 212a is provided in the upper surface portion 212 is taken as an example. However, the fluid medium supply port 212a may be provided in the rear portion 216a, the side portion 216b, or the side portion 216d. In this case, the aggregating unit 350A or the aggregating unit 350B may be provided. As a result, the gathering portion 350A or the gathering portion 350B causes the raw material to accompany the flow of the fluid medium and settle in the fluidized bed R, while suppressing wear of the back surface portion 216a, the side surface portion 216b, or the side surface portion 216d. becomes possible.

Moreover, the gasification furnace 140 of the first embodiment, the third embodiment, and the fourth embodiment may be provided with a consolidating section 350A. As a result, it is possible to prevent the fluid medium falling into the storage tank 210 through the fluid medium supply port 212a provided on the upper surface portion 212 from contacting the side surface portions 216b and 216d. It should be noted that when the collecting portion 350A is provided, the fluid medium supply port 212a does not have to be separated from the side portions 216b and 216d by a predetermined distance.

Further, in the above-described second embodiment, the case where the collecting portion 350A and the collecting portion 350B are provided above the guide portion 240 is taken as an example. However, the collecting portion 350A and the collecting portion 350B may be provided below the guiding portion 240 . Further, the positions of the consolidating portion 350A and consolidating portion 350B and the guide portion 240 may be equal in the vertical direction.

Also, fluid medium supply ports may be provided in the upper surface portion 212 and the rear surface portions 216a, 216b, and 216c.

Further, in the first embodiment and the second embodiment, the gasification gas production apparatuses 100 and 300 are configured to include the refiner 150 as an example. However, refiner 150 is not an essential component.

Moreover, in the said 1st Embodiment, the structure with which the raw material supply part 130 is provided with the hopper 132 and the rotary valve 136 was mentioned as an example. However, the raw material supply unit 130 is not limited in its configuration as long as the raw material can be supplied to the surface layer of the fluidized bed R formed in the gasification furnace 140 .

100: Gasification gas production device 122: Third duct (fluid medium supply unit) 122A: Third duct (fluid medium supply unit) 122B: Third duct (fluid medium supply unit) 130: Raw material supply unit 140: Gasification furnace 212: Upper surface portion 212a: Fluid medium supply port 214: Bottom surface portion 216a: Side portion 216b: Side portion 216c: Side portion 216d: Side portion 218a: Raw material supply port 218b: Fluid medium discharge port 240: Guide portion 240A: Guide portion 240B : guide part 242: plate body (guide plate, first aggregate plate, second aggregate plate) 300: gasification gas production device 312: fluid medium supply port (first fluid medium supply port) 314: fluid medium supply Port (second fluid medium supply port) 340: Gasification furnace 350A: Aggregation section (first aggregation section) 350B: Aggregation section (second aggregation section) 430: Fluid medium supply section 432: Supply chamber 530: Flow Medium supply unit 532: supply chamber

Claims (7)

a gasification furnace having a top surface, a bottom surface provided below the top surface, and a side surface connected to the top surface and the bottom surface;
a raw material supply unit that supplies raw materials into the gasification furnace through a raw material supply port provided in the side surface;
a fluidizing medium supply unit that supplies a fluidizing medium into the gasification furnace through a fluidizing medium supply port provided in one or both of the top surface and the side surface;
A guide portion having a guide plate protruding into the gasification furnace from above the raw material supply port in the side portion, and with which at least part of the fluidized medium that has fallen into the gasification furnace through the fluidized medium supply port collides. and,
A gasification gas production device comprising: a gasification furnace having a top surface, a bottom surface provided below the top surface, and a side surface connected to the top surface and the bottom surface;
a raw material supply unit that supplies raw materials into the gasification furnace through a raw material supply port provided in the side surface;
It has a supply chamber that communicates with a fluidizing medium supply port provided on either or both of the upper surface portion and the side surface portion of the gasification furnace. a fluid medium supply unit that supplies the medium;
a guide portion having a guide plate protruding from a first side wall that constitutes the supply chamber and provided in the supply chamber, with which at least part of the fluidized medium guided to the supply chamber collides;
with
a tip of the guide plate is separated from a second side wall facing the first side wall;
The fluidized medium collides with the guide plate, falls through the gap between the tip of the guide plate and the second side wall, and is fed into the gasification furnace through the fluidized medium supply port. Manufacturing equipment. 3. The gasification gas production apparatus according to claim 1, wherein the guide portion holds the fluid medium on the guide plate. 4. A collecting portion having a collecting plate protruding into the gasification furnace from the side surface, and collided with at least part of the fluidized medium that has fallen into the gasification furnace through the fluidized medium supply port. The gasification gas production apparatus according to any one of 1. The gasification furnace has a first side surface and a second side surface facing the first side surface,
The fluid medium supply port has a first fluid medium supply port and a second fluid medium supply port,
A first plate having a collecting plate protruding into the gasification furnace from the first side surface, and collides with at least part of the fluidized medium that has fallen into the gasifier through the first fluidized medium supply port. an aggregator;
A second flow medium having a collecting plate protruding into the gasification furnace from the second side surface, and collides with at least part of the fluidized medium that has fallen into the gasifier through the second fluidized medium supply port. an aggregator;
The gasification gas production apparatus according to any one of claims 1 to 3, comprising: The first converging portion and the second converging portion are defined as a drop point for the fluid medium that collides with the first converging portion and drops, and a drop point for the fluid medium that collides with the second converging portion and drops. 6. The gasification gas production apparatus according to claim 5, which is provided in said gasification furnace so as to at least partly overlap with the location. The gasification furnace has a fluidized medium discharge port provided on the side surface,
The gasification gas production apparatus according to any one of claims 1 to 6, wherein the fluid medium supply port is provided between the raw material supply port and the fluid medium discharge port.

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