JP2021109734A - Solid fuel carrier device - Google Patents

Abstract

To provide a solid fuel carrying-in device capable of carrying solid fuel at a reactor at a carrying-in destination without causing a bridge to be formed.SOLUTION: A carrier device 20 is configured to carry semi-carbonized wood chips to a reactor 11, and includes a tubular vertical carrying path 50 for carrying the semi-carbonized wood chips S to the reactor 11, and a tubular upstream-side carrying path 40 which is provided with a feed opening 41a for feeding the semi-carbonized chips S on one end side, the other end being connected to the vertical carrying path 50 to cross the vertical carrying path 50. The vertical carrying path 50 comprises a vertical screw blade 52, formed spirally along a vertical direction and rotating on a vertical axis as an axis of rotation, in a tube, and the upstream-side carrying path 40 comprises an upstream-side screw blade 43, formed spirally and carrying the semi-carbonized chips S toward the vertical carrying path 50 through the rotation, in a tube.SELECTED DRAWING: Figure 2

Description

The present invention relates to a solid fuel transfer device for transporting solid fuel to a reaction tower such as a gasifier that gasifies solid fuel.

Conventionally, coal, charcoal, etc. have been used as solid fuels, but in recent years, as a substitute for these solid fuels, naturally-derived biomass fuels that can generate relatively high-calorie combustion gas by burning have been used. Attention has been paid.

As a transport device for transporting such solid fuel to a reaction tower for gasifying, for example, Patent Document 1 is a transport device for transporting solid fuel along a horizontal direction and charging the solid fuel from above the reaction tower for generating combustion gas. It is disclosed in.

More specifically, the transport device described in Patent Document 1 is provided with a tubular transport path on which one end side is connected to the bottom of a surge tank for storing solid fuel and the other end side is connected to a inlet in a reaction tower. It has horizontal screw blades that are rotatably provided inside the road. By rotating the horizontal screw blades, the solid fuel can be pushed horizontally along the transport path, and the solid fuel can be charged from the inlet.

However, in the transport device disclosed in Patent Document 1, when the solid fuel is transported to the reaction tower, the solid fuels charged inside the reaction tower are piled up, and the solid fuels may form a bridge. When such a bridge is formed, the density of solid fuel becomes non-uniform inside the reaction tower.

For example, when the reaction tower is a gasification furnace and the density of the solid fuel is non-uniform, there is a problem that the temperature around the solid fuel is not uniform and gasification is not efficient. Further, when the reaction tower is a storage hangar, the bulk increases unnecessarily. For this reason, it was preferable that the density of solid fuel was uniform inside the reaction column.

Japanese Unexamined Patent Publication No. 2009-97073

In view of the above problems, it is an object of the present invention to provide a solid fuel carrying device capable of carrying solid fuel without forming a bridge in the reaction tower of the carrying destination.

The present invention is a solid fuel transport device for transporting solid fuel to a reaction tower, in which a tubular first transport path for transporting the solid fuel to the reaction tower and input for charging the solid fuel to one end side. A port is provided, and the other end side is composed of a tubular second transport path connected to the first transport path so as to intersect the first transport path, and the first transport path is in the pipe in the vertical direction. A first screw blade that is spirally formed along the fuel and rotates about an axis along the vertical direction as a rotation axis is provided, and the second transport path is spirally formed in a pipe and is also provided. A second screw blade for transporting the solid fuel toward the first transport path by rotation is provided, and the second screw blade is rotated to transfer the solid fuel from one end side to the other end of the second transport path. The solid fuel transported by the second transport path is transported toward the side, and the solid fuel is conveyed from the lower side to the upper side of the reaction tower by rotating the first screw blade.
The solid fuel includes, for example, biological-derived solid fuel such as biomass, heat-treated biomass, and solid fuel such as coal and charcoal.

The reaction tower may be, for example, a gasification furnace for heat-treating solid fuel to gasify it, or a storage hangar for accumulating wood chips.
The first transport path does not necessarily have to completely coincide with each other in the vertical direction, and may be inclined by, for example, about ± 30 degrees with respect to the vertical direction.

According to the present invention, when the solid fuel is transported from the second transport path to the first transport path, the solid fuel can be subdivided and transported. As a result, the solid fuel can be transported inside the reaction tower without forming a bridge in the reaction tower to which the solid fuel is carried.

More specifically, the solid fuel carried out from the second transport path by the second screw blade is taken into the first transport path by the first screw blade and transported, but the transport amount of the second screw blade and the first screw By adjusting the transport amount of the blades, the solid fuel can be consolidated and subdivided between the first transport path and the second transport path. By subdividing the solid fuel in this way, it is possible to prevent the solid fuel transported to the reaction tower from forming a bridge.

Further, the solid fuel is transported from the lower side to the upper side by the first transport path. That is, since new solid fuel is transported from below the solid fuel stored inside the reaction tower, the layer of the stored solid fuel can be broken from the inside, and a bridge is temporarily formed inside the reaction tower. Even so, this can be broken.

As described above, since the formation of the bridge by the solid fuel can be prevented, for example, if the reaction tower is a storage hangar for storing the solid fuel, it is possible to prevent the space from being formed between the solid fuels and the bulk increase unnecessarily. Further, when the reaction tower is a gasification furnace, it can be efficiently gasified.

As an aspect of the present invention, a first speed variable unit that changes the rotation speed of the first screw blade and a second speed variable unit that changes the rotation speed of the second screw blade may be provided.
According to the present invention, since the rotation speeds of the first screw blade and the second screw blade can be adjusted individually, the subdivision size of the solid fuel transported from the first transport path to the reaction tower can be adjusted, and the inside of the reaction tower can be adjusted. The density of the solid material can be changed.

More specifically, the rotational speeds of the first screw blade and the second screw blade are adjusted so that the amount of the first screw blade that can carry the solid fuel is less than the amount that the second screw blade can carry the solid fuel. Can be done. In this case, the solid fuel is congested between the first transport path and the second transport path, and the solid fuel is more compacted, so that the solid fuel can be subdivided.

On the contrary, by adjusting the rotation speeds of the first screw blade and the second screw blade so that the amount of the first screw blade that can carry the solid fuel is larger than the amount that the second screw blade can carry the solid fuel. , The compaction of solid fuel can be relaxed. Therefore, the solid fuel can be subdivided so as to be relatively large.

Further, as an aspect of the present invention, the first speed variable portion may adjust the rotation speed of the first screw blade according to the density of the solid fuel charged into the reaction tower.
According to the present invention, the solid fuel transported from the second transport path can be transported to the reaction tower at a desired density. Therefore, the solid fuel can be transported according to the internal state of the reaction tower and the type of the reaction tower.

Further, as an aspect of the present invention, the second speed variable portion may adjust the rotation speed of the second screw blade according to the density of the solid fuel charged into the reaction tower.
According to the present invention, solid fuel having a desired density can be transported to the first transport path. As a result, the solid fuel can be reliably subdivided between the first transport path and the second transport path according to the density of the solid fuel transported to the reaction tower. Therefore, it is possible to more reliably prevent the solid fuel transported to the reaction tower via the first transport path from forming a bridge, and to transport the solid fuel according to the internal state of the reaction tower.

Further, as an aspect of the present invention, the solid fuel is stored, and a storage unit provided with a fuel transport port connected to the input port is provided, and the solid fuel is subdivided by rotation in the fuel transport port. The inlet may be provided with a rotary valve for transporting the solid fuel.

According to the present invention, the solid fuel charged into the second transport path from the inlet can be subdivided by the rotary valve, so that the load for subdividing the solid fuel between the first transport path and the second transport path is increased. It can be mitigated.

Further, since solid fuel having a certain size or smaller is charged into the second transport path, the density range of the solid fuel transported to the reaction tower via the second transport path and the first transport path can be reduced. can. Therefore, the load applied to the first transport path and the second transport path can be reduced, and the bridge phenomenon inside the reaction tower can be prevented more reliably.

Further, as an aspect of the present invention, a subdivision speed variable portion for changing the rotation speed of the rotary valve is provided, and the subdivision speed variable portion is described according to the density of the solid fuel charged into the reaction tower. The rotation speed of the rotary valve may be adjusted.

According to the present invention, solid fuel of a desired size or smaller can be charged into the inlet according to the state of the reaction tower, so that the burden on the first transport path and the second transport path can be further reduced, and more. The bridge phenomenon in the reaction tower can be reliably prevented.

According to the present invention, it is possible to provide a solid fuel carry-in device capable of carrying solid fuel without forming a bridge in the reaction tower of the carry-in destination.

Schematic diagram of the gasification system. The schematic diagram of the transport device and the gasification device. Flow chart of gasification. Schematic diagram of subdivision of wood chips.

One embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a schematic view of a gasification system 1, FIG. 2 shows a schematic view of a gasification reaction device 10 and a transfer device 20, FIG. 3 shows a flowchart of gasification by the gasification system 1, and FIG. 4 shows a surge. The schematic diagram which shows the transport of the semi-carbonized wood chip S stored in the tank 30 is shown.

The gasification system 1 thermally decomposes, burns, and reduces the semi-carbonized wood chips (hereinafter referred to as "semi-carbonized wood chips S") to gasify, and recovers the generated gas G from above. It is a draft gasification system.

Specifically, the gasification system 1 is a reaction tower 11 in which the internal temperature is raised after the semi-carbonized wood chips S are transported upward from the bottom of the reaction tower 11, which is a substantially cylindrical vertical container, by the transport device 20. The semi-carbonized wood chip S is gasified. The produced gas G (carbon monoxide and hydrogen) generated by gasification in this way is released from the discharge pipe 12 provided above the reaction tower 11 and stored in the gas storage unit 60.

Hereinafter, the structure of the gasification system 1, the transfer of the semi-carbonized wood chips S using the transfer device 20, and the gasification in the reaction tower 11 will be described.
As shown in FIG. 1, the gasification system 1 transports the gasification reaction device 10 for gasifying the semi-carbonized wood chip S and the semi-carbonized wood chip S which is a raw material for gasification to the gasification reaction device 10. It is composed of a device 20 and a gas storage unit 60 that stores the generated gas G generated by the gasification reaction device 10.

The gasification reaction apparatus 10 supplies the gasifying agent H from the bottom to the reaction tower 11 for gasifying the semi-carbonated wood chip S, the discharge pipe 12 for discharging the generated gas G generated in the reaction tower 11, and the reaction tower 11. It is composed of a gasifying agent supply pipe 13 to be used. Further, inside the reaction tower 11, a heater 14 for raising the internal temperature of the reaction tower 11, a temperature sensor 15 for detecting the internal temperature of the reaction tower 11, and a semi-carbonized wood chip stored inside the reaction tower 11 are provided. A savings amount detection sensor 16 that detects the savings amount of S is provided.

The reaction column 11 is a substantially cylindrical vertical container, and the bottom surface portion is formed in a conical shape that tapers downward. An insertion hole 11a for connecting to the upstream side transport pipe 41, which will be described later, is provided at the apex portion of the cone. Further, at the bottom of the reaction tower 11, an ash discharge portion 17 for scraping out the residue remaining without completely gasifying the semi-carbonized wood chips S is provided.

When the semi-carbonized wood chip S is gasified, as shown in FIG. 1, a thermal decomposition zone T1 for thermally decomposing the semi-carbonized wood chip S and a thermally decomposed half are inside the reaction tower 11. Three layers, a combustion zone T2 for burning the carbonized wood chips S and a reduction zone T3 for generating the generated gas G (carbon monoxide or hydrogen), are formed in this order from the bottom to the top.

The discharge pipe 12 is a pipe for discharging the generated gas G generated inside the reaction tower 11 to the outside, and is provided in the upper part of the reaction tower 11. As shown in FIG. 2, the discharge tube 12 includes a base end side discharge tube 12a connected to the side wall of the reaction tower 11, a diameter reduction portion 12b whose inner diameter decreases toward the tip side, and a diameter reduction portion 12b. It is integrally composed of a tip side discharge tube 12c connected to the above. The diameter of the distal end side discharge tube 12c is smaller than that of the proximal end side discharge tube 12a.

At the tip of the tip-side discharge pipe 12c, a gas storage unit 60 for storing the produced gas G and a suction device 71 for sucking the produced gas G are provided. Further, a part of the tip side discharge pipe 12c is branched, and a gas analyzer 72 for analyzing the components of the produced gas G is attached.

By this aspirator 71, the discharge pipe 12 becomes a negative pressure, and the generated gas G can be guided to the gas storage unit 60.

The gas analyzer 72 provided in front of the gas storage unit 60 collects the component analysis results of the produced gas G generated in the reaction tower 11, and transmits the analysis results to the rotation control unit 73.
The rotation control unit 73 controls the rotation speeds of the rotary valve 33, the upstream screw blade 43, and the longitudinal screw blade 52, which will be described later, and controls the amount of the semi-carbonized wood chip S transported to the reaction tower 11. There is.

The gasifying agent supply pipe 13 supplies the gasifying agent H (air and water vapor) supplied from the gasifying agent supply device 18 connected to the proximal end side into the inside of the reaction tower 11. The gasifying agent supply pipe 13 is composed of a first supply pipe 13a connected to the bottom of the reaction tower 11 and a second supply pipe 13b connected to the side of the central portion of the reaction tower 11.

The first supply pipe 13a is provided at the central portion of the rotation axis of the vertical screw blade 52 built in the vertical transport pipe 51, which will be described later, and gasifies upward along the longitudinal direction of the vertical transport pipe 51. Agent H can be supplied.

The position and number of the first supply pipe 13a are not limited as long as the gasifying agent H can be supplied upward from the bottom of the reaction tower 11. For example, it may be arranged along the outer peripheral surface of the vertical transport pipe 51, or may be arranged at another place on the bottom of the reaction tower 11.

The second supply pipe 13b is connected to the side surface of the central portion of the reaction tower 11, and the gasifying agent H can be supplied from the side of the reaction tower 11 to the inside. More specifically, it is arranged at a position corresponding to the reduction zone T3 of the reaction tower 11.

The heater 14 is a heating device for heating the inside of the reaction tower 11 to a high temperature state in the initial state of gasifying the semi-carbonized wood chips S. Further, it may be used to raise the internal temperature of the reaction tower 11 when the generated gas G is generated based on the temperature detection result by the temperature sensor 15.

The temperature sensor 15 detects the internal temperature of the reaction tower 11. The detection result detected by the temperature sensor 15 is transmitted to the rotation control unit 73.

The savings amount detection sensor 16 detects the amount of semi-carbonized wood chips S accumulated inside the reaction tower 11. Specifically, inside the reaction tower 11, it is detected whether the accumulated semi-carbonized wood chips S are lower or higher than the desired height. The temperature detection result detected by the savings amount detection sensor 16 is transmitted to the rotation control unit 73. The rotation control unit 73 controls the rotation speeds of the rotary valve 33, the upstream screw blade 43, and the longitudinal screw blade 52, respectively, based on the transmitted result information.

The transport device 20 includes a surge tank 30 for storing the semi-carbonized wood chips S to be transported to the gasification reaction device 10, and an upstream transport path 40 for transporting the semi-carbonized wood chips S from the surge tank 30 to the gasification reaction device 10. It is composed of a vertical transport path 50 for transporting the semi-carbonized wood chips S to the reaction tower 11.

The surge tank 30 is attached between the surge tank main body 31 for storing the semi-carbonized wood chips S, the supply pipe 32 connected to the lower end of the surge tank main body 31, and the surge tank main body 31 and the supply pipe 32. An external screw feeder F is provided, which is composed of the rotary valve 33 and has a rotary motor attached to the upper end.

The supply pipe 32 is a tubular transport path, one end of which is connected to a fuel inlet 31a provided at the lower end of the tapered surge tank main body 31 via a rotary valve 33, and the other end of which is connected to the upstream transport path 40. is doing.
The rotary valve 33 is rotatably configured by the rotary valve motor 34, and the semi-carbonized wood chips S stored in the surge tank main body 31 can be charged into the supply pipe 32. The rotary valve motor 34 is controlled by the rotation control unit 73 as described above. Further, by providing the external screw feeder F, the bridging phenomenon of the semi-carbonized wood tip S in the surge tank main body 31 can be prevented, and the semi-carbonized wood tip S can be more reliably supplied to the supply pipe 32. ..

The semi-carbonized wood chips S stored in the surge tank main body 31 are obtained by thermally decomposing woody biomass such as woody chips at a high temperature of 200 to 350 degrees Celsius under anoxic conditions, and have a large amount of carbon components. It is a carbide. This semi-carbonized wood chip S has a high energy density per weight and good crushing performance.

As shown in FIGS. 1 and 2, the upstream transport path 40 includes an upstream transport pipe 41 configured in a tubular shape and an intermediate transport pipe 42 curved from the lower end of the upstream transport pipe 41 toward the gasification reaction device 10. It is composed of an upstream screw blade 43 inside the upstream transport pipe 41 and a rotary motor 44 that rotationally drives the upstream screw blade 43.

The upstream side transport pipe 41 is a tubular body that is erected along the vertical direction, and is provided on the side with an input port 41a to which the tip of the supply pipe 32 is connected. Further, a rotary motor 44 for rotationally driving the upstream screw blade 43 is provided at the upper end of the upstream transfer pipe 41.

The intermediate transport pipe 42 is a tubular body having an orthogonal cross section orthogonal to the central axis having the same shape as the orthogonal cross section of the upstream transport pipe 41, and is bent in an arc shape as shown in FIG. ing. Further, the base end of the intermediate transport pipe 42 is connected to the upstream transport pipe 41, and the tip is connected to the vertical transport pipe 51 constituting the vertical transport path 50.

The upstream screw blade 43 is a blade used for a so-called spring conveyor, which is configured to be rotatable while bending by forming an elastic member in a spiral shape, and is along the upstream transfer pipe 41 and the intermediate transfer pipe 42. , It extends from the upper end of the upstream transport pipe 41 to the tip of the intermediate transport pipe 42.

The upper end of the upstream screw blade 43 is connected to the rotary motor 44, and the upstream screw blade 43 can freely rotate inside the upstream transfer pipe 41 and the intermediate transfer pipe 42. As a result, the semi-carbonized wood chips S charged from the charging port 41a can be transported to the tip of the intermediate transport pipe 42.
The rotation motor 44 is connected to the rotation control unit 73, and the rotation speed of the upstream screw blade 43 is controlled by the rotation control unit 73.

The vertical transport path 50 includes a tubular vertical transport pipe 51, a vertical screw blade 52 inside the vertical transport pipe 51, and a rotary motor 53 that rotationally drives the vertical screw blade 52. ..
The vertical transport pipe 51 is a tubular body that is erected along the vertical direction, and is arranged below the reaction tower 11. The vertical transport pipe 51 is provided with a connecting portion connected to the side of the central portion so as to be orthogonal to the intermediate transport pipe 42 connected from the lower end of the upstream transport pipe 41.

The vertical screw blade 52 built in the vertical transport pipe 51 is a so-called screw feeder that is spirally formed along the vertical direction and can rotate about an axis along the vertical direction as a rotation axis. The lower end of the vertical screw blade 52 is connected to a rotary motor 53 provided at the lower end of the vertical transport pipe 51, and can freely rotate inside the vertical transport pipe 51.

Further, the vertical screw blade 52 is configured to be longer than the vertical transport pipe 51. Therefore, an exposed portion 52a protruding from the upper end of the vertical transport pipe 51 is formed in the upper portion of the vertical screw blade 52.
The rotation motor 53 is connected to the rotation control unit 73, and the rotation speed of the vertical screw blade 52 is controlled by the rotation control unit 73.

The vertical transport path 50 configured in this way is arranged below the reaction tower 11, and the upper end of the vertical transport pipe 51 is connected to the insertion hole 11a. Therefore, the exposed portion 52a, which is the upper end portion of the longitudinal screw blade 52, protrudes upward from the insertion hole 11a, that is, the bottom portion of the reaction tower 11.

Next, a method of transporting the semi-carbonized wood chips S to the reaction tower 11 using the transport device 20 and gasification in the reaction tower 11 will be briefly described with reference to FIG.
As a preliminary step for operating the gasification system 1, the semi-carbonized wood chip S as a raw material is stored in the surge tank main body 31 (step s0). Since the semi-carbonized wood chips S at the stage of storing in the surge tank main body 31 are semi-carbonized, their mass is reduced to about 45 to 68% as compared with the mass of the wood chips before the semi-carbonized treatment. ing.

First, in order to convey the semi-carbonized wood chip S to the reaction tower 11, the rotary valve 33, the intermediate transfer pipe 42, and the longitudinal screw blade 52 are each rotated (step s1). As a result, the semi-carbonized wood chips S stored in the surge tank main body 31 are conveyed to the supply pipe 32 while being crushed by the rotary valve 33, and are directly introduced into the upstream transfer pipe 41. Further, the semi-carbonized wood chips S thrown into the upstream transport pipe 41 are transported downward along the upstream transport pipe 41 and the intermediate transport pipe 42 by the rotation of the upstream screw blade 43.

Here, by setting the rotation speed of the vertical screw blade 52 to be slower than the rotation speed of the upstream screw blade 43, the semi-carbonized wood chips S are consolidated by the intermediate transfer pipe 42. When the semi-carbonized wood chips S compacted in the intermediate transport pipe 42 are put into the vertical transport pipe 51, they are vertically transported while being subdivided by the vertical screw blades 52 that rotate inside the vertical transport pipe 51. It will be put into the pipe 51.
The semi-carbonized wood chips S thus put into the vertical transport pipe 51 are conveyed to the inside of the reaction tower 11 along the vertical transport pipe 51 by the rotation of the vertical screw blades 52.

The semi-carbonized wood chips S charged into the reaction tower 11 in this way are subdivided to about one-half to one-third the size of the semi-carbonized wood chips S stored in the surge tank main body 31. It has been carbonized. Therefore, the semi-carbonized wood chips S are accumulated inside the reaction tower 11 without forming a bridge (see FIG. 4).

A temperature sensor 15 is provided inside the reaction tower 11 to detect the internal temperature of the reaction tower 11 (step s2). The temperature detection result detected by the temperature sensor 15 is transmitted to the rotation control unit 73, and the rotation control unit 73 has the rotary valve 33, the upstream screw blade 43, and the vertical screw based on the transmitted detection result information. The rotation speed of the blade 52 is controlled to adjust the transport amount of the semi-carbonized wood chip S (step s6).

Similarly, the accumulated amount of the semi-carbonized wood chips S accumulated inside the reaction tower 11 by the savings amount detection sensor 16 is also detected (step s3), and the detection result is transmitted to the rotation control unit 73. Then, the rotation control unit 73 controls the rotation speeds of the rotary valve 33, the upstream screw blade 43, and the vertical screw blade 52 based on the transmitted detection result information, and adjusts the amount of the semi-carbonized wood chip S to be conveyed. Yes (step s6).

Furthermore, the components of the produced gas G generated from the reaction tower 11 are analyzed by the gas analyzer 72 attached in front of the gas storage unit 60 (step s4). This analysis result is also transmitted to the rotation control unit 73, and the rotation control unit 73 controls the rotation speeds of the rotary valve 33, the upstream screw blade 43, and the longitudinal screw blade 52 based on the transmitted analysis result information. , The transport amount of the semi-carbonized wood chip S is adjusted (step s6).

For example, when the temperature sensor 15 detects that the internal temperature of the reaction tower 11 is lower than the optimum temperature (step s2: No), the semi-carbonized wood chip S conveyed to the reaction tower 11 cannot be efficiently gasified. .. In this case, the rotation control unit 73 that receives the temperature detection result controls the rotary valve motor 34 to increase the rotation speed of the rotary valve 33 to increase the number of semi-carbonized wood chips S conveyed to the supply pipe 32. be able to.

Further, the rotation control unit 73 controls the rotation motor 44 and the rotation motor 53, and adjusts the rotation speeds of the upstream screw blade 43 and the longitudinal screw blade 52 to obtain the semi-carbonated wood chip S in the intermediate transfer pipe 42. The semi-carbonated wood chip S can be subdivided by making it more compact. Specifically, by making the rotation speed of the upstream screw blade 43 faster than the rotation speed of the longitudinal screw blade 52 (step s6), a large amount of semi-carbonized wood chips S transported from the surge tank 30 are transferred to the intermediate transport pipe. It will be clogged a lot at 42, and it will be more compacted. Since the semi-carbonized wood chips S thus consolidated are conveyed to the reaction tower 11 by the vertical screw blades 52, the semi-carbonized wood chips S can be further subdivided.
As a result, the semi-carbonized wood chips S transported to the reaction tower 11 are efficiently gasified, and the internal temperature of the reaction tower 11 can be raised.

Similarly, when the amount of the semi-carbonized wood chips S inside the reaction tower 11 is decreasing, the savings amount detection sensor 16 detects an increase in the semi-carbonized wood chips S (step s3: No), and the amount of the semi-carbonized wood chips S is increased. Information is transmitted to the rotation control unit 73. Based on this information, the rotation control unit 73 controls the rotation motor 44 to increase the rotation speed of the upstream screw blade 43, and the rotation control unit 73 controls the rotation motor 53 to rotate the vertical screw blade 52. The speed can be increased (step s6), the amount of the semi-carbonized wood chips S transported to the reaction tower 11 can be increased, and the gasification of the semi-carbonized wood chips S can be promoted.

On the contrary, when the amount of the semi-carbonized wood chips S accumulated inside the reaction tower 11 is increasing, the storage amount detection sensor 16 detects the increase of the semi-carbonized wood chips S (step s3: No). , The information is transmitted to the rotation control unit 73. Based on this information, the rotation control unit 73 reduces the rotation speed of the longitudinal screw blade 52 (step s6), and the semi-carbonized wood chips S are further consolidated in the intermediate transfer pipe 42. As a result, the more subdivided semi-carbonized wood chips S can be conveyed to the reaction tower 11 by the vertical screw blades 52.
Therefore, since the semi-carbonized wood chips S can be subdivided while reducing the amount of the semi-carbonized wood chips S transported, the surface area of the semi-carbonized wood chips S can be expanded and gasification can be performed efficiently.

Similarly, when the component of the generated gas G detected by the gas analyzer 72 is not the desired ratio (step s4: No), the rotation control unit 73 rotates the rotary valve motor 34 based on this information. The motor 44 and the rotary motor 53 are controlled to adjust their respective rotation speeds (step s6). As a result, the amount, size, and density of the semi-carbonized wood chips S transported to the reaction tower 11 are adjusted, and the component of the produced gas G becomes an appropriate ratio.

In this way, until a predetermined amount of produced gas G is obtained (step s5), the rotation speeds of the rotary valve 33, the upstream screw blade 43, and the longitudinal screw blade 52 are adjusted according to the internal condition of the reaction tower 11. Repeatedly, the semi-carbonized wood chip S is gasified in a desired state. Then, after obtaining a predetermined amount of the generated gas G, the rotation of the rotary valve 33, the upstream screw blade 43, and the longitudinal screw blade 52 is stopped, and the gasification is completed.

By controlling the gasifying agent supply device 18 with the rotation control unit 73, the supply amount of the gasifying agent H supplied from the first supply pipe 13a and the second supply pipe 13b is controlled, and the inside of the reaction tower 11 is controlled. It is also possible to adjust the gasification in.

The transport device 20 configured in this way is a device for transporting the semi-carbonized wood chips S to the reaction tower 11, and includes a tubular vertical transport path 50 for transporting the semi-carbonized wood chips S to the reaction tower 11. , A loading port 41a for inserting the semi-carbonized wood chips S is provided on one end side, and is composed of a tubular upstream transport path 40 connected to the vertical transport path 50 so that the other end side intersects the vertical transport path 50. Has been done. The vertical transport path 50 is provided with a vertical screw blade 52 that is spirally formed in the pipe along the vertical direction and rotates about an axis along the vertical direction as a rotation axis. The upstream side transport path 40 is provided with an upstream side screw blade 43 that is spirally formed in the pipe and that conveys the semi-carbonized wood chips S toward the vertical transport path 50 by rotation. Then, the upstream screw blade 43 is rotated to convey the semi-carbonized wood tip S from one end side to the other end side of the upstream transport path 40, and the semi-carbonized wood chip S conveyed by the upstream transport path 40. The tip S is conveyed from the lower side to the upper side of the reaction tower 11 by rotating the vertical screw blade 52.

As a result, when the semi-carbonized wood chips S are transported from the upstream transport path 40 to the vertical transport path 50, the semi-carbonized wood chips S can be subdivided and transported, and the semi-carbonized wood chips S can be transported inside the reaction tower 11. The chip S can convey the semi-carbonized wood chip S without forming a bridge in the reaction tower 11 to which the chip S is carried.

More specifically, the semi-carbonized wood chip S carried out from the upstream transport path 40 by the upstream screw blade 43 is taken into the vertical transport path 50 by the vertical screw blade 52 and transported, but the upstream screw blade By adjusting the transport amount of 43 and the transport amount of the vertical screw blade 52, the semi-carbonized wood chip S can be compactly subdivided between the vertical transport path 50 and the upstream transport path 40. By subdividing the semi-carbonized wood chips S in this way, it is possible to prevent the semi-carbonized wood chips S transported to the reaction tower 11 from forming a bridge, and the subdivided semi-carbonized wood chips S can be prevented from forming a bridge. The surface area is expanded and gasification can be performed efficiently.

Further, the semi-carbonized wood chips S are transported from the lower side to the upper side by the vertical transport path 50. That is, since the new semi-carbonized wood chips S are conveyed from below the semi-carbonized wood chips S accumulated inside the reaction tower 11, the layer of the accumulated semi-carbonized wood chips S can be broken from the inside, and the reaction tower 11 can be broken down. Even if a bridge is formed inside the eleven, it can be broken.

In this way, since the formation of a bridge by the semi-carbonized wood chips S can be prevented, for example, if the reaction tower 11 is a storage vault for storing the semi-carbonized wood chips S, a space is formed between the semi-carbonized wood chips S. It is possible to prevent the bulk from increasing unnecessarily. Further, when the reaction tower 11 is a gasification furnace, it can be efficiently gasified.

Further, by providing the rotation motor 53 for changing the rotation speed of the vertical screw blade 52 and the rotation motor 44 for changing the rotation speed of the upstream screw blade 43, the rotation control unit 73 and the vertical screw blade 52 The rotation speed of the upstream screw blade 43 can be adjusted individually. Therefore, since the rotation speeds of the vertical screw blade 52 and the upstream screw blade 43 can be adjusted individually, the subdivision size of the semi-carbonized wood chip S transported from the vertical transport path 50 to the reaction tower 11 can be adjusted. The density of the semi-carbonized wood chips S inside the reaction column 11 can be changed.

More specifically, the rotation control unit 73 performs the vertical direction so that the amount of the vertical screw blade 52 capable of transporting the semi-carbonized wood chip S is smaller than the amount of the upstream screw blade 43 capable of transporting the semi-carbonized wood chip S. The rotation speeds of the screw blade 52 and the upstream screw blade 43 can be adjusted. In this case, the semi-carbonized wood chips S are congested between the vertical transport path 50 and the upstream transport path 40, and the semi-carbonized wood chips S are more compacted, so that the semi-carbonized wood chips S can be subdivided.

On the contrary, the vertical screw blade 52 and the upstream screw so that the amount of the vertical screw blade 52 capable of transporting the semi-carbonized wood chip S is larger than the amount of the upstream screw blade 43 capable of transporting the semi-carbonized wood chip S. By adjusting the rotation speed of the blade 43, the compaction of the semi-carbonized wood chip S can be relaxed. Therefore, the semi-carbonized wood chips S can be subdivided so as to be relatively large.

Further, in the rotary motor 53, the rotation speed of the vertical screw blade 52 is adjusted by the rotation control unit 73 according to the density of the semi-carbonized wood chips S thrown into the reaction tower 11, so that the upstream side transport path 40 The semi-carbonized wood chips S transported from the above can be transported to the reaction tower 11 at a desired density. Therefore, the semi-carbonized wood chips S can be conveyed according to the internal state of the reaction tower 11 and the type of the reaction tower 11.

Furthermore, the rotary motor 44 has a desired density by adjusting the rotation speed of the upstream screw blade 43 by the rotation control unit 73 according to the density of the semi-carbonized wood chips S charged into the reaction tower 11. The semi-carbonized wood chip S can be transported to the vertical transport path 50. As a result, the semi-carbonized wood chips S can be reliably subdivided between the vertical transport path 50 and the upstream transport path 40 according to the density of the semi-carbonized wood chips S transported to the reaction tower 11. can. Therefore, the semi-carbonized wood chips S transported to the reaction tower 11 via the longitudinal transport path 50 are more reliably prevented from forming a bridge, and the semi-carbonized wood chips are adjusted to the internal state of the reaction tower 11. S can be conveyed.

In addition to storing the semi-carbonized wood chips S, a surge tank 30 provided with a fuel input port 31a connected to the input port 41a is provided, and the fuel input port 31a is subdivided into the semi-carbonized wood chips S by rotation. A rotary valve 33 for conveying the semi-carbonized wood chip S is provided in the inlet 41a.

Therefore, the semi-carbonized wood chips S charged into the upstream transport path 40 from the charging port 41a can be subdivided by the rotary valve 33, so that the semi-carbonized wood chips between the vertical transport path 50 and the upstream transport path 40 can be subdivided. The load for subdividing the chip S can be reduced.

Further, since the semi-carbonized wood chips S having a certain size or less are put into the upstream transport path 40, the semi-carbonized wood chips are conveyed to the reaction tower 11 via the upstream transport path 40 and the vertical transport path 50. The width of the density of S can be reduced. Therefore, the load applied to the vertical transport path 50 and the upstream transport path 40 can be reduced, and the bridge phenomenon inside the reaction tower 11 can be prevented more reliably.

Furthermore, a rotary valve motor 34 for changing the rotation speed of the rotary valve 33 is provided, and the rotary valve motor 34 is a rotation control unit 73 according to the density of the semi-carbonized wood chips S charged into the reaction tower 11. By adjusting the rotation speed of the rotary valve 33 with The load on the 50 and the upstream transport path 40 can be further reduced, and the bridge phenomenon in the reaction tower 11 can be prevented more reliably.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The solid fuel corresponds to the semi-carbonized wood chip S, and similarly the reaction tower corresponds to the reaction tower 11.
The solid fuel transfer device corresponds to the transfer device 20.
The first transport path corresponds to the vertical transport path 50 and
The slot corresponds to the slot 41a and
The second transport path corresponds to the upstream transport path 40 and
The first screw blade corresponds to the vertical screw blade 52,
The second screw blade corresponds to the upstream screw blade 43,
The first speed variable part corresponds to the rotary motor 53 and
The second speed variable part corresponds to the rotary motor 44 and
The fuel transport port corresponds to the fuel inlet 31a and
The savings unit corresponds to the surge tank 30 and
The rotary valve corresponds to the rotary valve 33,
The subdivision speed variable portion corresponds to the rotary valve motor 34,
The present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

For example, in the present embodiment, the semi-carbonized wood chip S is a semi-carbonized wood chip, but the semi-carbonized wood chip S is not limited to the semi-carbonized wood chip S, for example, a biological wood chip such as biomass, or a heat-treated biomass. , Coal or charcoal may be used.

Further, in the present embodiment, the reaction tower 11 is a gasification furnace in which the semi-carbonized wood chips S are heat-treated and gasified, but for example, it may be a storage hangar for accumulating the wood chips.

That is, the transport device 20 is not particularly limited as long as it transports the solid fuel to the container for storing the target solid fuel.

Further, for example, in the present embodiment, the vertical transport path 50 is erected in the vertical direction (vertical direction) with respect to the reaction tower 11, but it is not necessary to completely coincide with the vertical direction. For example, the vertical transport path 50 may be tilted by about ± 45 degrees with respect to the vertical direction.

Further, in the present embodiment, the intermediate transport pipe 42 and the vertical transport pipe 51 are orthogonal at the connecting portion, but it is not always necessary to be orthogonal, and the intermediate transport pipe 42 and the vertical transport pipe 51 intersect with each other. For example, the intermediate transfer pipe 42 may be along the horizontal direction. Further, the upstream transport pipe 41 may not be arranged along the vertical direction, and the upstream transport pipe 41 and the vertical transport pipe 51 may be directly connected to each other.

Furthermore, the upstream screw blade 43 extends from the upper end of the upstream transport pipe 41 to the tip of the intermediate transport pipe 42 along the upstream transport pipe 41 and the intermediate transport pipe 42. However, the present invention is not limited to this configuration. , A so-called spring conveyor blade such as the upstream screw blade 43 that can transmit the rotation of the screw feeder provided inside the upstream side transport pipe 41 may be used.

11 Reaction tower 20 Conveyor device 30 Surge tank 31a Fuel inlet 33 Rotary valve 34 Rotary valve motor 40 Upstream transport path 41a Input port 43 Upstream screw blade 44 Rotating motor 50 Vertical transport path 52 Vertical screw blade 53 Rotating motor S Semi-carbonized wood chips

Claims (6)

A solid fuel transfer device that transports solid fuel to the reaction tower.
A tubular first transport path for transporting the solid fuel to the reaction tower,
A charging port for charging the solid fuel is provided on one end side, and the other end side is composed of a tubular second transport path connected to the first transport path so as to intersect the first transport path.
In the first transport path,
The pipe is provided with a first screw blade that is spirally formed along the vertical direction and rotates about an axis along the vertical direction as a rotation axis.
In the second transport path,
A second screw blade, which is formed in a spiral shape in the pipe and transports the solid fuel toward the first transport path by rotation, is provided.
The second screw blade is rotated to transport the solid fuel from one end side to the other end side of the second transport path, and the solid fuel conveyed by the second transport path is first. A solid fuel transfer device that rotates a screw blade to transfer from the bottom to the top of the reaction tower. The first speed variable part that changes the rotation speed of the first screw blade,
The solid fuel transfer device according to claim 1, further comprising a second speed variable portion for changing the rotation speed of the second screw blade. The first speed variable unit is
The solid fuel transfer device according to claim 2, wherein the rotation speed of the first screw blade is adjusted according to the density of the solid fuel charged into the reaction tower. The second speed variable unit is
The solid fuel transfer device according to claim 2 or 3, wherein the rotation speed of the second screw blade is adjusted according to the density of the solid fuel charged into the reaction tower. In addition to storing the solid fuel, a storage unit provided with a fuel transport port connected to the input port is provided.
The solid fuel transport according to any one of claims 1 to 4, wherein the fuel transport port is provided with a rotary valve that subdivides the solid fuel by rotation and transports the solid fuel to the input port. Device. A subdivision speed variable portion for adjusting the rotation speed of the rotary valve is provided.
The subdivision speed variable portion is
The solid fuel transfer device according to claim 5, wherein the rotation speed of the rotary valve is adjusted according to the density of the solid fuel charged into the reaction tower.

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