JP2013087169A - Material charging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material charging device, capable of preventing adhesion of a powdery solid raw material by a simple structure.SOLUTION: The material charging device 200 includes: a body portion (second input shoot 214); an input port (lower opening 214b) provided in the body portion to guide a granular solid raw material group A supplied from a raw material storage unit toward a reaction device (gasification furnace 114); an injection nozzle 218 which inject a fluid toward the input port; and a tubular throat member 220 covering a part of the inner periphery of the body unit and the inner periphery of the input port, the throat member capable of distributing the solid raw material group A and the fluid injected from the injection nozzle 218. The throat member 220 is provided in such a manner that it can be vibrated by the fluid injected from the injection nozzle 218.

Description

  The present invention relates to a raw material charging apparatus for charging a raw material into a reaction apparatus such as a gasification furnace.

  2. Description of the Related Art In recent years, a technology has been developed that gasifies solid raw materials such as coal, biomass, and tire chips to generate gasified gas instead of petroleum. The gasified gas thus generated is used for power generation systems, hydrogen production, synthetic fuel (synthetic petroleum) production, chemical fertilizer (urea) and other chemical products. Among solid raw materials used as raw materials for gasification gas, coal, in particular, has a recoverable period of about 150 years, more than three times the recoverable period of oil, and reserves are unevenly distributed compared to oil. Therefore, it is expected as a natural resource that can be stably supplied over a long period of time.

  As a technique for gasifying coal, a technique for gasifying coal (steam gasification) has been developed in a gasification furnace in which a fluidized medium forms a fluidized bed with steam at about 500 ° C.

  In addition, as a technology for charging solid raw materials such as coal into the gasifier, a raw material storage device is provided vertically above the gasification furnace, and the solid raw material is pulverized by a cutting device disposed below the raw material storage device. A raw material charging apparatus is disclosed in which a solid raw material group is dropped into a gasification furnace by cutting it into granules and dropping the solid raw material group of the granular material into the gasification furnace through piping (for example, Patent Document 1).

  However, when the raw material charging apparatus described in Patent Document 1 is used and a solid raw material group is charged into a gasification furnace that performs steam gasification, a pipe (connecting pipe) that connects the raw material charging apparatus and the gasification furnace is provided. It may become blocked. More specifically, the solid raw material group cut out by the cutting device of the raw material charging device contains not only particles but also fine powder. Since the raw material charging device and the connecting pipe are placed under a temperature (for example, room temperature) lower than the temperature in the gasification furnace (about 500 ° C.), the raw material charging device and the connecting pipe are separated from the gasification furnace. There is a possibility that the water vapor that has flowed back will condense, and the powder of the solid raw material may adhere to and adhere to the connecting pipe.

  Therefore, as a technique for preventing the fluid passing through the pipe from adhering to the pipe, a notch is formed along the outer peripheral surface of the pipe, and a ring-shaped vibrator and a vibrator are vertically installed in the notch. And a spring that abuts the vibrator on the upper surface of the notch by urging upward, and a technique of blowing compressed air between the upper surface of the notch and the vibrator is disclosed (for example, Patent Document 2). In this technology, the compressed air is blown between the upper surface of the notch and the vibrator, so that the vibrator is vibrated in the vertical direction, and the collision between the vibrator and the upper surface (pipe) of the notch is repeated, and the piping is By vibrating, the fluid is prevented from adhering to the piping.

JP 2010-254728 A JP 2006-198965 A

  However, in the technique of Patent Document 2 described above, a notch must be purposely formed in the outer circumferential direction of the pipe, and the thickness of the notch in the pipe is thinner than the thickness of the part without the notch. As a result, the rigidity of the notched portion may be reduced.

  In addition, it is necessary to separately prepare a dedicated device for blowing compressed air specialized for vibration of the vibrator, which increases the cost.

  Accordingly, an object of the present invention is to provide a raw material charging apparatus capable of preventing adhesion of powdery solid raw materials with a simple configuration in view of such problems.

  In order to solve the above problems, a raw material charging apparatus of the present invention is a raw material charging apparatus disposed between a raw material storage section for storing a solid raw material and a reaction apparatus for reacting the solid raw material, and a main body section, , Provided in the main body part, an inlet for guiding the granular solid raw material group supplied from the raw material storage part to the reactor side, an injection nozzle for injecting fluid toward the inlet, and an inner periphery of the main body part A tubular throat member that covers a part of the surface and the inner peripheral surface of the charging port, and is capable of flowing a fluid injected from the solid raw material group and the injection nozzle, and the throat member is formed by the fluid injected from the injection nozzle It is provided so that it can vibrate.

  The raw material charging device includes a connecting pipe portion that connects the charging port and the reaction device, and the throat member covers the inner peripheral surface of the main body located upstream of the charging port in the direction of fluid ejection by the spray nozzle. A main body side covering portion, and a connecting pipe side covering portion that is continuous with the main body side covering portion and covers the inner peripheral surface of the connecting pipe portion that is located downstream of the injection port in the injection direction. The main body side covering portion may be configured to have a shape in which the space in the main body side covering portion gradually narrows from the upstream side to the downstream side in the injection direction.

  The connecting pipe side covering portion is formed in a dimensional relationship such that the clearance between the outer peripheral surface of the connecting tube side covering portion and the inner peripheral surface of the connecting tube portion is 0.05 mm to 0.2 mm. Also good.

  The main body portion is provided vertically above the connecting pipe portion, the injection nozzle injects fluid from the vertical upper direction to the vertical lower direction, and the outer diameter of the main body side covering portion is larger than the diameter of the input port. The main body side covering portion may be hooked on the main body portion.

  The outer peripheral surface of the throat member is formed with a concave notch that is recessed and cut out, and the outer peripheral surface of the throat member and the inner peripheral surface of at least one of the main body portion and the connecting pipe portion by the concave notch portion. A heat insulating space may be formed between the two.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to prevent adhesion of a powder solid raw material with a simple structure.

It is explanatory drawing for demonstrating a gasification system. It is explanatory drawing for demonstrating the specific structure of a raw material injection | throwing-in apparatus. It is explanatory drawing for demonstrating the aspect of installation of a throat member. It is explanatory drawing for demonstrating a throat member.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(Gasification system 100)
FIG. 1 is an explanatory diagram for explaining the gasification system 100. As shown in FIG. 1, the gasification system 100 includes a raw material storage unit 110, a raw material cutting unit 112, a raw material charging device 200, a gasification furnace (reaction device) 114, a boiler 130, and a heater 132. Consists of including.

  The raw material storage unit 110 is configured by a hopper or the like, and stores solid raw materials such as coal such as lignite, petroleum coke, biomass, and tire chips, which are pulverized to a powder of about 10 to 50 mm, for example. . The raw material cutting part 112 cuts out the granular solid material stored in the raw material storage part 110.

  The raw material charging apparatus 200 disperses the granular solid raw material group (a group in which the granular solid raw materials are gathered to some extent) that is cut out by the raw material cutting unit 112, and through the connecting pipe unit 202, the gasifier 114. In A specific configuration of the raw material charging apparatus 200 will be described in detail later.

  A heated fluid medium is introduced into the gasification furnace 114, and steam at about 500 ° C. is introduced from the boiler 130 through the heater 132, and a fluidized bed of the fluid medium is formed by the steam. The gasification furnace 114 performs gasification (steam gasification) of the granular solid material input from the material input device 200 in a fluidized bed at 700 ° C. to 900 ° C. to generate a gasified gas and a residue. To do.

  As described above, the granular solid raw material group cut out by the raw material cutting part 112 is charged into the gasification furnace 114 by the raw material charging device 200 and gasified. Here, when the solid raw material group is charged into the gasification furnace from the raw material charging device, the connecting pipe portion 202 may be blocked by the charged solid raw material. In addition, the solid raw material cut out by the raw material cutting part 112 includes fine powder in the granules. Therefore, there is a possibility that the powder of the solid raw material once charged in the connecting pipe portion 202 flows backward together with the water vapor from the gasification furnace 114. Then, with the condensation of water vapor, the solid raw material powder may adhere to the inside of the connecting pipe portion 202 or the raw material charging device 200.

  Therefore, in the present embodiment, with a simple configuration, the solid raw material is efficiently dispersed and charged into the connecting pipe portion 202, and backflow from the connecting pipe portion 202 is prevented, and adhesion of the solid raw material powder is prevented. An object of the present invention is to provide a raw material charging apparatus 200 capable of performing the above. Hereinafter, a specific configuration of the raw material charging apparatus 200 will be described.

(Raw material input device 200)
FIG. 2 is an explanatory diagram for explaining a specific configuration of the raw material charging apparatus 200. As shown in FIG. 2, the raw material charging device 200 includes a rotary valve 210, a first charging chute 212, a second charging chute 214, a gas introduction part 216, an injection nozzle 218, a throat member 220, and an internal pressure monitor. A unit 232, an adjustment control unit 234, and a heating unit 236 are included.

  The rotary valve (falling part) 210 serves as a boundary that separates the atmosphere of the raw material storage unit 110 from the atmosphere of the first charging chute 212, and is a granular solid raw material group A supplied from the raw material storage unit 110. (Shown in gray in FIG. 2) is dropped intermittently on the first charging chute 212. In the example shown in FIG. 2, the rotary valve 210 rotates clockwise (indicated by a broken arrow in FIG. 2) to drop the solid material group A onto the first charging chute 212.

  The first charging chute 212 has a so-called funnel shape in which the inner diameter area of the horizontal cross section decreases as it goes from vertically above to vertically below, and is made of stainless steel. As shown in FIG. 2, in the raw material charging device 200, the first charging chute 212 has a larger opening (upper opening) 212 a vertically upward and a smaller opening (lower opening) 212 b vertically. The inclined surface (inclined surface portion) 250 on the inner periphery of the first charging chute 212 is disposed so as to be positioned below the rotary valve 210 so as to be positioned below. That is, the central axis R in the dropping direction (Y-axis direction in FIG. 2) of the solid raw material group A in the rotary valve 210 and the central axis S in the vertical direction (Y-axis direction in FIG. 2) of the first charging chute 212 are They are arranged so as to be displaced in the horizontal direction (X-axis direction in FIG. 2). The angle of the inclined surface 250 in the first charging chute 212 is about 70 degrees from the horizontal plane.

  Further, the inclined surface 250 is provided with a collision surface portion 252 where the dropped solid raw material group A collides and disperses. That is, the solid raw material group A dropped from the rotary valve 210 is dispersed (spread) in the flow direction and the horizontal direction of the solid raw material group A by colliding with the collision surface portion 252 of the inclined surface 250. Then, the solid raw material group A dispersed in the collision surface portion 252 flows down by its own weight along the inclined surface 250, reaches the lower opening 212b (falling portion), and falls from the lower opening 212b to the second charging chute 214.

  The second throwing chute (main body part) 214 has a shape in which the inner diameter area of the horizontal cross section decreases from the vertically upward direction to the vertically downward direction, so-called funnel shape, and is made of stainless steel. As shown in FIG. 2, in the raw material charging device 200, the second charging chute 214 has an upper opening 214 a having a larger diameter vertically upward and a lower opening (charging port) 214 b having a smaller diameter vertically downward. The inclined surface (inclined surface portion) 260 on the inner periphery of the second charging chute 214 is disposed so as to be positioned vertically below the lower opening 212 b of the first charging chute 212. That is, the central axis S of the first charging chute 212 and the central axis T of the second charging chute 214 in the vertical direction (Y-axis direction in FIG. 2) are shifted in the horizontal direction (X-axis direction in FIG. 2). Be placed. The angle of the inclined surface 260 in the second charging chute 214 is about 70 degrees from the horizontal plane.

  Further, the inclined surface 260 is provided with a collision surface portion 262 where the solid material group A dropped from the first charging chute 212 collides and disperses. That is, like the dispersion of the solid raw material group A by the collision surface portion 252 in the first charging chute 212, the solid raw material group A that has dropped from the first charging chute 212 collides with the collision surface portion 262 of the inclined surface 260, so Further distributed in the flow direction and horizontal direction of the raw material group A. Then, the solid raw material group A dispersed in the collision surface portion 262 flows down by its own weight along the inclined surface 260, reaches the lower opening 214b, and enters the gasifier 114 from the lower opening 214b through the connecting pipe portion 202. Is done. In other words, the lower opening 214b guides the solid raw material group A that has flowed down from the collision surface portion 262 along the inclined surface 260 to its gasifier 114 side.

  As described above, the solid raw material group A is dropped toward the inclined surfaces 250 and 260, and the solid raw material group A collides with the collision surface portions 252 and 262, so that the solid raw material group A can be easily dispersed. .

  The gas introduction unit 216 introduces gas into the chutes 212 and 214 from the upper portion 212c of the first throwing chute 212 and the upper portion 214c of the second throwing chute 214 in response to a control command from the adjustment control unit 234 described later. Here, the gas introduced by the gas introduction unit 216 is an atmosphere gas (here, water vapor) of the gasification furnace 114 or an inert gas (nitrogen, argon, or the like).

  When the gas introduction unit 216 introduces gas, a gas flow from the raw material charging apparatus 200 to the gasification furnace 114 can be created. As a result, it is possible to prevent the back flow of the powdered solid raw material and to smoothly introduce the solid raw material group A into the connecting pipe portion 202.

  The ejection nozzle 218 ejects fluid at a speed of about sonic speed (340 m / sec) toward the throat member 220 described later with an ejection amount in accordance with a control command from the adjustment control unit 234. Here, the fluid ejected by the ejection nozzle 218 is the atmospheric gas of the gasification furnace 114 or an inert gas.

  Thus, by injecting the fluid toward the lower opening 214b at a speed of about the speed of sound, the solid raw material group A can be reliably pushed (injected) into the connecting pipe portion 202, and the solid raw material in the connecting pipe portion 202 is Blockage by group A can be prevented. Further, since the back flow of the powder solid raw material and the water vapor from the connecting pipe portion 202 can be suppressed, the water vapor and the powder solid raw material adhere to the inner circumferences of the first charging chute 212 and the second charging chute 214 due to the reverse flow. The situation can be reduced.

  In addition, when the gasification furnace is an atmosphere containing oxygen, a large amount of air can be introduced to prevent clogging or backflow due to the solid raw material group in the connection pipe, but the gasification furnace 114 according to the present embodiment In the case of an atmosphere that does not contain oxygen, such as a water vapor atmosphere, air cannot be introduced. Therefore, it is conceivable to introduce a large amount of water vapor or inert gas from the raw material input device 200 to the connecting pipe portion 202. However, the cost is increased, and the powdered solid raw material is the first input chute 212 or the second input chute 214. It may adhere to the inner peripheral surface.

  Therefore, the jet nozzle 218 jets the fluid at a high speed such as sound speed, so that the blockage by the solid raw material group A and the back flow of the powdered solid raw material can be suppressed with a small amount of fluid, and the cost can be reduced. It becomes possible.

(Throat member 220)
The throat member 220 includes an inner peripheral surface of a portion continuous with the lower opening 214b (input port) in the second charging chute 214 (main body portion), an inner peripheral surface of the lower opening 214b, and a lower opening in the connecting pipe portion 202. 214b is a tubular member that covers the inner peripheral surface of the portion that is continuous with 214b and is capable of flowing the fluid injected from the solid raw material group A and the injection nozzle 218, and can be vibrated by the fluid injected from the injection nozzle 218. It has been. Specifically, the throat member 220 is formed of a stainless steel member such as a tubular SUS, and the solid raw material group A falling from the lower opening 214b and the fluid injected from the injection nozzle 218 are supplied to the lower opening 214b, the gasification furnace 114, and the like. Is guided to the connecting pipe portion 202 for connecting the.

  FIG. 3 is an explanatory diagram for explaining an installation mode of the throat member 220, and FIG. 4 is an explanatory diagram for explaining the throat member 220. As shown in FIG. 3, when the throat member 220 is installed on the second charging chute 214, the fluid injection direction 218a (FIG. 3, FIG. 4, the main body side covering portion 222 disposed on the upstream side) (indicated by a white arrow) and the main body side covering portion 222, and the connecting pipe portion 202 side (injection direction 218 a from the lower opening 214 b). And a connecting pipe side covering portion 224 arranged on the downstream side).

  Further, as shown in FIG. 4, the main body side covering portion 222 has an outer peripheral surface 222a that covers the inner peripheral surface of the lower opening 214b and a part of the inner peripheral surface 214d of the second throwing chute 214. The covering portion 224 covers the inner peripheral surface 202a of the connecting pipe portion 202 with the outer peripheral surface 224a. In other words, as a whole outer peripheral surface of the throat member 220, a part of the inner peripheral surface 214d of the second charging chute 214, an inner peripheral surface of the lower opening 214b, and a part of the inner peripheral surface 202a of the connecting pipe portion 202 are formed. It will cover.

  Further, the outer diameter of the main body side covering portion 222 is formed larger than the diameter of the lower opening 214b. Specifically, in the present embodiment, the outer diameter of the upper end of the main body side covering portion 222 is larger than the diameter of the lower opening 214b, and the horizontal side of the main body side covering portion 222 (in the X-axis direction in FIG. 4). ) The outer diameter area of the cross section is formed so as to gradually decrease from the upper end to the lower end.

  Thus, the main body side covering portion 222 is hooked on the inner peripheral surface 214d of the second charging chute 214 by its own weight only by inserting the throat member 220 into the second charging chute 214 from above. That is, the throat member 220 is not fixed to the second throwing chute 214 or the connecting pipe portion 202, but is only hooked on the inner peripheral surface 214 d of the second throwing chute 214. Therefore, when the fluid ejected by the ejection nozzle 218 collides with the main body side covering portion 222, the throat member 220 can be vibrated by this collision.

  Further, in the throat member 220, the main body side covering portion 222 is dimensioned so that the outer peripheral surface 222a and the inner peripheral surface 214d of the second charging chute 214 are in close contact, that is, the clearance is substantially 0 mm. Formed in a relationship. On the other hand, the connecting tube side covering portion 224 is formed in a dimensional relationship such that the clearance between the outer peripheral surface 224a and the inner peripheral surface 202a of the connecting tube portion 202 is 0.05 mm to 0.2 mm. .

  Therefore, when the fluid jetted on the inner peripheral surface 222a of the main body side covering portion 222 collides, the connecting pipe side covering portion 224 vibrates in the horizontal direction (X-axis direction in FIG. 4). Note that the vibration at this time is a minute vibration having a frequency of about 10 Hz.

  Further, as shown in FIG. 4, the space in the main body side covering portion 222 gradually narrows from the upstream side to the downstream side in the injection direction 218a, and the space in the connecting pipe side covering portion 224 becomes the main body side. The distance from the connecting portion to the covering portion 222 is constant to a predetermined distance, and is configured to gradually widen beyond the predetermined distance. In other words, the internal space of the throat member 220 is configured in a funnel shape.

  More specifically, the inner diameter area of the horizontal (X axis direction in FIG. 4) cross section of the main body side covering portion 222 gradually decreases from the upper end to the lower end, and the horizontal (X in FIG. 4) of the connecting pipe side covering portion 224 is reduced. The inner diameter area of the cross section in the (direction) direction is a predetermined distance from the upper end (the connection portion between the main body side covering portion 222 and the connecting pipe side covering portion 224, that is, substantially equal to the lower end of the main body side covering portion 222). And is formed so as to gradually increase from the predetermined distance toward the lower end. In this throat member 220, a region from the connecting portion between the main body side covering portion 222 and the connecting pipe side covering portion 224 to a predetermined distance becomes a flow port from the second charging chute 214 to the connecting tube portion 202.

  In this manner, the space in the main body side covering portion 222 is gradually narrowed from the upstream side to the downstream side in the injection direction 218a, that is, widened toward the injection nozzle 218, whereby the injection from the injection nozzle 218 is performed. The area in which the fluid to be collided with the inner periphery of the main body side covering portion 222 can be increased, and the vibration efficiency of the throat member 220 due to the collision of the fluid can be improved.

  In this way, the injection nozzle necessary for pushing the solid raw material group A with a simple configuration in which the throat member 220 is not fixed to the second charging chute 214 or the connecting pipe portion 202 but is hooked on the second charging chute 214. The throat member 220 can be reliably vibrated using the ejection of fluid by 218. Therefore, it is possible to prevent the powdery solid raw material from adhering in the vicinity of the throat member 220, and the flow of the solid raw material group A can be promoted.

  Further, the throat member 220 may be worn by collision with the fluid ejected by the ejection nozzle 218, but in this embodiment, the throat member 220 is only latched on the second charging chute 214. The throat member 220 can be easily replaced.

  Further, as shown in FIG. 4, the outer surface of the throat member 220 (here, the outer surface 222a of the main body side covering part 222 and the outer surface 224a of the connecting pipe side covering part 224) is recessed and notched. Is formed between the inner peripheral surface 214 d of the second throwing chute 214, the inner peripheral surface 202 a of the connecting pipe portion 202, and the outer peripheral surface of the throat member 220. A space B is formed. The space B is filled with air, and this air forms a heat insulation space. The heat insulation space formed in this way can avoid the throat member 220 from being allowed to cool. Thereby, even if water vapor flows backward from the connecting pipe portion 202, condensation of the water vapor can be prevented, and adhesion of the powder solid raw material in the vicinity of the throat member 220 can be prevented.

  The internal pressure monitoring unit 232 monitors the internal pressure of the second charging chute 214. The adjustment control unit 234 determines the amount of gas introduced into the input chute by the gas introduction unit 216 so that the monitored internal pressure falls within a predetermined range (for example, a pressure range lower by about 0 to 10 kPa than the pressure of the gasification furnace 114). The amount of fluid ejected by the ejection nozzle 218 is adjusted. Specifically, the adjustment control unit 234 increases the gas introduction amount by the gas introduction unit 216 or reduces the fluid injection amount by the injection nozzle 218 when the monitored internal pressure is likely to fall below a predetermined range.

  The adjustment control unit 234 controls the gas introduction unit 216 and the injection nozzle 218 based on the internal pressure of the second charging chute 214 (and the internal pressure of the first charging chute 212), and the first charging chute 212 and the second charging chute 214 are controlled. By keeping the internal pressure within a predetermined range, it is possible to avoid a situation in which the first charging chute 212 and the second charging chute 214 become too negative. As a result, it is possible to avoid a situation in which air enters the first charging chute 212 and the second charging chute 214 from the outside (atmosphere). In addition, since it is not necessary to increase the pressure resistance of the first charging chute 212 and the second charging chute 214, it is possible to reduce the cost.

  The heating unit 236 is configured by a steam trace or the like, and is wound and installed so as to be in contact with the outer peripheral surfaces of the first charging chute 212 and the second charging chute 214. In the present embodiment, steam at about 170 ° C. is introduced from the boiler 130 into the heating unit 236. When the heating unit 236 heats the first charging chute 212 and the second charging chute 214, even if water vapor flows backward from the connecting pipe unit 202, condensation of the water vapor can be prevented.

  As described above, according to the raw material charging apparatus 200 according to the present embodiment, the throat member 220 is hooked on the second charging chute 214 and the fluid sprayed by the spray nozzle 218 is caused to collide with the throat member 220. With a simple configuration, the throat member 220 can be reliably vibrated. That is, since the injection nozzle 218 necessary for pushing the solid raw material group A is used for the vibration of the throat member 220, it is not necessary to separately provide a dedicated vibration device for vibrating the throat member 220. Therefore, it is possible to avoid a situation in which the solid raw material powder adheres to the inner periphery of the throat member 220 with a simple configuration and without increasing the cost.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Is done.

  For example, in the throat member 220 described above, an example in which the recess 220a is formed on both the outer peripheral surface 222a of the main body side covering portion 222 and the outer peripheral surface 224a of the connecting pipe side covering portion 224 has been described. . However, the recess 220a may be formed on either the outer peripheral surface 222a of the main body side covering portion 222 or the outer peripheral surface 224a of the connecting pipe side covering portion 224.

  Moreover, in embodiment mentioned above, air was filled in the space B formed by the recessed part 220a, and the example in which heat insulation space was formed with this air was demonstrated. However, the heat insulation space may be formed by filling the space B with a fluid other than air or a solid.

  Furthermore, in the above-described embodiment, an example in which the throat member 220 is configured separately from the second charging chute 214 has been described. However, if the throat member 220 has a structure that can be vibrated by the fluid ejected by the ejection nozzle 218, the throat member 220 is configured as the second throat member 220. The charging chute 214 may be integrated. For example, a configuration in which a part of the throat member 220 is connected to the second charging chute 214 may be used.

  In addition, since the raw material charging apparatus 200 has two charging chutes in the vertical direction, the solid raw material group A dropped by the rotary valve 210 collides with the collision surface portions 252 and 262, but the solid raw material group A is sufficiently dispersed. If possible, it is sufficient to collide with the collision surface at least once.

  Further, by polishing the inner surfaces of the first charging chute 212 and the second charging chute 214, it is possible to further prevent the powder solid material from adhering.

  In the above-described embodiment, the configuration in which the raw material charging apparatus 200 inputs the solid raw material into the fluidized bed type gasification furnace 114 has been described as an example, but a moving bed type gasification furnace may be used. In addition to a gasification furnace, a combustion furnace, an incinerator, or the like may be used as long as it is a reaction apparatus that reacts a solid raw material.

  The present invention can be used for a raw material charging apparatus for charging a raw material into a reaction apparatus such as a gasification furnace.

A ... Solid raw material group 110 ... Raw material storage part 114 ... Gasification furnace (reactor)
200 ... Raw material charging device 202 ... Connecting pipe part 214 ... Second charging chute (main body part)
214b ... lower opening (inlet)
218 ... Injection nozzle 220 ... Throat member 222 ... Main body side covering part 224 ... Connection pipe side covering part 220a ... Recessed part

Claims (5)

A raw material charging device disposed between a raw material storage unit for storing a solid raw material and a reaction device for reacting the solid raw material,
The main body,
An inlet that is provided in the main body part and guides the granular solid raw material group supplied from the raw material storage part to the reactor side;
An injection nozzle for injecting fluid toward the charging port;
A tubular throat member that covers a part of the inner peripheral surface of the main body and the inner peripheral surface of the charging port, and is capable of flowing the fluid injected from the solid raw material group and the injection nozzle;
With
The throat member is provided so as to be able to vibrate by a fluid ejected from the ejection nozzle. A connecting pipe part for connecting the charging port and the reaction apparatus;
The throat member is
A main body side covering portion that covers an inner peripheral surface of the main body portion that is located on the upstream side of the injection direction of the fluid from the injection nozzle from the input port;
A connecting pipe side covering portion that is continuous with the main body side covering portion and covers an inner peripheral surface of the connecting pipe portion that is located downstream of the injection port in the injection direction;
The said main body side covering part is comprised by the shape where the space in the said main body side covering part becomes narrow gradually as it goes to the downstream from the upstream of the said injection direction. Raw material input device.   The connecting pipe side covering portion is formed in a dimensional relationship such that a clearance between the outer peripheral surface of the connecting pipe side covering portion and the inner peripheral surface of the connecting pipe portion is 0.05 mm to 0.2 mm. The raw material charging apparatus according to claim 2, wherein The main body is provided vertically above the connecting pipe,
The spray nozzle sprays fluid from vertically upward to vertically downward;
The outer diameter of the main body side covering portion is formed larger than the diameter of the input port, and the main body side covering portion is hooked on the main body portion. The raw material charging apparatus described.   The outer peripheral surface of the throat member is formed with a concave notch that is recessed and cut out, and the outer surface of the throat member, at least one of the main body portion and the connecting pipe portion is formed by the concave notch portion. 5. The raw material charging apparatus according to claim 2, wherein a heat insulating space is formed between the inner peripheral surface of the raw material.