JP2015044933A - Gasification gas generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a fluid medium introduced into a gasification furnace from overheating, even when a gasification raw material to produce more residues than expected due to gasification is loaded into the furnace.SOLUTION: A gasification gas generation system 100 includes a combustion furnace 120 to heat a fluid medium and a gasification furnace 150 in which the fluid medium heated in the combustion furnace is introduced and a gasification raw material is gasified by the heat of the fluid medium to produce a gasification gas. The fluid medium circulates between the combustion furnace and the gasification furnace. The fluid medium and residues of the gasification raw material are introduced into the combustion furnace from the gasification furnace. The combustion furnace heats the fluid medium by burning the residues and is equipped with a cooling mechanism 210 that takes the heated fluid medium out of the combustion furnace and returns it to the combustion furnace after cooling.

Description

  The present invention relates to a gasification gas generation system that generates gasification gas by gasifying a gasification raw material.

  Coal is a natural resource that can be stably supplied over a long period because it has a recoverable life of about 150 years, which is more than three times that of oil, and because the reserves are not unevenly distributed compared to oil. As expected. Coal is classified into anthracite, semi-anthracite, bituminous coal, sub-bituminous coal, and lignite in descending order of carbonization. Anthracite and semi-anthracite are the raw materials for reducing agents and activated carbon in blast furnaces. It is used as. On the other hand, lignite has a higher volatile content per unit weight than other coals (anthracite, semi-anthracite, bituminous coal, subbituminous coal), but its calorific value per unit weight is small. Although it is difficult to use, since it accounts for half of the world's coal reserves, the development of technology that effectively uses lignite is desired.

  Therefore, a gasification (steam gasification) technology has been developed to gasify gasification raw materials such as coal, biomass and tire chips such as lignite in a gasification furnace in which a fluidized medium forms a fluidized bed with steam at about 800 ° C. (For example, Patent Document 1). As described above, since lignite has a larger volatile content than other coals, gasification gas can be generated more efficiently than other coals by using the technique of Patent Document 1. The gasified gas thus produced can be used for power generation systems, hydrogen production, synthetic fuel (synthetic petroleum) production, chemical fertilizer (urea) and other chemical products.

  The technique of Patent Document 1 is configured to include a combustion furnace and a gasification furnace, and after introducing the fluidized medium heated in the combustion furnace into the gasification furnace and performing gasification of the gasification raw material in the gasification furnace, The fluid medium circulates between the combustion furnace and the gasification furnace so that the fluid medium is introduced from the gasification furnace to the combustion furnace. In the technique of Patent Document 1, the residue (char) of the gasified raw material after gasification is introduced into the combustion furnace together with the fluidized medium, and the fluidized medium is heated by burning the residue in the combustion furnace.

Japanese Patent No. 3933105

  As described above, since gasification gas can be efficiently generated when lignite is used as a gasification raw material, gasification gas generators are attracting attention as a technology for effectively using lignite, and it is assumed that lignite is mainly used. A gasification gas generator designed in this way has been developed. As described above, in a gasification gas generation apparatus designed on the assumption that lignite is used as a raw material, if another raw material is used as a gasification raw material, the combustion furnace or the gasification furnace may be overheated.

  More specifically, in the gasified gas generator in which the fluid medium circulates described in Patent Document 1 described above, the fuel of the combustion furnace is a residue of the gasified raw material. That is, the heating amount of the fluidized medium in the combustion furnace of the gasification gas generator designed with the utilization of lignite is the calorific value obtained by burning the residue of lignite. Therefore, the gasification gas production | generation apparatus for lignite will be designed so that a combustion furnace and a gasification furnace may become suitable temperature with the residue of lignite.

  However, for example, when bituminous coal, which has a higher degree of carbonization than lignite, is used as a raw material for the gasification gas generator designed for the use of lignite, the bituminous coal has less volatile content than lignite, and gasification Since there is little gasification gas obtained in a furnace, the quantity of the residue introduced into a combustion furnace increases compared with lignite. Therefore, the calorific value in the combustion furnace becomes large, and the heating amount of the fluidized medium in the combustion furnace becomes too large (the combustion furnace is overheated). If it does so, there exists a possibility that a fluidized medium may melt | dissolve and it may stop functioning as a fluidized medium, or a gasification furnace may also be overheated by the heated fluid medium, and an appropriate gasification temperature may not be maintained. In addition, if the temperature of the fluidized medium is too high, it is necessary to increase the heat resistance strength of the combustion furnace, the duct connecting the combustion furnace and the gasification furnace, the gasification furnace, etc., resulting in high costs.

  In view of such a problem, the present invention provides a gas that can prevent overheating of a fluidized medium introduced into a gasification furnace even when a gasification raw material in which a residue due to gasification is larger than expected is introduced. It aims to provide a gasification gas generation system.

  In order to solve the above problems, a gasified gas generation system of the present invention includes a combustion furnace that heats a fluidized medium, a fluidized medium heated by the combustion furnace, and gasified raw material that is heated by the heat of the fluidized medium. And a fluidizing medium is circulated between the combustion furnace and the gasification furnace, and the combustion furnace is supplied with the fluidizing medium and the gasification raw material from the gasification furnace. The residue is introduced, and the combustion furnace further includes a cooling mechanism that burns the residue to heat the fluidized medium, takes out the heated fluidized medium from the combustion furnace, cools it, and returns it to the combustion furnace. .

  Further, the cooling mechanism introduces the fluid medium and the combustion exhaust gas heated in the combustion furnace, and returns the fluid medium separated by the first cyclone to the combustion furnace. Selected from the group consisting of a return pipe, a first loop seal disposed in the return pipe and preventing the backflow of the combustion exhaust gas generated in the combustion furnace to the first cyclone, and the first cyclone, the return pipe, and the first loop seal. In addition, one or a plurality of cooling units that cool the fluid medium may be included.

  In order to solve the above-mentioned problems, another gasified gas generation system of the present invention includes a combustion furnace for heating a fluidized medium, a fluidized medium heated by the combustion furnace, and gasified raw material using heat of the fluidized medium. A gasification furnace for generating a gasification gas, wherein the fluidizing medium circulates between the combustion furnace and the gasification furnace, and the combustion furnace is supplied with the fluidizing medium and gasification from the gasification furnace. Residue of the raw material is introduced, the combustion furnace burns the residue to heat the fluidized medium, and cools the fluidized medium in the path from the combustion furnace to the gasification furnace in the circulation path of the fluidized medium. And.

  A second cyclone that introduces the fluid medium and the combustion exhaust gas heated in the combustion furnace and separates the fluid medium and the combustion exhaust gas; and a delivery pipe that delivers the fluid medium separated by the second cyclone to the gasification furnace; A second loop seal that is disposed in the delivery pipe and prevents the backflow of gasified gas generated in the gasification furnace to the second cyclone, and the cooling unit includes the second cyclone, the delivery pipe, and the second loop. The fluidized medium may be cooled in a path from the combustion furnace to the gasification furnace in the circulation path by cooling the fluidized medium in one or more selected from the group of seals.

  Moreover, a cooling part may produce | generate water vapor | steam while cooling a fluid medium by heat-exchanging between water and a fluid medium. Further, the gasification raw material may be bituminous coal.

  According to the present invention, it is possible to prevent overheating of the fluidized medium introduced into the gasification furnace, even if a gasification raw material with more residue than expected is introduced.

It is a figure for demonstrating the specific structure of the gasification gas production | generation system concerning 1st Embodiment. It is a figure for demonstrating the specific structure of a cooling unit. It is a figure for demonstrating the specific structure of the gasification gas production | generation system concerning 2nd Embodiment.

  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.

(First embodiment: gasification gas generation system 100)
FIG. 1 is a diagram for explaining a specific configuration of a gasification gas generation system 100 according to the first embodiment. As shown in FIG. 1, the gasified gas generation system 100 includes a gasified gas generation device 110, a cooling mechanism 210, and a generator 310, and the gasification gas generation device 110 includes a combustion furnace 120, and , A cyclone 130 (second cyclone), a delivery pipe 140, a gasification furnace 150, and a delivery pipe 160, and the cooling mechanism 210 includes a cyclone 220 (first cyclone), a return pipe 230, The cooling unit 240 is included.

  In the present embodiment, the gasification gas generation system 100 is a circulating fluidized bed gasification system, and as a whole, circulates using a fluid medium composed of sand such as silica sand having a particle size of about 300 μm as a heat medium. I am letting. In the present embodiment, the circulation path through which the fluid medium circulates is a main circulation path that circulates through the combustion furnace 120, the cyclone 130, the delivery pipe 140, the gasification furnace 150, and the delivery pipe 160 that constitute the gasification gas generator 110. And a cooling circulation path that circulates through the combustion furnace 120, the cyclone 220, and the return pipe 230.

  The gasified gas generator 110 constituting the main circulation path (circulation path) will be described. Specifically, first, the fluidized medium is heated to about 900 ° C. to 1000 ° C. in the combustion furnace 120, and the cyclone 130 together with the combustion exhaust gas. To be introduced. In the cyclone 130, the combustion exhaust gas and the high-temperature fluid medium are separated, and the separated combustion exhaust gas is heat-recovered by a heat exchanger (for example, a boiler) not shown.

  On the other hand, the high-temperature fluid medium separated by the cyclone 130 is introduced into the gasification furnace 150 through the delivery pipe 140. The delivery pipe 140 is provided with an inlet loop seal 142 (second loop seal). The inlet loop seal 142 has a fluidized bed formed therein, and plays a role of preventing inflow of combustion exhaust gas from the cyclone 130 to the gasification furnace 150 and backflow of gasification gas from the gasification furnace 150 to the cyclone 130. .

  The fluid medium introduced from the cyclone 130 to the gasification furnace 150 through the delivery pipe 140 flows by being bubbled by a gasifying agent (here, steam) introduced from the steam distributor 152, and the delivery pipe 160. Is returned to the combustion furnace 120. An outlet loop seal 162 is disposed on the delivery pipe 160. The outlet loop seal 162 has a fluidized bed formed therein, and serves to prevent the outflow of gasification gas from the gasification furnace 150 to the combustion furnace 120 and the backflow of gas from the combustion furnace 120 to the gasification furnace 150. Bear.

  Thus, in the main circulation path, the fluid medium moves through the combustion furnace 120, the cyclone 130, the delivery pipe 140, the gasification furnace 150, and the delivery pipe 160 in this order, and is introduced into the combustion furnace 120 again. These will be circulated.

  In addition, a water vapor distribution unit 152 is provided below the gasification furnace 150, and water vapor supplied from a water vapor supply source (not shown) passes through the water vapor distribution unit 152 from the bottom surface of the gasification furnace 150. It is introduced into the gasification furnace 150. Thus, by introducing water vapor into the high-temperature fluid medium introduced from the cyclone 130, the fluid medium is fluidized and a fluidized bed (bubble fluidized bed) is formed in the gasification furnace 150.

  In the gasification furnace 150, coal such as lignite, gasification raw materials (solid raw materials) such as biomass and tire chips are introduced, and the introduced gasification raw materials are heated by about 800 ° C. to 900 ° C. of the fluidized medium. It is gasified, and thereby gasified gas (syngas) is generated.

  In the gasification gas generator 110 in which such a fluid medium circulates between the combustion furnace 120 and the gasification furnace 150, the residue remaining after the gasification raw material is gasified in the gasification furnace 150 is introduced into the combustion furnace 120. The Therefore, the residue introduced from the gasification furnace 150 to the combustion furnace 120 becomes a fuel (heat source) in the combustion furnace 120, and in the combustion furnace 120, the fluid medium is heated by the heat generated by burning the residue. Become. That is, the heating amount of the fluid medium in the combustion furnace 120 is a calorific value obtained by burning the residue.

  Here, since lignite has a larger volatile content than other coals and is porous, when lignite is introduced into the gasification furnace 150 of the gasification gas generator 110 as a gasification raw material, gas efficiently. A gas can be generated. For this reason, it is possible to design the gasification gas production | generation apparatus 110 for lignite.

  When designing the gasification gas generator 110 assuming the use of lignite, the structure of the combustion furnace 120 and the combustion furnace are set so that the combustion furnace 120 and the gasification furnace 150 have an appropriate temperature due to the residue of the lignite. The flow rate of air (or oxygen) introduced into 120, the total amount of the fluid medium, the structure of the gasification furnace 150, the flow rate of water vapor introduced into the gasification furnace 150, and the like are designed.

  In this way, when, for example, bituminous coal having less volatile content than lignite is introduced as a gasification raw material into the gasification gas generator 110 designed on the assumption of the use of lignite, it is obtained in the gasification furnace 150. Since there is little gasification gas, the quantity of the residue introduce | transduced into the combustion furnace 120 increases compared with lignite. In this case, the amount of heat generated in the combustion furnace 120 may increase, and the amount of heating of the fluid medium in the combustion furnace 120 may increase too much (the combustion furnace 120 may be overheated).

  The inventors of the present application, for example, introduce a bituminous coal into the gasification gas generator 110 that is designed assuming the use of lignite under certain setting conditions, and the temperature of the fluid medium in the combustion furnace 120 increases by about 100 ° C. It was found that the flow rate of air introduced into the combustion furnace 120 is about 3 to 4 times and the flow rate of water vapor introduced into the gasification furnace 150 is about 4 times.

  Therefore, in the gasified gas generation system 100 according to the present embodiment, the cooling mechanism 210 is provided, the fluidized medium is taken out from the combustion furnace 120, cooled, and then returned to the combustion furnace 120 to be introduced into the gasification furnace 150. Prevent overheating of the fluid medium.

  The cooling mechanism 210 that constitutes the cooling circulation path will be described. The fluid medium is heated to about 900 ° C. to 1000 ° C. in the combustion furnace 120, and the cyclone passes through the exhaust port different from the exhaust port to which the cyclone 130 is connected together with the combustion exhaust gas. 220. In the cyclone 220, the combustion exhaust gas and the high-temperature fluid medium are separated, and the separated combustion exhaust gas is heat-recovered by a heat exchanger (for example, a boiler) not shown.

  On the other hand, the high-temperature fluid medium separated by the cyclone 220 is reintroduced (returned) to the combustion furnace 120 via the return pipe 230. A first loop seal 232 is disposed on the return pipe 230. The first loop seal 232 plays a role of preventing inflow of combustion exhaust gas from the cyclone 220 to the combustion furnace 120 and backflow of combustion exhaust gas from the combustion furnace 120 to the cyclone 220.

  Thus, in the cooling circulation path, the fluid medium moves through the combustion furnace 120, the cyclone 220, and the return pipe 230 in this order and is re-introduced into the combustion furnace 120, thereby circulating them. That is, the fluid medium circulates in parallel between the main circulation path and the cooling circulation path.

  The cooling unit 240 includes a flow pipe 242 and a pump 244, and cools the fluid medium in the first loop seal 232.

  FIG. 2 is a diagram for explaining a specific configuration of the cooling unit 240 according to the present embodiment. As shown in FIG. 2, the first loop seal 232 of the present embodiment is provided with an air distributor 234 in the lower part, and air supplied from an air supply source (not shown) passes through the air distributor 234. The main body 236 is introduced into the main body 236 from the bottom surface of the main body 236 provided above the first loop seal 232.

  Thus, by introducing air into the fluid medium introduced from the cyclone 220 via the inlet 232a of the first loop seal 232, a fluidized bed (bubble fluidized bed) in the first loop seal 232 (main body 236). Is formed. Then, when the vertical position of the fluidized bed becomes higher due to the introduction of the further fluid medium from the cyclone 220, the fluid medium overflows the outlet 232 b of the first loop seal 232 and is reintroduced into the combustion furnace 120. Become.

  One end of the flow pipe 242 constituting the cooling unit 240 is connected to the pump 244 and the other end is connected to the generator 310. A part 242 a of the flow pipe 242 is disposed in the main body 236 of the first loop seal 232.

  The pump 244 introduces water into the flow pipe 242. When water is introduced into the flow pipe 242 by the pump 244, when the water passes through the first loop seal 232, heat exchange is performed between the fluid medium and the water, the fluid medium is cooled, and the water is heated. It becomes water vapor.

  With the configuration including the cooling mechanism 210, the heated fluid medium can be taken out from the combustion furnace 120 and cooled (heat removal) and then returned to the combustion furnace 120. Thereby, even if it introduces bituminous coal to the gasification gas production | generation apparatus 110 designed supposing the utilization of lignite, overheating of the fluid medium in the combustion furnace 120 can be suppressed, and the temperature of the fluid medium in the combustion furnace 120 Can be maintained properly. Therefore, overheating of the fluidized medium introduced into the gasification furnace 150 can be prevented.

  Further, since the first loop seal 232 needs to form a fluidized bed therein, a certain volume must be ensured, and the installation volume of the flow pipe 242 can be relatively large. Therefore, the cooling unit 240 cools the fluid medium in the first loop seal 232, so that the fluid medium can be efficiently cooled.

  Moreover, in this embodiment, the water vapor | steam produced | generated in the part 242a of the flow pipe 242 distribute | arranged to the 1st loop seal 232 is introduce | transduced into the generator 310 provided with the steam turbine. Thereby, it is possible to generate power with the thermal energy recovered by cooling the fluid medium, and to effectively use the thermal energy.

  Here, the total amount of the fluid medium that circulates in the gasification gas generation system 100 will be described. The amount of the fluid medium that circulates in the main circulation path is the flow of the gasification gas generator 110 designed on the assumption that lignite is used. Substantially equal to the medium. In addition, the fluid medium flowing through the cooling circulation path is an amount necessary for cooling the difference between the calorific value generated in the combustion furnace 120 by the residue of lignite and the calorific value generated in the combustion furnace 120 by the residue of bituminous coal.

  That is, the total amount of the fluid medium in the gasification gas generation system 100 is larger than the total amount of the fluid medium in the gasification gas generation device 110.

  In addition, a partition plate may be provided at the inlet of the cyclones 130 and 220 so that the fluid medium introduced from the combustion furnace 120 to the cyclone 130 and the fluid medium introduced to the cyclone 220 are distributed as described above. The channel cross-sectional area of the inlets of the cyclones 130 and 220 is designed by devising the shape of the inlet.

  As described above, according to the gasified gas generation system 100 according to the present embodiment, it is possible to prevent overheating of the fluidized medium introduced into the gasification furnace 150.

(Second Embodiment: Gasified Gas Generation System 400)
In the first embodiment, the cooling mechanism 210 takes out the heated fluid medium from the combustion furnace 120 and cools it, and then returns it to the combustion furnace 120, thereby overheating the fluid medium introduced into the gasification furnace 150. The configuration to prevent has been described. However, even if the cyclone 220, the return pipe 230, and the first loop seal 232 are not provided, overheating of the fluidized medium introduced into the gasification furnace 150 can be prevented.

  FIG. 3 is a diagram for explaining a gasification gas generation system 400 according to the second embodiment. As shown in FIG. 3, the gasified gas generation system 400 includes a gasified gas generation device 110, a cooling unit 410, and a generator 310. Note that each component constituting the gasification gas generation device 110 is substantially the same as the component of the gasification gas generation device 110 described in the first embodiment, and therefore the same reference numerals are used for description. Is omitted.

  In the present embodiment, the cooling unit 410 includes a flow pipe 412 and a pump 414, and cools the fluid medium that flows through the inlet loop seal 142. Specifically, the flow pipe 412 constituting the cooling unit 410 has one end connected to the pump 414 and the other end connected to the generator 310. A part of the flow pipe 412 is disposed in the inlet loop seal 142. The pump 414 introduces water into the flow pipe 412. When water is introduced into the flow pipe 412 by the pump 414, when the water passes through the inlet loop seal 142, heat exchange is performed between the fluid medium and water, the fluid medium is cooled, and the water is heated. It becomes water vapor.

  With the configuration including the cooling unit 410, the fluid medium flowing through the inlet loop seal 142 can be cooled (heat removal). Thereby, even if bituminous coal is introduced into the gasification gas generator 110 designed on the assumption that lignite is used, overheating of the fluidized medium introduced into the gasification furnace 150 can be prevented.

  Further, since the inlet loop seal 142 needs to form a fluidized bed therein, a certain amount of volume must be ensured, and the installation volume of the flow pipe 412 can be relatively large. Therefore, the cooling unit 410 cools the fluid medium in the inlet loop seal 142, so that the fluid medium can be efficiently cooled.

  Moreover, in this embodiment, the water vapor | steam produced | generated in a part of distribution pipe 412 distribute | arranged to the inlet loop seal 142 is introduce | transduced into the generator 310 provided with the steam turbine. Thereby, the thermal energy recovered by cooling the fluid medium can be used effectively.

  As described above, according to the gasified gas generation system 400 according to the present embodiment, it is possible to prevent overheating of the fluidized medium introduced into the gasification furnace 150.

  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 first embodiment described above, the cooling unit 240 cools the fluid medium that circulates through the first loop seal 232. If the fluid medium that circulates through the cooling circulation path can be cooled, it circulates through other locations. The flowing fluid medium may be cooled. For example, the cooling unit 240 may cool the combustion furnace 120 itself, the cyclone 220 itself, and the return pipe 230 itself.

  In the second embodiment described above, the cooling unit 410 cools the fluid medium flowing through the inlet loop seal 142, so that the fluid medium in the path from the combustion furnace 120 to the gasification furnace 150 in the main circulation path. However, as long as the fluid medium can be cooled in the path from the combustion furnace 120 to the gasification furnace 150, the cooling unit 410 may cool the fluid medium flowing through other locations. For example, the cooling unit 410 may cool the fluid medium flowing between the combustion furnace 120 and the gasification furnace 150 by cooling the cyclone 130 itself and the delivery pipe 140 itself.

  Further, the number of cooling units 240 and 410 is not limited, and may be one or plural.

  In the first and second embodiments described above, the cooling units 240 and 410 including the flow pipes 242 and 412 and the pumps 244 and 414 have been described. However, the cooling units 240 and 410 need only be able to cool the fluid medium and generate water vapor by exchanging heat between the fluid and the fluid medium. For example, natural cooling boilers (drums) that do not require the pumps 244 and 414 are required. Boiler).

  In the first and second embodiments described above, the cooling units 240 and 410 have described the configuration in which water and the fluid medium are heat-exchanged to cool the fluid medium and generate water vapor. There is no need to generate water vapor, as long as the fluid medium can be cooled.

  In the first and second embodiments described above, the cooling units 240 and 410 have described the configuration for cooling the fluid medium by exchanging heat between the water and the fluid medium, but if the fluid medium can be cooled, The configuration of the cooling units 240 and 410 is not limited, and may be an air cooling device using air as a heat medium, for example.

  Further, in the first and second embodiments described above, the case where the steam generated by the cooling units 240 and 410 cooling the fluidized medium is used by the generator 310 to generate electric power has been described. However, the water vapor generated by the cooling units 240 and 410 cooling the fluidized medium may be introduced into the water vapor distribution unit 152 of the gasification furnace 150, or the inlet loop seal 142 or the like to form a fluidized bed. It may be introduced into the outlet loop seal 162.

  In the first and second embodiments described above, the gasification gas generator 110 is designed assuming the use of lignite, and bituminous coal is taken as an example of the gasification raw material introduced into the gasification gas generation systems 100 and 400. Explained and explained. However, the gasification raw material actually introduced into the gasification gas generation systems 100 and 400 has a larger calorific value than the gasification raw material used as a reference when designing the gasification gas generation device 110 (the gasification efficiency is higher). The gasification raw material is not limited to lignite and bituminous coal as long as it is low and has a lot of residue.

  INDUSTRIAL APPLICABILITY The present invention can be used for a gasification gas generation system that generates gasification gas by gasifying a gasification raw material.

100, 400 Gasified gas generation system 110 Gasified gas generation device 120 Combustion furnace 130 Cyclone (second cyclone)
140 Delivery pipe 142 Inlet loop seal (second loop seal)
150 Gasification furnace 160 Delivery pipe 162 Outlet loop seal 210 Cooling mechanism 220 Cyclone (first cyclone)
230 Return pipe 232 First loop seal 240, 410 Cooling unit

Claims (6)

A combustion furnace for heating the fluid medium;
A gasification furnace in which a fluidized medium heated by the combustion furnace is introduced, and gasified raw material is gasified with heat of the fluidized medium to generate gasified gas;
With
The fluid medium circulates between the combustion furnace and the gasification furnace,
In the combustion furnace, the fluidized medium and the residue of the gasified raw material are introduced from the gasification furnace, the combustion furnace burns the residue and heats the fluidized medium,
A gasified gas generation system, further comprising a cooling mechanism that takes out the heated fluid medium from the combustion furnace, cools it, and then returns it to the combustion furnace. The cooling mechanism is
A first cyclone that separates the fluidized medium and the combustion exhaust gas into which the fluidizing medium and the combustion exhaust gas heated in the combustion furnace are introduced;
A return pipe for returning the fluid medium separated by the first cyclone to the combustion furnace;
A first loop seal that is disposed in the return pipe and prevents the backflow of combustion exhaust gas generated in the combustion furnace to the first cyclone;
One or more cooling units for cooling the fluid medium in one or more selected from the group of the first cyclone, the return pipe, and the first loop seal;
The gasified gas generation system according to claim 1, comprising: A combustion furnace for heating the fluid medium;
A gasification furnace in which a fluidized medium heated by the combustion furnace is introduced, and gasified raw material is gasified with heat of the fluidized medium to generate gasified gas;
With
The fluid medium circulates between the combustion furnace and the gasification furnace,
In the combustion furnace, the fluidized medium and the residue of the gasified raw material are introduced from the gasification furnace, the combustion furnace burns the residue and heats the fluidized medium,
One or a plurality of cooling units for cooling the fluid medium in a route from the combustion furnace to the gasification furnace among the circulation paths of the fluid medium;
A gasified gas generation system comprising: A second cyclone that introduces a fluid medium and flue gas heated in the combustion furnace and separates the fluid medium and the flue gas;
A delivery pipe for delivering the fluidized medium separated by the second cyclone to the gasification furnace;
A second loop seal that is disposed in the delivery pipe and prevents backflow of gasification gas generated in the gasification furnace to the second cyclone;
With
The cooling unit cools the fluidized medium in one or more selected from the group of the second cyclone, the delivery pipe, and the second loop seal, so that the gasification furnace from the combustion furnace in the circulation path. The gasified gas generation system according to claim 3, wherein the fluidized medium is cooled in the path up to.   The gas according to any one of claims 2 to 4, wherein the cooling section heat-exchanges between water and the fluidized medium to cool the fluidized medium and generate water vapor. Gas generation system.   The gasification gas generation system according to any one of claims 1 to 5, wherein the gasification raw material is bituminous coal.

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