JP2020127909A - Cyclone, gasification furnace, gasification combined cycle power generation facility, and manufacturing method of cyclone - Google Patents

Abstract

To provide a long-life cyclone capable of preventing decline of efficiency of the cyclone.SOLUTION: A cyclone 161 includes a cyclone body 162 for introducing inside generated gas generated when gasifying a carbon-containing solid fuel containing carbon, and for centrifugally separating particles in the generated gas from the generated gas, an inlet part 163 for introducing the generated gas inside the cyclone body 162, and a patch 167 provided on the outer peripheral surface on the opposite side to the inner peripheral surface of the cyclone body 162 to a rotation direction of the generated gas including a position in an introduction direction of the generated gas introduced from the inlet part 163.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a cyclone, a gasification furnace, a gasification combined cycle power generation facility, and a cyclone manufacturing method.

Conventionally, as a gasifier facility, carbon-containing solid fuel such as coal is supplied into the gasifier, and the carbon-containing solid fuel is partially combusted to gasify to produce a combustible gas. Equipment (coal gasification equipment) is known.

The coal gasification facility is a facility for separating and recovering unreacted solids such as coal and ash (char) contained in the produced gas produced by gasifying solid carbon-containing fuel such as coal in a gasification furnace. (Dust collection equipment) is provided. As the dust collecting equipment, a centrifugal separator (cyclone) that separates and collects char in the produced gas by using centrifugal force is generally applied.

As a cyclone provided in a coal gasification facility, for example, the technologies described in Patent Documents 1 and 2 below have been reported. Patent Document 1 discloses a cyclone having a double structure in which a non-pressure resistant cyclone body is provided inside a pressure vessel as a cyclone that is connected to a gasification furnace and centrifuges a mixed fluid of slag and water. .. In the cyclone of Patent Document 1, the cyclone body is supported from above by a suspension rod, and the upper portion of the pressure vessel is configured to be openable, whereby the cyclone body can be lifted and replaced by a crane or the like.

Patent Document 2 discloses, as a cyclone used for separating chars, a structure in which the lower part of the cyclone main body can be divided. In the cyclone of Patent Document 2, the divided parts can be exchanged by moving them into and out of a manhole provided in the pressure vessel.

JP, 2017-140554, A JP, 2017-127796, A

Here, for example, in a cyclone applied to equipment that separates and recovers unreacted solids such as coal and ash (char), the cyclone body installed inside has a function of centrifuging the char in the produced gas. Have. However, as a result of earnest research by the inventors, when the char swirls inside the cyclone body, the generated gas introduced into the inside of the cyclone body locally and accelerates at the first contact portion of the inner peripheral surface of the cyclone body. It was found that the wear of the cyclone body and the progress of metal thinning became large. In addition, the cyclone efficiency is reduced and the life of the cyclone is shortened due to the expansion of the region where much wear and thinning occur in the internal space of the cyclone body. In order to extend the life of the cyclone, it is necessary to improve the local and accelerated wear and the part where the progress of metal thinning occurs.

In addition, in order to replace the cyclone body, incidental work such as temporary removal of the pressure vessel and temporary removal of the downstream pipes such as the generated gas pipe may occur, so maintenance of the cyclone body is easy and low. There is also a demand for a structure that can be performed at a low cost.

In addition, chrome-based cast iron may be used as the material of the cyclone body due to its wear resistance, but chrome-based cast iron has excellent wear resistance at high temperatures, but has a high carbon content and is not suitable for overlaying and welding. However, it becomes difficult to repair the worn or thinned inner peripheral surface from inside the cyclone body.

The present disclosure has been made in view of such circumstances, and it is possible to prevent the efficiency of a cyclone from decreasing, a cyclone having a long life, a gasification furnace including the cyclone, and a combined gasification combined cycle facility. , And a method for producing a cyclone.

In order to solve the above problems, the present disclosure adopts the following means.
The cyclone according to the present disclosure includes a cyclone main body, into which a product gas produced when gasifying a carbon-containing solid fuel containing carbon is introduced to centrifuge particles in the product gas from the product gas, An inlet portion that guides the generated gas into the cyclone body, and an outer circumference that is opposite to the inner peripheral surface of the cyclone body in the rotation direction of the generated gas that includes a position in the introduction direction of the generated gas that is guided from the inlet portion. And a pad plate provided on the surface.

In the cyclone of the present disclosure, a backing plate is provided on the outer peripheral surface opposite to the inner peripheral surface of the cyclone main body in the rotation direction of the generated gas including the position in the introduction direction of the generated gas guided from the inlet of the cyclone main body. There is. As a result, even if the area with much wear and thinning on the inner peripheral surface of the cyclone body expands and progresses, the cyclone body can be continuously used by the pad plate present on the outer peripheral surface side of the cyclone body. It is possible to prevent the life of the product from being shortened. Therefore, the cyclone has a long life. In addition, since it is not necessary to replace the cyclone body, for example, when accommodating the cyclone body in the pressure vessel, incidental work such as temporarily removing the pressure vessel or temporarily removing wake pipes such as generated gas pipes will occur. Can be suppressed. Further, since a simple measure such as providing a contact plate on the cyclone body is sufficient, the material cost can be reduced. Therefore, when the maintenance of the cyclone body is performed, the maintenance can be performed easily and at low cost. When chromium-based cast iron is used as the material of the cyclone main body, it has excellent wear resistance at high temperatures, but has a high carbon content, so it is not suitable for repairs such as overlaying and welding. However, by providing a backing plate on the outer peripheral surface on the side opposite to the inner peripheral surface of the cyclone main body as described above, a repair measure for difficult repair by overlaying or welding from inside the cyclone main body of chrome-based cast iron is provided. It can be carried out.

In the cyclone, it is preferable that a support box for accommodating and supporting the contact plate is attached to the outer peripheral surface side of the cyclone body.

In this way, since the support box for accommodating the backing plate and supporting the backing plate is attached to the outer peripheral surface side of the cyclone body, the backing plate can be reliably fixed to the cyclone body. In addition, for example, an outlet inner cylinder for discharging generated gas is provided inside the cyclone body, and the support box is secured to the cyclone body by using a U-bolt wound around the outer circumference of the outlet inner cylinder. It is possible to adopt the mode.

In the cyclone, a pressure vessel accommodating the cyclone body and the support box, a biasing member provided between the support box and the pressure vessel, the biasing member to the support box and the pressure vessel And a biasing member that biases the support box toward the outer peripheral surface of the cyclone main body when the support box and the pressure vessel are pushed by the fixing member. Therefore, it is preferable to be fixed.

By providing the biasing member (for example, a spring plate) and the fixing member (for example, a pushing bolt that applies a biasing force to the spring plate by pushing the spring plate) as described above, the pressure vessel and the cyclone main body can be provided. The reaction force generated can prevent the support box from slipping or falling off, and the elasticity of the urging member can absorb the thermal expansion during operation. In addition, by pushing the urging member with the fixing member to fix it to the cyclone body side so as to urge the support box, the urging member keeps the urging force on the support box even after the backing plate is installed. Can be fixed to the cyclone body side. With this configuration, the fixing member that can be pushed into the urging member can change the presence or absence of the urging force between the pressure vessel and the cyclone body by the urging member. Can be easy.

In the cyclone, it is preferable that a filler is filled between an outer surface of the pad plate and an inner surface of the support box facing the outer surface of the pad plate.

In this way, by filling the filler between the outer surface of the backing plate facing the pressure vessel side and the inner surface of the support box facing the outer surface of the backing plate, the adhesion between the support box and the backing plate is improved. Can be increased. Further, by filling the filler on the outside of the pad plate, the filler is also filled in the gaps formed around the outer surface of the pad plate, so that the outer surface of the pad plate can be sufficiently protected.

In the cyclone, it is preferable that a joint material is filled between the outer peripheral surface of the cyclone main body and a surface of the pad plate that faces the outer peripheral surface of the cyclone main body.

In this way, by filling the joint material (for example, a material similar to the filler) between the outer peripheral surface of the cyclone body and the surface of the pad plate that faces the outer peripheral surface of the cyclone body, the cyclone body and the pad plate It is possible to seal the gap generated between the and. As a result, the close contact between the cyclone body and the backing plate can be improved, and a gap can be prevented.

In the cyclone, the head of the bolt is embedded in the backing plate and the threaded portion of the bolt is projected from the surface of the backing plate, or the head of the flat head bolt is inside the thickness of the backing plate. It is preferable that a through hole through which the threaded portion of the countersunk bolt is inserted is formed while accommodating and restraining and supporting the rotation of the countersunk bolt in the axial direction.

The head of the bolt is embedded as a backing plate (for example, if the backing plate is a cast product, the bolt is encased), and the screw part of the bolt projects from the outer surface of the backing plate to the pressure vessel side. The bolt head does not need to be newly protected from wear. Further, since it is not necessary to prepare a new bolt for fixing the contact plate, the number of parts can be reduced. Furthermore, since the head of the bolt is embedded in the backing plate, it is possible to prevent the occurrence of a gap between the head of the bolt and the backing plate, and to restrain the rotation of the bolt in the axial direction for reliable support. it can. Further, the head of a flat head bolt (for example, a high chromium cast iron bolt) as a backing plate is accommodated inside the thickness of the backing plate to restrain and support the rotation of the flat head bolt in the axial direction, and the threaded portion of the flat head bolt is inserted. If the plate bolt having the through hole is used, the flat head bolt inserted into the flat plate can be removed from the flat plate, so that the flat head bolt can be maintained or replaced if the flat plate bolt is damaged.

In the cyclone, it is preferable that the patch plate is made of high chromium cast iron.

When the material of the patch plate is made of high chromium cast iron (for example, 25 Cr cast iron) among the chromium-based cast iron, the wear resistance of the patch plate at high temperature can be improved. Further, since the bolt used for fixing the backing plate cannot be fixed by welding to the backing plate made of high chromium cast iron having high wear resistance, it can be fixed as a cast packet.

The present disclosure also provides a gasification furnace including the above cyclone and gasifying the carbon-containing solid fuel.

Since the gasification furnace of the present disclosure includes the above-mentioned cyclone, it prevents the life of the cyclone from being shortened even if a region with much wear or wall thinning expands and progresses on the inner peripheral surface of the cyclone body. be able to. Therefore, the cyclone can have a long life. In addition, maintenance of the cyclone body in the cyclone can be performed easily and at low cost. Therefore, it becomes a highly economical gasifier.

Further, the present disclosure discloses a gas turbine that is rotationally driven by burning at least a part of the generated gas generated in the gasification furnace described above, and a heat recovery steam generator that introduces turbine exhaust gas discharged from the gas turbine. There is provided a gasification combined cycle power generation facility including a steam turbine rotatably driven by the steam, and the gas turbine and/or a generator rotatably connected to the steam turbine.

If the integrated gasification combined cycle facility of the present disclosure is equipped with the above-mentioned cyclone, the life of the cyclone is shortened even if the area with much wear and wall thinning expands and progresses on the inner peripheral surface of the cyclone body. Can be prevented. Therefore, the cyclone can have a long life. In addition, maintenance of the cyclone body in the cyclone can be performed easily and at low cost. Therefore, the gasification combined cycle power generation facility (gasification combined power generation system) is highly economical.

In addition, the present disclosure provides a cyclone main body that introduces a product gas generated when gasifying a carbon-containing solid fuel containing carbon into the interior of the cyclone body, and centrifuges particles in the product gas from the product gas. A preparatory step of preparing a cyclone that includes an inlet portion that guides the generated gas into a cyclone body, and the cyclone body in a rotation direction of the generated gas that includes a position in the introduction direction of the generated gas that is guided from the inlet portion. There is provided a method for manufacturing a cyclone, which has an installation step of installing a backing plate on the outer peripheral surface opposite to the inner peripheral surface.

The method for producing a cyclone according to the present disclosure is to install a backing plate on the outer peripheral surface of the cyclone body opposite to the inner peripheral surface in the rotation direction of the generated gas including the position of the introduction direction of the generated gas introduced from the inlet of the cyclone body. There is an installation process to do. As a result, even if the area with much wear and thinning on the inner peripheral surface of the cyclone body expands and progresses, the cyclone body can be continuously used by the pad plate on the outer peripheral surface side of the cyclone body. It is possible to prevent the life of the product from decreasing. Therefore, a cyclone having a long life can be manufactured. Further, in the manufactured cyclone, since it is not necessary to replace the cyclone body, for example, when the cyclone body is housed in the pressure vessel, the pressure vessel is temporarily removed, or the downstream piping such as the produced gas pipe is temporarily removed. It is possible to suppress the occurrence of incidental work. Further, since a simple measure such as providing a contact plate on the cyclone body is sufficient, the material cost can be reduced. Therefore, when the maintenance of the cyclone body is performed, the maintenance can be performed easily and at low cost. In addition, when chromium-based cast iron (for example, high chromium cast iron such as 25Cr cast iron) is used as the material of the cyclone body, it has excellent wear resistance at high temperatures, while it has a high carbon content, so it can be used for overlaying or welding. It is not suitable for repairing etc. However, by installing a backing plate on the outer peripheral surface on the side opposite to the inner peripheral surface of the cyclone body as described above, it is difficult to repair chromium-based cast iron from the inside of the cyclone body by overlaying or welding. Can be carried out.

In the cyclone manufacturing method, it is preferable that a plurality of the contact plates be prepared, and in the installation step, the plurality of contact plates be sequentially installed on the outer peripheral surface of the cyclone body.

If a plurality of caul plates are prepared, it becomes possible to sequentially dispose a plurality of caul plates on the outer peripheral surface of the cyclone main body when the caul plates are installed. Therefore, for example, by preparing a plurality of patch plates that are sized to fit into a manhole, which is an opening for maintenance provided in the pressure vessel, it is possible to sequentially carry the patch plates through the manhole. Become. By doing this, the work of installing the backing plate can be performed inside the pressure vessel, and the replacement work is performed for the area where the backing plate needs to be replaced at the time of maintenance. Maintenance can be suppressed. Further, it is possible to prevent the incidental work such as the temporary removal of the pressure vessel and the produced gas pipe from occurring. That is, the work period for maintenance can be shortened.

According to the cyclone of the present disclosure, it is possible to prevent the efficiency of the cyclone from decreasing, and the cyclone has a long life. Further, for example, when performing maintenance on the cyclone main body, maintenance can be performed easily and at low cost.

1 is a schematic configuration diagram showing an integrated coal gasification combined cycle power generation facility according to an embodiment of the present disclosure. It is a schematic block diagram which showed the gasification furnace equipment of FIG. It is a perspective view showing composition of an upper part of a cyclone concerning one embodiment of this indication. FIG. 3 is a vertical cross-sectional view showing a configuration near a support box according to an embodiment of the present disclosure. It is a side view which shows the state in which the biasing member of FIG. 4 was fixed by the fixing member. FIG. 5 is a side view showing a state where the biasing member of FIG. 4 is not fixed by a fixing member. It is a partial perspective view which shows the state before a contact plate is provided in a cyclone main body. It is a partial perspective view which shows the state after a backing plate is provided in the cyclone main body. FIG. 6 is a partial perspective view showing a state after the outer surface of the pad is filled with the filler.

Hereinafter, an embodiment of a cyclone, a gasification furnace, a gasification combined cycle power generation facility, and a cyclone manufacturing method according to the present disclosure will be described with reference to the drawings. In the present embodiment, the upper side means the vertically upper side direction, and the lower side means the vertically lower side direction.

[Coal gasification combined cycle power generation facility (gasification combined power generation facility)]
Hereinafter, a cyclone according to an embodiment of the present disclosure will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of an integrated coal gasification combined cycle facility to which a cyclone according to this embodiment is applied.

An integrated coal gasification combined cycle (IGCC: Integrated Coal Gasification Combined Cycle) 10 to which the gasification furnace facility 14 according to the present embodiment is applied uses air as an oxidant mainly, and in the gasification furnace facility 14, The air combustion method that generates combustible gas (produced gas) from fuel is adopted. Then, the integrated coal gasification combined cycle power generation facility 10 refines the generated gas generated in the gasification furnace facility 14 in the gas purification facility 16 into a fuel gas, and then supplies the gas to the gas turbine 17 for power generation. That is, the integrated coal gasification combined cycle power generation facility 10 of the present embodiment is an air combustion type (air blown) power generation facility. As the fuel supplied to the gasification furnace facility 14, for example, carbon-containing solid fuel such as coal is used.

As shown in FIG. 1, a coal gasification combined cycle power generation facility (gasification combined power generation facility) 10 includes a coal supply facility 11, a gasification furnace facility 14, a char recovery facility 15, a gas purification facility 16, and a gas turbine. 17, a steam turbine 18, a generator 19, and a heat recovery steam generator (HRSG: Heat Recovery Steam Generator) 20.

Coal feeding facility 11 is supplied with coal, which is a carbon-containing solid fuel, as raw coal, and pulverizes the coal in a coal mill (not shown) or the like to produce pulverized coal pulverized into fine particles. The pulverized coal produced in the coal feeding facility 11 is pressurized at the outlet of the coal feeding line 11a by nitrogen gas as a transport inert gas supplied from an air separation facility 42 described later, and is supplied to the gasification furnace facility 14. To be done. The inert gas is an inert gas having an oxygen content of about 5% by volume or less, and nitrogen gas, carbon dioxide gas, argon gas, etc. are typical examples, but are not necessarily limited to about 5% by volume or less. ..

The gasifier equipment 14 is supplied with the pulverized coal produced in the coal supply equipment 11 and the char (unreacted content of coal and ash) recovered in the char recovery equipment 15 for the purpose of reuse. There is.

A compressed air supply line 41 from a gas turbine 17 (compressor 61) is connected to the gasification furnace facility 14, and a part of the compressed air compressed by the gas turbine 17 is pressurized by a booster 68 to a predetermined pressure. It can be supplied to the gasification furnace facility 14 after being boosted in pressure. The air separation equipment 42 separates nitrogen and oxygen from the air in the atmosphere, and the air separation equipment 42 and the gasification furnace equipment 14 are connected by the first nitrogen supply line 43. The first nitrogen supply line 43 is connected to the coal supply line 11a from the coal supply facility 11. Further, a second nitrogen supply line 45 branching from the first nitrogen supply line 43 is also connected to the gasification furnace facility 14, and a char return line 46 from the char recovery facility 15 is connected to the second nitrogen supply line 45. It is connected. Further, the air separation facility 42 is connected to the compressed air supply line 41 by the oxygen supply line 47. The nitrogen separated by the air separation equipment 42 is used as a carrier gas for coal or char by flowing through the first nitrogen supply line 43 and the second nitrogen supply line 45. Further, the oxygen separated by the air separation equipment 42 is used as an oxidant in the gasification furnace equipment 14 by flowing through the oxygen supply line 47 and the compressed air supply line 41.

The gasification furnace facility 14 includes, for example, a two-stage spouted bed type gasification furnace 101 (see FIG. 2 ). The gasification furnace facility 14 partially combusts the coal (pulverized coal) and the char supplied therein with an oxidant (air, oxygen) to gasify them to form a produced gas. The gasification furnace facility 14 is provided with a foreign matter removing facility 48 for removing foreign matter (slag) mixed in the pulverized coal. A generated gas line 49 for supplying the generated gas to the char recovery facility 15 is connected to the gasification furnace facility 14 so that the generated gas containing char can be discharged. In this case, as shown in FIG. 2, a syngas cooler 102 (gas cooler) may be provided in the produced gas line 49 to cool the produced gas to a predetermined temperature and then supply it to the char recovery facility 15.

The char recovery facility 15 includes a dust collecting facility 51 and a supply hopper 52. In this case, the dust collecting equipment 51 is composed of one or more cyclones or porous filters, and can separate the char contained in the produced gas produced in the gasification furnace equipment 14. Then, the generated gas from which the char has been separated is sent to the gas purification facility 16 through the gas discharge line 53. The supply hopper 52 stores the char separated from the generated gas in the dust collecting facility 51. A bin may be arranged between the dust collecting equipment 51 and the supply hopper 52, and a plurality of supply hoppers 52 may be connected to this bin. The char return line 46 from the supply hopper 52 is connected to the second nitrogen supply line 45.

The gas refining facility 16 purifies gas by removing impurities such as sulfur compounds and nitrogen compounds from the generated gas from which char has been separated by the char recovery facility 15. Then, the gas refining facility 16 refines the generated gas to produce a fuel gas, and supplies this to the gas turbine 17. Since the produced gas from which the char has been separated still contains a sulfur content (H ₂ S, etc.), the gas purification facility 16 removes and recovers the sulfur content with an amine absorbing solution or the like, and uses it effectively. To do.

The gas turbine 17 includes a compressor 61, a combustor 62, and a turbine 63, and the compressor 61 and the turbine 63 are connected by a rotary shaft 64. The combustor 62 is connected to a compressed air supply line 65 from the compressor 61, a fuel gas supply line 66 from the gas purification facility 16, and a combustion gas supply line 67 extending toward the turbine 63. Are connected. Further, the gas turbine 17 is provided with a compressed air supply line 41 extending from the compressor 61 to the gasification furnace facility 14, and a booster 68 is provided in the middle thereof. Therefore, in the combustor 62, a part of the compressed air supplied from the compressor 61 and at least a part of the fuel gas supplied from the gas purification facility 16 are mixed and burned to generate a combustion gas, which is generated. The generated combustion gas is supplied to the turbine 63. Then, the turbine 63 rotationally drives the rotating shaft 64 by the supplied combustion gas to rotationally drive the generator 19.

The steam turbine 18 includes a turbine 69 connected to the rotary shaft 64 of the gas turbine 17, and the generator 19 is connected to a base end portion of the rotary shaft 64. The exhaust heat recovery boiler 20 is connected to the exhaust gas line 70 from the gas turbine 17 (turbine 63), and heat is exchanged between the water supplied to the exhaust heat recovery boiler 20 and the exhaust gas of the turbine 63 to generate steam. Is generated. Further, the exhaust heat recovery boiler 20 is provided with a steam supply line 71 between the turbine 69 of the steam turbine 18 and a steam recovery line 72, and a steam recovery line 72 is provided with a condenser 73. The steam generated in the exhaust heat recovery boiler 20 may include steam generated by heat exchange with the generated gas in the syngas cooler 102 of the gasification furnace 101. Therefore, in the steam turbine 18, the turbine 69 is rotationally driven by the steam supplied from the exhaust heat recovery boiler 20, and the rotating shaft 64 is rotated to rotationally drive the generator 19.

A gas purifying facility 74 is provided from the outlet of the exhaust heat recovery boiler 20 to the chimney 75.

Here, the operation of the integrated coal gasification combined cycle power generation facility 10 of the present embodiment will be described.

In the integrated coal gasification combined cycle power generation facility 10 of the present embodiment, when raw coal (coal) is supplied to the coal feeding facility 11, the coal becomes pulverized coal by being pulverized into fine particles in the coal feeding facility 11. .. The pulverized coal produced in the coal feeding equipment 11 is supplied to the gasification furnace equipment 14 through the first nitrogen supply line 43 by the nitrogen supplied from the air separation equipment 42. Further, the char recovered by the char recovery facility 15 described later is supplied to the gasification furnace facility 14 through the second nitrogen supply line 45 by the nitrogen supplied from the air separation facility 42. Further, the compressed air extracted from the gas turbine 17, which will be described later, is pressurized by the booster 68 and then supplied to the gasification furnace facility 14 through the compressed air supply line 41 together with oxygen supplied from the air separation facility 42.

In the gasification furnace facility 14, the supplied pulverized coal and char are combusted with compressed air (oxygen), and the pulverized coal and char are gasified to generate a produced gas. Then, the produced gas is discharged from the gasification furnace facility 14 through the produced gas line 49 and sent to the char recovery facility 15.

In the char recovery facility 15, the generated gas is first supplied to the dust collecting facility 51, so that fine char contained in the generated gas is separated. Then, the generated gas from which the char has been separated is sent to the gas purification facility 16 through the gas discharge line 53. On the other hand, the fine char separated from the generated gas is accumulated in the supply hopper 52, returned to the gasification furnace facility 14 through the char return line 46, and is recycled.

The product gas from which the char has been separated by the char recovery facility 15 is purified by the gas purification facility 16 by removing impurities such as sulfur compounds and nitrogen compounds to produce a fuel gas. The compressor 61 generates compressed air and supplies it to the combustor 62. The combustor 62 mixes the compressed air supplied from the compressor 61 and the fuel gas supplied from the gas purification facility 16 and combusts the mixed gas to generate a combustion gas. By rotating the turbine 63 with this combustion gas, the compressor 61 and the generator 19 are rotated via the rotating shaft 64. In this way, the gas turbine 17 can generate electricity.

Then, the exhaust heat recovery boiler 20 generates steam by exchanging heat between the exhaust gas discharged from the turbine 63 of the gas turbine 17 and the water supply to the exhaust heat recovery boiler 20, and the generated steam is used to generate the steam. Supply to. In the steam turbine 18, the turbine 69 is rotatably driven by the steam supplied from the exhaust heat recovery boiler 20, so that the generator 19 is rotatably driven through the rotating shaft 64 to generate power.
The gas turbine 17 and the steam turbine 18 do not need to rotate one generator 19 with the same shaft, and may rotate multiple generators with another shaft.

Then, in the gas purification facility 74, harmful substances in the exhaust gas discharged from the exhaust heat recovery boiler 20 are removed, and the purified exhaust gas is released from the chimney 75 to the atmosphere.

Next, with reference to Drawing 1 and Drawing 2, gasification furnace equipment 14 in coal gasification combined cycle equipment 10 mentioned above is explained in detail. FIG. 2 is a schematic configuration diagram showing the gasification furnace facility of FIG. 1.

As shown in FIG. 2, the gasification furnace facility 14 includes a gasification furnace 101 and a syngas cooler 102.

The gasification furnace 101 is formed so as to extend in the vertical direction. Pulverized coal and oxygen are supplied to the lower side in the vertical direction, and the product gas gasified by partial combustion goes from the lower side to the upper side in the vertical direction. Are in circulation. The gasification furnace 101 has a pressure vessel 110 and a gasification furnace wall (furnace wall) 111 provided inside the pressure vessel 110. The gasification furnace 101 has an annulus portion 115 formed in the space between the pressure vessel 110 and the gasification furnace wall 111. Further, in the gasification furnace 101, in the space inside the gasification furnace wall 111, the combustor section 116, the diffuser section 117, and the reducer section 118 are sequentially arranged from the lower side in the vertical direction (that is, the upstream side in the flowing direction of the generated gas). Is formed.

The pressure vessel 110 is formed in a tubular shape having a hollow space inside, and a gas discharge port 121 is formed at an upper end portion thereof, and a slag hopper 122 is formed at a lower end portion (bottom portion) thereof. The gasification furnace wall 111 is formed in a tubular shape having a hollow space inside, and its wall surface is provided so as to face the inner surface of the pressure vessel 110. In this embodiment, the pressure vessel 110 has a cylindrical shape, and the diffuser portion 117 of the gasification furnace wall 111 also has a cylindrical shape. The gasification furnace wall 111 is connected to the inner surface of the pressure vessel 110 by a support member (not shown).

The gasification furnace wall 111 separates the inside of the pressure vessel 110 into an internal space 144 and an external space 146. As will be described later, the gasification furnace wall 111 has a cross-sectional shape that changes at the diffuser section 117 between the combustor section 116 and the reducer section 118. The upper end of the gasification furnace wall 111 on the vertically upper side is connected to the gas discharge port 121 of the pressure vessel 110, and the lower end on the vertically lower side is provided with a gap from the bottom of the pressure vessel 110. ing. The stored water is stored in the slag hopper 122 formed at the bottom of the pressure vessel 110, and the lower end of the gasification furnace wall 111 is submerged in the stored water to seal the inside and outside of the gasification furnace wall 111. It has stopped. Burners 126 and 127 are inserted in the gasification furnace wall 111, and the syngas cooler 102 is arranged in the internal space 144. The structure of the gasification furnace wall 111 will be described later.

The annulus portion 115 is a space formed inside the pressure vessel 110 and outside the gasification furnace wall 111, that is, an external space 146, and nitrogen, which is an inert gas separated by the air separation equipment 42, is not shown in the figure. Supplied through the supply line. Therefore, the annulus portion 115 becomes a space filled with nitrogen. An unillustrated in-furnace pressure equalizing pipe for equalizing the pressure in the gasification furnace 101 is provided near the upper portion of the annulus portion 115 in the vertical direction. The in-furnace pressure equalizing pipe is provided so as to communicate with the inside and outside of the gasification furnace wall 111, and the pressure between the inside (combustor section 116, the diffuser section 117 and the reducer section 118) and the outside (annulus section 115) of the gasification furnace wall 111. The pressure is approximately equalized so that the difference is within a predetermined pressure.

The combustor section 116 is a space for partially burning pulverized coal and char and air, and the gasification furnace wall 111 of the combustor section 116 is provided with a combustion device including a plurality of burners 126. The high-temperature combustion gas obtained by burning the pulverized coal and part of the char in the combustor section 116 passes through the diffuser section 117 and flows into the reducer section 118.

The reductor unit 118 is maintained at a high temperature necessary for the gasification reaction and supplies pulverized coal to the combustion gas from the combustor unit 116 to partially burn the pulverized coal into volatile components (carbon monoxide, hydrogen, lower hydrocarbons, etc.). ) And is gasified to generate product gas, and a combustion device including a plurality of burners 127 is arranged on the gasification furnace wall 111 in the reductor unit 118.

The syngas cooler 102 is provided inside the gasification furnace wall 111 and above the burner 127 of the reducer unit 118 in the vertical direction. The syngas cooler 102 is a heat exchanger, and includes an evaporator (evaporator) 131, a superheater (superheater) 132, and a node in order from the lower side in the vertical direction of the gasification furnace wall 111 (upstream side in the flowing direction of generated gas). A charcoal vessel (economizer) 134 is arranged. These syngas coolers 102 cool the generated gas by exchanging heat with the generated gas generated in the reducer unit 118. Also, the evaporator (evaporator) 131, the superheater (super heater) 132, and the economizer 134 are not limited to the numbers shown in the drawing.

Here, the operation of the above-described gasification furnace facility 14 will be described.
In the gasification furnace 101 of the gasification furnace facility 14, nitrogen and pulverized coal are charged and ignited by the burner 127 of the reductor unit 118, and pulverized coal and char and compressed air (oxygen) are generated by the burner 126 of the combustor unit 116. It is thrown in and ignited. Then, in the combustor unit 116, high temperature combustion gas is generated by the combustion of pulverized coal and char. Further, in the combustor unit 116, molten slag is generated in the high temperature gas by combustion of pulverized coal and char, and the molten slag adheres to the gasification furnace wall 111 and drops to the furnace bottom, and finally inside the slag hopper 122. It is discharged to the water storage. Then, the high temperature combustion gas generated in the combustor unit 116 passes through the diffuser unit 117 and rises to the reducer unit 118. In the reductor unit 118, the pulverized coal is maintained at a high temperature required for the gasification reaction, the pulverized coal is mixed with the high temperature combustion gas, and the pulverized coal is partially combusted in the high temperature reducing atmosphere to perform the gasification reaction. Is generated. The gasified product gas flows from the lower side to the upper side in the vertical direction.

Next, the cyclone according to this embodiment will be described. The cyclone according to this embodiment is applied to, for example, the dust collecting equipment 51 in FIG.

FIG. 3 is a perspective view showing the configuration of the upper portion of the cyclone according to this embodiment. In FIG. 3, thick arrows indicate the direction of introduction of the produced gas into the cyclone body. The cyclone 161 of this embodiment includes a cylindrical cyclone body (cyclone inner cylinder) 162. The cyclone body 162 is housed in a pressure container (not shown in FIG. 3).

The cyclone body 162 is connected to the cyclone body 162 with an inlet portion 163 for guiding the generated gas into the cyclone body 162 so as to open in the cyclone body 162. At the upper part of the cyclone main body 162, there is an outlet inner cylinder 164 for discharging the produced gas, which is obtained by centrifuging unreacted solid particles (char) in the cyclone main body 162, and one end thereof is vertically upward from the cyclone main body 162. And the other end is connected so as to open vertically downward in the cyclone body 162. The outlet inner cylinder 164 is connected to a gas exhaust line (not shown).

The product gas generated when the carbon-containing solid fuel containing carbon is gasified is introduced into the cyclone body 162 from the inlet portion 163 as indicated by the thick arrow in FIG. 3, and unreacted in the product gas. Solid particles (char) are centrifuged from the product gas. The separated char falls by gravity downward in the vertical direction of the cyclone body 162 and is collected in a supply hopper (not shown). On the other hand, the centrifugally separated product gas is guided from the outlet inner cylinder 164 to a porous filter (not shown) which is a structure of the dust collecting equipment 51 in order to remove further fine char.

The cyclone body 162 bears a load by an annular inner cylinder support ring 165 that surrounds the outer peripheral surface of the cyclone body 162. One end (lower end) of a plurality of suspenders (suspension rods) 166 is fixed to the inner cylinder support ring 165 by bolts or the like, and the inner cylinder support ring 165 is suspended by the plurality of suspenders 166. .. The other ends (upper ends) of the plurality of suspenders 166 are fixed to a pressure container (not shown in FIG. 3) by bolts or the like.

A plurality of pad plates 167 are provided on the outer peripheral surface of the cyclone body 162. In the present embodiment, the inner peripheral surface of the cyclone body 162 is at least 1/4 round or more, and more preferably 1/2 round or less in the direction in which the generated gas is introduced from the position in the introduction direction of the generated gas introduced from the inlet 163. A plurality of pad plates 167 are provided on the outer peripheral surface on the opposite side to. Note that FIG. 3 shows a part of the plurality of pad plates 167 installed.

On the outer peripheral surface side of the cyclone body 162, for example, an arc-shaped (fan-shaped) support box 168 centered on the central axis of the cyclone body 162 is provided on the inner cylinder support ring 165. The support box 168 has four surfaces, the surface on the cyclone body 162 side and the surface on the vertically upper side being open. The support box 168 can be divided into a plurality of pieces in the long side direction. The material of the support box 168 is, for example, a SUS-based material.

The plurality of pad plates 167 are accommodated in and supported by the support box 168. In addition, in the vicinity of the portion of the inner cylinder support ring 165 where one end of the suspender 166 is fixed, a suspender portion support box 169 may be provided instead of the support box 168. The hanging tool support box 169 is provided in a region of a circular arc shape (fan shape) narrower than that of the supporting box 168, in the vicinity of a portion where one end of the hanging tool 166 is fixed. Even if the cyclone body 162 is worn out, the suspension 166 is not worn, and the pad 167 has a U shape (not shown) so as to surround a portion where one end of the suspension 166 is fixed. You can

Both ends of the U-bolt 170 are connected and fixed to the upper portions of both ends in the circumferential direction of the support box 168. The U-shaped bent portion of the U-bolt 170 is wound around the outer circumference of the outlet inner cylinder 164, for example. With such a configuration, the support box 168 is supported so as to be in close contact with the outer peripheral surface side of the cyclone body 162. The U-shaped bent portion of the U-bolt 170 is not limited to the outer circumference of the outlet inner cylinder 164, and may be any structure located in the center direction of the cyclone body 162. For example, a support pin may be provided on the upper surface of the cyclone body 162 to support the U-shaped bent portion.

Next, referring to FIG. 4, the configuration in the vicinity of the support box in the present embodiment will be described in more detail.

FIG. 4 is a vertical cross-sectional view showing the configuration near the support box according to the present embodiment. In FIG. 4, the left side of the drawing shows the direction toward the center of the cyclone body 162, and the right side of the drawing shows the direction away from the center of the cyclone body 162. As shown in FIG. 4, the cyclone 161 includes a pressure vessel 171 that houses the cyclone main body 162 and the support box 168 at the outermost side.

A biasing member 172 is provided between the support box 168 and the pressure container 171. As the urging member 172, for example, a spring plate is applied. One end (vertically lower end) of the biasing member 172 is rotatably fixed by a pin 173. Further, the other end side (vertical upper end side) of the biasing member 172 can be brought into contact with and separated from the inner peripheral surface of the pressure vessel 171. Both ends of the pin 173 are respectively fixed to (a pair of) bias member fixing plate members 174 (only one is shown in FIG. 4). The end of the urging member fixing plate 174 on the cyclone body 162 side is in contact with the outer surface of the support box 168. A plurality of combinations of the biasing member 172, the pin 173, and the pair of biasing member fixing plate members 174 are provided along the circumferential direction of the cyclone body 162.

A linear fixing member 175 is installed vertically above the biasing member 172 between the outer surface of the support box 168 and the inner peripheral surface of the pressure container 171. The linear fixing member 175 extends in the vertical direction, and is movable in the vertical direction by a guide member 176 attached to the outer surface of the support box 168. A tip portion 177 on the lower end side of the fixing member 175 serving as the urging member 172 is a member having a function as a wedge, and a vertically moving means such as a push bolt is applied. A tip portion 177 on the lower end side of the fixing member 175 can come into contact with and separate from the urging member 172. By pushing the fixing member 175 vertically downward along the thick arrow in FIG. 4 and rotating it clockwise around the pin 173 fixed to the urging member 172, the urging member 172 has the other end. The side (vertical upper end side) is fixed in a state of being pressed against the inner peripheral surface of the pressure vessel 171 by contact.

A pad plate 167 is provided between the outer peripheral surface of the cyclone body 162 and the inner surface of the support box 168. The contact plate 167 is, for example, chrome-based cast iron, and more preferably made of high chrome cast iron (for example, 25Cr cast iron). A head 179a of a bolt (casting bolt) 178 is embedded in the contact plate 167, and a screw portion 179b of the bolt 178 projects from the outer surface of the contact plate 167 (the surface on the pressure vessel 171 side). The threaded portion 179b penetrates the support box 168 and is screwed with the nut 180 on the outer surface side of the support box 168. In FIG. 7, the head 179a of one bolt (casting bolt) 178 is embedded in the backing plate 167, but the number of bolts (casting bolt) 178 is not limited to one. , There may be more than one. Further, the bolt 178 preferably has heat resistance, and the material thereof is, for example, a SUS-based material.

A filler 181 is filled between the outer surface of the backing plate 167 and the inner surface of the support box 168 facing the outer surface of the backing plate 167. The filler 181 is filled on the outer surface side of the pad plate 167, and the filler 181 is provided on the outer surface of the pad plate 167 to improve the protection property. The thickness of the filler 181 is, for example, about 10 mm to 50 mm. The material of the filler 181 is, for example, a castable material that is cast by using alumina, silica, or a mixture thereof as a main material. As a result, the outer surface of the pad plate 167 is protected by the filler 181.

Further, for example, a joint material 182 of about 2 mm to 5 mm is filled between the outer peripheral surface of the cyclone main body 162 and the surface of the pad plate 167 facing the outer peripheral surface of the cyclone main body 162, so that no gap is generated. It has become. As the joint material 182, for example, a material similar to the filler 181 is applied.

Next, with reference to FIG. 5A and FIG. 5B, the configuration in which the biasing member in this embodiment is fixed by the fixing member will be described in more detail.
FIG. 5A is a side view showing a state in which the biasing member of FIG. 4 is fixed by a fixing member. FIG. 5B is a side view showing a state in which the biasing member of FIG. 4 is not fixed by the fixing member.

As shown in FIG. 5A, the fixing member 175 is inserted through the inside of the guide member 176 and is movable along the vertical vertical direction. When the urging member 172 is pressed by the fixing member 175 so that the urging member 172 is pressed and fixed to the fixing member 175, the tip portion 177 of the fixing member 175 has a lower end in the longitudinal direction of the urging member fixing plate member 174. The tip portion 177 is in contact with the biasing member 172. In this state, the biasing member 172 applies a biasing force to the support box 168 (not shown in FIG. 5A).

On the other hand, when the urging member 172 is not fixed by the fixing member 175, as shown in FIG. 5B, the tip portion 177 of the fixing member 175 is pushed only up to the upper part in the longitudinal direction of the urging member fixing plate member 174. First, the biasing member 172 is separated from the inner peripheral surface of the pressure container 171 (not shown). Therefore, the biasing member 172 can rotate about the pin 173. In this state, the biasing member 172 does not apply a biasing force to the support box 168 (not shown in FIG. 5B).

[Production method of cyclone]
Next, the cyclone manufacturing method according to the present embodiment will be specifically described with reference to FIGS.
In addition, below, although the case where the cyclone 161 shown in FIG. 3 is manufactured is demonstrated as an example, it is not limited to this.

(Preparation process)
In the preparation step, as shown in FIG. 6, in the cyclone 161′, the support box 168 is provided on the inner cylinder support ring 165. The support box 168 is supported and fixed by connecting both ends of the U-bolt 170 to the upper portions of both ends in the circumferential direction of the support box 168.

(Placement process)
In the arranging step, as shown in FIG. 7, a plurality of sheets are formed on the outer peripheral surface of the cyclone body 162 on the opposite side to the inner peripheral surface in the rotation direction of the generated gas including the position of the introduction direction of the generated gas introduced from the inlet portion. The pad 167 is sequentially installed. As the pad plate 167, the head of the bolt 178 is embedded (in the present embodiment, for example, the bolt 178 is cast-in), and the threaded portion 179b of the bolt 178 faces the pressure vessel 171 side of the pad plate 167. Use the one that projects from the side.

Next, as shown in FIG. 8, a filler 181 is filled on the outer surface side of the contact plate 167. As a result, the outer surface of the pad plate 167 is protected by the filler 181.

Next, the joint material 182 (not shown in FIG. 8, see FIG. 4) is filled between the outer peripheral surface of the cyclone main body 162 and the surface of the pad plate 167 opposite to the outer peripheral surface of the cyclone main body 162. As a result, the gap between the cyclone body 162 and the contact plate 167 is sealed.

With the configuration described above, according to this embodiment, the following operational effects are achieved.
In the cyclone 161 of the present embodiment, the cyclone body 162 is applied to the outer peripheral surface opposite to the inner peripheral surface in the rotation direction of the generated gas including the position in the introduction direction of the generated gas guided from the inlet portion 163 of the cyclone body 162. A plate 167 is provided. As a result, even if an area with much wear and thinning on the inner peripheral surface of the cyclone main body 162 expands and progresses, it is possible to continuously use the cyclone main body 162 by the contact plate 167 existing on the outer peripheral surface side of the cyclone main body 162. Therefore, it is possible to prevent the life of the cyclone 161 from being shortened. Therefore, the cyclone 161 has a long life. In addition, since it is not necessary to replace the cyclone body 162, for example, when the cyclone body 162 is housed in the pressure vessel 171, the pressure vessel 171 is temporarily removed, or a downstream pipe such as a produced gas pipe is temporarily removed. It is possible to suppress construction work. In addition, since it is possible to simply provide the contact plate 167 on the cyclone body 162, the material cost can be reduced. Therefore, when the maintenance of the cyclone body 162 is performed, the maintenance can be performed easily and at low cost. Further, when chromium-based cast iron is used as the material of the cyclone body 162, it is excellent in wear resistance at high temperatures, but has a high carbon content, so it is not suitable for repair such as build-up or welding. However, by providing a backing plate on the outer peripheral surface opposite to the inner peripheral surface of the cyclone body 162 as described above, it is difficult to repair chromium-based cast iron from the inside of the cyclone body 162 by overlaying or welding. Measures can be implemented.

Further, since the support box 168 for accommodating the backing plate 167 and supporting the backing plate 167 is attached to the outer peripheral surface side of the cyclone main body 162, the backing plate 167 can be reliably fixed to the cyclone main body 162. .. Further, for example, an outlet inner cylinder 164 for discharging the generated gas is provided inside the cyclone main body 162, and a support box 168 is mounted using a U-bolt 170 wound around the outer circumference of the outlet inner cylinder 164. The cyclone body 162 may be secured to the cyclone body 162.

Further, by providing a biasing member (for example, a spring plate) 172 and a fixing member (for example, a pushing bolt that gives a biasing force to the spring plate by pushing the spring plate) 175, the pressure vessel 171 and the cyclone body 162 are connected. The reaction force generated between the support boxes 168 can prevent the support box 168 from slipping or falling off, and the elasticity of the biasing member 172 can absorb the thermal expansion during operation. Further, the biasing member 172 is pushed by the fixing member 175 to fix the support box 168 to the cyclone body 162 side so as to bias the support box 168, so that the biasing member 172 is installed even after the backing plate 167 and the like are installed. Can apply a biasing force to the support box 168 to fix it to the cyclone body 162 side. With this configuration, the presence or absence of the urging force between the pressure vessel 171 and the cyclone body 162 by the urging member 172 can be changed by the fixing member 175 that can be pushed into the urging member 172. Installation or removal of 168 can be facilitated.

Further, by filling the filling material 181 between the outer surface of the pad plate 167 facing the pressure vessel 171 side and the inner surface of the support box 168 facing the outer surface of the pad plate 167, the support box 168 and the pad plate 167 are provided. The adhesiveness between the two can be improved. Further, by filling the filling material 181 on the outside of the pad plate 167, the filling material is also filled in the gap generated around the outer surface of the pad plate 167, so that the outer surface of the pad plate 167 is sufficiently protected. be able to.

Further, by filling the joint material 182 between the outer peripheral surface of the cyclone main body 162 and the surface of the pad plate 167 opposite to the outer peripheral surface of the cyclone main body 162, the space between the cyclone main body 162 and the pad plate 167 is filled. The resulting gap can be sealed. As a result, the close contact between the cyclone body 162 and the contact plate 167 can be improved and a gap can be prevented.

Further, the head 179a of the bolt 178 is embedded as the contact plate 167 (for example, when the contact plate 167 is a cast product, the bolt 178 is cast-in), and the screw portion 179b of the bolt 178 is applied. If the plate 167 protruding from the outer surface to the pressure vessel 171 side is used, it is not necessary to newly protect the head 179a of the bolt 178 from abrasion. Further, since it is not necessary to prepare a new bolt for fixing the contact plate 167, the number of parts can be reduced. Further, since the head 179a of the bolt 178 is embedded in the abutment plate 167, a gap between the head 179a of the bolt 178 and the abutment plate 167 is prevented and the rotation of the bolt 178 in the axial direction is restricted. Can be reliably supported. In addition, a through hole through which the head portion of a flat head bolt (for example, a high chromium cast iron bolt) is housed inside the plate thickness as the contact plate 167 to restrain and support the rotation of the flat head bolt in the axial direction and through which the screw portion of the flat head bolt is inserted. If the countersunk bolt is formed, the countersunk bolt inserted into the countersink 167 can be removed from the counterstress 167, so that the countersunk bolt can be maintained or replaced if the countersunk bolt is damaged.

Further, when the material of the contact plate 167 is made of high chromium cast iron (for example, 25 Cr cast iron) among the chromium-based cast iron, the wear resistance of the contact plate 167 at high temperature can be improved. Further, since the bolt used for fixing the contact plate 167 cannot be fixed by welding to the contact plate 167 made of high chromium cast iron having high wear resistance, it can be fixed as a cast packet.

Further, since the gasification furnace 101 of the present embodiment includes the cyclone 161 described above, even if the region with much wear and wall thinning expands and progresses on the inner peripheral surface of the cyclone body 162, the cyclone 161 has It is possible to prevent the life from being shortened. Therefore, the cyclone 161 can have a long life. Further, the maintenance of the cyclone main body 162 in the cyclone 161 can be performed easily and at low cost. Therefore, the gasification furnace 101 is highly economical.

Further, since the integrated gasification combined cycle facility 10 of the present embodiment includes the cyclone 161 described above, even if a region with a large amount of wear and wall thinning expands and progresses on the inner peripheral surface of the cyclone body 162, the cyclone expands. It is possible to prevent the life of the 161 from decreasing. Therefore, the cyclone 161 can have a long life. Further, the maintenance of the cyclone main body 162 in the cyclone 161 can be performed easily and at low cost. Therefore, the gasification combined cycle power generation facility (gasification combined cycle power generation system) 10 is highly economical.

The method of manufacturing the cyclone 161 according to the present embodiment includes an outer peripheral surface opposite to the inner peripheral surface of the cyclone body 162 in the rotation direction of the generated gas including the position in the introduction direction of the generated gas introduced from the inlet 163 of the cyclone body 162. There is an installation step of installing the backing plate 167. As a result, even if a region with much wear and thinning on the inner peripheral surface of the cyclone body 162 expands and progresses, the caul plate 167 existing outside the cyclone body 162 enables continuous use of the cyclone body 162. It is possible to prevent the life of the cyclone 161 from being shortened. Therefore, the cyclone 161 having a long life can be manufactured. Further, in the manufactured cyclone 161, it is not necessary to replace the cyclone body 162. Therefore, for example, when the cyclone body 162 is housed in the pressure vessel 171, the pressure vessel 171 is temporarily removed, or a backflow of a generated gas pipe or the like is performed. It is possible to prevent incidental work such as temporary removal of piping. In addition, since it is possible to simply provide the contact plate 167 on the cyclone body 162, the material cost can be reduced. Therefore, when the maintenance of the cyclone body 162 is performed, the maintenance can be performed easily and at low cost. When chrome-based cast iron (for example, high chrome cast iron such as 25Cr cast iron) is used as the material of the cyclone body 162, the wear resistance at high temperature is excellent, but the carbon content is high, and Not suitable for repairs such as welding. However, by installing the contact plate 167 on the outer peripheral surface on the side opposite to the inner peripheral surface of the cyclone main body 162 as described above, it is difficult to repair the chromium-based cast iron from the inside of the cyclone main body 162 by overlaying or welding. Repair measures can be implemented.

In addition, if a plurality of pad plates 167 are prepared, it is possible to install the pad plates 167 sequentially with respect to the outer peripheral surface of the cyclone body 162 when installing the pad plate 167. Therefore, for example, if a plurality of patch plates 167 are prepared that are sized to fit into a manhole that is an opening for maintenance provided in the pressure vessel 171, the patch plates 167 can be sequentially loaded through the manhole. Is possible. By doing so, the installation work of the contact plate 167 can be performed inside the pressure vessel 171, and the replacement work is performed in the range where the contact plate 167 needs to be replaced at the time of maintenance. It is possible to suppress excessive maintenance in the. Furthermore, it is possible to prevent the incidental work such as temporary removal of the pressure vessel 171 and the generated gas pipe. That is, the work period for maintenance can be shortened.

It should be noted that, in the above-described embodiment, an example in which the pad 167 has a head 179a of a bolt 178 embedded in the pad 167 and a threaded portion 179b of the bolt 178 protruding from the surface of the pad 167 is used as an example. However, the present invention is not limited to this. Specifically, as the backing plate 167, a head of a flat head bolt (for example, high chromium cast iron bolt) is housed inside the backing plate 167 in the thickness of the backing plate 167, and the rotation of the flat head bolt in the axial direction is restrained and supported. In addition, a configuration may be used in which a through hole through which the threaded portion of the countersunk bolt is inserted is formed.

Further, in the above-described embodiment, the IGCC including the coal gasification furnace that generates a combustible gas from pulverized coal is described as an example, but the gasification furnace equipment of the present disclosure may include, for example, thinned wood, waste wood, driftwood, It can also be applied to those that gasify other carbon-containing solid fuels such as grass, waste, sludge, and biomass fuels such as tires. Further, the gasifier equipment of the present disclosure is applicable not only to power generation but also to a gasifier for a chemical plant that obtains a desired chemical substance.

Further, in the above-mentioned embodiment, although coal was used as the fuel, it is also applicable to other carbon-containing solid fuels such as high-grade coal and low-grade coal, and is not limited to coal, but renewable organisms. It may be a biomass fuel used as an organic resource of origin, for example, thinned wood, waste timber, driftwood, grasses, waste, sludge, tires and recycled fuel (pellets and chips) using these as raw materials. It is also possible to use

In the present embodiment, the tower type gasification furnace has been described as the gasification furnace 101. However, even if the gasification furnace 101 is a crossover type gasification furnace, the vertical vertical direction of each device in the gasification furnace 101 is generated. The same operation can be performed by replacing the gas so that the gas flow directions are the same.

10 Coal gasification combined cycle power generation facility (gasification combined power generation facility)
11 Coal Supply Facility 11a Coal Supply Line 14 Gasification Furnace Facility 15 Char Recovery Facility 16 Gas Purification Facility 17 Gas Turbine 18 Steam Turbine 19 Generator 20 Exhaust Heat Recovery Boiler 41 Compressed Air Supply Line 42 Air Separation Facility 43 First Nitrogen Supply Line 45 Second Nitrogen Supply Line 46 Char Return Line 47 Oxygen Supply Line 48 Foreign Material Removal Equipment 49 Foreign Gas Removal Equipment 51 Dust Collection Equipment 52 Supply Hopper 53 Gas Discharge Line 61 Compressor 62 Combustor 63 Turbine 64 Rotating Shaft 65 Compressed Air Supply Line 66 Fuel gas supply line 67 Combustion gas supply line 68 Booster 69 Turbine 70 Exhaust gas line 71 Steam supply line 72 Steam recovery line 73 Condenser 74 Gas purification facility 75 Chimney 101 Gasification furnace 102 Syngas cooler 110 Pressure vessel 111 Gasification furnace wall (Furnace wall)
115 annulus section 116 combustor section 117 diffuser section 118 reductor section 121 gas outlet 122 slag hopper 126 burner 127 burner 131 evaporator 132 superheater 134 economizer 144 internal space 146 external space 161 cyclone 162 cyclone body (cyclone inner cylinder)
163 Inlet 164 Outlet inner cylinder 165 Inner cylinder support ring 166 Lifting tool (hanging rod)
167 Paddle plate 168 Support box 169 Lifting part support box 170 U bolt 171 Pressure vessel 172 Biasing member 173 Pin 174 (Pair of biasing member) Fixing plate fixing plate 175 Fixing member 176 Guide member 177 Tip part 178 Bolt (casting bolt )
179a Head part 179b Screw part 180 Nut 181 Filler 182 Joint material

Claims (11)

A cyclone body, in which a product gas produced when gasifying a carbon-containing solid fuel containing carbon is introduced into the interior of the cyclone body to centrifuge particles in the product gas from the product gas,
An inlet portion for introducing the generated gas into the cyclone body,
A patch plate provided on the outer peripheral surface opposite to the inner peripheral surface of the cyclone main body in the rotation direction of the generated gas including the position in the introduction direction of the generated gas guided from the inlet portion,
Cyclone equipped with. The cyclone according to claim 1, wherein a support box that accommodates and supports the contact plate is attached to the outer peripheral surface side of the cyclone body. A pressure vessel that houses the cyclone body and the support box,
A biasing member provided between the support box and the pressure vessel,
A fixing member capable of fixing the biasing member to the support box and the pressure vessel,
Equipped with
The urging member is fixed by urging the support box toward the outer peripheral surface side of the cyclone body when being pushed into the support box and the pressure vessel by the fixing member. Cyclone. The cyclone according to claim 2 or 3, wherein a filler is filled between the outer surface of the pad and the inner surface of the support box facing the outer surface of the pad. The joint material is filled between the outer peripheral surface of the cyclone body and the surface of the pad plate on the side facing the outer peripheral surface of the cyclone body. The described cyclone. In the backing plate, the head of the bolt is embedded and the threaded portion of the bolt projects from the surface of the backing plate, or the head of the flat head bolt is housed inside the thickness of the backing plate and The cyclone according to any one of claims 1 to 5, wherein a through hole through which a screw portion of the flat head bolt is inserted is formed while restraining and supporting the rotation of the flat head bolt in the axial direction. The cyclone according to any one of claims 1 to 6, wherein the patch plate is made of high chromium cast iron. A cyclone according to any one of claims 1 to 7,
A gasification furnace for gasifying the carbon-containing solid fuel. A gas turbine that is rotationally driven by burning at least a part of the produced gas produced by the gasification furnace according to claim 8.
A steam turbine that is rotationally driven by steam generated in an exhaust heat recovery boiler that introduces turbine exhaust gas discharged from the gas turbine;
A generator rotationally connected to the gas turbine and/or the steam turbine;
Integrated gasification combined cycle facility. A cyclone body for guiding a product gas produced when gasifying a carbon-containing solid fuel containing carbon to the inside to centrifuge particles in the product gas from the product gas; and a cyclone body inside the cyclone body. A preparatory step of preparing a cyclone having an inlet part for guiding the generated gas;
Manufacturing a cyclone having an installation step of installing a backing plate on the outer peripheral surface of the cyclone body opposite to the inner peripheral surface in the rotation direction of the generated gas including the position in the introduction direction of the generated gas guided from the inlet portion. Method. Prepare a plurality of the backing plate,
The method for manufacturing a cyclone according to claim 10, wherein in the installation step, a plurality of the contact plates are sequentially installed on the outer peripheral surface of the cyclone body.

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