Particle recovery equipment

Abstract

To provide particle recovery equipment designed to extend the life of a filter for capturing particles contained in gas.SOLUTION: Particle recovery equipment includes: a cyclone configured to separate particles from gas by swirling the gas containing the particles; a pressure vessel including a cyclone housing chamber that houses the cyclone; a filter configured to capture the particles remaining in the gas discharged upward from the cyclone; a delivery line for guiding the particles, captured by the filter, toward a recovery chamber for recovering the particles discharged downward from the cyclone; and a first communication pipe that allows communication between the recovery chamber and the cyclone housing chamber.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to particle collection equipment for collecting particles from gas.

Background Art

[0002] Conventionally, particle collection equipment for collecting particles from gas containing particles has been known. For example, Patent Document 1 discloses a cyclone integrated storage device in which a cyclone and a particle storage chamber located below the cyclone are integrally configured. A gas containing particles is introduced into the cyclone. In the process of the gas swirling in the cyclone, particles (for example, coarse particles) are separated from the gas and fall into the particle storage chamber. The gas discharged upward from the cyclone is sent to a filter via an exhaust pipe. The filter captures particles (for example, fine particles) remaining in the gas. The captured particles are sent to the particle storage chamber via a feed pipe. Further, in the particle storage equipment disclosed in Patent Document 1, a communication pipe for communicating a pressure vessel housing the cyclone and the exhaust pipe is arranged. The communication pipe suppresses an increase in the pressure in the particle storage chamber through pressure equalization that reduces the differential pressure between the particle storage chamber and the flow path in the exhaust pipe.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the particles captured by the filter flow into the particle storage chamber via the feed pipe, there is a risk that the particles floating in the storage chamber may flow into the discharge pipe via the above communication pipe. Therefore, there is a risk that the amount of particles captured by the filter increases and the life of the filter is shortened.

[0005] An object of the present disclosure is to provide a particle recovery facility that extends the life of a filter for capturing particles contained in a gas.

Means for Solving the Problems

[0006] The particle recovery facility according to at least one embodiment of the present disclosure includes a cyclone configured to separate the particles from the gas by swirling the gas containing the particles, a pressure vessel including a cyclone housing chamber that houses the cyclone, a filter configured to capture the particles remaining in the gas discharged upward from the cyclone, a delivery line for guiding the particles captured by the filter toward a recovery chamber for recovering the particles discharged downward from the cyclone, a first communication pipe that communicates the recovery chamber and the cyclone housing chamber, and

Advantages of the Invention

[0007] According to the present disclosure, it is possible to provide a particle recovery facility that extends the life of a filter for capturing particles contained in a gas.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0009] Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present disclosure, but are merely illustrative examples. For example, expressions representing relative or absolute arrangements such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric", or "coaxial" not only strictly represent such arrangements, but also represent states in which there are tolerances or relative displacements with angles and distances that can achieve the same function. For example, expressions representing that things such as "identical", "equal", and "homogeneous" are in an equal state not only strictly represent an equal state, but also represent states in which there are tolerances or differences that can achieve the same function. For example, expressions representing shapes such as a rectangular shape or a cylindrical shape not only represent shapes such as a rectangular shape or a cylindrical shape in a geometrically strict sense, but also represent shapes including uneven portions, chamfered portions, etc. within a range where the same effect can be obtained. On the other hand, the expressions "comprising", "including", or "having" for one component are not exclusive expressions that exclude the existence of other components. Note that the same reference numerals may be given to the same configurations and the description may be omitted.

[0010] In addition, in the following description, "upward" refers to the direction vertically upward, and "upper" such as the upper part or the upper surface refers to the part vertically upward. Similarly, "down" refers to the part vertically downward, and the vertical direction is not strict and includes errors.

[0011] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a coal gasification combined power generation facility 10 to which a gasification furnace 101 according to an embodiment of the present disclosure is applied.

[0012] The coal gasification combined cycle power generation facility (IGCC: Integrated Coal Gasification Combined Cycle) 10 to which the gasification furnace 101 according to this embodiment is applied uses air as the main oxidant, and in the gasification furnace 101, an air combustion method for generating combustible gas (produced gas) from fuel is adopted. Then, in the coal gasification combined cycle power generation facility 10, the produced gas generated in the gasification furnace 101 is purified in the gas purification facility 16 to be fuel gas, and then supplied to the gas turbine 17 for power generation. That is, the coal gasification combined cycle power generation facility 10 of Embodiment 1 is a power generation facility using the air combustion method (air blowing). In this embodiment, although the air combustion method is described, the oxygen combustion method (oxygen blowing) may also be used. As the fuel supplied to the gasification furnace 101, for example, carbon-containing solid fuel such as coal is used.

[0013] As shown in FIG. 1, the coal gasification combined cycle power generation facility (gasification combined cycle power generation facility) 10 includes a coal feeding facility 11, a gasification furnace 101, a char recovery facility 15, a gas purification facility 16, a gas turbine 17, a steam turbine 18, a generator 19, and a heat recovery steam generator (HRSG) 20.

[0014] In the coal feeding facility 11, coal, which is carbon-containing solid fuel as raw coal, is supplied, and pulverized coal in fine particle form is produced by pulverizing the coal with a coal mill (not shown). 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 the inert gas for conveyance supplied from the air separation facility 42 described later, and is supplied toward the gasification furnace 101. The inert gas is an inert gas with an oxygen content of about 5% by volume or less, and typical examples include nitrogen gas, carbon dioxide gas, and argon gas, but it is not necessarily limited to about 5% by volume or less.

[0015] The gasification furnace 101 is supplied with the pulverized coal produced in the coal feeding facility 11, and is also supplied with char (unreacted portion and ash of coal) recovered in the char recovery facility 15 for the purpose of reusing it as energy.

[0016] In addition, a compressed air supply line 41 from the gas turbine 17 (compressor 61) is connected to the gasifier 101, and a part of the compressed air compressed by the gas turbine 17 can be pressurized to a predetermined pressure by a booster 68 and supplied to the gasifier 101. The air separation facility 42 separates and produces nitrogen and oxygen from the air in the atmosphere. After the air separation facility 42 and the coal supply line 11a from the coal supply facility 11 are connected by the first nitrogen supply line 43, it is connected to the gasifier 101 as a fuel supply line 12. Further, a second nitrogen supply line 45 branched from the first nitrogen supply line 43 is also connected to the char return line 46 from the char recovery facility 15 and then connected to the gasifier 101 as a char supply line 13. Furthermore, the air separation facility 42 is connected to the compressed air supply line 41 by an oxygen supply line 47. The nitrogen separated by the air separation facility 42 is utilized as a gas for transporting coal and char by flowing through the first nitrogen supply line 43 and the second nitrogen supply line 45. Also, the oxygen separated by the air separation facility 42 is utilized as an oxidant (air, oxygen) in the gasifier 101 by flowing through the oxygen supply line 47 and the compressed air supply line 41.

[0017] The gasifier 101 is configured in a two-stage entrained flow bed type, for example, and coal (pulverized coal) and char supplied therein are gasified by partial combustion with an oxidant (air, oxygen) to produce a product gas. The gasifier 101 is provided with a foreign matter removal facility 48 for discharging coal, ash (coal ash), etc. to the outside. A first product gas line 49 for supplying the product gas to the char recovery facility 15 is connected to the gasifier 101, and the product gas containing char can be discharged. In this case, a syngas cooler (gas cooler) (not shown) may be provided in the first product gas line 49 to cool the product gas to a predetermined temperature and then supply it to the char recovery facility 15.

[0018] The char recovery facility 15 includes a dust collector 51 and a supply hopper 52. In this case, the dust collector 51 is composed of one or more cyclones or porous filters, and can separate the char contained in the product gas generated in the gasification furnace 101. Then, the product gas from which the char has been separated is sent to the gas purification facility 16 through the second product gas line 53. The supply hopper 52 recovers the char separated from the product gas by the dust collector 51. Note that a bin may be arranged between the dust collector 51 and the supply hopper 52, and a plurality of supply hoppers 52 may be connected to this bin. And the char return line 46 from the supply hopper 52 is connected to the second nitrogen supply line 45.

[0019] The gas purification facility 16 purifies the product gas from which the char has been separated by the char recovery facility 15 by removing impurities such as sulfur compounds and nitrogen compounds. Then, the gas purification facility 16 purifies the product gas to produce fuel gas and supplies this to the gas turbine 17. Note that since the product gas from which the char has been separated contains sulfur compounds (such as H2S), in the gas purification facility 16, the sulfur compounds are removed and recovered by an amine absorption liquid or the like and effectively utilized as gypsum or the like.

[0020] 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 rotating shaft 64. A compressed air supply line 65 from the compressor 61 is connected to the combustor 62, a fuel gas supply line 66 from the gas purification facility 16 is connected, and a combustion gas supply line 67 extending toward the turbine 63 is connected. Also, the gas turbine 17 is provided with a compressed air supply line 41 extending from the compressor 61 to the gasification furnace 101, and a booster 68 is provided in the middle. Therefore, in the combustor 62, a combustion gas is generated by mixing and burning 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, and the generated combustion gas is supplied toward the turbine 63. Then, the turbine 63 rotationally drives the generator 19 by rotating the rotating shaft 64 with the supplied combustion gas.

[0021] The steam turbine 18 includes a turbine 69 connected to the rotating shaft 64 of the gas turbine 17, and the generator 19 is connected to the base end portion of this rotating shaft 64. Note that the steam turbine 18 and the gas turbine 17 do not necessarily rotate and drive one generator 19 as the same axis, and may rotate and drive a plurality of generators as separate axes. The exhaust heat recovery boiler 20 has an exhaust gas line 70 from the gas turbine 17 (turbine 63) connected thereto, and generates steam by performing heat exchange between the feed water to the exhaust heat recovery boiler 20 and the exhaust gas of the turbine 63.

[0022] And, the exhaust heat recovery boiler 20 is provided with a steam supply line 71 and a feed water line 72 between the turbine 69 of the steam turbine 18, and a condenser 73 is provided in the feed water line 72. Further, the steam generated in the exhaust heat recovery boiler 20 may include steam generated by heat exchange with the produced gas in the syngas cooler (not shown) 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 generator 19 is rotationally driven by rotating the rotating shaft 64. And, an exhaust gas purification facility 74 is provided from the outlet of the exhaust heat recovery boiler 20 to the chimney 75.

[0023] Here, the operation of the coal gasification combined power generation facility 10 of the present embodiment will be described.

[0024] In the coal gasification combined power generation facility 10 of the present embodiment, when raw coal (coal) is supplied to the coal feeding facility 11, the coal is pulverized into fine particles in the coal feeding facility 11 to become pulverized coal. The pulverized coal produced in the coal feeding facility 11 is supplied to the gasification furnace 101 through the fuel supply line 12 by nitrogen flowing through the first nitrogen supply line 43 from the air separation facility 42.

[0025] Further, the char recovered by the char recovery facility 15 described later is supplied to the gasifier 101 through the char supply line 13 by nitrogen supplied from the air separation facility 42 through the second nitrogen supply line 45. Further, the compressed air extracted from the gas turbine 17 described later is pressurized by the booster 68 and then supplied to the gasifier 101 through the compressed air supply line 41 together with oxygen supplied from the air separation facility 42.

[0026] In the gasifier 101, the supplied pulverized coal and char are burned by compressed air (oxygen), and the pulverized coal and char are gasified to generate a product gas. Then, this product gas is discharged from the gasifier 101 through the first product gas line 49 and sent to the char recovery facility 15.

[0027] In this char recovery facility 15, the product gas is first supplied to the dust collector 51, and the particulate char contained in the product gas is separated. Then, the product gas from which the char has been separated is sent to the gas purification facility 16 through the second product gas line 53. On the other hand, the particulate char separated from the product gas is deposited in the supply hopper 52 and returned to the gasifier 101 through the char return line 46 for recycling.

[0028] The product gas from which the char has been separated by the char recovery facility 15 is gas-purified in the gas purification facility 16 by removing impurities such as sulfur compounds and nitrogen compounds to produce fuel gas. The compressor 61 generates compressed air and supplies it to the combustor 62. This combustor 62 burns the compressed air supplied from the compressor 61 and the fuel gas supplied from the gas purification facility 16 to generate combustion gas. By rotating the turbine 63 with this combustion gas, the compressor 61 and the generator 19 are rotationally driven through the rotating shaft 64. In this way, the gas turbine 17 can generate electricity.

[0029] Then, the exhaust heat recovery boiler 20 performs heat exchange between the exhaust gas discharged from the turbine 63 in the gas turbine 17 and the feed water to the exhaust heat recovery boiler 20 to generate steam, and supplies the generated steam to the steam turbine 18. In the steam turbine 18, the turbine 69 is rotationally driven by the steam supplied from the exhaust heat recovery boiler 20, so that the generator 19 can be rotationally driven via the rotating shaft 64 to generate electricity. Note that the gas turbine 17 and the steam turbine 18 do not have to rotationally drive one generator 19 as the same axis, and may rotationally drive a plurality of generators as separate axes.

[0030] Thereafter, in the exhaust 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 discharged into the atmosphere from the chimney 75.

[0031] <Char recovery facility 15A (15) of the first embodiment> As described above, the char recovery facility 15 includes a dust collector 51 configured to separate char from the product gas, and a supply hopper 52 to which the separated char is supplied. The dust collector 51 is an example of the "particle recovery facility" of the present disclosure, the char is an example of the "particle" of the present disclosure, and the product gas is an example of the "gas" of the present disclosure. Hereinafter, the char recovery facility 15A (15) of the first embodiment will be described with reference to FIG. 2.

[0032] The char recovery facility 15A (15) includes a dust collector 51A (51). The dust collector 51A is provided with a pressure vessel 82 including a cyclone housing chamber 81, and a cyclone 80A (80) is housed in the cyclone housing chamber 81. The cyclone 80A (80) is configured to separate char from the product gas by swirling the product gas containing char. The separated char is discharged downward from the cyclone 80A, and the product gas is discharged upward from the cyclone 80A.

[0033] The pressure vessel 82 illustrated in FIG. 2 is an integral container including a recovery chamber 83 for recovering char and the above-described cyclone accommodation chamber 81. More specifically, the pressure vessel 82 includes an upper container 821 defining the cyclone accommodation chamber 81 and a lower container 823 defining the recovery chamber 83, and the upper container 821 and the lower container 823 are integrally configured with each other. The upper container 821 is formed in a cylindrical shape extending in the vertical direction. The lower container 823 has a shoulder portion 826 connected to the lower end portion 821d of the upper container 821 and a lower main body portion 827 located below the shoulder portion 826. The shoulder portion 826 is formed in a cylindrical shape with an inner diameter increasing downward. The lower main body portion 827 is longer than the shoulder portion 826 in the vertical direction.

[0034] The dust collection device 51A includes a filter 85 configured to capture char remaining in the product gas discharged upward from the cyclone 80A. The filter 85 is accommodated in a filter container 39, and a gas delivery line 88 is connected between the filter container 39 and the cyclone 80A. The product gas discharged from the cyclone 80A flows into the filter container 39 via the gas delivery line 88. The flowed-in product gas passes through the filter 85 and is discharged to the above-described second product gas line 53.

[0035] The dust collection device 51A includes a delivery line 110 configured to guide the char captured by the filter 85 toward the recovery chamber 83. The delivery line 110 connects the filter container 39 and the lower container 823.

[0036] Furthermore, the char recovery facility 15A further includes a first communication pipe 91 that communicates the recovery chamber 83 and the cyclone accommodation chamber 81. A first communication on-off valve 141 is disposed in the first communication pipe 91 extending along the vertical direction. The first communication pipe 91 includes a first connection port 31 connected to the recovery chamber 83 and a third connection port 33 connected to the cyclone accommodation chamber 81. In the example of FIG. 2, the first connection port 31 is connected to the shoulder portion 826, and the third connection port 33 is connected to the upper container 821.

[0037] The principle by which the dust collecting device 51A recovers char from the generated gas is as follows. The generated gas flowing through the first generated gas line 49 (see FIG. 1) flows into the cyclone 80A (arrow A in FIG. 2). As the generated gas containing char swirls in the cyclone 80A, the char is separated from the generated gas. The separated char is discharged downward from the cyclone 80A and flows toward the lower container 823. Thereby, the char is recovered in the recovery chamber 83.

[0038] On the other hand, the generated gas discharged upward from the cyclone 80A flows into the filter container 39 via the gas delivery line 88. As the generated gas passes through the filter 85, the filter 85 captures the char remaining in the generated gas. The captured char flows from the filter container 39 into the recovery chamber 83 via the delivery line 110. Thereby, the char flowing through the delivery line 110 is recovered in the recovery chamber 83. The generated gas that has passed through the filter 85 is discharged into the second generated gas line 53 and flows into the gas purification facility 16 (see FIG. 1).

[0039] According to the above configuration, when the char captured by the filter 85 flows into the recovery chamber 83 via the delivery line 110, the gas containing particles in the recovery chamber 83 is pushed out to the first connection port 31 of the first communication pipe 91 and flows through the first communication pipe 91 (arrow B). Then, since the gas containing particles flows into the cyclone housing chamber 81 from the third connection port 33 of the first communication pipe 91, it is possible to suppress the char in the recovery chamber 83 from flowing to the filter 85. Since the amount of char captured by the filter 85 can be reduced, a char recovery facility 15A (15) with an extended filter 85 life is realized. Note that the present disclosure is not limited to the pressure vessel 82 being an integral container. The pressure vessel 82 including the cyclone housing chamber 81 and a recovery container (not shown) including the recovery chamber 83 may be configured separately from each other. In this case, the pressure vessel 82 and the recovery container may be connected by piping. Furthermore, the shape of the recovery container may be different from the shape of the lower container 823 described above, and the recovery container may not include components such as the shoulder portion 826. Even in such an embodiment, it is possible to obtain the above technical advantages.

[0040] In the example of FIG. 2, a configuration is adopted in which the pressure vessel 82 is an integral container. According to this configuration, the differential pressure between the cyclone accommodation chamber 81 and the recovery chamber 83 can be reduced. Therefore, when the char flows from the delivery line 110 into the recovery chamber 83, the flow rate of the char in the first communication pipe 91 can be reduced. Thus, the flow rate of the char from the first communication pipe 91 into the cyclone accommodation chamber 81 is reduced, and the scattering of the char in the cyclone accommodation chamber 81 can be suppressed.

[0041]

[0040] Referring to FIG. 2, the configuration of the delivery line 110 will be described in detail. The dust collector 51A further includes a hopper 94 disposed on the delivery line 110. The hopper 94 includes a hopper storage chamber 95 for temporarily storing the char captured by the filter 85. The delivery line 110 includes an upstream delivery line 111 connecting the hopper 94 and the filter container 39, and a downstream delivery line 112 connecting the hopper 94 and the lower container 823. An upstream delivery on-off valve 113 and a downstream delivery on-off valve 114 are respectively disposed on the upstream delivery line 111 and the downstream delivery line 112.

[0042] The char discharged from the filter container 39 flows into the hopper storage chamber 95 via the upstream delivery line 111. After the char is temporarily stored in the hopper storage chamber 95, it flows into the recovery chamber 83 via the downstream delivery line 112. The discharge timing of the char from the hopper storage chamber 95 is determined by the opening and closing timing of the downstream delivery on-off valve 114.

[0043] The dust collector 51A further includes a second communication pipe 92 that communicates the recovery chamber 83 and the hopper storage chamber 95. The second communication pipe 92 includes a second connection port 32 connected to the recovery chamber 83 and a fourth connection port 34 connected to the hopper storage chamber 95. In the example of FIG. 2, the second connection port 32 is connected to the shoulder portion 826, and the fourth connection port 34 is connected to the upper part of the hopper 94. Further, a second communication on-off valve 142 is disposed on the second communication pipe 92. Also, in the example of FIG. 2, the first connection port 31 of the first communication pipe 91 is located above the second connection port 32 of the second communication pipe 92.

[0044] According to the above configuration, when the char flowing through the downstream delivery line 112 flows into the recovery chamber 83, the gas containing the char in the recovery chamber 83 is pushed out not only into the first communication pipe 91 but also into the second communication pipe 92 (arrow C). By pushing the gas into the second communication pipe 92, a significant decrease in pressure in the hopper storage chamber 95 can be suppressed, and the flow of char in the downstream delivery line 112 can be prevented from stagnating. Further, since the first connection port 31 is located above the second connection port 32, the char flowing into the recovery chamber 83 from the second connection port 32 flows downward and is less likely to flow toward the first communication pipe 91. Therefore, the outflow amount of char from the first communication pipe 91 to the cyclone housing chamber 81 can be reduced, and the scattering of char in the cyclone housing chamber 81 can be suppressed. Note that the first connection port 31 may be connected to the upper container 821 instead of the shoulder portion 826, and the second connection port 32 may be connected to the lower main body portion 827 instead of the shoulder portion 826. Even in such an embodiment, it is possible to obtain the above-described technical advantages.

[0045] The configuration of the cyclone 80A (80) will be described in detail. The cyclone 80A includes a body portion 121 extending in the vertical direction and a tapered portion 122 formed such that the inner diameter decreases downward. The body portion 121 is configured to swirl the generated gas. The tapered portion 122 extends downward from the lower end portion 121d of the body portion 121. The char swirling in the body portion 121 is discharged downward from the lower end portion 121d of the tapered portion 122, and the discharged flow of char may include a swirling component.

[0046] In the example of FIG. 2, the third connection port 33 of the first communication pipe 91 is located above the lower end portion 122d of the tapered portion 122. As a more specific example, the third connection port 33 is located above the lower end portion 122d of the tapered portion 122 and below the lower end portion 121d of the body portion 121. According to the above configuration, it is possible to suppress the flow of char flowing out from the third connection port 33 into the recovery chamber 83 from being disturbed by the flow of char discharged downward from the cyclone 80A. Therefore, char can flow out from the third connection port 33 smoothly. Note that the third connection port 33 may be located above the lower end portion 121d of the body portion 121. Even in such an embodiment, it is possible to obtain the above technical advantages.

[0047] As shown in FIG. 2, the dust collector 51A further includes a turning prevention portion 135 that extends from the inner peripheral surface 132 of the pressure vessel 82 toward the center side of the pressure vessel 82. The turning prevention portion 135 in this example extends from the inner peripheral surface 132 of the upper container 821 toward the center side and the lower side of the pressure vessel 82, and is inclined with respect to the vertical direction. The turning base end portion 136, which is the base end portion of the turning prevention portion 135, is located below the lower end portion (lower end portion 122d in the example of FIG. 2) of the cyclone 80A. Further, the turning prevention portion 135 partitions the cyclone housing chamber 81 and the recovery chamber 83. According to the above configuration, the swirling flow of char discharged downward from the cyclone 80A is weakened by the turning prevention portion 135, so that the scattering of char in the recovery chamber 83 can be suppressed.

[0048] The turning prevention portion 135 includes a turning base end portion 136 that is connected to the inner peripheral surface 132, and the third connection port 33 of the first communication pipe 91 is located above the turning base end portion 136. According to the above configuration, the flow of char flowing out from the third connection port 33 into the cyclone housing chamber 81 is weakened by the turning prevention portion 135, so that the scattering of char in the recovery chamber 83 can be suppressed.

[0049] Furthermore, the first connection port 31 of the first communication pipe 91 is located below the swivel base end portion 136. According to the above configuration, since the scattering of char in the recovery chamber 83 is suppressed by the anti-rotation portion 135, the flow rate of the char pushed out to the first connection port 31 below the anti-rotation portion 135 is reduced. Therefore, the flow rate of char in the first communication pipe 91 is reduced, and the flow rate of char from the third connection port 33 to the cyclone housing chamber 81 can be reduced.

[0050] Continue with the description of the configuration of the char recovery facility 15A. The char recovery facility 15A further includes a char discharge line 96 for discharging the char stored in the recovery chamber 83 to the supply hopper 52 described above, a first return line 21 connected to the supply hopper 52 and the lower container 823, and a second return line 22 connected to the supply hopper 52 and the gas delivery line 88.

[0051] When char flows from the char discharge line 96 into the supply hopper 52, the gas in the supply hopper 52 flows through the first return line 21 or the second return line 22. The gas flowing through the first return line 21 flows into the lower container 823, and the gas flowing through the second return line 22 flows into the gas delivery line 88. Since gas flows through the first return line 21 and the second return line 22 according to the volume of the char flowing through the char discharge line 96, it is possible to suppress the stagnation of the flow of char in the char discharge line 96.

[0052] <Char Recovery Facility 15B (15) of the Second Embodiment> Referring to FIG. 3, the char recovery facility 15B (15) of the second embodiment will be described. Among the components shown in FIG. 3, those that are the same as the components of the char recovery facility 15A (see FIG. 2) are given the same reference numerals. The description of these components may be omitted or dispensed with hereinafter.

[0053] The dust collector 51B (51) of the char recovery facility 15B (15) includes a cyclone 80B (80). The cyclone 80B further includes a cylindrical extension portion 124 in addition to the body portion 121 and the tapered portion 122. The cylindrical extension portion 124 extends downward from the lower end portion 122d of the tapered portion 122. The inner diameter of the cylindrical extension portion 124 is substantially the same as the inner diameter at the lower end portion 122d of the tapered portion 122. The cylindrical extension portion 124 is longer in the vertical direction than the tapered portion 122. In the example of FIG. 3, the lower end portion of the cylindrical extension portion 124 is located above the lower end portion 821d of the upper container 821. Further, the char recovery facility 15B does not include a turning prevention portion 135 (see FIG. 2).

[0054] In the example of FIG. 3, the char separated from the generated gas in the body portion 121 passes through the tapered portion 122 and the cylindrical extension portion 124 in sequence and is discharged downward. According to the above configuration, in the process of the char swirling in the body portion 121 flowing through the cylindrical extension portion 124, the swirling flow of the char is weakened. Thereby, the scattering of the char in the recovery chamber 83 can be suppressed. That is, instead of the turning prevention portion 135 (see FIG. 2), the cylindrical extension portion 124 functions to weaken the swirling flow of the char.

[0055] <Char Recovery Facility 15C (15) of the Third Embodiment> Referring to FIG. 4, the char recovery facility 15C (15) of the third embodiment will be described. Among the components shown in FIG. 4, the same components as those of the char recovery facility 15A (see FIG. 2) are given the same reference numerals. The description of these components may be omitted or dispensed with below. The char recovery facility 15C does not include a turning prevention portion 135 (see FIG. 2). In the dust collector 51C (51) of the char recovery facility 15C (15), the third connection port 33 is located above the vertical center of the upper container 821.

[0056] The dust collector 51C (51) includes a level sensor 99 for measuring the storage amount of char in the hopper storage chamber 95. The level sensor 99 is configured to switch an output signal when the storage amount of char in the hopper storage chamber 95 exceeds a threshold value.

[0057] In addition, the char recovery facility 15C is provided with a controller 90. The controller 90 is configured to open and close the downstream delivery on-off valve 114. The controller 90 determines whether or not the storage amount exceeds a threshold value based on the output signal of the level sensor 99. Then, at the timing when the output signal of the level sensor 99 switches, the controller 90 sends a command for switching from the closed state to the open state to the downstream delivery on-off valve 114. Note that the opening and closing control of the downstream delivery on-off valve 114 executed by the controller 90 that monitors the level sensor 99 can be executed without any problem in the char recovery facilities 15A and 15B shown in FIGS. 2 and 3.

[0058] According to the above configuration, every time the storage amount of char in the hopper 94 exceeds the threshold value, the downstream delivery on-off valve 114 switches from the closed state to the open state, and the char flows from the delivery line 110 into the recovery chamber 83. Since the fluid in the recovery chamber 83 is pushed out into the first communication pipe 91 and the second communication pipe 92 according to the inflow volume of the char (arrows B and C), it is possible to suppress the stagnation of the flow of char in the delivery line 110.

[0059] Note that the controller 90 is constituted by a computer and includes a processor, a memory (storage medium), and an external communication interface. The processor is a CPU, GPU, MPU, DSP, or a combination thereof. The processor according to other embodiments may be realized by an integrated circuit such as a PLD, ASIC, FPGA, or MCU. The memory is configured to temporarily or non-temporarily store various data, and is realized by, for example, at least one of RAM, ROM, or flash memory. According to the program instructions loaded into the memory, the processor executes various control processes.

[0060] <Other Modifications> The "particle recovery facility" of the present disclosure is not limited to the char recovery facility 15 applied to the coal gasification combined power generation facility 10. The "particle recovery facility" may be applied to a waste melting facility or a gasification furnace facility for chemical products. Chemical products are substances obtained through chemical synthesis or articles obtained from such substances, such as medicines, paints, solvents, or chemical fibers. Therefore, the "particles" of the present disclosure are not limited to char, and the "gas" of the present disclosure is not limited to product gas.

[0061] <Summary> The content described in several of the above embodiments can be understood as follows, for example.

[0062] 1) The particle recovery facility (for example, the dust collector 51) according to at least one embodiment of the present disclosure is configured to separate the particles (for example, char) from the gas (for example, product gas) by swirling the gas containing the particles (for example, char), and a cyclone (80); a pressure vessel (82) including a cyclone housing chamber (81) for housing the cyclone; a filter (85) configured to capture the particles remaining in the gas discharged upward from the cyclone; a delivery line (110) for guiding the particles captured by the filter toward a recovery chamber (83) for recovering the particles discharged downward from the cyclone; a first communication pipe (91) for communicating the recovery chamber and the cyclone housing chamber; and

[0063] According to the configuration of 1) above, when the particles captured by the filter flow into the recovery chamber via the delivery line, the gas containing the particles flows in the first communication pipe. The particles flowing through the first communication pipe flow into the cyclone housing chamber, so that the particles in the recovery chamber can be prevented from flowing to the filter. Therefore, a particle recovery facility with an extended filter life is realized.

[0064] 2) In some embodiments, the particle recovery facility described in 1) above A hopper disposed on the delivery line, the hopper (94) including a hopper storage chamber (95) for temporarily storing the particles captured by the filter; A second communication pipe (92) for communicating the recovery chamber and the hopper storage chamber; further comprising; The first communication pipe includes a first connection port (31) connected to the recovery chamber; The second communication pipe includes a second connection port (32) connected to the recovery chamber; The first connection port is above the second connection port.

[0065] According to the configuration of 2) above, when particles flow from the hopper into the recovery chamber via the delivery line, the gas containing the particles in the recovery chamber is pushed out not only through the first communication pipe but also through the second communication pipe. By pushing the gas out through the second communication pipe, a significant decrease in pressure in the hopper storage chamber can be suppressed, and the flow of particles in the delivery line can be prevented from stagnating. Furthermore, since the first connection port is above the second connection port, the particles flowing from the delivery line into the recovery chamber are less likely to flow towards the first communication pipe. Therefore, the flow rate of particles from the first communication pipe into the recovery chamber can be reduced, and the scattering of particles in the cyclone housing chamber can be suppressed.

[0066] 3) In some embodiments, the particle recovery facility described in 1) or 2) above, wherein the cyclone is a body portion extending in the vertical direction, the body portion (121) for swirling the gas; a tapered portion (122) connected to the lower end portion (121d) of the body portion and formed such that the inner diameter decreases as it goes downward; including; The first communication pipe includes a third connection port (33) connected to the cyclone housing chamber; The third connection port is above the lower end portion (122d) of the tapered portion.

[0067] According to the configuration of 3) above, it is possible to suppress the flow of particles flowing into the cyclone accommodation chamber from the third connection port from being disturbed by the flow of particles discharged downward from the cyclone. Therefore, the particles can flow out smoothly from the third connection port.

[0068] 4) In some embodiments, it is a particle recovery facility according to any one of 1) to 3) above, The pressure vessel is an integrated vessel including the cyclone accommodation chamber and the recovery chamber.

[0069] According to the configuration of 4) above, the differential pressure between the cyclone accommodation chamber and the recovery chamber can be reduced. Therefore, when the particles flow from the delivery line into the recovery chamber, the flow rate of the particles in the first communication pipe can be reduced. Thus, the flow rate of the particles from the first communication pipe into the cyclone accommodation chamber is reduced, and the scattering of the particles in the cyclone accommodation chamber can be suppressed.

[0070] 5) In some embodiments, the particle recovery facility according to 4) above Further includes a turning prevention portion (135) extending from the inner peripheral surface (132) of the pressure vessel toward the center side of the pressure vessel below the cyclone.

[0071] According to the configuration of 5) above, since the swirling flow of the particles discharged from the cyclone is weakened by the turning prevention portion, the scattering of the particles in the recovery chamber can be suppressed.

[0072] 6) In some embodiments, it is a particle recovery facility according to 5) above The first communication pipe includes a third connection port (33) connected to the cyclone accommodation chamber, The turning prevention portion includes a turning base end portion (136) connected to the inner peripheral surface of the pressure vessel, The position of the third connection port is above the turning base end portion.

[0073] According to the configuration of 6) above, since the flow of particles flowing into the cyclone accommodation chamber from the third connection port is weakened by the swirling prevention portion, the scattering of particles in the recovery chamber can be suppressed.

[0074] 7) In some embodiments, it is the particle recovery facility described in 5) or 6) above, The first communication pipe includes a first connection port (31) connected to the recovery chamber, The swirling prevention portion includes a swirling base end portion (136) connected to the inner peripheral surface of the pressure vessel, The first connection port is below the swirling base end portion.

[0075] According to the configuration of 7) above, since the scattering of char in the recovery chamber is suppressed by the swirling prevention portion, the flow rate of char extruded to the first connection port is reduced. Therefore, the amount of particles in the first communication pipe is reduced, and the flow rate of particles from the first communication pipe to the cyclone accommodation chamber can be reduced.

[0076] 8) In some embodiments, it is the particle recovery facility described in 4) above, The cyclone is A body portion extending in the vertical direction, which is a body portion (121) for swirling the gas, A tapered portion (122) connected to the lower end portion (121d) of the body portion and formed so that the inner diameter becomes smaller as it goes downward, A cylindrical extending portion extending downward from the lower end portion (122d) of the tapered portion, which is a cylindrical extending portion (124) for discharging the particles downward toward the recovery chamber, and includes.

[0077] According to the configuration of 8) above, in the process where the particles swirling in the body portion flow through the cylindrical extending portion, the swirling flow of the particles is weakened. Thereby, the scattering of particles in the recovery chamber can be suppressed.

[0078] 9) In some embodiments, the particle recovery facility described in any one of 1) to 8) above is A hopper disposed on the delivery line, the hopper (94) including a hopper storage chamber (95) for temporarily storing the particles captured by the filter; A delivery on-off valve (downstream delivery on-off valve 114) disposed on the delivery line between the hopper storage chamber and the recovery chamber; A controller (90) configured to send a command to the delivery on-off valve so that the delivery on-off valve switches from the closed state to the open state when the storage amount of the particles in the hopper storage chamber exceeds a threshold value; and further includes.

[0079] According to the configuration of 9) above, every time the storage amount of the particles in the hopper exceeds the threshold value, the delivery on-off valve switches from the closed state to the open state, and the particles flow into the recovery chamber from the delivery line. According to the inflow volume of the particles, the gas in the recovery chamber is pushed out into the first communication pipe, so that it is possible to suppress the stagnation of the particle flow in the delivery line.

Explanation of reference numerals

[0080] 10: Coal gasification combined power generation facility 11: Coal feeding facility 11a: Coal feeding line 12: Fuel supply line 13: Char supply line 15: Char recovery facility 16: Gas purification facility 17: Gas turbine 18: Steam turbine 19: Generator 20: Exhaust heat recovery boiler 21: First return line 22: Second return line 31: First connection port 32: Second connection port 33: Third connection port 34: Fourth connection port 39: Filter container 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 matter removal equipment 49: First generated gas line 51: Dust collector 52: Supply hopper 53: Second generated gas 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: Feed water line 73: Condenser 74: Exhaust gas purification equipment 75: Chimney 80: Cyclone 81: Cyclone housing chamber 82: Pressure vessel 83: Recovery chamber 85: Filter 88: Gas delivery line 90: Controller 91: First communication pipe 92: Second communication pipe 94: Hopper 95: Hopper storage chamber 96: Char discharge line 99: Level sensor 101: Gasifier 110: Delivery line 111: Upstream delivery line 112: Downstream delivery line 113: Upstream delivery on-off valve 114: Downstream delivery on-off valve 121: Body part 121d: Lower end part 122: Tapered part 122d: Lower end part 124: Cylindrical extension part 132: Inner peripheral surface 135: Anti-rotation part 136: Rotation base end part 141: First communication on-off valve 142: Second communication on-off valve 821: Upper container 821d: Lower end part 823: Lower container 826: Shoulder part 827: Lower main body part

Claims

1. A cyclone configured to separate the particles from the gas by swirling the gas containing the particles, A pressure vessel including a cyclone housing chamber for housing the cyclone, A filter configured to capture the particles remaining in the gas discharged upward from the cyclone, A delivery line for guiding the particles captured by the filter toward a recovery chamber for recovering the particles discharged downward from the cyclone, A first communication pipe for communicating the recovery chamber and the cyclone housing chamber, A particle recovery facility comprising the above.

2. A hopper disposed on the delivery line, the hopper including a hopper storage chamber for temporarily storing the particles captured by the filter, A second communication pipe for communicating the recovery chamber and the hopper storage chamber Further comprising, The first communication pipe includes a first connection port connected to the recovery chamber, The second communication pipe includes a second connection port connected to the recovery chamber, The first connection port is above the second connection port The particle recovery facility according to Claim 1.

3. The cyclone is, A body portion extending in the vertical direction, the body portion for swirling the gas, A tapered portion connected to the lower end of the body portion and formed so that the inner diameter decreases as it goes downward, Including, The first communication pipe includes a third connection port connected to the cyclone housing chamber, The third connection port is above the lower end of the tapered portion The particle recovery facility according to Claim 1 or 2.

4. The pressure vessel is an integral container including the cyclone housing chamber and the recovery chamber The particle recovery facility according to Claim 1 or 2.

5. Further comprising a swirl prevention portion extending from the inner peripheral surface of the pressure vessel toward the center side of the pressure vessel below the cyclone, The particle recovery facility according to Claim 4.

6. The first communication pipe includes a third connection port connected to the cyclone housing chamber, The swirl prevention portion includes a swirl base end portion connected to the inner peripheral surface of the pressure vessel, The position of the third connection port is above the swirl base end portion The particle recovery facility according to Claim 5.

7. The first communication pipe includes a first connection port connected to the recovery chamber, The swirl prevention portion includes a swirl base end portion connected to the inner peripheral surface of the pressure vessel, The first connection port is below the swirl base end portion The particle recovery facility according to Claim 5. Claim 8 The cyclone is a body portion extending in the vertical direction, the body portion for swirling the gas, a tapered portion connected to the lower end portion of the body portion and formed such that the inner diameter decreases as it goes downward, a cylindrical extension portion extending downward from the lower end portion of the tapered portion, the cylindrical extension portion for discharging the particles downward toward the recovery chamber, The particle recovery facility according to claim 4, comprising: Claim 9 A hopper disposed on the delivery line, the hopper including a hopper storage chamber for temporarily storing the particles captured by the filter, a delivery on-off valve disposed on the delivery line between the hopper storage chamber and the recovery chamber, a controller configured to send a command to the delivery on-off valve so that the delivery on-off valve switches from a closed state to an open state when the storage amount of the particles in the hopper storage chamber exceeds a threshold value, further comprising The particle recovery facility according to claim 1 or 2.

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