US20160257895A1 - Slag discharge apparatus and slag discharge method - Google Patents

Slag discharge apparatus and slag discharge method Download PDF

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Publication number
US20160257895A1
US20160257895A1 US15/032,151 US201415032151A US2016257895A1 US 20160257895 A1 US20160257895 A1 US 20160257895A1 US 201415032151 A US201415032151 A US 201415032151A US 2016257895 A1 US2016257895 A1 US 2016257895A1
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US
United States
Prior art keywords
slag
screen
top face
openings
accumulated
Prior art date
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Abandoned
Application number
US15/032,151
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English (en)
Inventor
Yasuo Soda
Yasuyuki Miyata
Yoshinori Koyama
Yasunari Shibata
Haruto Shinoda
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Mitsubishi Power Ltd
Original Assignee
Mitsubishi Hitachi Power Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Assigned to MITSUBISHI HITACHI POWER SYSTEMS, LTD. reassignment MITSUBISHI HITACHI POWER SYSTEMS, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOYAMA, YOSHINORI, MIYATA, YASUYUKI, SHIBATA, YASUNARI, SHINODA, Haruto, SODA, YASUO
Publication of US20160257895A1 publication Critical patent/US20160257895A1/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C10J3/52—Ash-removing devices
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C10J3/52—Ash-removing devices
    • C10J3/523—Ash-removing devices for gasifiers with stationary fluidised bed
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C10J3/52—Ash-removing devices
    • C10J3/526—Ash-removing devices for entrained flow gasifiers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/82—Gas withdrawal means
    • C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/1625—Integration of gasification processes with another plant or parts within the plant with solids treatment
    • C10J2300/1628—Ash post-treatment
    • C10J2300/1634—Ash vitrification
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
    • C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
    • C10K1/101—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids with water only

Definitions

  • the present invention relates to a slag discharge apparatus and a slag discharge method.
  • An ash hopper in which slag (molten slag) produced in and falling from a combustor is collected, is provided in a lower portion of a gasifier which gasifies a carbonaceous feedstock such as coal (PTLs 1 and 2).
  • a slag crusher which includes a screen and a spreader is provided in the ash hopper.
  • the slag falling from the combustor is rapidly cooled by water so as to be solidified, and falls on a top face of the screen included in the slag crusher.
  • the screen is provided transversely with respect to the fall direction of the slag and includes a plurality of openings. Accordingly, slag pieces which are smaller than diameters of the openings pass through the screen, and fall to the lower portion of the ash hopper.
  • slag pieces which are larger than the diameters of the openings or a slag lump which is an accumulation of the slag pieces which are smaller than the diameters of the openings are accumulated on the top face of the screen.
  • slag pieces are combined by a friction force in particle layers or cross-linking due to powder pressure.
  • the spreader provided on the top face of the screen is moved along the top face of the screen by a hydraulic cylinder, and the spreader crushes the slag by applying the slag accumulated on the top face of the screen so as to allow the slag to pass through the screen.
  • the slag which falls from the openings of the screen to the lower portion of the ash hopper and is accumulated, is discharged from the gasifier out of a system via a lock hopper.
  • the accumulated slag may be not crushed, and the slag may not pass through the screen by only collecting the slag in the operating direction of the slag crusher.
  • an accumulation amount of the slag on the top face of the screen increases, the slag may not be discharged from the gasifier, and the inner portion of the ash hopper may be filled with the slag. In this case, the operation of the gasifier cannot be continued, and the gasifier is stopped.
  • the present invention is made in consideration of the above-described circumstances, and an object thereof is to provide a slag discharge apparatus and a slag discharge method capable of allowing the slag accumulated on the top face of the screen more easily to pass through the openings of the screen.
  • a slag discharge apparatus and a slag discharge method of the present invention adopt the following means.
  • a slag discharge apparatus which is provided on a combustor of a gasifier gasifying a carbonaceous feedstock and discharges slag produced in and falling from the combustor out of the gasifier, comprising: a screen which is provided transversely with respect to the fall direction of the slag and has a plurality of openings to allow slag pieces which are smaller than diameters of the openings to pass through the screen; crushing means moving along a top face of the screen to crush the slag accumulated on the top face of the screen; and a spouting hole which spouts pressurized liquid onto the slag accumulated on the screen.
  • the slag discharge apparatus is provided on a combustor of a gasifier gasifying the carbonaceous feedstock and discharges slag produced in and falling from the combustor out of the gasifier.
  • the slag discharge apparatus includes the screen which is provided transversely with respect to the fall direction of the slag and has the plurality of openings.
  • the slag pieces which are smaller than the diameters of the openings of the screen, pass through the openings so as to fall. Meanwhile, the slag, which does not pass through the openings and is accumulated on the top face of the screen, is crushed by the crushing means moving along the top face of the screen.
  • the slag which is accumulated on the top face of the screen include a slag lump in which slag pieces smaller than the diameters of the openings are combined by a friction force or cross-linking due to powder pressure.
  • the pressurized liquid is spouted from the spouting hole onto the slag accumulated on the top face of the screen.
  • the combination due to the cross-linking is cut by spouting the pressurized liquid onto particles of the slag which are combined by the cross-linking. Accordingly, the slag is gently fluidized from a stationary state.
  • the liquid spouted onto the slag is water.
  • the slag which is easily fluidized is made to flow by the liquid spouted from the spouting hole. Accordingly, the slag falls along with the liquid from the openings of the screen without moving the crush means. In addition, the slag easily falls from the openings by moving the crushing means.
  • the slag accumulated on the top face of the screen can easily be passed through the openings of the screen.
  • the spouting hole is provided on a side wall of the screen which is erected in parallel with respect to an operating direction of the crushing means.
  • the spouting hole is provided in the crushing means.
  • the pressurized liquid is more reliably spouted onto the slag crushed by the crushing means, it is possible to reliably crush the accumulated slag.
  • the crushing means includes an inclined surface which is inclined forward with respect to a crushing direction of the slag.
  • the spouting hole is provided on the inclined surface, and spouts the liquid in the direction of the screen.
  • the spouting hole is provided in the screen.
  • the present configuration it is possible to prevent the slag from being accumulated on the top face of the screen, and it is possible to easily and uniformly spout the pressurized liquid onto the accumulated slag.
  • the spouting hole spouts gas instead of the liquid.
  • a slag discharge method of using a slag discharge apparatus which is provided on a combustor of a gasifier gasifying a carbonaceous feedstock and discharges slag produced in and falling from the combustor out of the gasifier, comprising: a first step of spouting pressurized liquid from a spouting hole onto slag accumulated on a top face of a screen which is provided transversely with respect to the fall direction of the slag and has a plurality of openings; and a second step of moving crushing means for crushing the slag accumulated on the top face of the screen along the top face of the screen.
  • FIG. 1 is a longitudinal section view of a gasifier according to a first embodiment of the present invention.
  • FIG. 2 is a longitudinal section view of a slag crusher according to the first embodiment of the present invention.
  • FIG. 3 is a front view of a spreader according to the first embodiment of the present invention.
  • FIG. 4 is a longitudinal sectional view when a spreader according to a second embodiment of the present invention is viewed from a side.
  • FIG. 5 is a longitudinal sectional view when the spreader according to the second embodiment of the present invention is viewed from a front side.
  • FIG. 6 is a longitudinal section view of a screen according to a third embodiment of the present invention.
  • FIG. 7 is a longitudinal section view of a screen according to a modification example of the third embodiment of the present invention.
  • FIG. 8 is a longitudinal section view of a screen according to a fourth embodiment of the present invention.
  • FIG. 9 is a longitudinal section view of a screen according to a modification example of the fourth embodiment of the present invention.
  • FIG. 10 is a top view of a slag crusher according to a fifth embodiment of the present invention.
  • FIG. 11 is a longitudinal section view of a screen and a side wall according to the fifth embodiment of the present invention.
  • FIG. 1 is a longitudinal section view of a gasifier 10 according to the first embodiment.
  • wastes such as waste tires or plastics in addition to heavy fuels such as coal, petroleum coke, coal coke, asphalt, pitch, or oil shale.
  • heavy fuels such as coal, petroleum coke, coal coke, asphalt, pitch, or oil shale.
  • pulverized coal which is supplied from a coal supply device (not shown) and char which is recovered by dedusting device (not shown) react with an oxidizing agent in a combustor 12 under a high temperature atmosphere of approximately 1500° C. to 1800° C. which is an ash melting point or more. Accordingly, when the pulverized coal is combusted at a high temperature in the combustor 12 , coal gas which is combustible gas is generated, and slag 14 in which ash in the pulverized coal is melted is generated.
  • the high-temperature coal gas obtained by the high temperature combustion in the combustor 12 flows into a reductor 16 which is provided on the upper stage of the combustor 12 .
  • the pulverized coal and the char are also supplied to the reductor 16 , the supplied pulverized coal and char are further gasified, and coal gas which is combustible gas is generated.
  • the combustor 12 according to the first embodiment is an entrained bed type combustor.
  • the combustor 12 is not limited to this, and may be a fluidized bed type combustor or a fixed bed type combustor.
  • An ash hopper 18 which collects the slag 14 produced in and falling from the combustor 12 , is provided in the lower portion of the gasifier 10 .
  • the ash hopper 18 is provided with a slag crusher 20 which crushes the slag 14 and discharges the slag out of the gasifier 10 .
  • FIG. 2 is a longitudinal section view showing a configuration of the slag crusher 20 according to the first embodiment.
  • the slag crusher 20 is provided with a screen 22 , a spreader 24 , and a nozzle 26 .
  • the slag 14 falling from the combustor 12 is rapidly cooled by water (hereinafter, referred to as “ash hopper water”) which is spouted from an ash hopper water-supply pipe 28 so as to be solidified, and the solidified slag falls to the top face of the screen 22 provided in the slag crusher 20 .
  • ash hopper water water
  • the screen 22 with a plurality of openings 30 is provided transversely with respect to the fall direction of the slag 14 , and slag pieces 14 which are smaller than diameters of the openings 30 pass through the screen.
  • the screen 22 is a plate-shaped member which includes the openings 30 .
  • the slag 14 passing through the openings 30 falls to the lower portion of the ash hopper 18 along with the ash hopper water.
  • a lock hopper 34 is connected to the lower portion of the ash hopper 18 , and the slag 14 falling to the lower portion of the ash hopper 18 is discharged out of the system via the lock hopper 34 .
  • the gasifier 10 of FIG. 1 adopts a gravity falling method in which the slag 14 is discharged out of the system by making the slag 14 fall to the lock hopper 34 .
  • the present invention is not limited to this, and a horizontal suction method may be adopted in which the slag 14 is extracted so as to be reused without causing the slag 14 to fall to the lock hopper 34 .
  • the spreader 24 is moved along the top face of the screen 22 by the hydraulic cylinder 36 , and crushes the slag 14 accumulated on the top face of the screen 22 .
  • the position of the spreader 24 shown in FIG. 2 is a standby position before the spreader moves along the top face of the screen 22 .
  • a receiving plate 38 is provided on a side opposite to the standby position of the spreader 24 . That is, the spreader 24 moves from the standby position to the receiving plate 38 , and the slag 14 accumulated on the top face of the screen 22 is collected. In addition, the slag 14 is interposed between the spreader 24 and the receiving plate 38 , and the accumulated slag 14 is crushed. In addition, protrusion portions 40 are provided on a front surface of the spreader 24 so as to easily crush the slag 14 .
  • the spreader 24 is provided with an inclined surface 24 A which is inclined forward with respect to the crushing direction of the slag 14 .
  • the inclined surface 24 A is provided on the lower portion of the spreader 24 .
  • the spreader 24 collects the accumulated slag 14 mainly by the inclined surface 24 A.
  • the portion above the inclined surface 24 A becomes a perpendicular surface 24 B perpendicular to the screen 22 .
  • the nozzle 26 is a spouting hole which spouts pressurized liquid onto the slag 14 accumulated on the screen 22 .
  • the nozzle 26 according to the first embodiment is provided on the inclined surface 24 A of the spreader 24 . As shown in a front view of the spreader 24 of FIG. 3 , for example, the plurality of nozzles 26 are horizontally provided on the inclined surface 24 A.
  • the pressurized liquid which is spouted from the nozzle 26 is water.
  • the pressurized liquid may be liquid which can cut cross-linking of the slag 14 as described below.
  • the pressurized water is referred to as high pressure water.
  • the pressure of the high pressure water is 3 MPa to 5 MPa.
  • a water supply pipe 42 through which the high pressure water is supplied to the ash hopper water-supply pipe 28 , is branched and connected to the nozzle 26 . More specifically, the branched water supply pipe 42 is connected to a high pressure hose 44 .
  • the high pressure hose 44 has flexibility so as to correspond to the movement of the spreader 24 , and is supported by a high pressure hose receiver 46 .
  • the high pressure hose 44 is connected to a high pressure water header 48 .
  • the high pressure water header supplies the plurality of nozzles 26 with the high pressure water.
  • the slag 14 generated in the combustor 12 falls on the top face of the screen 22 .
  • slag pieces 14 which are smaller than the diameters of the openings 30 of the screen 22 pass through the openings 30 , and fall to the lower portion of the ash hopper 18 , that is, the lower portion of the gasifier 10 .
  • slag pieces 14 which are larger than the diameters of the openings 30 , or slag lumps which are accumulations of the slag pieces 14 which are smaller than the diameters of the openings 30 cannot pass through the openings 30 , and are accumulated on the top face of the screen 22 .
  • the spreader 24 moves from the standby position to the receiving plate 38 along the top face of the screen 22 every fixed time interval. Accordingly, the spreader 24 crushes the accumulated slag 14 such that the slag 14 easily passes through the openings 30 .
  • the spreader 24 according to the first embodiment applies a downward force to the accumulated slag 14 using the inclined surface 24 A, the accumulated slag 14 can be more reliably crushed.
  • the slag lumps in which small slag pieces 14 are combined by cross-linking, are not crushed by the spreader 24 , do not pass through the openings 30 , and may be collected in the movement direction of the spreader 24 .
  • the high pressure water is spouted from the nozzles 26 , which are provided on the inclined surface 24 A of the spreader 24 , toward the slag 14 . Since the high pressure water is spouted to the particles of the slag 14 combined by cross-linking, the combination by cross-linking is cut. Accordingly, the slag 14 is gently fluidized from a stationary state.
  • the nozzles 26 are provided on the inclined surface 24 A, the high pressure water is more reliably spouted to the slag 14 which is crushed by the spreader 24 . Accordingly, it is possible more reliably crush the accumulated slag 14 .
  • a time interval of the emission of the high pressure water from the nozzles 26 may be the same as a time interval of the movement of the spreader 24 , or the emission of the high pressure water may be intermittently or continuously performed regardless of the time interval of the movement of the spreader 24 .
  • the slag 14 which is easily fluidized, is made to flow by the high pressure water spouted from the nozzles 26 . Accordingly, the slag 14 falls from the openings 30 of the screen 22 along with the high pressure water without moving the spreader 24 . In addition, the slag 14 easily falls from the openings 30 even by moving spreader 24 .
  • the slag crusher 20 is provided with the screen 22 which is provided transversely with respect to the fall direction of the slag 14 and has the plurality of openings to allow the slag pieces 14 which are smaller than diameters of the openings 30 to pass through the screen, the spreader 24 which moves along the top face of the screen 22 to crush the slag 14 accumulated on the top face of the screen 22 , and the nozzles 26 which spouts the high pressure water onto the slag 14 accumulated on the screen 22 .
  • the slag crusher 20 causes the slag 14 accumulated on the top face of the screen 22 to more easily pass through the openings 30 of the screen 22 . Therefore, even when the slag 14 is accumulated on the top face of the screen 22 , it is possible to more reliably discharge the slag 14 by the slag crusher 20 . As a result, it is possible to prevent the operation of the gasifier 10 from being stopped due to accumulation of the slag 14 , and a continuous operation of the gasifier 10 can be performed.
  • the nozzles 26 are provided on the inclined surface 24 A of the spreader 24 .
  • the present invention is not limited to this, and the nozzles 26 may be provided on the perpendicular surface 24 B of the spreader 24 .
  • FIG. 4 is a longitudinal sectional view when the spreader 24 according to the second embodiment is viewed from a side.
  • FIG. 5 is a longitudinal sectional view when the spreader 24 according to the second embodiment is viewed from a front side, and is a section view taken along A-A in FIG. 4 .
  • the same reference numerals as those of FIGS. 2 and 3 are assigned to the same configuration portions as those of FIGS. 2 and 3 , and descriptions thereof are omitted.
  • the nozzles 26 according to the second embodiment are provided on the inclined surface 24 A, and spouts high pressure water in the direction of the screen 22 .
  • a header 50 is provided in the inner portion of the spreader 24 .
  • the plurality of nozzles 26 facing downward are connected to the header 50 , and the high pressure water is spouted from the nozzles 26 to the top face of the screen 22 .
  • the time interval of the emission of the high pressure water from the nozzles 26 may be the same as the time interval of the movement of the spreader 24 , or the emission of the high pressure water may be intermittently or continuously performed regardless of the time interval of the movement of the spreader 24 .
  • the header 50 may not be provided.
  • the slag crusher 20 since the downward force is applied to the slag 14 , which is crushed by the spreader 24 , by the high pressure water, it is possible to more reliably crush the accumulated slag 14 .
  • nozzles 60 which spouts high pressure water are provided in the screen 22 .
  • FIG. 6 is an example of a longitudinal section view of the screen 22 according to the third embodiment of the present invention.
  • the nozzles 60 to which the high pressure water is supplied via headers 62 , are provided on the side surface of the openings 30 of the screen 22 .
  • the water supply pipe 42 through which the high pressure water is supplied to the ash hopper water-supply pipe 28 , is branched, and is connected to the header 62 .
  • FIG. 7 is a longitudinal section view of the screen according to a modification example of the third embodiment.
  • the nozzles 60 to which the high pressure water is supplied via the headers 62 , are provided on the top face of the screen 22 .
  • time interval of the emission of the high pressure water from the nozzles 60 may be the same as the time interval of the movement of the spreader 24 , or the emission of the high pressure water may be intermittently or continuously performed regardless of the time interval of the movement of the spreader 24 .
  • the slag crusher 20 since the high pressure water is spouted to particles of the slag 14 combined by cross-linking, the combination by the cross-linking is cut. Accordingly, the accumulated slag 14 is easily fluidized.
  • FIGS. 8 and 9 are longitudinal section views of the screen 22 according to the fourth embodiment.
  • the same reference numerals as those of FIGS. 6 and 7 are assigned to the same configuration portions as those of FIGS. 6 and 7 , and descriptions thereof are omitted.
  • high pressure gas (hereinafter, referred to as “high pressure gas”) instead of the high pressure water is spouted from the nozzles 60 . Accordingly, the headers 62 are connected to the high pressure gas supply pipe 42 through which the high pressure gas is supplied.
  • the time interval of the emission of the high pressure gas from the nozzles 60 may be the same as the time interval of the movement of the spreader 24 , or the emission of the high pressure gas may be intermittently or continuously performed regardless of the time interval of the movement of the spreader 24 .
  • the top face of the screen 22 is filled with water.
  • the slag crusher 20 since the gas is spouted from the top face of the screen 22 in the state where the top face of the screen 22 is filled with water, air bubbles of the high pressure gas rise from the top face of the screen 22 . The combination of the slag 14 by cross-linking is cut by the rising of the air bubbles. Accordingly, since the slag 14 is fluidized, the slag 14 accumulated on the top face of the screen 22 more easily passes through the openings 30 of the screen 22 .
  • FIG. 10 is a top view of the slag crusher 20 according to the fifth embodiment.
  • FIG. 11 is a longitudinal section view of the screen 22 and side walls 70 according to the fifth embodiment, and is a sectional view taken along A-A in FIG. 10 .
  • the same reference numerals as those of FIGS. 2 and 3 are assigned to the same configuration portions as those of FIGS. 2 and 3 , and descriptions thereof are omitted.
  • the slag crusher 20 includes nozzles 72 which spout high pressure water at the side walls 70 of the screen 22 which are erected in parallel with respect to the operation direction of the spreader 24 .
  • the nozzles 72 are provided in the lower portions of the side walls 70 .
  • the slag crusher 20 it is possible to easily and uniformly spout the high pressure water to the accumulated slag 14 .
  • the nozzles 72 are provided on the side walls 70 , it is possible to easily install the nozzles 70 on the slag crusher 20 .
  • the high pressure water spouted from the nozzles 72 may be also used as the ash hopper water.
  • the present invention is not limited to this, and an aspect may be adopted in which the spreader 24 is provided instead of the receiving plate 38 and a pair of spreaders 24 moves along the top face of the screen 22 to crush the slag 14 .

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Processing Of Solid Wastes (AREA)
  • Disintegrating Or Milling (AREA)
US15/032,151 2013-11-15 2014-09-10 Slag discharge apparatus and slag discharge method Abandoned US20160257895A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2013-236893 2013-11-15
JP2013236893 2013-11-15
PCT/JP2014/073999 WO2015072219A1 (ja) 2013-11-15 2014-09-10 スラグ排出装置及びスラグ排出方法

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US15/032,151 Abandoned US20160257895A1 (en) 2013-11-15 2014-09-10 Slag discharge apparatus and slag discharge method
US15/523,793 Abandoned US20170342337A1 (en) 2013-11-15 2015-11-12 Slag discharge apparatus and slag discharge method

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US (2) US20160257895A1 (zh)
JP (1) JP2015117373A (zh)
KR (2) KR101813419B1 (zh)
CN (2) CN105658772B (zh)
WO (2) WO2015072219A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108571744A (zh) * 2018-06-15 2018-09-25 江苏国信泗阳生物质发电有限公司 能防止扬尘的锅炉用间歇式出渣控制系统及控制方法
US11286437B2 (en) 2018-02-23 2022-03-29 Mitsubishi Power, Ltd. Slag discharge device, gasifier furnace and integrated gasification combined cycle, and slag discharge method
US12121903B2 (en) 2018-12-21 2024-10-22 Mitsubishi Heavy Industries, Ltd. Slag crusher, gasifier, integrated gasification combined cycle, and assembly method of slag crusher

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