JP2013082830A - Slurry conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slurry conveying device which can convey slurry smoothly by suppressing clogging of a transport pipe with the slurry.SOLUTION: The slurry conveying device is provided with a slurry tank 121 that can store the slurry 205, a slurry piping 122 that conveys the slurry 205 stored in the slurry tank 121, a slurry pump 123 provided for the slurry piping 122, a slurry suction tube 124 provided for the uppermost stream part of the conveyance direction of the slurry 205 in the slurry piping 122, and a first fluid-jetting device 151 that jets slurry water 204 from the outer periphery of the slurry suction tube 124 toward a center side of a suction region A.

Description

  The present invention relates to a slurry conveying apparatus that conveys a slurry, which is a mixture of generated slag and water, for example.

  For example, a combined coal gasification power generation facility is a power generation facility that aims to further increase the efficiency and environmental performance compared to conventional coal-fired power generation by gasifying coal and combining it with combined cycle power generation. This coal gasification combined cycle power generation facility has a great merit that it can use coal with abundant resources, and it is known that the merit can be further increased by expanding the applicable coal types.

  Conventional coal gasification combined power generation facilities generally have a coal supply device, a drying device, a coal gasification furnace, a gas purification device, a gas turbine facility, a steam turbine facility, an exhaust heat recovery boiler, a gas purification device, and the like. ing. Therefore, the coal is dried and then pulverized, supplied to the coal gasifier as pulverized coal, and air is taken in. The coal gas is combusted and gasified in this coal gasifier, and the product gas (combustible) Gas) is produced. Then, the product gas is purified and then supplied to the gas turbine equipment to burn and generate high-temperature and high-pressure combustion gas to drive the turbine. The exhaust gas after driving the turbine recovers thermal energy by the exhaust heat recovery boiler, generates steam and supplies it to the steam turbine equipment, and drives the turbine. As a result, power generation is performed. On the other hand, the exhaust gas from which the thermal energy has been recovered is released into the atmosphere through a chimney after harmful substances are removed by the gas purification device.

  By the way, in such a coal gasification combined power generation facility, in a coal gasification furnace, coal is combusted and gasified to produce product gas, while slag is generated as a burner. It is necessary to discharge from the gasifier. Since the slag is hot, it has fluidity and is continuously discharged from a slag hole provided in the lower part of the coal gasification furnace. And the slag discharged | emitted from the coal gasification furnace is water-cooled with a cooling tank, and becomes a granulated slag particle. The granulated slag is periodically discharged from the slag lock hopper into a slag reservoir and settled, and is transported to a slag storage tank by a transport device such as a scraper conveyor or a screw conveyor.

  As such a slag discharge system, there is one described in Patent Document 1 below, and it opens toward the settling of a settling basin, and the settling sand is sucked into a receiving pipe by a jet water jet and transported. There is one described in Patent Document 2 below.

JP 2011-074274 A Japanese Utility Model Publication No. 06-045680

  In the conventional slag discharge system described above, a predetermined amount of water is stored in the slag slurry tank, and granulated slag is supplied and accumulated therein. The conveyor for transportation sucks the granulated slag of the slag slurry tank together with water into the slurry pipe by a slurry pump, and transports it to the slag storage tank through the slurry pipe. In this case, when the transportation conveyor stops due to a failure or the like, the amount of slag accumulated in the slag slurry tank increases, and the concentration of the granulated slag sucked into the slurry pipe increases. Then, there is a problem that the granulated slag is not smoothly transported in the slurry pipe and is blocked. In addition, although it is possible to apply a jet pump to the conveyor for transportation, an apparatus becomes large and equipment cost will rise.

  This invention solves the subject mentioned above, and it aims at providing the slurry conveying apparatus which suppresses obstruction | occlusion with the slurry of transport piping and enables smooth conveyance of a slurry.

  A slurry transport device of the present invention for achieving the above object includes a slurry tank capable of storing slurry, a slurry pipe for transporting slurry stored in the slurry tank, a slurry pump provided in the slurry pipe, A slurry suction pipe provided at the most upstream portion of the slurry piping in the slurry transport direction, and a first fluid ejection device that ejects fluid from the outer periphery of the slurry suction pipe toward the center of the suction area of the slurry suction pipe These are provided.

  Accordingly, when the slurry pump is operated, a suction force acts on the slurry suction pipe from the slurry pipe, and this slurry suction pipe can suck the slurry in the slurry tank and transport the slurry through the slurry pipe. And if the density | concentration of the solid particle in the slurry stored in a slurry tank becomes high, the solid particle in slurry will be ejected toward the center side of the suction area | region of a slurry suction pipe with a 1st fluid ejection apparatus. Is scattered, the concentration of solid particles of the slurry in the suction region of the slurry suction pipe is lowered. Therefore, the slurry suction pipe can suck the slurry appropriately, suppress clogging of the slurry piping by the slurry, and enable smooth transfer of the slurry.

  In the slurry conveying apparatus of the present invention, the first fluid ejection device includes a housing disposed in a hollow shape outside the slurry suction pipe, a fluid supply pipe connected to the housing and capable of supplying fluid, and the housing And a plurality of ejection holes capable of ejecting the fluid toward the center side of the suction area of the slurry suction pipe.

  Accordingly, when a fluid is supplied from the fluid supply pipe into the housing, the fluid in the housing is ejected from the plurality of ejection holes toward the center side of the suction area of the slurry suction pipe. By ejecting the fluid to the suction area of the slurry suction pipe, the concentration of the solid particles of the slurry in the suction area can be reduced, and the clogging of the slurry piping with the slurry can be suppressed.

  In the slurry conveying apparatus of the present invention, the slurry suction pipe has a bell mouth shape whose tip is enlarged, and the plurality of ejection holes are formed at the tip of the slurry suction pipe.

  Therefore, by making the slurry suction pipe into a bell mouth shape, the slurry can be sucked in efficiently, and by forming a plurality of ejection holes at the tip of the slurry suction pipe, fluid is transferred to the suction area of the slurry suction pipe. It can be ejected properly.

  In the slurry conveying apparatus of the present invention, the slurry tank has a conical shape at the center lower part and the tip of the slurry suction pipe is opposed to the slurry tank. A second fluid ejection device that can be applied is provided.

  Accordingly, when the second fluid ejection device ejects fluid to the slurry in the slurry tank and imparts a turning force, the solid particles contained in the slurry in the slurry tank move outward by centrifugal force, and the center of the slurry tank The concentration of the solid particles of the slurry in the lower portion, that is, the suction region of the slurry suction tube can be easily reduced.

  In the slurry conveying apparatus of the present invention, the slurry tank has a conical shape at the center lower portion and the tip of the slurry suction pipe is opposed to the slurry tank from the outer peripheral portion of the slurry tank toward the center lower portion of the slurry tank. A third fluid ejection device capable of ejecting fluid is provided.

  Therefore, when the third fluid ejection device ejects fluid from the outer peripheral portion of the slurry tank toward the lower center, the solid particles in the slurry deposited here are scattered, and the lower middle portion of the slurry tank, that is, the slurry suction pipe The concentration of solid particles of the slurry in the suction region can be easily reduced.

  In the slurry transport device of the present invention, a control device capable of controlling the operation of the slurry pump and the first fluid ejection device is provided, and the control device operates the first fluid ejection device when the slurry pump is activated. It is characterized by.

  Therefore, by operating the first fluid ejection device when starting the slurry pump, the concentration of solid particles of the slurry accumulated in the suction region of the slurry suction pipe while the slurry pump is stopped can be reduced. Blockage due to can be suppressed.

  In the slurry conveying device of the present invention, a pressure sensor for detecting the pressure in the slurry pipe, and a control device capable of controlling the operation of the first fluid ejection device based on the detection result of the pressure sensor are provided. Is characterized in that the first fluid jetting device is operated when the pressure in the slurry pipe detected by the pressure sensor becomes equal to or lower than a predetermined pressure set in advance.

  Accordingly, when the slurry is insufficiently conveyed by the slurry piping, the pressure in the slurry piping is reduced. Therefore, when the pressure in the slurry piping becomes equal to or lower than the predetermined pressure, the first fluid ejecting device is operated, thereby the slurry suction pipe. The concentration of the solid particles of the slurry deposited in the suction region can be reduced, and the clogging of the slurry piping with the slurry can be suppressed.

  According to the slurry conveying apparatus of the present invention, the slurry tank, the slurry pipe, the slurry pump, and the slurry suction pipe are provided, and the fluid is ejected from the outer peripheral portion of the slurry suction pipe toward the center side of the suction area of the slurry suction pipe. Since the first fluid ejection device is provided, the fluid is ejected toward the center of the suction area of the slurry suction pipe by the first fluid ejection device, so that the solid particles in the slurry are scattered and the concentration of the solid particles in the slurry. Therefore, the clogging of the slurry piping with the slurry can be suppressed, and the slurry can be smoothly conveyed.

FIG. 1 is a schematic configuration diagram of a coal gasification combined power generation facility to which a slurry conveying apparatus according to Embodiment 1 of the present invention is applied. FIG. 2 is a schematic configuration diagram of a slag discharge system to which the slurry conveying apparatus of the first embodiment is applied. FIG. 3 is a schematic configuration diagram illustrating the slurry transport apparatus according to the first embodiment. FIG. 4 is a schematic view of a slurry suction pipe. FIG. 5 is a bottom view of the slurry suction pipe. FIG. 6 is a horizontal sectional view of the slurry suction pipe. FIG. 7 is a schematic configuration diagram illustrating a slurry transport apparatus according to Embodiment 2 of the present invention. FIG. 8 is a schematic configuration diagram illustrating a slurry transport apparatus according to Embodiment 3 of the present invention. FIG. 9 is a schematic view of a slurry suction pipe in the slurry transport apparatus according to the third embodiment of the present invention.

  Exemplary embodiments of a slag discharge system according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

  FIG. 1 is a schematic configuration diagram of a coal gasification combined power generation facility to which a slurry conveying apparatus according to Embodiment 1 of the present invention is applied, and FIG. 2 is an outline of a slag discharge system to which the slurry conveying apparatus of Embodiment 1 is applied. Configuration diagram, FIG. 3 is a schematic configuration diagram showing the slurry conveying apparatus of Example 1, FIG. 4 is a schematic diagram of a slurry suction pipe, FIG. 5 is a bottom view of the slurry suction pipe, and FIG. It is a horizontal sectional view.

  The coal gasification combined power generation facility (IGCC: Integrated Coal Gasification Combined Cycle) of Example 1 adopts an air combustion method in which coal gas is generated in a gasification furnace using air as an oxidizer, and is purified by a gas purifier. Coal gas is supplied as fuel gas to gas turbine equipment to generate electricity. That is, the combined coal gasification combined power generation facility of this embodiment is a power generation facility of an air combustion system (air blowing). In this case, pulverized coal (coal) is used as a raw material supplied to the gasifier.

  In Example 1, as shown in FIG. 1, the coal gasification combined power generation facility 10 includes a coal supply device 11, a fluidized bed drying device 12, a pulverized coal machine (mill) 13, a coal gasification furnace 14, and a char recovery device 15. , A gas refining device 16, a gas turbine facility 17, a steam turbine facility 18, a generator 19, and a heat recovery steam generator (HRSG) 20.

  The coal feeder 11 includes a raw coal bunker 21, a coal feeder 22, and a crusher 23. The raw coal bunker 21 can store coal and can drop a predetermined amount of coal into the coal feeder 22. The coal feeder 22 can transport the coal dropped from the raw coal bunker 21 by a conveyor or the like and drop it on the crusher 23. The crusher 23 can crush the dropped coal into a predetermined size.

  The fluidized bed drying device 12 supplies drying steam (superheated steam) to the coal introduced by the coal supply device 11 so as to heat and dry the coal, and the moisture contained in the coal. Can be removed. The fluidized bed drying apparatus 12 is provided with a cooler 31 that cools the dried coal taken out from the lower portion, and the dried and cooled dried coal is stored in the dried coal bunker 32. Further, the fluidized bed drying apparatus 12 is provided with a dry coal cyclone 33 and a dry coal electrostatic precipitator 34 for separating dry coal particles from steam taken out from above, and the dry coal particles separated from the steam are dried coal bunker. 32 is stored. The steam from which the dry coal has been separated by the dry coal electrostatic precipitator 34 is compressed by the steam compressor 35 and then supplied to the fluidized bed drying device 12 as drying steam.

  The pulverized coal machine 13 is a coal pulverizer, and pulverizes coal (dried coal) dried by the fluidized bed dryer 12 into fine particles to produce pulverized coal. That is, the pulverized coal machine 13 is one in which the dry coal stored in the dry coal bunker 32 is dropped by the coal feeder 36, and this dry coal) is made into coal having a predetermined particle size or less, that is, pulverized coal. The pulverized coal after being pulverized by the pulverized coal machine 13 is separated from the conveying gas by the pulverized coal bag filters 37a and 37b and stored in the pulverized coal supply hoppers 38a and 38b.

  The coal gasification furnace 14 can supply pulverized coal processed by the pulverized coal machine 13 and can be recycled by returning the char (unburned coal) recovered by the char recovery device 15. .

  That is, the coal gasification furnace 14 is connected to the compressed air supply line 41 from the gas turbine equipment 17 (compressor 61), and can supply compressed air compressed by the gas turbine equipment 17. The air separation device 42 separates and generates nitrogen and oxygen from air in the atmosphere. A first nitrogen supply line 43 is connected to the coal gasifier 14, and a pulverized coal supply hopper is connected to the first nitrogen supply line 43. Charging lines 44a and 44b from 38a and 38b are connected. The second nitrogen supply line 45 is also connected to the coal gasification furnace 14, and the char return line 46 from the char recovery device 15 is connected to the second nitrogen supply line 45. Further, the oxygen supply line 47 is connected to the compressed air supply line 41. In this case, nitrogen is used as a carrier gas for coal and char, and oxygen is used as an oxidant.

  The coal gasification furnace 14 is, for example, a spouted bed type gasification furnace, which combusts and gasifies coal, char, air (oxygen) supplied therein or water vapor as a gasifying agent, and produces carbon dioxide. A combustible gas (product gas, coal gas) containing carbon as a main component is generated, and a gasification reaction takes place using this combustible gas as a gasifying agent. In this case, the coal gasification furnace 14 is provided with a slag discharge system 48 that discharges slag generated in the lower part of the reaction furnace 14a. The coal gasification furnace 14 is not limited to a spouted bed gasification furnace, and may be a fluidized bed gasification furnace or a fixed bed gasification furnace. The coal gasification furnace 14 is provided with a gas generation line 49 for combustible gas toward the char recovery device 15, and can discharge combustible gas containing char. In this case, by providing a gas cooler in the gas generation line 49, the combustible gas may be cooled to a predetermined temperature and then supplied to the char recovery device 15.

  The char recovery device 15 includes a dust collector 51 and a supply hopper 52. In this case, the dust collector 51 is constituted by one or a plurality of bag filters or cyclones, and can separate char contained in the combustible gas generated in the coal gasification furnace 14. The combustible gas from which the char has been separated is sent to the gas purification device 16 through the gas discharge line 53. The supply hopper 52 stores the char separated from the combustible gas by the dust collector 51. A bin may be disposed between the dust collector 51 and the supply hopper 52, and a plurality of supply hoppers 52 may be connected to the bin. A char return line 46 from the supply hopper 52 is connected to the second nitrogen supply line 45.

The gas purification device 16 performs gas purification by removing impurities such as sulfur compounds and nitrogen compounds from the combustible gas from which the char has been separated by the char recovery device 15. The gas purifier 16 purifies the combustible gas to produce fuel gas and supplies it to the gas turbine equipment 17. In the gas purifier 16, since the combustible gas from which the char is separated still contains sulfur (H ₂ S), the sulfur is finally removed by removing it with the amine absorbent. Is recovered as gypsum and used effectively.

  The gas turbine equipment 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. The combustor 62 has a compressed air supply line 65 connected to the compressor 61, a fuel gas supply line 66 connected to the gas purifier 16, and a combustion gas supply line 67 connected to the turbine 63. Further, the gas turbine equipment 17 is provided with a compressed air supply line 41 extending from the compressor 61 to the coal gasification furnace 14, and a booster 68 is provided in the middle. Therefore, in the combustor 62, the compressed air supplied from the compressor 61 and the fuel gas supplied from the gas purifier 16 are mixed and burned, and the rotating shaft 64 is rotated by the generated combustion gas in the turbine 63. By doing so, the generator 19 can be driven.

  The steam turbine facility 18 includes a turbine 69 that is coupled to the rotating shaft 64 in the gas turbine facility 17, and the generator 19 is coupled to the base end portion of the rotating shaft 64. The exhaust heat recovery boiler 20 is provided in the exhaust gas line 70 from the gas turbine equipment 17 (the turbine 63), and generates steam by exchanging heat between the air and the high temperature exhaust gas. Therefore, the exhaust heat recovery boiler 20 is provided with the steam supply line 71 between the steam turbine equipment 18 and the turbine 69 of the steam turbine equipment 18, the steam recovery line 72 is provided, and the steam recovery line 72 is provided with the condenser 73. Yes. Therefore, in the steam turbine facility 18, the turbine 69 is driven by the steam supplied from the exhaust heat recovery boiler 20, and the generator 19 can be driven by rotating the rotating shaft 64.

  The exhaust gas from which heat has been recovered by the exhaust heat recovery boiler 20 is freed of harmful substances by the gas purification device 74, and the purified exhaust gas is discharged from the chimney 75 to the atmosphere.

  Here, the action | operation of the coal gasification combined cycle power generation equipment 10 of Example 1 is demonstrated.

  In the combined coal gasification combined power generation facility 10 of the first embodiment, the raw coal is stored in the raw coal bunker 21 by the coal feeder 11, and the coal in the raw coal bunker 21 is dropped on the crusher 23 by the coal feeder 22. Here, it is crushed into a predetermined size. The crushed coal is heated and dried by the fluidized bed drying device 12, cooled by the cooler 31, and stored in the dry coal bunker 32. Further, the steam taken out from the upper part of the fluidized bed drying device 12 is separated into dry coal particles by the dry coal cyclone 33 and the dry coal electrostatic precipitator 34 and compressed by the steam compressor 35 before being supplied to the fluidized bed drying device 12. Returned as drying steam. On the other hand, the dry coal particles separated from the steam are stored in the dry coal bunker 32.

  The dry coal stored in the dry coal bunker 32 is fed into the pulverized coal machine 13 by the coal feeder 36, where it is pulverized into fine particles to produce pulverized coal, and through the pulverized coal bag filters 37a and 37b. And stored in the pulverized coal supply hoppers 38a and 38b. The pulverized coal stored in the pulverized coal supply hoppers 38 a and 38 b is supplied to the coal gasification furnace 14 through the first nitrogen supply line 43 by nitrogen supplied from the air separation device 42. Further, the char recovered by the char recovery device 15 described later is supplied to the coal gasification furnace 14 through the second nitrogen line 45 by nitrogen supplied from the air separation device 42. Further, the compressed air extracted from the gas turbine equipment 17 to be described later is boosted by the booster 68 and then supplied to the coal gasification furnace 14 through the compressed air supply line 41 together with oxygen supplied from the air separation device 42.

  In the coal gasification furnace 14, the supplied pulverized coal and char are combusted by compressed air (oxygen), and the pulverized coal and char are gasified to generate combustible gas (coal gas) mainly composed of carbon dioxide. Can be generated. The combustible gas is discharged from the coal gasifier 14 through the gas generation line 49 and sent to the char recovery device 15.

  In the char recovery device 15, the combustible gas is first supplied to the dust collector 51, whereby the char contained in the gas is separated from the combustible gas. The combustible gas from which the char has been separated is sent to the gas purification device 16 through the gas discharge line 53. On the other hand, the fine char separated from the combustible gas is deposited on the supply hopper 52, returned to the coal gasifier 14 through the char return line 46, and recycled.

  The combustible gas from which the char has been separated by the char recovery device 15 is subjected to gas purification by removing impurities such as sulfur compounds and nitrogen compounds in the gas purification device 16 to produce fuel gas. In the gas turbine facility 17, when the compressor 61 generates compressed air and supplies the compressed air to the combustor 62, the combustor 62 is supplied from the compressed air supplied from the compressor 61 and the gas purification device 16. Combustion gas is generated by mixing with fuel gas and combusting, and the turbine 63 is driven by this combustion gas, so that the generator 19 can be driven via the rotating shaft 64 to generate power.

  The exhaust gas discharged from the turbine 63 in the gas turbine equipment 17 generates steam by exchanging heat with air in the exhaust heat recovery boiler 20, and supplies the generated steam to the steam turbine equipment 18. . In the steam turbine facility 18, the generator 69 can be driven through the rotating shaft 64 to generate electric power by driving the turbine 69 with the steam supplied from the exhaust heat recovery boiler 20.

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

  In the above description, coal is used as a raw material. However, this coal can be applied to high-grade coal and low-grade coal, and is not limited to coal. Biomass used as a resource may be used. For example, thinned wood, waste wood, driftwood, grass, waste, sludge, tires, and recycled fuel (pellets and chips) made from these materials may be used. Is possible.

  Hereinafter, the slag discharge system 48 in the coal gasification combined power generation facility 10 described above will be described in detail.

  The slag discharge system 48 discharges the molten slag 201 accumulated at the bottom of the coal gasification furnace 14. In the slag discharge system 48, as shown in FIG. 2, the coal gasification furnace 14 (reaction furnace 14 a) is provided with a slag hole 101 for dropping the molten slag 201 at the bottom, and the slag is provided below the slag hole 101. A slag hopper 102 for storing the molten slag 201 that has fallen from the hole 101 is provided. The slag hopper 102 is formed in a funnel shape having an inner diameter that decreases downward in the vertical direction, and is immersed in slag cooling water (cooling water) 202 stored at the bottom of the coal gasification furnace 14. The slag hopper 102 has an upper large-diameter opening located in the slag cooling water 202, and a lower small-diameter opening penetrating the bottom of the coal gasifier 14 to the outside and opened and closed here. A valve 103 is mounted to open and close the small diameter opening.

  Therefore, the molten slag 201 generated in the coal gasification furnace 14 falls into the slag cooling water 202 from the slag hole 101, and the molten slag 201 dropped into the slag cooling water 202 is quenched and is several millimeters to several tens of times. It becomes particles of glassy granulated slag (slag) 203 of about millimeters. The slag hopper 102 moves the granulated slag 203 downward in the vertical direction, collects it in one lower position, and switches the opening and closing of the on-off valve 103, thereby discharging and stopping the granulated slag 203. Can be switched. Note that the slag hopper 102 can discharge the slag cooling water 202 including the granulated slag 203 by opening the on-off valve 103.

  The slag discharge system 48 is located below the coal gasification furnace 14 (reaction furnace 14a), and is provided with a slag lock hopper 104, a slag reservoir 105, a slurry transport device 106, and a slag storage tank 107.

  The slag lock hopper 104 is a storage unit that temporarily stores slag cooling water 202 including the granulated slag 203, and is disposed below the slag hopper 102 in the coal gasification furnace 14. The slag lock hopper 104 can receive and temporarily store the slag cooling water 202 including the granulated slag 103 discharged from the small-diameter opening of the slag hopper 102 when the on-off valve 103 is opened. In addition, the slag lock hopper 104 is provided with an opening / closing valve 111 at the lower opening, and by opening the opening / closing valve 111, the slag cooling water 202 including the granulated slag 203 that is temporarily stored is supplied. It can be discharged downward.

  The slag reservoir 105 includes a slag reservoir tank 112 and a slag conveyor 113 driven by a motor M. The slag reservoir tank 112 stores slag cooling water 202 including the granulated slag 203 discharged from the slag lock hopper 104. The slag conveyor 113 is disposed in an inclined state in the slag reservoir tank 112, a lower portion is disposed in the slag reservoir tank 112, and an upper portion is disposed outside the slag reservoir tank 112. Therefore, the slag reservoir 105 can move and discharge the granulated slag 203 stored together with the slag cooling water 202 in the slag reservoir tank 112 by a predetermined amount by operating the slag conveyor 113. In this case, when the granulated slag 203 is moved and discharged, the slag conveyor 113 follows and discharges some slag cooling water 202 as well.

  The slurry conveying device 106 conveys the granulated slag 203 discharged from the slag reservoir 105 as a slurry to the slag storage tank 107, and includes a slurry tank 121, a slurry pipe 122, a slurry pump 123, and a slurry suction pipe. 124.

  The slurry tank 121 is a tank that stores the granulated slag 203 and the slurry water 204 discharged from the slag reservoir 105. The slurry tank 121 is in a state where the granulated slag 203 is dispersed in the slurry water 204 and is stored as the slurry 205. The slurry pipe 122 has a base end portion disposed in the slurry tank 121 and a tip end portion extending to the slag storage tank 107. The slurry pump 123 is disposed in the slurry pipe 122 and pumps the slurry 205 in which the granulated slag 203 in the slurry tank 121 is dispersed in the slurry water 204 through the slurry pipe 122 toward the slag storage tank 107. The slurry suction pipe 124 is connected to the base end portion (the most upstream portion in the slurry transport direction) of the slurry pipe 122, and the front end faces downward, that is, the bottom portion of the slurry tank 121.

  Therefore, the slurry conveying device 106 disperses the granulated slag 203 in the slurry water 204 in the slurry tank 121 to form the slurry 205, and operates the slurry pump 123, whereby the slurry 205 in the slurry tank 121 is operated from the slurry suction pipe 124. This slurry 205 can be pumped from the slurry pipe 122 to the slag storage tank 107.

  Further, the slurry transport unit 106 includes a liquid level adjusting device 125. The liquid level adjusting device 125 includes a water storage tank 131, a supply pipe 132, a water supply pump 133, a circulation pipe 134, an overflow pipe 135, an on-off valve 136, a level meter 137, and a liquid level control unit 138. doing.

  The water storage tank 131 is a tank that stores the slurry water 204. The supply pipe 132 has a base end connected to the water storage tank 131 and a tip end connected to the slurry tank 121, and connects the water storage tank 131 and the slurry tank 121. The water supply pump 133 is disposed in the supply pipe 132 and causes the slurry water 204 stored in the water storage tank 131 to be pumped into the supply pipe 132 toward the slurry tank 121. The circulation pipe 134 has a base end connected to the downstream side of the supply pipe 132 in the conveying direction of the slurry water 204 with respect to the feed water pump 133, and a tip connected to the water storage tank 131 to store excess slurry water 204. Return to tank 131.

  The overflow pipe 135 has a base end connected to the slurry tank 121 and a tip connected to the water storage tank 131, and returns the slurry water 204 overflowing from the slurry tank 121 to the water storage tank 131. That is, the base end portion of the overflow pipe 135 penetrates the wall surface of the slurry tank 121 at a predetermined liquid level. When the slurry water 204 is exceeded, the excess slurry water 204 returns to the water storage tank 131. The on-off valve 136 is disposed on the downstream side in the transport direction of the slurry water 204 with respect to the connecting portion of the supply pipe 132 between the feed water pump 133 and the circulation pipe 134, and switches between opening and closing of the pipeline of the supply pipe 132. Level meter 137 is a sensor that detects the level of slurry water 204 in slurry tank 121. The liquid level control unit 138 controls the opening / closing of the on-off valve 136 based on the liquid level of the slurry water 204 in the slurry tank 121 detected by the level meter 137, so that the slurry water 204 stored in the water storage tank 131 is controlled. Is switched to supply the slurry tank 121 from the supply pipe 132.

  Accordingly, in the liquid level adjusting device 125, the liquid level control unit 138 opens the on-off valve 136 when the liquid level of the slurry water 204 in the slurry tank 121 detected by the level meter 137 falls below a preset specified value. Thus, the slurry water 204 flowing through the supply pipe 132 is supplied to the slurry tank 121. On the other hand, when the liquid level detected by the level meter 137 rises above the specified value, the liquid level control unit 138 closes the on-off valve 136 so that the slurry water 204 flowing through the supply pipe 132 is not supplied to the slurry tank 121. When the on-off valve 136 is closed, the slurry water 204 flowing through the supply pipe 132 by the water supply pump 133 is returned to the water storage tank 131 from the circulation pipe 134. As a result, the water supply pump 133 can be driven at all times, and control with high responsiveness is possible.

  The slag storage tank 107 is a tank that stores the slurry 205 that is pressure-fed through the slurry pipe 122 of the slurry conveying device 106. The slag storage tank 107 has a main body 141 and a plurality of filters 142. The main body 141 is a hollow tower, and in this embodiment, has a square tube shape with a horizontal cross section being a quadrangle, and is provided with an end portion in which the inner diameter gradually decreases downward in the vertical direction. Each filter 142 is a member that does not allow the granulated slag 203 to pass through, but allows only the slurry water 204 to pass through. The filter 142 is disposed along the side surface (wall surface) of the main body 141 in the vertical direction, and the side surface of the main body 141 has a diameter. It is arranged in a part that gradually decreases. Therefore, when the slurry 205 is supplied from the slurry transport device 106, the slag storage tank 107 discharges only the slurry water 204 from each filter 142 to make the drained water 206, while the lower end of the main body 141 is granulated. The slag 203 is stored.

  Further, the slag storage tank 107 has a water receiving portion 143 on the lower side of each filter 142 disposed on the side surface of the main body 141 and on the lower side of each filter 142 disposed on the portion where the inner diameter of the side surface of the main body 141 gradually decreases. , 144 are provided. The water receivers 143 and 144 are connected to the slurry tank 121 via a recovery pipe 145. Each of the water receiving portions 143 and 144 collects the discharged water 206 separated and discharged by the filter 142. The recovery pipe 145 returns the discharged water 206 recovered by the water receivers 143 and 144 to the slurry tank 121.

  The slag storage tank 107 has a discharge port 146 at the lower end. The discharge port 146 is for discharging and stopping the granulated slag 203 stored in the slag storage tank 107. The granulated slag 203 discharged from the discharge port 146 is discharged to the transport vehicle 108 that is waiting immediately below. The transport vehicle 108 is a vehicle that carries the granulated slag 203 discharged from the slag discharge system 48 to a predetermined place. A truck can be used as the transport vehicle 108.

  In the slag discharge system 48 configured as described above, the molten slag 201 generated at the bottom of the gasification furnace 14 is recovered by the slag hopper 102 as the granulated slag 203 by being cooled by the slag cooling water 202. In the slag hopper 102, the slag cooling water 202 including the granulated slag 203 is discharged and temporarily stored in the slag lock hopper 104 by opening the opening / closing valve 103 at the lower end. The granulated slag 203 stored in the slag lock hopper 104 is dropped by a predetermined amount every predetermined time into the slag reservoir tank 112 of the slag reservoir 105 by opening the opening / closing valve 111 at the lower end, and is slurried by the slag conveyor 113. It is transferred to the slurry tank 121 of the transfer device 106.

  Then, the granulated slag 203 stored in the slurry tank 121 becomes slurry 205 by the slurry water 204, and when the slurry pump 123 is operated, it is sucked in from the slurry suction pipe 124, and is put into the slag storage tank 107 by the slurry pipe 122. Pumped. In the slurry conveying device 106, the liquid level in the slurry tank 121 is maintained within a certain range by the liquid level adjusting device 125. The slurry water 204 pumped together with the granulated slag 203 to the slag storage tank 107 is discharged from the filter 142 and recovered as discharged water 206 by the water receiving portions 143 and 144. The discharged water 206 collected by the water receiving portions 143 and 144 is returned to the slurry tank 121 through the collecting pipe 145 and reused as the slurry water 204 again.

  By the way, in the above-described slurry conveying device 106, when the slurry pump 123 is operated, the slurry suction pipe 124 sucks the slurry 205 (slurry water 204 including the granulated slag 203) in the slurry tank 121 into the slurry pipe 122, The slurry is transferred to the slag storage tank 107 through the slurry pipe 122. In this case, when the amount of the granulated slag 203 accumulated in the slurry tank 121 increases, the concentration of the granulated slag 203 in the slurry 205 increases, and the slurry pipe 122 may be blocked by the granulated slag 203.

  Accordingly, in the first embodiment, the first water ejection device that ejects water (fluid) from the outer peripheral portion of the slurry suction pipe 124 toward the center side of the suction region of the slurry suction pipe 124 in the slurry conveying device 106 described above. (First fluid ejection device) 151 is provided.

  As shown in FIGS. 3 to 5, the first water ejection device 151 includes a housing 152, a water supply pipe 153, and a plurality of ejection holes 154. That is, the slurry tank 121 is composed of a cylindrical portion 121a and a conical bottom portion 121b having a conical shape at the center lower portion so as to constitute a bottom portion. On the other hand, the slurry suction pipe 124 has a bell mouth shape composed of a cylindrical portion 124a on the base end (upper end) side and an enlarged diameter portion 124b on the front end (lower end) side. The slurry suction pipe 124 is disposed at the center of the slurry tank 121, the slurry pipe 122 is connected to the cylindrical portion 124 a, and the enlarged diameter portion 124 b faces the conical bottom 121 b of the slurry tank 121.

  The slurry suction pipe 124 has a housing 152 fixed to the outer peripheral portion so as to cover the outer peripheral side of the slurry suction pipe 124. The housing 152 has a ring shape and is disposed at a predetermined interval outside a part of the cylindrical part 124a of the slurry suction pipe 124 and the enlarged diameter part 124b. Similarly to the slurry suction pipe 124, a part of the cylindrical part 152a While having the enlarged diameter part 152b, it becomes the airtight hollow shape which the upper end part and the lower end part closed. In the housing 152, the end of the water supply pipe 153 is connected to the cylindrical portion 152a.

  In addition, the slurry suction pipe 124 has a plurality of ejection holes 154 formed at the tip, that is, the enlarged diameter portion 124b. Each of the ejection holes 154 is formed side by side (three in this embodiment) along the longitudinal direction of the enlarged diameter portion 124b, and a plurality (six in this embodiment) along the circumferential direction are predetermined. It is formed at intervals. Each of the ejection holes 154 can eject water in the housing 152 toward the center line O of the slurry suction pipe 124 in the suction area A of the slurry suction pipe 124.

  Further, in the present embodiment, the second water ejection device (second fluid ejection device) 161 capable of imparting a turning force by ejecting water (fluid) to the slurry 205 of the slurry tank 121 by the slurry conveying device 106. Is provided.

  As shown in FIGS. 3 and 6, in the second water ejection device 161, a plurality (four in this embodiment) of water injection nozzles 162 are fixed at predetermined intervals in the circumferential direction on the conical bottom 121 b of the slurry tank 121. Has been. Each of the water injection nozzles 162 is disposed on the outer peripheral portion of the slurry tank 121 in a direction close to the tangential direction and slightly upward from the horizontal. Each water injection nozzle 162 is connected to the end of the water supply pipe 163.

  The first water ejection device 151 and the second water ejection device 161 can supply the slurry water 204 in the water storage tank 131. That is, the supply pipe 132 from the water storage tank 131 is branched from the water supply pump 133 and the opening / closing valve 136 into a branch supply pipe 166, and the branch supply pipe 166 is provided with the opening / closing valve 167. The branch supply pipe 166 is connected to water supply pipes 153 and 163.

  A control unit (control device) (not shown) can control the operation of the slurry pump 123, the first water ejection device 151, and the second water ejection device 161. The 1 water ejection apparatus 151 and the 2nd water ejection apparatus 161 are operated. In this case, the control unit may operate only the first water ejection device 151 when the slurry pump 123 is activated.

  Therefore, for example, when the conveyance of the granulated slag 203 by the slurry conveying device 106 is temporarily stopped, the amount of the granulated slag 203 accumulated in the slurry tank 121 increases. Therefore, the control unit operates the first water ejection device 151 and the second water ejection device 161 together with the slurry pump 123 when the slurry transport device 106 is restarted.

  That is, when the slurry pump 123 is operated, the slurry 205 (granulated slag 203, slurry water 204) stored in the slurry tank 121 is sucked from the slurry suction pipe 124 and is pumped by the slurry pipe 122. At this time, when the on-off valve 167 is opened, the slurry water 204 in the water storage tank 131 is supplied from the supply pipe 132 to the first water ejection device 151 through the branch supply pipe 166. Then, the slurry water 204 is supplied to the housing 152 and is ejected toward the suction region A from the plurality of ejection holes 154 formed at the tip of the slurry suction pipe 124. Therefore, the granulated slag 203 accumulated at the bottom of the slurry tank 121 is scattered by the slurry water 204 from each ejection hole 154. When the on-off valve 167 is opened, the slurry water 204 in the water storage tank 131 is supplied from the supply pipe 132 to the second water ejection device 161 through the branch supply pipe 166. Then, the slurry water 204 is supplied to each water injection nozzle 162, and is ejected from each water injection nozzle 162 toward the outer peripheral portion of the slurry tank 121 in the tangential direction. Therefore, the slurry water 204 stored in the slurry tank 121 is swirled by the slurry water 204 from each water injection nozzle 162, and the granulated slag 203 accumulated at the bottom of the slurry tank 121 is swirling centrifugally. Move outward by force. As a result, at the bottom of the slurry tank 121, the granulated slag 203 scatters or moves, so that the concentration of the granulated slag 203 in the slurry 205 decreases and the water sucked into the slurry pipe 122 from the slurry suction pipe 124. The amount of crushed slag 203 is optimized, and blockage of slurry piping 122 by granulated slag 203 is prevented.

  As described above, in the slurry conveying apparatus according to the first embodiment, the slurry tank 121 capable of storing the slurry 205, the slurry pipe 122 that conveys the slurry 205 stored in the slurry tank 121, and the slurry provided in the slurry pipe 122. A pump 123, a slurry suction pipe 124 provided at the most upstream portion of the slurry pipe 122 in the conveying direction of the slurry 205, and a slurry water 204 that spouts the slurry water 204 from the outer periphery of the slurry suction pipe 124 toward the center of the suction area A. A single water ejection device 151 is provided.

  Accordingly, when the slurry pump 123 is operated, a suction force acts on the slurry suction pipe 124 from the slurry pipe 122, and the slurry suction pipe 124 sucks the slurry 205 in the slurry tank 121 and conveys the slurry 205 through the slurry pipe 122. be able to. And if the density | concentration of the granulated slag 203 in the slurry 205 stored in the slurry tank 121 becomes high, the slurry water 204 will be ejected toward the center side of the suction area A of the slurry suction pipe 124 by the 1st water ejection apparatus 151. By doing so, since the granulated slag 203 in the slurry 205 is scattered, the concentration of the granulated slag 203 in the suction region A of the slurry suction pipe 124 is lowered. Therefore, the slurry suction pipe 124 can appropriately suck the slurry 205, suppress clogging of the slurry pipe 122 by the slurry 205, and enable the slurry 205 to be smoothly conveyed.

  Further, in the slurry conveying apparatus of the first embodiment, as the first water ejecting apparatus 151, a housing 152 that is disposed in a hollow shape outside the slurry suction pipe 124, and water that is connected to the housing 152 and can supply the slurry water 204 is provided. A supply pipe 153 and a plurality of ejection holes 154 capable of ejecting the slurry water 204 in the housing 152 toward the center side of the suction region A of the slurry suction pipe 124 are provided. Accordingly, when the slurry water 204 is supplied from the water supply pipe 153 into the housing 152, the slurry water 204 in the housing 152 is directed from the plurality of ejection holes 154 toward the center of the suction region A of the slurry suction pipe 124. By ejecting the slurry water 204 to the suction area A with a simple configuration, the concentration of the granulated slag 203 in the slurry 205 in the suction area A can be reduced, and the slurry pipe 122 is blocked. Can be suppressed.

  Further, in the slurry conveying apparatus of the first embodiment, the slurry suction pipe 124 has a bell mouth shape whose tip is enlarged, and a plurality of ejection holes 154 are formed at the tip of the slurry suction pipe 124. Therefore, the slurry suction pipe 124 is formed in a bell mouth shape so that the slurry 205 can be sucked efficiently, and the slurry water 204 is sucked by forming a plurality of ejection holes 154 at the tip of the slurry suction pipe 124. The water granulated slag 203 can be scattered by appropriately ejecting into the region A.

  Further, in the slurry conveying apparatus of Example 1, the slurry tank 121 has a conical shape at the center lower portion and the tip of the slurry suction pipe 124 is opposed to the slurry tank 121 so that the slurry water 204 is supplied to the slurry 205 of the slurry tank 121 A second water ejection device 161 is provided that is capable of ejecting and applying a turning force. Therefore, when the second water ejection device 161 ejects the slurry water 204 to the slurry 205 in the slurry tank 121 to give a turning force, the granulated slag 203 contained in the slurry 205 in the slurry tank 121 is moved outward by centrifugal force. It moves, and the density | concentration of the granulated slag 203 of the slurry 205 in the center lower part of the slurry tank 121, ie, the suction area | region A, can be reduced easily.

  Further, in the slurry conveying device of the first embodiment, a control unit capable of controlling the operation of the slurry pump 123 and the first water jetting device 151 is provided, and the control unit operates the first water jetting device 151 when the slurry pump 123 is activated. ing. Therefore, the concentration of the granulated slag 203 accumulated in the suction region A of the slurry suction pipe 124 while the slurry pump 123 is stopped can be reduced by operating the first water ejection device 151 when the slurry pump 123 is started. Further, the clogging of the slurry pipe 122 by the slurry can be suppressed.

  FIG. 7 is a schematic configuration diagram illustrating a slurry transport apparatus according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the second embodiment, as shown in FIG. 7, the slurry water 204 is ejected from the outer peripheral portion of the slurry suction pipe 124 toward the center side of the suction region A of the slurry suction pipe 124 as shown in FIG. A first water ejection device 151 is provided. The first water ejection device 151 has a housing 152, a water supply pipe 153, and a plurality of ejection holes 154, and the plurality of ejection holes 154 are formed at the tip of the slurry suction pipe 124.

  In the present embodiment, the slurry transport device 171 is provided with a third water ejection device 172 capable of ejecting the slurry water 204 from the outer peripheral portion of the slurry tank 121 toward the center lower portion of the slurry tank 121. In the third water ejection device 171, a plurality (four in this embodiment) of water injection nozzles 173 are fixed to the cylindrical portion 121 a of the slurry tank 121 at a predetermined interval in the circumferential direction. Each of the water injection nozzles 173 is arranged on the outer peripheral portion of the slurry tank 121 so as to face the center of the bottom of the slurry tank 121 substantially perpendicular to the tangential direction and slightly downward from the horizontal. Each water injection nozzle 173 is connected to the end of the water supply pipe 174.

  The first water ejection device 151 and the third water ejection device 172 can supply the slurry water 204 of the water storage tank 131. That is, the supply pipe 132 from the water storage tank 131 is branched from the water supply pump 133 and the opening / closing valve 136 into a branch supply pipe 166, and the branch supply pipe 166 is provided with the opening / closing valve 167. The branch supply pipe 166 is connected to water supply pipes 153 and 174.

  A control unit (control device) (not shown) can control the operation of the slurry pump 123, the first water jetting device 151, and the third water jetting device 172. The 1 water ejection device 151 and the third water ejection device 172 are operated. In this case, the control unit may operate only the first water ejection device 151 when the slurry pump 123 is activated.

  Therefore, for example, when the conveyance of the granulated slag 203 by the slurry conveying device 106 is temporarily stopped, the amount of the granulated slag 203 accumulated in the slurry tank 121 increases. Therefore, the control unit operates the first water ejection device 151 and the third water ejection device 172 together with the slurry pump 123 when the slurry transport device 106 is restarted.

  That is, when the slurry pump 123 is operated, the slurry 205 (granulated slag 203, slurry water 204) stored in the slurry tank 121 is sucked from the slurry suction pipe 124 and is pumped by the slurry pipe 122. At this time, when the on-off valve 167 is opened, the slurry water 204 in the water storage tank 131 is supplied from the supply pipe 132 to the first water ejection device 151 through the branch supply pipe 166. Then, the slurry water 204 is supplied to the housing 152 and is ejected toward the suction region A from the plurality of ejection holes 154 formed at the tip of the slurry suction pipe 124. Therefore, the granulated slag 203 accumulated at the bottom of the slurry tank 121 is scattered by the slurry water 204 from each ejection hole 154. When the on-off valve 167 is opened, the slurry water 204 in the water storage tank 131 is supplied from the supply pipe 132 to the third water ejection device 172 through the branch supply pipe 166. Then, the slurry water 204 is supplied to each water injection nozzle 173, and is ejected from each water injection nozzle 173 toward the bottom center of the slurry tank 121. Therefore, the granulated slag 203 accumulated at the bottom of the slurry tank 121 is scattered by the slurry water 204 from each water injection nozzle 173. As a result, at the bottom of the slurry tank 121, the granulated slag 203 scatters, so that the concentration of the granulated slag 203 in the slurry 205 decreases and the amount of the granulated slag 203 sucked into the slurry pipe 122 from the slurry suction pipe 124. And the blockage of the slurry piping 122 by the granulated slag 203 is prevented.

  As described above, in the slurry conveying apparatus according to the second embodiment, the slurry tank 121 capable of storing the slurry 205, the slurry pipe 122 that conveys the slurry 205 stored in the slurry tank 121, and the slurry provided in the slurry pipe 122. A pump 123, a slurry suction pipe 124 provided at the most upstream portion in the slurry transfer direction of the slurry 205 in the slurry pipe 122, and a slurry water 204 that spouts the slurry water 204 from the outer periphery of the slurry suction pipe 122 toward the center side of the suction area A. A single water jetting device 151 and a third water jetting device 172 capable of jetting slurry water 204 from the outer periphery of the slurry tank 121 toward the lower center of the slurry tank 121 are provided.

  Accordingly, when the slurry pump 123 is operated, a suction force acts on the slurry suction pipe 124 from the slurry pipe 122, and the slurry suction pipe 124 sucks the slurry 205 in the slurry tank 121 and conveys the slurry 205 through the slurry pipe 122. be able to. And if the density | concentration of the granulated slag 203 in the slurry 205 stored in the slurry tank 121 becomes high, the center side of the suction area | region A of the slurry suction pipe 124 will be carried out by the 1st water ejection apparatus 151 and the 3rd water ejection apparatus 172. By ejecting the slurry water 204 toward the surface, the granulated slag 203 in the slurry 205 is scattered, so that the concentration of the granulated slag 203 in the suction region A of the slurry suction pipe 124 is lowered. Therefore, the slurry suction pipe 124 can appropriately suck the slurry 205, suppress clogging of the slurry pipe 122 by the slurry 205, and enable the slurry 205 to be smoothly conveyed.

  In addition, in Example 1 to 2 mentioned above, in addition to the 1st water ejection apparatus 151, the 2nd water ejection apparatus 161 and the 3rd water ejection apparatus 172 were provided, but this 2nd water ejection apparatus 161 and 3rd. The water ejection device 172 may be omitted or both. Moreover, although it comprised so that the 1st water ejection apparatus 151 might be operated at the time of starting of the slurry pump 123, it comprised so that the 2nd water ejection apparatus 161 and the 3rd water ejection apparatus 172 might be operated at the time of activation of the slurry pump 123. Also good. Further, when the concentration of the granulated slag 203 is low, it is not necessary to operate each of the water jetting devices 151, 161, 172 when starting the slurry pump 123. Also, depending on the concentration of the granulated slag 203, the slurry pump 123 is activated. Each of the water ejection devices 151, 161, 172 may be operated immediately before or immediately after activation. A concentration sensor that detects the concentration of the granulated slag 203 in the suction region A of the slurry suction pipe 124 may be used.

  FIG. 8 is a schematic configuration diagram illustrating a slurry transport apparatus according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the third embodiment, as shown in FIG. 8, the first water that ejects the slurry water 204 from the outer peripheral portion of the slurry suction pipe 124 toward the center side of the suction area of the slurry suction pipe 124 in the slurry transport device 181. An ejection device 151 is provided.

  The slurry transport device 181 is provided with a pressure sensor 182 that detects the pressure in the slurry pipe 122. Further, the control unit (control device) 183 can control the operation of the first water ejection device 151 based on the detection result of the pressure sensor 182. The pressure sensor 182 is disposed in the slurry pipe 122 between the slurry suction pipe 124 and the slurry pump 123, and detects the pressure here, that is, the water pressure (conveyance pressure) of the slurry. The control unit 183 operates the first fluid ejection device 151 when the pressure in the slurry pipe 122 detected by the pressure sensor 182 is equal to or lower than a predetermined pressure set in advance. That is, when the granulated slag 203 is clogged and blocked in the slurry pipe 122, new granulated slag 203 cannot be sucked from the slurry tank 121, and the pressure in the slurry suction pipe 124 decreases. Therefore, if the pressure in the slurry pipe 122 becomes a predetermined pressure or less, that is, if the granulated slag 203 is likely to be clogged in the slurry pipe 122 and the pressure drops below the predetermined pressure, the slurry pipe 122 may be blocked. The first fluid ejection device 151 is actuated to prevent the blockage.

  As described above, in the slurry conveyance device according to the third embodiment, the slurry tank 121 that can store the slurry 205, the slurry pipe 122 that conveys the slurry 205 stored in the slurry tank 121, and the slurry provided in the slurry pipe 122. A pump 123, a slurry suction pipe 124 provided at the most upstream portion in the slurry transfer direction of the slurry 205 in the slurry pipe 122, and a slurry water 204 that spouts the slurry water 204 from the outer periphery of the slurry suction pipe 122 toward the center side of the suction area A. 1 water ejection device 151, a pressure sensor 182 for detecting the pressure in the slurry piping 122, and the first fluid ejection device 151 when the pressure in the slurry piping 122 detected by the pressure sensor 182 is equal to or lower than a predetermined pressure set in advance. A control unit 183 is provided to actuate.

  Accordingly, when the slurry pump 123 is operated, a suction force acts on the slurry suction pipe 124 from the slurry pipe 122, and the slurry suction pipe 124 sucks the slurry 205 in the slurry tank 121 and conveys the slurry 205 through the slurry pipe 122. be able to. When the pressure in the slurry pipe 122 detected by the pressure sensor 182 becomes equal to or lower than a predetermined pressure, it is estimated that the slurry pipe 122 may be blocked, and the first fluid ejection device 151 is operated. That is, the slurry water 204 is ejected toward the center side of the suction region A of the slurry suction pipe 124 by the first water ejection device 151, so that the granulated slag 203 in the slurry 205 is scattered and the slurry suction pipe 124 is sucked. The concentration of the granulated slag 203 in the region A is decreased. Therefore, the slurry suction pipe 124 can appropriately suck the slurry 205, suppress clogging of the slurry pipe 122 by the slurry 205, and enable the slurry 205 to be smoothly conveyed.

  FIG. 9 is a schematic view of a slurry suction pipe in the slurry transport apparatus according to the third embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the fourth embodiment, as shown in FIG. 9, the first water ejection that ejects slurry water from the outer peripheral portion of the slurry suction pipe 192 toward the center side of the suction area of the slurry suction pipe 192 in the slurry conveying device 191. A device (first fluid ejection device) 193 is provided.

  The first water ejection device 193 includes a housing 194, a water supply pipe 195, and a plurality of ejection holes 196. That is, the slurry suction pipe 192 has a cylindrical shape, a base end portion is connected to a slurry pipe 122 (not shown), and a distal end portion is disposed to face a side portion of a slurry tank (not shown). The slurry suction pipe 124 is disposed at the center of the slurry tank 121, the slurry pipe 122 is connected to the cylindrical portion 124 a, and the enlarged diameter portion 124 b faces the conical bottom 121 b of the slurry tank 121.

  The slurry suction pipe 192 has a housing 194 fixed to the outer peripheral portion so as to cover the outer peripheral side of the slurry suction pipe 192. The housing 194 has a ring shape, is disposed outside the slurry suction pipe 192 at a predetermined interval, and has a sealed hollow shape with the upper end and the lower end closed. The housing 194 is connected to the end of the water supply pipe 195.

  The housing 194 has a plurality of ejection holes 196 formed at the lower end thereof. Each of the ejection holes 196 is formed in the lower end portion of the housing 194 at a plurality of predetermined intervals along the circumferential direction. Each of the ejection holes 196 can eject the slurry water in the housing 194 toward the center line O of the slurry suction pipe 124 in the suction area A of the slurry suction pipe 192.

  Therefore, when the slurry water is supplied from the supply pipe 195 to the housing 194, the slurry water is jetted toward the suction region A from the plurality of jet holes 196 formed at the front end portion of the housing 194. Therefore, the granulated slag accumulated at the bottom of the slurry tank is scattered by the slurry water from each ejection hole 196. As a result, the granulated slag is scattered at the bottom of the slurry tank, so that the concentration of the granulated slag in the slurry decreases, the amount of the granulated slag sucked into the slurry pipe from the slurry suction pipe 192 is optimized, and the water Blockage of the slurry piping due to crushed slag is prevented.

  Thus, in the slurry conveying apparatus of Example 4, the slurry suction pipe 192 is a cylindrical pipe, and slurry water is ejected toward the outer peripheral portion toward the center side of the suction region A of the slurry suction pipe 192. A water ejection device 193 is provided.

  Accordingly, since the slurry water is ejected toward the center side of the suction area A of the slurry suction pipe 192 by the first water ejection device 193, the granulated slag in the slurry is scattered, so that the suction area of the slurry suction pipe 192 The density | concentration of the granulated slag in A falls and it can suppress obstruction | occlusion of slurry piping.

  In each of the above-described embodiments, the slurry conveyance device of the present invention has been described as applied to a slag discharge system in a coal gasification combined power generation facility, but is not limited to this field, for example, gravel conveyance It can also be applied to transportation of sludge and sludge.

DESCRIPTION OF SYMBOLS 10 Coal gasification combined cycle power generation equipment 11 Coal supply apparatus 12 Fluidized bed drying apparatus 13 Pulverized coal machine 14 Coal gasification furnace 15 Char recovery apparatus 16 Gas refinement apparatus 17 Gas turbine equipment 18 Steam turbine equipment 19 Generator 20 Exhaust heat recovery boiler 48 Slag discharge system 101 Slag hole 102 Slag hopper 103 Open / close valve 104 Slag lock hopper 105 Slag reservoir 106, 171, 181, 191 Slurry conveying device 107 Slag storage tank 111 Open / close valve 112 Slag reservoir tank 113 Slag conveyor 121 Slurry tank 122 Slurry piping 123 Slurry Pump 124, 192 Slurry suction pipe 151, 193 First water ejection device (first fluid ejection device)
152,194 Housing 153,174,195 Water supply pipe (fluid supply pipe)
154,196 ejection hole 161 second water ejection device (second fluid ejection device)
162, 173 injection nozzle 172 third water ejection device (third fluid ejection device)
182 Pressure sensor 183 Control unit (control device)
201 Molten slag 202 Slag cooling water 203 Granulated slag (solid particles)
204 Slurry water (fluid)
205 Slurry 206 Discharged water

Claims (7)

A slurry tank capable of storing slurry; and
Slurry piping for conveying the slurry stored in the slurry tank;
A slurry pump provided in the slurry pipe;
A slurry suction pipe provided at the most upstream portion in the slurry conveying direction in the slurry pipe;
A first fluid ejection device that ejects fluid from an outer peripheral portion of the slurry suction pipe toward the center side of the suction area of the slurry suction pipe;
A slurry conveying apparatus comprising:   The first fluid ejection device includes a housing disposed in a hollow shape outside the slurry suction pipe, a fluid supply pipe connected to the housing and capable of supplying a fluid, and fluid in the housing to the slurry suction pipe The slurry conveying device according to claim 1, further comprising: a plurality of ejection holes that can be ejected toward the center side of the suction region.   The slurry conveying apparatus according to claim 2, wherein the slurry suction pipe has a bell mouth shape whose tip is enlarged, and the plurality of ejection holes are formed at a tip of the slurry suction pipe.   The slurry tank has a conical shape at the center lower portion and the tip of the slurry suction pipe is opposed to the second tank. The second fluid ejection device can eject a fluid to the slurry in the slurry tank to give a turning force. The slurry conveying apparatus according to claim 1, wherein the slurry conveying apparatus is provided.   The slurry tank has a conical shape at the center lower portion and the tip of the slurry suction pipe is opposed to the third fluid. The third fluid can eject fluid from the outer periphery of the slurry tank toward the center lower portion of the slurry tank. The slurry conveying device according to any one of claims 1 to 4, further comprising a jetting device.   2. A control device capable of controlling the operation of the slurry pump and the first fluid ejection device is provided, and the control device operates the first fluid ejection device when the slurry pump is activated. 5. The slurry transport device according to any one of 5 above.   A pressure sensor for detecting the pressure in the slurry pipe and a control device capable of controlling the operation of the first fluid ejection device based on the detection result of the pressure sensor are provided, and the control device detects the pressure sensor. The slurry conveying apparatus according to any one of claims 1 to 6, wherein when the pressure in the slurry pipe becomes equal to or lower than a predetermined pressure set in advance, the first fluid ejection device is operated.

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