JP2014228156A - Slag breaking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively break agglomerate slag with a simple construction while preventing a hammer from being deformed due to heat within a fusion furnace.SOLUTION: A slag breaking device 200 includes a bar-like hammer 210, a driving part 220 arranged outside a fusion furnace 140 and reciprocating a hammer 210 between the outside and the inside of the fusion furnace 140 by moving the hammer 210, and a cooling medium tank 240 in a positional relation in which the hammer 210 is immersed in cooling medium while the hammer 210 is placed outside the fusion furnace 140 by the driving part 220.

Description

  The present invention relates to a slag breaker that breaks bulk slag generated in a gasification furnace, a reforming furnace, a tar decomposition furnace, and a melting furnace.

  A melting furnace is known in which ash produced by incineration of industrial raw materials, waste, sewage sludge and the like is melted at a high temperature of 1000 ° C. or higher to form molten slag. Such a melting furnace is provided with an inclined portion that is inclined so that its cross section gradually decreases toward a discharge port formed in the lower portion, and the molten slag is aggregated in the inclined portion, and the aggregated molten slag is Then, it will be guided to the discharge port through the inclined portion. In addition, a water granulating device including a water tank is provided below the discharge port, and the molten slag discharged through the discharge port is cooled by water stored in the water tank to become a solid. Is re-used as a raw material for cement, a material for civil engineering and building materials, a glass raw material, etc. through a particle size adjustment process.

  In the melting furnace described above, the fluidity of the molten slag decreases due to a decrease in the temperature in the melting furnace, and the molten slag may stay in the inclined portion and become a lump, and the lump of the lump (bulk slag) May cause the outlet to be blocked.

  Therefore, a slag breaking device including a hammer and a cylinder is provided outside the melting furnace, and when a massive slag is generated in the melting furnace, the cylinder is driven to push out the hammer and the hammer protrudes into the melting furnace. A technique for breaking and removing massive slag by causing it to collide with massive slag is disclosed (for example, Patent Document 1).

  In addition, a scraping bar for scraping the bulk slag and a drive unit for extending and rotating the scraping bar are provided outside the melting furnace, and when the bulk slag is generated in the melting furnace, the drive unit is driven. Then, a technique is disclosed in which the scraping bar is pushed out to protrude into the melting furnace, and the scraping bar is further rotated to scrape and remove the massive slag (for example, Patent Document 2).

  Since such a hammer and scraper are made of metal, they may be deformed when exposed to a high temperature atmosphere of 1000 ° C. or higher such as in a melting furnace. Therefore, Patent Document 2 describes a configuration in which a nozzle for injecting water is provided in the melting furnace, and when the scraping bar is located in the melting furnace, water is injected into the scraping bar and cooled. ing.

  However, when water is injected in the melting furnace, the temperature in the melting furnace is lowered by the injected water, and there is a possibility that the amount of generated slag is increased. If it does so, the obstruction | occlusion probability of the discharge port by massive slag will raise.

  Therefore, a technique for heating and melting the massive slag with the burner while preventing the deformation of the burner due to heat in the melting furnace by circulating a cooling fluid inside the slag melting oxygen burner is disclosed (for example, Patent Document 3).

JP 2003-302024 A Japanese Patent No. 3120063 JP 2011-252695 A

  A configuration in which the deformation of the hammer due to the heat in the melting furnace is prevented by using the technique of Patent Document 3 described above to circulate a cooling fluid inside the hammer. However, in the configuration in which the coolant is circulated inside the hammer, the internal structure of the hammer becomes complicated, and the cost required for manufacturing increases.

  The present invention has been made in view of such problems, and an object thereof is to provide a slag breaker capable of breaking a massive slag efficiently with a simple configuration while preventing deformation of the hammer due to heat in the melting furnace. It is said.

  In order to solve the above problems, the slag breaking device of the present invention breaks up the massive slag generated in a melting furnace in which ash is introduced together with gas and the gas is burned to melt the ash and generate molten slag. A slag breaking device, which is a rod-shaped hammer, arranged outside the melting furnace, moving the hammer, a drive unit for reciprocating the hammer between the melting furnace and the melting furnace, and storing the refrigerant, And a refrigerant tank having a positional relationship in which the hammer is immersed in the refrigerant while the hammer is positioned outside the melting furnace by the driving unit.

  In addition, a water tank for storing water for cooling the molten slag generated by the melting furnace is provided below the melting furnace, and a refrigerant introduction unit that introduces water stored in the water tank as a refrigerant into the refrigerant tank is further provided. It may be provided.

  In addition, a valve is provided to communicate between the inside of the melting furnace and the outside of the melting furnace, or to block communication between the inside of the melting furnace and the outside of the melting furnace, and the drive unit communicates with the inside of the melting furnace and the outside of the melting furnace. The hammer may be reciprocated between the outside of the melting furnace and the inside of the melting furnace through the opening of the valve.

  According to the present invention, it is possible to efficiently break the massive slag with a simple configuration while preventing deformation of the hammer due to heat in the melting furnace.

It is a figure for demonstrating a gasification gas production | generation system. It is a figure for demonstrating a reforming apparatus. It is a figure for demonstrating a refinement | purification apparatus. It is a figure for demonstrating a slag breaking device. It is a figure for demonstrating the front-end | tip shape of a hammer. It is a flowchart for demonstrating the flow of a process of the slag breaking method. It is a figure for demonstrating the slag breaking device concerning a modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  2. Description of the Related Art In recent years, technologies for gasifying gasified raw materials such as coal, petroleum coke, biomass, and tire chips to generate gasified gas have been developed. The gasified gas thus generated is used for power generation systems, hydrogen production, synthetic fuel (synthetic petroleum) production, chemical fertilizer (urea) and other chemical products.

  As a technique for generating a gasification gas, a gasification gas generation apparatus that gasifies a gasification raw material with heat of a heated fluidized medium has been developed. The gasification gas generated by such a gasification gas generator includes tar derived from the gasification raw material, fuel combustion ash used to heat the fluidizing medium, and the fluidizing medium. For this reason, a reforming furnace (melting furnace) is used to decompose tar from gasification gas and remove combustion ash and fluidized medium.

  In such a melting furnace, when the temperature in a melting furnace falls, the fluidity | liquidity of molten slag falls, there exists a possibility that molten slag may stay and it may become a lump and may block | close a discharge port. Therefore, in the present embodiment, a slag breaking device will be described in which a massive slag generated in the melting furnace is impacted and broken. Hereinafter, first, a gasification gas generation system including a reforming furnace functioning as a melting furnace will be described, and then a slag breaking device will be described in detail.

(Gasified gas generation system 100)
FIG. 1 is a diagram for explaining a gasification gas generation system 100. As shown in FIG. 1, the gasification gas generation system 100 includes a gasification gas generation device 110, a reformer 130, and a purification device 180. In FIG. 1, the flow of the gasification raw material, gas, water vapor, air, and oxidant is indicated by solid arrows, and the flow of the fluid medium (sand) is indicated by dashed-dotted arrows.

(Gasified gas generator 110)
The gasified gas generator 110 includes a combustion furnace 112, a medium separator (cyclone) 114, and a gasifier 116. The gasified gas generator 110 is a circulating fluidized bed gasification system, and as a whole, a fluid medium composed of sand such as dredged sand (silica sand) having a particle size of about 300 μm is circulated as a heat medium. More specifically, the fluid medium is first heated to about 900 ° C. to 1000 ° C. in the combustion furnace 112 and introduced into the medium separator 114 together with the combustion exhaust gas EX. In the medium separation device 114, the high-temperature fluid medium and the combustion exhaust gas EX are separated, and the separated combustion exhaust gas EX is heat-recovered by a heat exchanger (for example, a boiler) or the like (not shown), and then sent to the outside. Discharged.

  On the other hand, the high-temperature fluid medium separated by the medium separator 114 is introduced into the gasification furnace 116. Then, the fluidized medium introduced into the gasification furnace 116 is fluidized by a gasifying agent (water vapor) introduced from the bottom surface of the gasification furnace 116, and finally returned to the combustion furnace 112.

  The gasification furnace 116 is, for example, a bubble fluidized bed (bubbling fluidized bed) gasification furnace, and a gasification raw material such as a solid raw material such as coal such as lignite, petroleum coke, biomass, tire chips, or a liquid raw material such as black liquor. Is gasified at 700 ° C. to 900 ° C. to generate a gasified gas. In the present embodiment, by supplying water vapor to the gasification furnace 116, the gasification raw material is gasified to generate gasified gas (water vapor gasification).

  Here, the gasification furnace 116 has been described by taking a circulating fluidized bed system as an example. However, if the gasification raw material can be gasified, the gasification furnace 116 may be a simple fluidized bed system or a sand having its own weight. The moving bed method may be used in which the moving bed is formed by flowing downward in the vertical direction.

  Since the gasification gas X1 generated in the gasification furnace 116 contains tar, combustion ash, fluid medium, water vapor, and the like, the gasification gas X1 is sent to the downstream reformer 130 and the refiner 180 for purification. Hereinafter, the combustion ash and fluid medium contained in the gasification gas X1 are referred to as “ash”.

(Reformer 130)
FIG. 2 is a view for explaining the reformer 130. The reformer 130 includes a reforming furnace 140 and a water granulator 160. In FIG. 2, the flow of substances such as gas, slag, and water is indicated by solid arrows, and the flow of signals is indicated by broken arrows.

  As shown in FIG. 2, the reforming furnace 140 includes a main body 142 and an oxidant introduction unit 150. The main body 142 includes a cylindrical upper portion 144 (for example, a cylindrical shape) whose central axis is in a vertical direction (Z-axis direction in FIG. 2), and an upper opening 146a having a smaller diameter than the lower opening 144a in the main body upper portion 144. The main body lower portion 146 is located vertically below the main body upper portion 144, and the lower opening 144a of the main body upper portion 144 is connected to the upper opening 146a of the main body lower portion 146. Moreover, the lower end 146b of the main body lower part 146 is water-sealed by the water tank 162 of the water granulator 160 mentioned later.

  Of the main body 142, the main body upper portion 144 and the inclined portion 148 are made of a refractory material (indicated by cross-hatching in FIG. 2) made of alumina or silica, and the lower body portion 146 is made of metal. Moreover, in order to give heat resistance to the main body lower part 146, the cooling pipe which cools a wall surface by distribute | circulating water is arrange | positioned. In addition, the said wall surface may be comprised with a metal wall, if it has heat resistance.

  An introduction port 144b is provided in the upper side of the main body upper portion 144, and the gasification gas X1 is introduced from the gasification furnace 116 to the main body upper portion 144 (main body 142) through the introduction port 144b. Further, an oxidant introduction unit 150 is provided on the upper portion of the main body upper portion 144, and the oxidant introduction unit 150 introduces an oxidant (for example, oxygen) into the main body 142.

  As described above, when the gasification gas X1 is introduced through the introduction port 144b and the oxidant is introduced by the oxidant introduction unit 150, one of the combustion gases (for example, hydrogen) in the gasification gas X1 is caused by the oxidant. The portion is combusted (oxidized), the gasification gas X1 is heated to about 900 ° C. to 1500 ° C., and the tar contained in the gasification gas X1 is reformed (oxidation reforming).

  Further, the ash contained in the gasification gas X1 together with the tar is melted by the heat of the gasification gas X1 to become a molten slag MS and is removed from the gasification gas X1.

  In this way, the gasified gas X2 from which tar and ash have been removed is sent to the subsequent purification device 180 through the delivery port 146c provided on the side surface of the main body lower part 146. On the other hand, the molten slag MS melted by the heat of the gasified gas X1 is collected in the inclined portion 148, flows down through the inclined portion 148, and falls into the water tank 162.

  The water granulator 160 includes a water tank 162 and a delivery mechanism 164. Water is stored in the water tank 162, and the lower end 146b of the lower body 146 of the reforming furnace 140 described above is sealed with water. Further, the molten slag MS that has flowed down the inclined portion 148 of the reforming furnace 140 and dropped is introduced into the water tank 162 and cooled by the water contained in the water tank 162 to be solid (solid slag SS, in FIG. (Shown by hatching).

  The delivery mechanism 164 is composed of, for example, a conveyor, and sends slag (solid slag SS) that has become solid in the water tank 162 to the outside. Thus, the sent solid slag SS is reused as a cement raw material, a material for civil engineering and building materials, a glass raw material, and the like through steps such as particle size adjustment.

(Purification device 180)
FIG. 3 is a diagram for explaining the purification apparatus 180. As shown in FIG. 3, the refining device 180 includes a heat exchanger 182, a first cooler 184, a second cooler 186, a booster 188, a wastewater treatment device 190, a desulfurizer 192, and a deammonia. It comprises a vessel 194 and a desalter 196. The desulfurizer 192, the deammonizer 194, and the demineralizer 196 can be changed in installation order and presence / absence according to the use of the gasification gas X2 and the type of gasification raw material.

  The heat exchanger 182 performs heat exchange between the gasification gas X2 introduced from the reforming furnace 140 and water vapor, that is, recovers the sensible heat of the gasification gas X2 with water vapor, and sets the outlet temperature of the gasification gas X2 to Set to 300 ° C to 600 ° C.

  The 1st cooler 184 further cools the gasification gas X2 which became 300 to 600 degreeC by spraying water. Thereby, tar and dust (ash) remaining in the gasification gas X2 are condensed and removed from the gasification gas X2.

  The second cooler 186 further cools the gasification gas X2 to 30 ° C. or lower using seawater, brine, etc., and further condenses and removes remaining tar and dust. In addition, a mist / dust remover composed of an electric dust collector or the like can be provided after the second cooler 186 to further remove tar and dust.

  The booster 188 includes a blower, a compressor, a turbo pump, a positive displacement pump, and the like, and boosts the gasified gas X2 that has passed through the second cooler 186 to 0.1 MPa to 5 MPa. A cooler that cools the gasification gas X2 to 30 ° C. or lower can be provided after the booster 188 to further remove tar and dust.

  The waste water treatment device 190 performs a process of removing tar and dust from waste water containing tar and dust generated by the first cooler 184, the second cooler 186, and the booster 188. Water (treated water) after being treated by the waste water treatment device 190 is reused by the heat exchanger 182 and the first cooler 184.

  The desulfurizer 192 removes sulfur and sulfur compounds remaining in the gasification gas X2. The deammonizer 194 removes nitrogen compounds such as ammonia in the gasification gas X2. The desalter 196 removes chlorine and chlorine compounds in the gasification gas X2.

  As described above, the gasification gas X2 that is generated by the gasification gas generator 110 and from which the tar, combustion ash, and the fluidized medium have been removed by the reforming furnace 140 is the heat exchanger 182, the first cooler 184, and the second cooling. Tar, combustion ash, and fluidized medium are removed by the vacuum vessel 186 and the booster 188, sulfur and sulfur compounds are removed by the desulfurizer 192, ammonia and ammonia compounds are removed by the deammonizer 194, and chlorine and chlorine compounds are removed by the demineralizer 196. By being removed, the gas is purified and becomes a purified gasification gas.

(Slag breaking device 200)
Returning to FIG. 2, as described above, the reforming furnace 140 melts the ash into the molten slag MS and flows down the inclined portion 148 and introduces it into the water granulator 160. Due to a decrease in the temperature of X1 or a decrease in the amount of oxidant introduced by the oxidant introduction unit 150, the temperature of the reforming furnace 140 may be lower than in normal operation, and the fluidity of the molten slag MS may be reduced. . Then, the molten slag MS stays in the inclined portion 148 and becomes a lump (lump slag LS, indicated by black filling in FIG. 2), which may block the inclined portion 148 and the upper opening 146a of the main body lower portion 146. .

  Therefore, the slag breaking device 200 according to this embodiment gives an impact to the massive slag LS generated in the reforming furnace 140, and breaks and removes the massive slag LS. Hereinafter, a specific configuration of the slag breaking device 200 will be described.

  FIG. 4 is a diagram for explaining the slag breaking device 200. As shown in FIG. 4, the slag breaking device 200 is provided outside the reforming furnace 140, and includes a hammer 210, a drive unit 220, a valve 230, a refrigerant tank 240, a control unit 250, a liquid level meter 260, and the like. And the refrigerant introduction part 270. In FIG. 4, the flow of substances such as water is indicated by solid arrows, and the flow of signals is indicated by broken arrows. The slag breaking device 200 has a housing state in which the hammer 210 is held outside the reforming furnace 140 (see FIG. 4A) and a protrusion that causes the hammer 210 to protrude into the reforming furnace 140 by trying to break the massive slag LS. Transition to the state (see FIG. 4B). In addition, a plurality of slag breaking devices 200 (for example, four at 90 ° intervals) may be provided in the circumferential direction of the reforming furnace 140. Here, in order to facilitate understanding, one slag breaking device 200 among the plurality of slag breaking devices 200 provided in the reforming furnace 140 is illustrated.

  The hammer 210 is a rod-shaped member made of metal. The drive unit 220 is disposed outside the reforming furnace 140 and causes the hammer 210 to project into the reforming furnace 140 by linearly moving the hammer 210 in accordance with a control command from the control unit 250 described later (see FIG. 4 (b) protruding state). More specifically, the main body lower part 146 of the reforming furnace 140 is provided with a through passage 146d, and the hammer 210 reciprocates between the outside of the reforming furnace 140 and the inside of the reforming furnace 140 through the through passage 146d. .

  In addition, a valve 230 including a ball valve and a stop valve is provided outside the reforming furnace 140 in the through passage 146d. When the hammer 210 protrudes, the valve 230 is opened and the through passage 146d ( The inside of the reforming furnace 140 is communicated with the outside of the reforming furnace 140, and when the hammer 210 is housed, the valve 230 is closed and the through-passage 146d and the outside of the reforming furnace 140 are shut off.

  Specifically, the hammer 210 and the drive unit 220 are constituted by, for example, a gas cylinder, and the hammer 210 functions as a cylinder rod. The driving unit 220 includes, for example, a cylinder 222, a gas supply source that moves the hammer 210 by supplying gas (for example, air, nitrogen) to a piston side chamber or a rod side chamber formed in the cylinder 222, and the cylinder 222. The valve 226 and the valve 228 are configured to maintain or cut off the connection between the gas supply source and the gas supply source. Here, the gas supply source is, for example, a compressed (high pressure) gas line used in another facility of the gasification gas generation system 100.

  FIG. 5 is a view for explaining the tip shape of the hammer 210. When a commercially available gas cylinder is used as the hammer 210 and the drive unit 220 and the cylinder rod 210a is thinned (a space is formed inside), FIGS. 5A and 5B are used. As shown in FIG. 3, a cylindrical metal rod 210b may be joined to the tip of the cylinder rod 210a to form a hammer 210. When joining the metal rod 210b, the diameter HD of the metal rod 210b is preferably 1/2 times (FIG. 5 (a)) to 1 time (FIG. 5 (b)) of the diameter SD of the cylinder rod 210a. .

  If the diameter HD of the metal rod 210b is less than ½ times the diameter SD of the cylinder rod 210a, the metal rod 210b may not collide with the massive slag LS or may be deformed due to the collision with the massive slag LS. is there.

  Further, when the diameter HD of the metal rod 210b exceeds 1 times the diameter SD of the cylinder rod 210a, the collision force with the massive slag LS becomes small (the surface pressure is small), and there is a possibility that the massive slag LS cannot be efficiently broken. Because there is.

  In addition, when the cylinder rod 210a is not thinned, it may be used as the hammer 210 without being processed, or only the tip is cut and the diameter SD of the tip is ½ times the diameter of the cylinder rod 210a. It is good also as less than 1 time.

  Referring back to FIG. 4, the refrigerant tank 240 is a tank that stores a refrigerant (for example, water), and is in a storage state while the hammer 210 is positioned outside the reforming furnace 140 by the driving unit 220. For a while, the refrigerant is stored so that the hammer 210 is in a positional relationship soaked in the refrigerant. In the present embodiment, the lengths of the refrigerant tank 240 in the X direction and the Y direction are large enough to accommodate the hammer 210 and the cylinder 222, that is, large enough to immerse the hammer 210 and the cylinder 222 in the refrigerant. It is. However, the refrigerant tank 240 may have a size that allows at least the hammer 210 to be immersed in the refrigerant.

  Moreover, in order to suppress the temperature drop of the inclined portion 148 due to the refrigerant, it is preferable that the area where the refrigerant accommodated in the refrigerant tank 240 is in contact with the lower body portion 146 is as small as possible.

  With the configuration including the refrigerant tank 240, the hammer 210 heated in the reforming furnace 140 can be cooled with a simple configuration in which the hammer 210 is simply immersed in the refrigerant, and deformation of the hammer 210 can be suppressed. It becomes. Further, when the hammer 210 is moved in an attempt to break the massive slag LS, the time for the hammer 210 to be arranged in the reforming furnace 140 is as short as about 1 to 2 seconds. Even when the cooling is performed outside the reforming furnace 140, the hammer 210 can be prevented from being overheated sufficiently.

  The control unit 250 is composed of a semiconductor integrated circuit including a CPU (Central Processing Unit), reads out programs and parameters for operating the CPU itself from the ROM, and cooperates with the RAM as a work area and other electronic circuits. To manage and control the entire slag breaking device 200. In the present embodiment, the control unit 250 controls the drive unit 220, the valve 230, and a refrigerant introduction unit 270 described later. Control of the drive unit 220, the valve 230, and the refrigerant introduction unit 270 by the control unit 250 will be described in detail later.

  The liquid level meter 260 measures the liquid level of the refrigerant stored in the refrigerant tank 240. The refrigerant introduction unit 270 is configured by a pump, and introduces water stored in the water tank 162 of the water granulating device 160 into the refrigerant tank 240 in accordance with a control command of the control unit 250.

  When the liquid level measured by the liquid level meter 260 becomes less than a predetermined liquid level, the control unit 250 drives the refrigerant introduction unit 270 to introduce water contained in the water tank 162 into the refrigerant tank 240. . Here, the predetermined liquid level can be immersed in the hammer 210 even if the refrigerant flows into the reforming furnace 140 from the through passage 146d by opening the valve 230, and the through passage 146d is sealed with the refrigerant. The lower limit value of the liquid level that can be stopped is, for example, 300 mm to 400 mm vertically upward with respect to the position of the hammer 210.

  The control unit 250 maintains the liquid level in the refrigerant tank 240 at such a level that the hammer 210 can be immersed even if the refrigerant flows into the reforming furnace 140 from the gap between the through-passage 146d and the hammer 210. The hammer 210 can be reliably cooled by the refrigerant tank 240. Even while the valve 230 is open, the gap between the through-passage 146d and the hammer 210 is narrower than the opening of the valve 230, so the amount of refrigerant flowing into the reforming furnace 140 is relatively small. There are few.

  Further, the control unit 250 maintains the liquid level in the refrigerant tank 240 at such a level that the through-passage 146d can be sealed with the refrigerant, so that the gasification gas X1 leaks out of the reforming furnace 140. Can be avoided. Further, since the refrigerant introduction unit 270 introduces the water of the existing water tank 162 into the refrigerant tank 240, it is not necessary to separately secure a water source dedicated to the refrigerant tank 240, and the slag breaking device 200 can be simplified.

(Slag breaking method)
Next, a slag breaking method using the slag breaking device 200 will be described. FIG. 6 is a flowchart for explaining the flow of processing of the slag breaking method. In the initial state, the slag breaking device 200 closes the valve 230, and the drive unit 220 stops the movement of the hammer 210, that is, the hammer 210 is in the stored state. Further, the liquid level meter 260 constantly measures the liquid level in the refrigerant tank 240, and the control unit 250 determines the liquid level in the refrigerant tank 240 in advance based on the liquid level measured by the liquid level meter 260. It shall be maintained at a liquid level.

  As shown in FIG. 6, first, the control unit 250 determines that the difference between the pressure of the upper opening 146a and the pressure of the delivery port 146c in the reforming furnace 140 (differential pressure between the upper opening 146a and the delivery port 146c) in advance. It is determined whether or not there is a massive slag LS that is equal to or higher than the predetermined pressure P and near the upper opening 146a (step S310).

  The differential pressure between the upper opening 146a and the delivery port 146c may be measured with a pressure gauge (not shown). Further, whether or not there is a massive slag LS near the upper opening 146a is visually confirmed by an operator through a viewing window (not shown) provided in the main body 142, and the control unit 250 according to an operation input of the operator. Whether or not there is a massive slag LS near the upper opening 146a by providing an imaging device that captures the vicinity of the upper opening 146a and analyzing the image captured by the control unit 250. It may be determined whether or not.

  When it is determined that the pressure difference between the upper opening 146a and the outlet 146c is equal to or higher than the pressure P and there is a massive slag LS near the upper opening 146a (YES in step S310), the control unit 250 causes the valve 230 to In the open state (step S312), the driving unit 220 is controlled to move (reciprocate) the hammer 210 between the reforming furnace 140 and the reforming furnace 140, and an impact is applied to the massive slag LS, thereby causing the massive slag LS. (Step S314).

  The controller 250 determines whether or not the pressure difference between the upper opening 146a and the outlet 146c is equal to or higher than the pressure P and there is a massive slag LS near the upper opening 146a (step S316). When the differential pressure with respect to the delivery port 146c is equal to or higher than the pressure P and there is a massive slag LS near the upper opening 146a (YES in step S316), the process returns to step S314.

  On the other hand, when the pressure difference between the upper opening 146a and the outlet 146c is not equal to or higher than the pressure P, or when there is no massive slag LS near the upper opening 146a (NO in step S316), there is no problem in the operation of the reforming furnace 140. Assuming that the massive slag LS has been removed to the extent, the movement of the hammer 210 by the drive unit 220 is stopped (step S318), the valve 230 is closed (step S320), and the process returns to step S310.

  As described above, according to the slag breaking device 200 and the slag breaking method using the slag breaking device 200 according to the present embodiment, with a simple configuration, the deformation of the hammer 210 due to the heat in the reforming furnace 140 is prevented and the lump shape is obtained. The increase in the slag LS can be suppressed, and the massive slag LS can be efficiently broken down.

  Further, by closing the valve 230, the hammer 210 and the drive unit 220 can be separated from the inside of the reforming furnace 140. Even when the reforming furnace 140 is in operation, the hammer 210 and the driving unit 220 are in operation. Can be maintained.

(Modification)
FIG. 7 is a diagram for explaining a slag breaking device 400 according to a modification. As shown in FIG. 7, the slag breaking device 400 is provided outside the reforming furnace 140 and includes a hammer 210, a drive unit 220, a control unit 250, and a water tank 162. In FIG. 7, the flow of substances such as slag and water is indicated by solid arrows, and the flow of signals is indicated by broken arrows.

  As shown in FIG. 7, in the slag breaking device 400 according to the modified example, when the hammer 210 is disposed outside the reforming furnace 140 by the driving unit 220 in the water tank 162 constituting the reforming device 130, the hammer 210 is a refrigerant. It is made to function as a refrigerant tank which stores a refrigerant so that it may be immersed in.

  By using the existing water tank 162 as a refrigerant tank for cooling the hammer 210, a cooling tank dedicated to cooling the hammer 210 and a refrigerant introduction part for introducing the refrigerant into the storage tank become unnecessary, and the configuration is further simplified. And cost can be reduced.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Is done.

  For example, in the above-described embodiment, the configuration in which the slag breaking devices 200 and 400 are applied to the reforming furnace 140 that melts the ash contained in the gasified gas has been described as an example. However, the slag breaking devices 200 and 400 can be applied to any melting furnace as long as the melting slag LS is generated. For example, the ash produced by incineration of industrial raw materials, waste, sewage sludge, etc. can be applied to a melting furnace that is melted at a high temperature of 1000 ° C. or more to form a molten slag MS.

  In the above-described embodiment, the driving unit 220 moves the hammer 210 linearly. However, the driving unit 220 may move the hammer 210 along any trajectory as long as the hammer 210 can be moved.

  In the above-described embodiment, the case where the hammer 210 and the drive unit 220 are configured by a double-acting gas cylinder has been described as an example. However, the cylinder 222 includes an elastic body such as a spring, and the elastic body causes the hammer to It may be configured by a single-acting gas cylinder that performs either one of the protrusion 210 or the storage (retraction) 210 and the other by supplying gas.

  INDUSTRIAL APPLICABILITY The present invention can be used for a slag breaking device that breaks up bulk slag generated in a gasification furnace, a reforming furnace, a tar decomposition furnace, and a melting furnace.

140 Reforming furnace (melting furnace)
162 Water tank (refrigerant tank)
200, 400 Slag breaker 210 Hammer 220 Drive unit 230 Valve 240 Refrigerant tank 270 Refrigerant introduction unit

Claims (3)

A slag breaking device for breaking lumpy slag generated in a melting furnace that introduces ash together with gas and burns the gas to melt the ash and generate molten slag,
A hammer that is rod-shaped,
A drive unit disposed outside the melting furnace and moving the hammer to reciprocate the hammer between the outside of the melting furnace and the inside of the melting furnace;
Refrigerant is stored, and while the hammer is positioned outside the melting furnace by the drive unit, the refrigerant tank is in a positional relationship in which the hammer is immersed in the refrigerant;
A slag breaking device characterized by comprising: Below the melting furnace, a water tank is provided for containing water for cooling the molten slag generated by the melting furnace,
The slag breaking device according to claim 1, further comprising a refrigerant introduction part that introduces water contained in the water tank as a refrigerant into the refrigerant tank. A valve that communicates between the inside of the melting furnace and the outside of the melting furnace, or that blocks communication between the inside of the melting furnace and the outside of the melting furnace,
The drive unit reciprocates the hammer between the outside of the melting furnace and the inside of the melting furnace through the opening of the valve when the valve communicates between the inside of the melting furnace and the outside of the melting furnace. The slag breaking device according to claim 1 or 2, characterized in that.

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