JP2010175154A - Water-cooled stoker furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-cooled stoker furnace having a structure adaptable to high temperature reduction processing and usable as a gasification furnace of a gasification melting furnace. <P>SOLUTION: The water-cooled stoker furnace includes a frame integrated-type grate having a casing frame 41 with a water cooling inner space and a rod frame 42 connected to the casing frame 41 and having an inner flow passage communicated with the water cooling inner space. The rod frame 42 is extended to the outside of the furnace, and a water flowing port and a water discharge port of the inner flow passage are provided outside the furnace. A driving part for reciprocating a movable grate 4a is installed outside the furnace and is driven and connected to the rod frame 42 outside the furnace. The rod frame 42 is extended to the lateral side of the rear end of the casing frame 41 and is penetrated through a through-hole formed on a furnace body lateral wall 5. The furnace body lateral wall 5 includes a slide seal mechanism slidably supported with the through-hole through which the rod frame 42 is penetrated while being closed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a water-cooled stoker furnace suitable for high-temperature reduction treatment of an object to be treated.

  In recent years, development of a pyrolysis gasification melting furnace for garbage has been actively promoted. The pyrolysis gasification melting furnace is pyrolyzed into combustible gas, char and inorganic matter by steaming the object to be treated such as garbage in a high temperature reducing atmosphere of about 500 ° C. The generated pyrolysis gas is usually a gas It is used as a fuel for the chemical melting furnace and burned with char supplied from a separate line at a high temperature of 1300 ° C. or higher to slag the ash.

  One type of pyrolysis gasification and melting furnace is a combination of a gasification furnace and a melting furnace. For example, pyrolysis gas generated in a pyrolysis drum such as a rotary kiln furnace can be used in a subsequent high-temperature combustion melting furnace. One that burns with char supplied from another line to slag ash is known (for example, Patent Document 1).

  However, since the rotary kiln furnace rotates the inclined pyrolysis drum and conveys the workpiece, the workpiece receives a drop impact. Due to this impact, in the case of a fragile workpiece, the shape is changed or crushed in the pyrolysis drum. There is no problem when the shape of the processed object after processing is not questioned, but it is not suitable for an object to be processed and desired to avoid deformation and crushing, such as steelmaking dust obtained by processing powder into pellets.

  Therefore, instead of a rotary kiln furnace, a furnace having a gradual conveyance and an appropriate stirring function and having a stalker like a stalker-type incinerator regardless of the properties of an object to be treated (hereinafter referred to as a “stalker furnace”). Can be considered.

  When high-temperature reduction treatment is attempted using such a stoker furnace, it is considered effective to supply a high-temperature low-oxygen gas from the lower part of the grate.

  However, in general, conventional stoker-type incinerators are designed for the purpose of solid combustion on the upper surface of the grate because the combustion air supplied from the lower side of the grate is at most about 300 ° C. The back surface is not designed to withstand high temperatures of 500 ° C or higher. Even a water-cooled grate used for fuel with a high calorific value (for example, Patent Documents 2 to 6) is not designed to withstand the high temperature of 500 ° C. or higher on the back side of the grate. Therefore, when applying a conventional stoker-type incinerator to perform a high-temperature reduction treatment, the frame supporting the grate will be thermally damaged.

JP 2001-27411 A Japanese Patent No. 3715430 Japanese Patent No. 2931958 Japanese Patent No. 3990463 Japanese Patent No. 396790 Japanese Patent No. 3838639

  It is an object of the present invention to provide a water-cooled stoker furnace that can be used as a gasification furnace of a gasification melting furnace as a stoker furnace having a structure applicable to high-temperature reduction treatment.

  To achieve the above object, a water-cooled stoker furnace according to the present invention includes a casing frame having a water-cooling internal space, and a rod having an internal flow path extending from the casing frame to the outside of the furnace and communicating with the water-cooling internal space. The rod frame includes a frame-integrated grate provided with a frame, and a flow outlet and a drain outlet of the internal flow path are provided outside the furnace.

  In one embodiment, the water-cooled stoker furnace according to the present invention is such that the grate is a movable grate, and a drive unit for reciprocating the movable grate is installed outside the furnace. Drive-coupled to the rod frame.

  Further, in another aspect of the water-cooled stoker furnace according to the present invention, the rod frame extends to a side of a rear end portion of the casing frame and penetrates a through hole formed in the side wall portion of the furnace body. The through hole is configured to allow the rod frame to reciprocate, and the furnace body side wall is connected to the rod frame and is slidable in a state of closing the through hole. A supported slide seal mechanism is provided.

  In another embodiment of the water-cooled stoker furnace according to the present invention, a plurality of rod frames of the grate are connected to the drive unit via a common intermediate connector disposed outside the furnace. .

  In another embodiment of the water-cooled stoker furnace according to the present invention, a water-cooling jacket is embedded in the side wall of the furnace body, and the through hole is formed in the water-cooling jacket.

  Moreover, the water-cooled stoker furnace according to the present invention is, in another form, provided with an inner wall that divides the water-cooling inner space into two upper and lower chambers communicating with each other inside the tip of the grate, from the lower chamber. The cooling water is configured to flow to the upper chamber.

  In another embodiment of the water-cooled stoker furnace according to the present invention, the grate has an irregular refractory or a refractory ceramic detachably attached to at least one of the upper and lower surfaces of the grate. Covered by a plate.

  Further, in another aspect of the water-cooled stoker furnace according to the present invention, the grate has a plurality of ridges extending in parallel in the front-rear direction of the grate on at least one of the upper and lower surfaces of the casing frame. And an inner surface of the ridge is a groove that forms a part of the water-cooling inner space, and the refractory ceramic plate or the irregular refractory is embedded between the parallel ridges.

  In another embodiment, the water-cooled stoker furnace according to the present invention is configured such that the grate is a movable grate and a fixed grate, and the movable grate slides on the fixed grate. A grate and a fixed grate are alternately arranged, and a contact protrudes from the lower surface of the tip of the grate, and the contact is arranged to slide on the ridge of the fixed grate. ing.

  In another embodiment, the water-cooled stoker furnace according to the present invention includes means for supplying high-temperature combustion exhaust gas having an oxygen concentration of 1% or less to the lower part of the grate.

  Moreover, the water-cooled stoker furnace according to the present invention is, in another embodiment, the high-temperature combustion gas is 500 to 1300 ° C.

  In another embodiment of the water-cooled stoker furnace according to the present invention, a burner is installed in a lower space surrounded by a fireproof wall below the grate.

  In another embodiment, the water-cooled stoker furnace according to the present invention further comprises a combustion furnace for combusting the pyrolysis gas of the object to be processed by the high-temperature combustion gas, and the high-temperature combustion exhaust gas discharged from the combustion furnace It is configured to supply to the lower part of the grate.

  A water-cooled stoker furnace according to the present invention comprises a casing frame having a water-cooling internal space, and a rod-integrated frame that includes a rod frame that extends from the casing frame to the outside of the furnace and communicates with the water-cooling internal space. The rod frame has a water flow outlet and a drain outlet of the internal flow path provided outside the furnace, so that the upper and lower surfaces of the grate and the rod frame in the furnace are water-cooled. Thus, it is possible to provide heat resistance to a high temperature gas of 500 ° C. or higher supplied from the lower part of the grate.

  In addition, a driving unit for reciprocating the movable grate is installed outside the furnace, and the driving unit is not exposed to the high temperature gas by drivingly connecting the driving unit and the rod frame outside the furnace.

  The rod frame extends to the side of the rear end portion of the casing frame and is disposed through a through hole formed in the side wall of the furnace body, and the through hole allows the rod frame to reciprocate. The furnace body side wall portion is connected to the rod frame, and is provided with a slide seal mechanism that is slidably supported in a state of closing the through hole, thereby providing a through hole. Cooling water can be supplied to the rod frame or discharged from the rod frame outside the furnace while preventing leakage of hot gas from the furnace.

  In addition, the rod frames of the plurality of grate are connected to the drive unit via a common intermediate connector disposed outside the furnace, so that the plurality of grate are collectively driven by the common drive unit. The intermediate connector is not exposed to the high temperature gas.

  Further, by embedding a water cooling jacket in the side wall of the furnace body and forming the through hole in the water cooling jacket, the vicinity of the through hole is forcibly cooled so that the fire resistance performance in the vicinity of the through hole is not impaired. Can do.

  In addition, the grate includes an inner wall that divides the water cooling internal space into two upper and lower chambers that communicate with each other inside the tip of the grate, and is configured so that cooling water flows from the lower chamber to the upper chamber. The lower surface of the high grate can be preferentially cooled.

  Moreover, the upper surface of the grate is covered with a refractory ceramic plate or an irregular refractory material, thereby preventing the object to be processed from being cooled. Moreover, when the lower surface of the grate is covered with a refractory ceramic plate or an irregular refractory, when a high temperature gas is supplied from the lower part of the grate, the temperature drop of the high temperature gas can be reduced.

  Further, by making the refractory ceramic plate detachable, the performance can be maintained for a long time only by replacing the refractory ceramic plate.

  Further, the grate has a plurality of ridges extending in the front-rear direction of the grate on both upper and lower surfaces of the casing frame, and the convex inner surface forms a part of the water cooling internal space. Therefore, by burying the refractory ceramic plate or the irregular refractory between the ridges, heat dissipation is improved, and as a result, heat resistance is improved.

  Further, the grate is a movable grate and a fixed grate, and the movable grate and the fixed grate are alternately arranged so that the movable grate slides on the fixed grate, and the grate A contact is projected on the lower surface of the front end of the lattice, and the contact is disposed so as to slide on the ridges of the fixed grate, so that the coating with the refractory ceramic plate or the irregular refractory is applied. It is possible to prevent or reduce the cracking and wear of the coating by the refractory ceramic plate or the irregular refractory by eliminating the impact.

  Further, by providing means for supplying high-temperature combustion exhaust gas having an oxygen concentration of 1% or less to the lower part of the grate, it is possible to subject the object to be treated on the grate to a high-temperature reduction treatment.

  In addition, by installing a burner in the lower space surrounded by the fire wall at the lower part of the grate, a high-temperature combustion exhaust gas having a low oxygen concentration necessary for thermal decomposition of the workpiece can be supplied to the lower part of the grate. it can. The combustion exhaust gas supplied to the lower part of the grate rises on the grate through the grate and thermally decomposes the workpiece.

  In addition, a combustion furnace for combusting the pyrolysis gas of the object to be treated by the high temperature combustion exhaust gas is provided, and the high temperature combustion exhaust gas discharged from the combustion furnace is supplied to the lower part of the grate, thereby improving thermal efficiency. Can be made.

It is a side view which shows the internal structure of the water-cooled stoker furnace which concerns on this invention. It is a schematic block diagram which shows the example which installed the combustion furnace in the back | latter stage of the water-cooled stoker furnace of FIG. FIG. 6 is a cross-sectional view taken along the line III-III of FIG. 5 showing one embodiment of a grate. 4 is a grate of FIG. 3 and is a cross-sectional view taken along the line IV-IV of FIG. FIG. 4 is a grate cross-sectional view of FIG. It is a partially cutaway perspective view of the grate of FIG. It is the VII-VII sectional view of Drawing 8 which expands and shows the principal part of the water-cooled stoker furnace of Drawing 1. It is a side view which shows the external appearance of the water-cooled stoker furnace of FIG. It is a side view which expands and shows the slide seal mechanism which is a component of the water-cooled stoker furnace of FIG.

  A first embodiment of a water-cooled stoker furnace according to the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, a water-cooled stoker furnace 1 according to the present invention includes an inlet 2 for feeding a workpiece, a pusher 3 for pushing out the thrown workpiece, and a workpiece pushed out by the pusher 3. The grate 4 etc. which convey a processed material are provided. In the grate 4, the movable grate 4 a and the fixed grate 4 b are alternately arranged in an inclined manner. As the movable grate 4a reciprocates in the tilt direction, the objects to be processed are sequentially conveyed downstream. Note that the movable grate and the fixed grate can be alternately arranged in a staircase pattern in the horizontal direction.

  The water-cooled stoker furnace 1 in the illustrated example is a stoker furnace having a structure suitable for high-temperature reduction treatment of an object to be processed, and radiates a flame to the object to be processed on a grate like a conventional stoker-type incinerator. A starter burner is not provided, and a burner 12 that radiates a flame is installed in a wind box 11 that forms a lower space of the grate 4. The wind box 11 has a box shape with an upper opening so that the high-temperature combustion exhaust gas G can be supplied to the entire lower part of the grate 4 and is lined with a refractory.

  The burner 12 burns fuel to generate a high-temperature combustion exhaust gas having a low oxygen concentration, and supplies the generated high-temperature combustion exhaust gas G to the lower part of the grate 4. The low-temperature oxygen high-temperature combustion exhaust gas supplied to the lower part of the grate 4 passes through the gap between the movable grate 4a and the fixed grate 4b, and steams the object to be treated on the grate 4 in a high-temperature reducing atmosphere. To do.

  As the fuel for the burner 12, for example, fossil fuel, COG gas, biogas, or pyrolysis gas (dry distillation gas) generated by high-temperature reduction treatment of an object to be treated as shown by a broken line Hd in FIG. 1 is used. Is possible.

  The high-temperature combustion gas G supplied to the lower part of the grate 4 can be controlled by the temperature control means 13 to a predetermined temperature within the range of 500 to 1300 ° C. The temperature control means 13 can be configured to control the fuel injection amount of the furnace heating burner 12 based on the temperature detected by the temperature sensor S attached to the lower surface of the grate 4, for example.

  The high-temperature combustion exhaust gas supplied from the lower part of the grate 4 to the upper part of the grate 4 is preferably supplied while being controlled to an oxygen concentration of 1% or less. For example, the oxygen concentration of the high-temperature combustion exhaust gas is detected by an oxygen concentration meter (not shown) such as a laser-type oxygen concentration meter before being supplied to the lower part of the grate 4, and the detected oxygen concentration exceeds 1%. In this case, the oxygen concentration can be controlled to 1% or less by adjusting the air ratio of the combustion air supplied to the burner 12 or the air-fuel ratio of the fuel gas and the combustion air.

  As a modified mode, as shown in FIG. 2, a combustion furnace 20 for burning the pyrolysis gas generated by the high-temperature reduction treatment can be provided in the upper part of the water-cooled stoker furnace 1. The combustion furnace 20 includes an auxiliary combustion burner 20a, and can heat an object to be processed from above by burning pyrolysis gas.

  The high temperature combustion exhaust gas G discharged from the combustion furnace 20 may be supplied into the wind box 11 of the stoker furnace 1 by the blower F through the high temperature bag filter BF. The oxygen concentration of the high-temperature combustion gas G discharged from the combustion furnace 20 is about 0 to 2%, and when the oxygen concentration exceeds 1%, for example, by reducing the amount of combustion air supplied to the burner 12, Oxygen can be consumed by burning the burner 12 to lower the oxygen concentration.

  In addition, although not shown in figure, the combustion furnace 20 for burning the pyrolysis gas of the to-be-processed object by high temperature combustion exhaust gas can also be installed in the exterior of a furnace separately from a stoker furnace, and a heating apparatus provided with a burner etc. May be installed outside the stoker furnace separately from the stoker furnace, and the exhaust gas from the combustion furnace 20 is heated by the heating device and supplied to the lower part of the grate.

  In order to withstand the high temperature of the combustion exhaust gas supplied to the lower part of the grate 4, the movable grate 4 a and the fixed grate 4 b have a rectangular parallelepiped casing frame 41 having a water cooling internal space C 1 as shown in FIGS. And a rod frame 42 having an internal flow path C2 connected to the casing frame 41 and communicating with the water-cooling internal space C1, and having a structure capable of withstanding mechanical stress due to its own weight, driving force, or the like It is a body.

  The casing frame 41 can be formed of a known heat-resistant steel material such as heat-resistant alloy steel or heat-resistant cast steel, but is preferably formed of heat-resistant cast steel having improved wear resistance at high temperatures.

  Referring to FIG. 7, the rod frame 42 is connected to both sides of the rear part of each of the movable grate 4a and the fixed grate 4b, extends through the furnace body side wall 5, and extends outside the furnace. The flowing water port 42a and the drain port 42b of the flow path C2 are disposed outside the furnace. A flexible hose F is connected to each of the water flow port 42a and the water discharge port 42b to supply and drain the cooling water. The cooling water may be given a flow rate and pressure so that bubbles do not stay in the casing frame 41. The rod frame 42 can be formed of alloy steel, cast steel, or the like.

  By providing a male screw portion on the outer peripheral surface of one end portion of the rod frame 42 and providing a female screw portion to be engaged with the male screw portion in the casing frame 41 and screwing the male screw portion into the female screw portion, The rod frame 42 can be fixed to the casing frame 41. However, the rod frame 42 is fixed to the casing frame 41 using a fastener such as a bolt, or the rod frame 42 and the casing frame 41 are integrally formed by casting or the like. You can also

  As shown in FIGS. 3 to 7, the movable grate 4a and the fixed grate 4b are configured such that the water cooling inner space C1 is formed at the front end of the grate by an inner wall 41m extending in parallel with the upper wall and the bottom wall in the casing frame 41. It is divided into two chambers, an upper chamber and a lower chamber, which communicate with each other inside the section.

  One rod frame 42 connected to the casing frame 41 communicates only with the lower chamber of the water cooling internal space C1, and the other rod frame 42 connected to the casing frame 41 is above the water cooling internal space C1. Internal communication only with the chamber. Specifically, as shown in FIGS. 6 and 7, the rod frame connecting portion at the rear end of the upper chamber of the water cooling internal space C1 is closed at the inflow side, and the water cooling internal space C1 The rod frame connecting part at the rear end of the lower chamber is closed at the outflow side end. Accordingly, the cooling water flowing in through the inflow side rod frame 42 flows into the lower chamber of the water cooling inner space C1, then flows into the upper chamber of the water cooling inner space C1, and is discharged through the outflow side rod frame 42.

  The movable grate 4a and the fixed grate 4b can be covered with a refractory ceramic plate 4c on their upper and lower surfaces. Since the lower surface of the grate 4 becomes hotter than the upper surface by supplying the high-temperature combustion exhaust gas to the lower part of the grate, only the lower surface of the grate 4 can be covered with the refractory ceramic plate 4c.

  The refractory ceramic plate 4c can be detachably attached to the casing frame 41 with bolts, anchor fittings, or other fasteners (not shown).

  The movable grate 4a and the fixed grate 4b are formed with a plurality of ridges 41p extending in parallel in the front-rear direction on the upper and lower surfaces of the casing frame 41. As shown in FIG. 5, the inner surface of the ridge 41p is a ridge that forms part of the water-cooling internal space C1, so that cooling water can flow. The refractory ceramic plate 4c is embedded so as to be inserted between the ridges 41p adjacent to each other in parallel. The refractory ceramic plate 4c covering the upper surface of the casing frame 41 reduces the cooling of the workpiece. Moreover, the refractory ceramic plate 4c covering the lower surface of the casing frame 41 reduces the temperature drop of the hot gas from the lower part of the grate.

  In addition, it can replace with the refractory ceramic plate 4c, and can also coat | cover by embedding an irregular-shaped refractory between the adjacent protruding item | line 41p and the protruding item | line 41p. Examples of the irregular refractories include castable refractories and plastic refractories, and these refractories are buried between adjacent ridges 41p by projecting, painting, press fitting, or the like. By doing so, the casing frame 41 can be covered.

  A contact 4 d protrudes from the lower surface of the tip of the grate 4. The contact 4d is disposed so as to slide on the ridge 41p of the grate 4. The contact 4 d can be formed of the same material as the casing frame 41, for example, heat-resistant cast steel, or can be integrally formed with the casing frame 41. As the contact 4d slides on the ridge 41p cooled by the cooling water, the wear of the contact 4d and the casing frame 41 can be reduced. The contact 4d creates a gap between the movable grate 4a and the fixed grate 4b, and the gas G can escape from the lower part to the upper part of the grate 4 through this gap (see FIG. 4).

  The rod frames 42 of the plurality of movable grate 4 a are drivingly connected to the driving unit 7 installed outside the furnace via the intermediate connecting body 6. The drive unit 7 is generally a hydraulic cylinder. The hydraulic cylinder constituting the drive unit 7 is swingably attached to the shaft 7a.

  In the illustrated example, the intermediate coupling body 6 includes a link mechanism 6a coupled to a piston rod 7b of a hydraulic cylinder constituting the drive unit 7, a coupling plate 6b coupled to the link mechanism 6a, and an upper edge of the coupling plate 6b. A plurality of projecting bearing portions 6c. The connecting plate 6b is arranged parallel to the furnace body side wall 5 at a distance from the outside of the furnace, and includes a roller member 8. The roller member 8 can move on the inclined guide 5a protruding from the furnace body side wall 5. It has become. The rod frame 42 of the movable grate 4a is rotatably connected to the bearing portion 6c.

  When the piston rod 7b of the hydraulic cylinder constituting the driving unit 7 protrudes from the cylinder 7c, the connecting plate 6b is guided to the inclined guide 5a via the link mechanism 6a and slides obliquely upward, and accordingly, a plurality of The movable grate 4a moves obliquely upward simultaneously. On the contrary, if the piston rod 7b retracts into the cylinder 7c, the movable grate 4a moves obliquely downward. Thus, the movable grate 4a reciprocates in an oblique direction.

  The furnace body side wall 5 is provided with the fireproof lining layer 5b, the heat insulating material layer 5c, and the heat insulating material layer 5d in order from the inside. Referring to FIGS. 7 and 8, a water cooling jacket 9 is embedded in the furnace body side wall 5. In the water cooling jacket 9, cooling water is supplied and discharged from a water supply / drainage unit (not shown), and the cooling water is forcibly circulated in the internal space of the water cooling jacket 9. The rod frame 42 penetrates the water cooling jacket 9.

  As shown in FIG. 9, the through hole 5e through which the rod frame 42 of the movable grate 4a passes is formed as a long hole extending in an oblique direction so that the movable grate 4a can reciprocate in the inclined direction. . In addition, the through-hole 5e should just have the opening area which accept | permits the reciprocating movement of the rod frame 42 of the movable grate 4a, and the shape is not restricted to a long hole. A through hole 5f (see FIG. 7) through which the rod frame 42 of the fixed grate 4b passes may be a round hole.

  As shown in FIGS. 7 and 9, a slide seal mechanism 10 is provided so that high temperature gas does not leak from the through hole 5 e through which the rod frame 42 of the movable grate 4 a passes. In the illustrated example, the slide seal mechanism 10 includes a slide plate 10a connected to the rod frame 42, a guide 10b fixed to the furnace body side wall 5 so as to surround the through hole 5e, and slidably receiving the slide plate 10a, And a roller 10c for pressing the slide plate 10a against the guide 10b. The slide plate 10a slides between the solid line position and the virtual line position in FIG. 9 in a state where the through hole 5e is closed by being pressed by the roller 10c. In addition, in order to improve the gas sealing performance, a proper sealing mechanism such as a rotary sealing mechanism can be further added to the rod frame 42.

  As apparent from the above description, according to the water-cooled stoker furnace according to the present invention, unlike the conventional structure in which a cast steel grate is supported by a metal frame, the grate 4 has a casing frame 41 and a rod. The frame 42 is integrated with the frame 42, and the rod frame 42 extending through the side wall of the furnace body is supplied with cooling water from the outside of the furnace and drains the cooling water to the outside of the furnace. The high-temperature, low-oxygen exhaust gas can be introduced.

  Further, according to the water-cooled stoker furnace according to the present invention, since the object to be treated is not dropped and stirred as in the rotary kiln furnace, it can be processed regardless of the properties of the object to be treated. Further, since the object to be treated is not exposed to the burner flame unlike a rotary kiln furnace or a rotary hearth furnace, the oxidation reaction of the object to be treated by OH radicals can be prevented, and a high quality reduction treatment can be performed.

  The present invention is not limited to the above-described embodiment, and can be changed without departing from the spirit of the present invention.

  For example, the grate is arranged in a stepped manner in which each grate is horizontally arranged, and the inflow side rod frame and the outflow side rod frame are connected to the upstream side wall of the grate, and these rod frames are connected to the furnace body upstream side wall ( It is also possible to adopt a configuration in which the front wall is penetrated to supply cooling water to the inflow side rod frame outside the furnace and to drain from the outflow side rod frame. With such a configuration, the rod frame of the movable grate reciprocates along a certain axis, so that the slide seal mechanism can be omitted.

  The water-cooled stoker furnace according to the present invention includes high-temperature reduction treatment, carbonization treatment of organic waste such as sludge and municipal waste, drying furnace dried with high-temperature hot air, sintering furnace, firing furnace, contaminated soil treatment, etc. Also available.

DESCRIPTION OF SYMBOLS 1 Water-cooled stoker furnace 4 Grate 41 Casing frame 42 Rod frame 5 Furnace side wall 6 Intermediate coupling body 9 Water-cooled jacket 10 Slide seal mechanism

Claims (14)

A frame-integrated grate comprising a casing frame having an internal space for water cooling, and a rod frame having an internal flow path extending from the casing frame to the outside of the furnace and communicating with the internal space for water cooling,
A water-cooled stoker furnace, wherein the rod frame is provided with a water outlet and a drain outlet of the internal channel outside the furnace. The grate includes a movable grate, a drive unit for reciprocating the movable grate is installed outside the furnace, and the drive unit is drivingly connected to the rod frame outside the furnace. The water-cooled stoker furnace according to claim 1. The rod frame extends to the side of the rear end of the casing frame and is disposed through a through hole formed in the furnace body side wall.
The through hole is configured to allow the rod frame to reciprocate,
3. The water-cooled type according to claim 2, wherein the furnace body side wall is provided with a slide seal mechanism that is connected to the rod frame and is slidably supported in a state in which the through hole is closed. Stalker furnace. 4. The water-cooled stoker furnace according to claim 2, wherein a plurality of rod frames of the grate are connected to the driving unit via a common intermediate connector disposed outside the furnace. 5. The water-cooled stoker furnace according to any one of claims 2 to 4, wherein a water-cooled jacket is embedded in the side wall of the furnace body, and the through hole is formed in the water-cooled jacket. The grate has an inner wall that divides the water-cooling internal space into two upper and lower chambers that communicate with each other inside the grate tip, and is configured such that cooling water flows from the lower chamber to the upper chamber. The water-cooled stoker furnace according to any one of claims 1 to 5. The water-cooled type according to any one of claims 1 to 6, wherein at least one of an upper surface and a lower surface of the grate is covered with a refractory ceramic plate or an amorphous refractory. Stalker furnace. The water-cooled stoker furnace according to claim 7, wherein the refractory ceramic plate is detachably attached. The grate has a plurality of ridges extending in parallel in the front-rear direction of the grate on at least one of the upper and lower surfaces of the casing frame, and the inner surface of the ridges forms part of the interior space for water cooling. The water-cooled stoker furnace according to claim 7 or 8, wherein the refractory ceramic plate or the irregular refractory is embedded between the parallel protruding ridges. The grate is a movable grate and a fixed grate, and the movable grate and the fixed grate are alternately arranged so that the movable grate slides on the fixed grate, The water-cooled stoker furnace according to claim 9, wherein a contactor protrudes from a lower surface of the front end portion, and the contactor is disposed so as to slide on a protruding line of the fixed grate. . The water-cooled stoker furnace according to any one of claims 1 to 10, further comprising means for supplying high-temperature combustion exhaust gas having an oxygen concentration of 1% or less to the lower part of the grate. The water-cooled stoker furnace according to claim 11, wherein the high-temperature combustion exhaust gas supplied to the lower part of the grate is 500 to 1300 ° C. The water-cooled stoker furnace according to claim 11 or 12, wherein a burner is installed in a lower space surrounded by a fireproof wall below the grate. A combustion furnace for combusting a pyrolysis gas of an object to be processed by the high-temperature combustion exhaust gas is further provided, and the combustion exhaust gas discharged from the combustion furnace is supplied to the lower part of the grate. Item 14. A water-cooled stoker furnace according to any one of Items 11 to 13.

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