JP6512605B2 - Refractory coated grate - Google Patents

Description

  The present invention is mainly used in a stoker type incinerator for incinerating waste such as municipal waste, industrial waste, sludge, etc., a stoker type combustion furnace for burning solid fuel, etc. In particular, the front surface of the grate that is exposed to severe corrosion conditions among the surfaces on the combustion side of the grate, or the front surface of the grate and the fire The present invention relates to a refractory-coated grate in which a refractory is applied on the surface of the top of the grate excluding the portion in sliding contact with other grates, and a part of the surface on the burning side of the grate is covered with the refractory. .

  In general, the stoker type incinerator for incinerating waste such as municipal waste is equipped with a drying stoker, a combustion stoker and a post-combustion stoker in the furnace, and the waste supplied on the drying stoker is dried here After that, the waste is burned on the combustion stoker, and the burnt combustibles are burned off on the post-combustion stoker.

  The dry stoker, the combustion stoker and the post-combustion stoker alternately arrange a fixed grate row and a movable grate row formed by combining grates in parallel in the left-right direction in the front-rear direction (the waste flow direction) The tip of each movable grate row is made to slide on each fixed grate row, and for combustion through the gap between the grates from below the grate arranged in the left and right direction and the front and back direction Air is supplied to the combustion chamber on each stoker.

  Each fixed grate row is attached to a fixed frame below the stoker and is fixedly disposed in the furnace.

  Each movable grate row is attached to a movable frame below the stoker, and reciprocates at a constant pitch in the flow direction of the waste by a driving device such as a hydraulic cylinder to agitate the waste on each stoker While being transported from the upstream side to the downstream side (from the dry stoker side to the post-combustion stoker side). In this way, waste incineration processing is performed continuously.

By the way, in the stoker type incinerator, the temperature of the combustion chamber reaches several hundred degrees, and each stoker comes in contact with the highly corrosive flue gas and ash, so the material of the grate that constitutes each stoker is heat resistant It is required to be excellent in resistance and corrosion resistance.

  Therefore, a general grate (a grate that is not covered with a refractory and does not have a water-cooled structure) that makes up a stoker is a heat resistant steel containing nickel or chromium so as to withstand the heat in the combustion chamber ( For example, it is integrally manufactured by SCH13, SCH11, SCH2 etc. of a JIS standard (for example, refer patent documents 1-4).

  Further, when the grate is used as a grate that constitutes a stoker, it is cooled by the combustion air supplied from the lower side of the grate, and its service life is extended.

  Furthermore, the grate is shaped to have fins and grooves so as to be easily cooled by combustion air supplied from below the grate.

  On the other hand, cooling is performed to solve the drawbacks of the air-cooled general grate (the grate can not be sufficiently cooled when the amount of air for combustion is low or when high-calorie waste is burned). A water-cooled grate using water with high efficiency as a cooling medium has been developed and put to practical use (see, for example, Patent Documents 5 to 7).

  Since the water-cooled grate uses water as a cooling medium, the temperature of the grate is maintained at a low temperature regardless of the amount of air for cooling the grate and the properties of the combustibles (waste and fuel) And can prevent high temperature corrosion.

  However, the air-cooled general grate and the water-cooled grate have the following problems.

  That is, a general air grate grate can be used when the temperature of the grate becomes high, such as when the amount of air cooling the grate decreases or when the waste material burns locally. Has a problem of burning out or causing high temperature corrosion.

  In addition, air-cooled general grates say that even if stable combustion control is performed, burnout and high-temperature corrosion gradually progress, and the grate must be replaced in 2 to 3 years. There was a problem.

  Furthermore, when replacing the grate, it takes 2-3 days or more to replace the grate, requires a lot of manpower, and costs for the production and replacement of a new grate. There was a problem that the cost would be high.

  On the other hand, the water-cooled grate has a problem that the initial cost of installing the water-cooled grate is considerably higher than that of the air-cooled grate, and the cost is increased.

  In addition, a water-cooled grate has a problem that a cooling device for cooling water, cooling water, power of a cooling water circulation pump, a chemical for cooling water, etc. are required.

  In addition to the general air-cooling grate described above and the water-cooling grate, grates have been developed in which the surface of the grate is covered with a refractory (see, for example, Patent Documents 8 and 9).

  That is, the grate is obtained by coating the front and back surfaces of the grate with a refractory ceramic plate or a monolithic refractory.

  However, the grate is exposed to exposed end surfaces that are particularly exposed to severe corrosion conditions, is not covered with a refractory ceramic plate or a monolithic refractory, and is also Since a part is not covered with a refractory ceramic plate or a monolithic refractory, there is a problem that the tip side of the grate is burnt first or causes high temperature corrosion.

  In addition, since the portion where the fixed grate and the movable grate slide on is also covered with the refractory ceramic plate or the monolithic refractory, the dimensional accuracy of the sliding portion of the grate must be increased. There was a problem to say that it must.

JP, 2000-234712, A Japanese Patent Laid-Open No. 2000-240927 Japanese Patent Application Laid-Open No. 2003-065525 Japanese Patent Application Laid-Open No. 2004-37016 JP 2002-364823 A JP, 2010-175154, A JP, 2014-228262, A JP, 2010-175154, A JP 2011-033212 A

  The present invention has been made in view of these problems, and its object is to extend the life of the grate by coating the tip surface exposed to severe corrosion conditions of the grate with a refractory. It is an object of the present invention to provide a refractory-coated grate which can reduce grate replacement time and maintenance costs.

In order to achieve the above object, the refractory-coated grate according to the present invention has a fixed grate row formed by arranging grates in parallel in the left and right direction and a movable grate row alternately stepped in the front and back direction Alternatively, the stoker fires are arranged in an inclined manner, and the tip of each movable grate row is slid on each fixed grate row to burn wastes and fuel on the grate of each grate row. A grate, which is a refractory on the burning side surface of the grate, on the front surface of the grate or on the upper surface of the grate and excluding the portion in sliding contact with the other grate on the grate front surface and the grate top surface And covering the front face of the grate or the top face of the grate except for the part in sliding contact with the other grate on the front face of the grate with a refractory and covering the front face of the grate with fire resistance this provided an enclosure or receiving made of a metal plate to prevent falling off or missing objects It is characterized in.

The refractory-coated grate according to the present invention has a portion in sliding contact with the front surface of the grate, or with the other grate on the front surface of the grate and the top surface of the grate, in order to prevent the dropping or dropping of the refractory. Attach anchors on the top surface of the grate, and place the refractor on the top surface of the grate so that each anchor can be buried, or on the top surface of the grate without its sliding contact with the other grate It is preferable to cover the front surface of the grate or the upper surface of the grate except for the portion in sliding contact with the other grate on the front surface of the grate with the refractory .

The refractory-coated grate according to the present invention is a front surface of each grate arranged in parallel in the left-right direction, or another grate of the front surface of each grate arranged in parallel in the left-right direction and the upper surface of each grate. Refractory materials are integrally applied to the upper surface excluding the parts in sliding contact with each other, and the front of each grate arranged in parallel, or the front of each grate arranged in parallel and the upper surface of each grate It is preferable to cover the upper surface excluding the portion in sliding contact with the grate of the above with an integral refractory .

In the refractory-coated grate according to the present invention, it is preferable that an enclosure or a receptacle provided on the front face of the grate be removably attached to the front face of the grate via a connection fitting .

In the refractory-coated grate according to the present invention, it is preferable to apply a refractory to an enclosure or a receptacle in advance .

  The refractory-coated grate according to the present invention comprises a front surface of the grate which is exposed to severe corrosion conditions among surfaces on the burning side of the grate, or slides with other grate in front of the grate and on the grate top. Refractory is applied to the upper surface excluding the parts in dynamic contact, and the upper surface excluding the sliding surface of the front of the grate or in front of the grate and in sliding contact with other grates on the grate upper surface Because the temperature of the grate does not easily become high even if the amount of combustion air for cooling the grate decreases or the high-calorie waste is burned, the grate is Is less likely to cause burnout and high temperature corrosion. As a result, the refractory-coated grate according to the present invention can extend the life of the grate.

  The refractory-coated grate according to the present invention covers the front surface of the grate or the upper surface excluding the portion in sliding contact with the grate front surface and the other grate top surfaces of the grate top surface by long-term use Although the material gradually wears out, repairing the refractory before the front of the grate, or the front and upper surface of the grate are exposed, hardly causes burnout or high temperature corrosion of the grate.

  When repairing a refractory coated with a grate according to the present invention, the refractory can be repaired if it is about 1 to 2 days, and the cost for repairing the refractory can be repaired. Also, it takes only 1/2 to 1/3 as compared with replacing the grate. As a result, the refractory-coated grate according to the present invention can reduce replacement time and maintenance costs as compared to replacing the grate itself. In addition, since the anchors and the like are attached to the grate and only the refractory is installed, the initial cost increase can be small.

  Since the refractory-coated grate according to the present invention is installed with a metal plate enclosure or support of the grate and the refractory is applied, it is possible to prevent the falling off or dropping of the refractory, and the grate can be made long. It can be used in a stable state for a period.

  In the refractory-coated grate according to the present invention, an anchor is attached to the grate in addition to the enclosure and the receiver, and the refractory is applied to the front of the grate or the front and top of the tip so that the anchor is buried. Because of this, it is possible to further prevent the dropping off or dropping of the refractory, and the grate can be used in a stable state for a longer period of time.

  Since the refractory-coated grate according to the present invention covers the front surface of the grate or the upper surface of the front and tip of the grate with a refractory, it has cooling water and power compared to a water-cooled grate. It becomes unnecessary and can reduce costs.

It is a side view of the principal part of the stoker which used the refractory-coated grate which concerns on embodiment of this invention. It is a partially omitted front view of the stoker shown in FIG. The grate which provided the enclosure which consists of a baseplate and a rib in the front is shown, (a) is a top view of a grate, (b) is a side view of a grate, (c) is a front view of a grate. It is a side view of a grate gap board inserted between the grate which adjoins right and left. FIG. 4 is a partially omitted front view in a state where the grate shown in FIG. 3 is arranged in parallel in the left-right direction and a grate gap plate is inserted between adjacent grates. FIG. 6 is a cross-sectional view taken along the line I-I of FIG. 5; It is a partially-omission front view in the state where a refractory was constructed on the front and the tip upper surface of a plurality of grates arranged in parallel. FIG. 8 is a cross-sectional view of the roller of FIG. 7; It is a side view of the principal part of the stoker which used the refractory-coated grate which concerns on other embodiment of this invention. It is a partially omitted front view of the stoker shown in FIG. The grate which provided the enclosure and anchor which consist of a baseplate and a rib is shown, (a) is a top view of a grate, (b) is a side view of a grate, (c) is a front view of a grate. It is a partially-omission front view in the state which arrange | positioned the grate shown in FIG. 11 in parallel in the left-right direction, and inserted the grate clearance plate between adjacent grates. FIG. 13 is a cross-sectional view taken along the line of FIG. It is a partially-omission front view in the state where a refractory was constructed on the front and the tip upper surface of a plurality of grates arranged in parallel. FIG. 15 is a cross-sectional view taken along the line of FIG. It is a side view of the principal part of the stoker which used the refractory-coated grate which concerns on the further another embodiment of this invention. It is a side view of the principal part of the stoker which used the refractory-coated grate which concerns on the further another embodiment of this invention. It is a side view of the principal part of the stoker which used the refractory-coated grate which concerns on the further another embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
1 and 2 show a stoker (for example, a dry stoker, a combustion stoker or a post-combustion stoker of a stoker type incinerator) using a refractory-coated grate according to an embodiment of the present invention, wherein the stoker is a grate The fixed grate row A and the movable grate row B, which are formed by combining 1 in parallel in the left and right direction, are alternately arranged in the form of steps or slopes in the longitudinal direction (flow direction of waste such as urban waste) The tip of the movable grate row B is slid on each fixed grate row A, and wastes are burned on the grate 1 which is arranged in the left-right direction and the front-rear direction to form the hearth The combustion air is supplied to the combustion chamber on the stoker through the gap between the grates 1 from the lower side of the grate 1 arranged in the left-right direction and the front-rear direction.

  The fixed grate row A constituting the stoker is attached to a stationary frame (not shown) under the stoker by a tightening tool (not shown) such as a bolt and a nut, and is disposed in a fixed state in the combustion chamber of the incinerator. It is done.

  Further, the movable grate row B constituting the stoker is attached to a movable frame (not shown) under the stoker by a tightening tool (not shown) such as a bolt and a nut, and a driving device such as a hydraulic cylinder (not shown) Thus, the waste is reciprocated in the flow direction of the waste at a constant pitch, and the waste on the stoker is transferred from the upstream side to the downstream side (from the left side to the right side in FIG. 1) while being stirred.

  The refractory-coated grate according to the embodiment of the present invention is a portion of the surface on the combustion side of the grate 1 in sliding contact with the front surface of the grate 1 exposed to severe corrosion conditions and the upper surface of the grate 1. The refractory 2 is applied on the upper surface except for the upper surface except the sliding contact portion of the front surface of the grate 1 and the upper surface of the grate 1 is covered with the refractory 2 respectively.

  That is, as shown in FIG. 1, the refractory-coated grate is provided with a grate 1, a bottom plate 3 and ribs 4 attached to the front face of the grate 1 to form an enclosure, a front face of the grate 1 and the grate 1. The refractory 2 covers the upper surface (upper surface on the tip side of the grate 1) excluding the portion in sliding contact with the other grate 1 on the upper surface.

  Specifically, the grate 1 is integrally manufactured of a heat-resistant steel containing nickel or chromium (for example, SCH13, SCH11, SCH2 of JIS standard, etc.) so as to withstand the heat in the combustion chamber of the incinerator. As shown in FIG. 3, a rectangular horizontal plate portion 1a, a vertical plate portion 1b continuously connected downward to the end of the horizontal plate portion 1a, a lower surface of the horizontal plate portion 1a and a vertical plate portion 1b A plurality of fins 1c provided in a row on the back surface, and an attachment portion 1d provided in a row with the fins 1c and attached to a fixed frame and a movable frame under the stoker are provided.

  The bottom plate 3 is formed of a metal plate (for example, a stainless steel plate (SUS 304)) excellent in heat resistance, corrosion resistance, and the like, and forms an enclosure with a rib 4 described later. The bottom plate 3 is attached to the front face of the grate 1 to hold the refractory 2 when the refractory 2 is installed, in order to prevent the dropping off or dropping of the refractory 2.

  In this embodiment, the bottom plate 3 is formed in a rectangular shape having the same length as the width of the grate 1 as shown in FIG. ing.

  The rib 4 is formed of a metal plate (for example, a stainless steel plate (SUS 304)) excellent in heat resistance, corrosion resistance and the like, and forms an enclosure with the bottom plate 3. The ribs 4 are attached to the front surface of the grate 1 to hold the refractory 2 when the refractory 2 is installed, in order to prevent the dropping and dropping of the refractory 2.

  In this embodiment, as shown in FIG. 3, the ribs 4 are formed in a substantially triangular shape which is lower than the height of the grate 1 and shorter than the width of the bottom plate 3. It is equally spaced at the center position, and is attached by welding to the front surface of the grate 1 and the upper surface of the bottom plate 3 in a vertical posture. Further, ribs 4 at both end positions of the front surface of the grate 1 are attached to the front surface of the grate 1 so as to be flush with the side surfaces of the grate 1.

  In this embodiment, although three ribs 4 are used for one grate 1, the number of the ribs 4 is appropriately selected according to the size of the grate 1. is there. Also, the shape of the rib 4 can be changed as appropriate in design.

  The bottom plate 3 and the ribs 4 attached to the front surface of the grate 1 surround the lower region of the front surface of the grate 1 with the front side and the upper side open, and the refractory 2 It is supposed to be constructed.

  The refractory 2 is made of castable refractories, plastic refractories, or monolithic refractories such as refractory mortars, and the other refractors 1 on the front face of the grate 1 and the top of the grate 1 by pouring, pouring, spraying etc. It is applied on the upper surface (the upper surface of the tip of grate 1) excluding the part in sliding contact, and covers the upper surface of grate 1 except for the part in sliding contact with the other grate ing. The material of this monolithic refractory may be any material as long as it has heat resistance, corrosion resistance, adhesion and the like, for example, silicon carbide refractory, magnesia-chromium refractory, alumina Refractories, silica refractories, etc. are used.

  Next, the refractory 2 is applied to the upper surface (upper surface of the tip of the grate 1) excluding the portion in sliding contact with the other grate 1 of the front surface of the grate 1 and the upper surface of the grate 1 The case of forming a grate will be described.

  In this case, the refractory 2 may be applied to the newly produced grate 1 to form a refractory-coated grate, or the refractory 2 may be applied to the grate 1 of the existing stoker to form a refractory A coated grate may be formed.

  When a refractory 2 is applied to the newly produced grate 1 to form a refractory-coated grate, first, the bottom plate 3 and the rib 4 are welded to the front face of the grate 1 as shown in FIG. The grate 1 attached with the bottom plate 3 and the rib 4 is arranged in parallel in the lateral direction on the fixed frame below the stoker or on the movable frame, and each grate 1 is a bolt, nut or the like. Attach to a fixed frame or a movable frame with a fastener (not shown). The bottom plate 3 and the ribs 4 may be attached before arranging the grate 1 in parallel, or may be attached after arranging the grate 1 in parallel.

  The adjacent fires 1 are arranged so that there is a space (expansion allowance) between adjacent fires 1 and between ribs 4 at both ends of the front surface of the fire 1 respectively. A grate gap plate 6 as shown in FIG. 4 is inserted between the grids 1 (see FIG. 5). The grate gap plate 6 is fitted in place. Further, a gap (expansion cost) is also formed between the side wall 7 of the incinerator and the grate 1.

  The grate gap plate 6 is formed of a combustible member (for example, a veneer board, a plastic board, etc.), and when it burns waste on a stoker, it burns together with waste and disappears. ing. As a result, a gap (expansion allowance) is formed between the grate 1 adjacent to the left and right. Further, the grate gap plate 6 is provided with a knob portion 6a which protrudes upward from the upper surface of the grate 1 so that position adjustment can be easily performed after the grate gap plate 6 is inserted between the adjacent grates 1.

  Then, the portion covered with the refractory 2 of the grate 1 arranged in parallel in the left-right direction (the upper surface excluding the portion in front of the grate 1 and the other grate 1 in sliding contact with the upper surface of the grate 1) A formwork (not shown) is assembled, and a refractory 2 such as a castable refractory is applied by pouring, pouring, spraying or the like.

  At this time, the refractory 2 is integrally installed on a plurality of grates 1 arranged in parallel in the left-right direction. Thereby, the refractory materials 2 on the adjacent grate 1 are integrated (see FIG. 7).

  Finally, when it is confirmed that the refractory 2 has completely hardened, the formwork is removed. In this way, a refractory-coated grate is formed.

  In the above embodiment, the refractory 2 is applied to the newly produced grate 1 to form a refractory-coated grate, but in the other embodiments, the fire of the existing stoker is installed. The refractory 2 may be applied to the grid 1 to form a refractory-coated grate.

  Moreover, in said embodiment, although the refractory 2 was integrally built to several grate 1 arrange | positioned in parallel in the left-right direction, in other embodiment, a refractory is used for every one grate. 2 may be applied to form a refractory-coated grate.

  Thus, since the refractory-coated grate covers the upper surface of the grate 1 except for the portion in sliding contact with the other grate in the front surface of the grate 1 and the upper surface of the grate 1, the refractory 2 covers the fire Even if the amount of combustion air for cooling the grid 1 decreases or the high-calorie waste is burned, the temperature of the grate 1 does not easily become high, and the burnout of the grate 1 or high-temperature corrosion It becomes difficult to cause As a result, the refractory-coated grate can be extended in life.

  In addition, although the refractory-coated grate gradually wears out the refractory 2 due to long-term use, if the refractory 2 is repaired before the front surface and the upper surface of the grate 1 are exposed, burnout of the grate 1 or It hardly causes high temperature corrosion.

  Furthermore, when repairing the refractory 2 coated with the grate 1, the refractory-coated grate can repair the refractory 2 if it is about 1 to 2 days, and also for repairing the refractory 2 The cost is also 1/2 to 1/3 compared to the case of replacing the grate 1. For example, in the case of the grate 1 without the refractory 2, as an example, replacement of the grate 1 takes about 5 million yen a year, but in the case of the refractory-coated grate, the annual replacement of the refractory 2 takes about It costs only 2 million yen.

  Furthermore, since the refractory-coated grate has the enclosure comprising the bottom plate 3 and the ribs 4 attached to the front face of the grate 1 and the refractory 2 is applied, it is possible to prevent the refractory 2 from falling off or falling off. The grate 1 can be used in a stable state for a long time.

  Furthermore, since the refractory-coated grate coats the front surface and top surface of the tip of the grate 1 with the refractory 2, the need for cooling water and power is eliminated as compared with the water-cooled grate 1, thereby reducing cost. Can be

  9 and 10 show a stoker (for example, a dry stoker of a stoker incinerator, a combustion stoker or a post-combustion stoker) using a refractory-coated grate according to another embodiment of the present invention, Fixed grate row A and movable grate row B, which are formed by combining grate 1 in parallel in the left and right direction, are alternately arranged in steps or in an inclined manner in the longitudinal direction (flow direction of waste such as urban waste) The tip of each movable grate row B is slid on each fixed grate row A, and wastes are burned on the grate 1 which is arranged in the left-right direction and the front-rear direction to form a hearth. It is

  A refractory-coated grate according to another embodiment of the present invention comprises a grate 1 and a bottom plate 3 and a rib 4 attached to the front of the grate 1 to form an enclosure, as shown in FIG. And a plurality of anchors 5 attached to the front and upper surfaces of the grate 1, and a refractory 2 covering the upper surface (upper surface on the tip side of the grate 1) excluding sliding contact portions of the front surface of the grate 1 and the upper surface of the grate 1 Is equipped.

  The grate 1, the bottom plate 3, the ribs 4 and the refractory 2 are constructed in the same manner as those of the refractory-coated grate shown in FIGS. 1 and 2, and therefore the detailed description thereof is omitted here. . The same reference numerals are assigned to the same parts and members as the refractory-coated grate shown in FIGS. 1 and 2.

  A plurality of the anchors 5 are provided on the upper surface (upper surface on the tip side of the grate 1) excluding the sliding contact portion of the front surface of the grate 1 and the upper surface of the grate 1 in order to prevent dropping and dropping of the refractory 2 This is attached.

  In this embodiment, a metal (for example, stainless steel) Y-type anchor is used as the anchor 5, and eight Y-type anchors are used for one grate 1, Six pieces are attached to the front of the grate 1 and two pieces are attached to the top surface of the tip of the grate 1.

  The anchors 5 attached to the front surface of the grate 1 are formed to have smaller eyes than the anchors 5 attached to the upper surface of the grate 1 and have a posture projecting forward to a height position substantially in the middle of the front surface of the grate 1 And are attached to the front surface of the grate 1 by welding so as to be spaced apart to such an extent that they do not interfere with each other.

  Further, the anchor 5 attached to the upper surface of the grate 1 is formed approximately twice as large as the grate 1 attached to the front surface of the grate 1 and protrudes forward from the front surface of the grate 1 It is disposed in attitude and parallel to the upper surface of the grate 1 and is attached to the upper surface of the grate 1 by welding.

  In the above embodiment, a Y-type anchor is used as the anchor 5, but in another embodiment, a V-type anchor, a spiral anchor, various stud anchors, etc. may be used in addition to the Y-type anchor. Alternatively, several types of the respective anchors may be used in combination.

  Next, the case of forming the refractory-coated grate shown in FIGS. 9 and 10 will be described.

  In this case, the refractory 2 may be applied to the newly produced grate 1 to form a refractory-coated grate, or the refractory 2 may be applied to the grate 1 of the existing stoker to form a refractory A coated grate may be formed.

  When a refractory 2 is applied to a newly produced grate 1 to form a refractory-coated grate, first, an enclosure and an anchor comprising a bottom plate 3 and ribs 4 as shown in FIG. 5 is attached by welding, and the grate 1 is arranged in parallel in the left and right direction on the fixed frame below the stoker or on the movable frame, and each grate 1 is fixed by a tightening tool (not shown) such as a bolt or nut. Or attach to the movable frame. The bottom plate 3, the rib 4 and the anchor 5 may be attached before arranging the grate 1 in parallel, or may be attached after arranging the grate 1 in parallel.

  The adjacent fires 1 are arranged so that there is a space (expansion allowance) between adjacent fires 1 and between ribs 4 at both ends of the front surface of the fire 1 respectively. A grate gap plate 6 as shown in FIG. 4 is inserted between the grids 1 (see FIG. 12).

  Then, the portion covered with the refractory 2 of the grate 1 arranged in parallel in the left-right direction (the upper surface excluding the portion in front of the grate 1 and the other grate 1 in sliding contact with the upper surface of the grate 1) A formwork (not shown) is assembled, and a refractory 2 such as a castable refractory is applied by pouring, pouring, spraying or the like.

  At this time, the refractory 2 is integrally installed on a plurality of grates 1 arranged in parallel in the left-right direction. Thereby, the refractory materials 2 on the adjacent grate 1 are integrated (see FIG. 14).

  Finally, when it is confirmed that the refractory 2 has completely hardened, the formwork is removed. In this way, a refractory-coated grate is formed.

  In the above embodiment, the refractory 2 is applied to the newly produced grate 1 to form a refractory-coated grate, but in the other embodiments, the fire of the existing stoker is installed. The refractory 2 may be applied to the grid 1 to form a refractory-coated grate.

  The refractory-coated grate shown in FIGS. 9 and 10 is coated with the refractory 2 on the front surface of the grate 1 and the upper surface of the grate 1 except for the portion in sliding contact with the other grate 1. Therefore, the same effects as the refractory-coated grate shown in FIGS. 1 and 2 can be achieved. In particular, the refractory-coated grate shown in FIGS. 9 and 10 has an anchor 5 attached to the grate 1 in addition to an enclosure consisting of a bottom plate 3 and a rib 4 and a front surface of the grate 1 so that the anchor 5 is buried. Since the refractory 2 is installed on the upper surface of the tip portion, dropping off or dropping of the refractory 2 can be further prevented, and the grate can be used in a stable state for more than 1 hour.

  FIG. 16 shows a stoker using a refractory-coated grate according to still another embodiment of the present invention.

  That is, the refractory-coated grate includes the grate 1, the bottom plate 3 and the ribs 4 attached to the front face of the grate 1 to form an enclosure, the other grate of the front face of the grate 1 and the top face of the grate 1 1 and a refractory 2 covering the upper surface (upper surface on the tip side of the grate 1) excluding the portion in sliding contact with the base 1, and the proximal end on the upper surface of the horizontal plate 1a of the grate 1 It is formed lower than the side upper surface so that the upper surface of the refractory 2 is flush with the upper surface on the base end side of the horizontal plate portion 1 a of the grate 1.

  The refractory-coated grate is constructed in the same manner as the refractory-coated grate shown in FIGS. 1 and 2 except that the shape of the horizontal plate portion 1a of the grate 1 is changed. The same reference numerals are attached to the same parts and members as the refractory grate shown in 2 and the detailed description thereof is omitted.

The refractory-coated grate shown in FIG. 16 can exhibit the same function and effect as the refractory-coated grate shown in FIGS. 1 and 2. Moreover, since the upper surface of the refractory 2 is flush with the upper surface on the base end side of the horizontal plate portion 1 a of the grate 1, the refractory-coated grate feeds waste on the refractory coated grate. Smoothly and smoothly.
Of course, the anchor 5 shown in FIGS. 9 and 10 may be attached to the refractory-coated grate.

  FIG. 17 shows a stoker using a refractory-coated grate according to still another embodiment of the present invention, and the refractory-coated grate used for the stoker is one of the surfaces on the combustion side of the grate 1. The refractory 2 is applied only to the front face of the grate 1, and only the front face of the grate 1 is covered with the refractory 2, and the refractory 2 and the bottom plate 3 and the ribs 4 forming the enclosure are removable. It is.

  That is, the refractory-coated grate includes the grate 1, the bottom plate 3 and the ribs 4 attached to the front face of the grate 1 to form an enclosure, and the bottom plate 3 and the ribs 4 detachably on the front face of the grate 1 Refractory 2 is installed in advance in a factory etc. on bottom plate 3 and ribs 4 forming enclosures, provided with a plurality of connecting fittings 8 to be attached, and refractory 2 covering the front face of grate 1. The bottom plate 3 and the rib 4 on which the refractory 2 is installed on the front surface of the grate 1 are attached by the connection fitting 8.

  The bottom plate 3 is formed of a metal plate such as a stainless steel plate having excellent heat resistance and corrosion resistance and has an L-shaped cross-sectional shape, and is connected to a vertical portion of the bottom plate 3 (a portion in contact with the front of the grate 1) Through holes through which the metal fitting 8 is inserted are formed at regular intervals along the width direction of the grate 1.

  Further, the ribs 4 are formed in the same shape as the ribs 4 shown in FIG. 3 by a metal plate such as a stainless steel plate excellent in heat resistance, corrosion resistance, etc. And is attached by welding to the vertical part and the horizontal part of the bottom plate 3 in a vertical posture.

  Further, the connection fitting 8 includes a bolt 8a inserted into the through hole formed in the bottom plate 3 and the through hole formed in the vertical plate portion 1b of the grate 1, and two nuts detachably screwed to the bolt 8a. The bottom plate 3 and the rib on which the refractory 2 is constructed by inserting the bolt 8a attached to the bottom plate 3 into the through hole formed in the vertical plate portion 1b of the grate 1 and fastening the nut 8b to the bolt 8a. The bottom plate 3 on which the refractory 2 is applied and the rib 4 can be attached to the grate 1 by attaching the 4 to the front of the grate 1 and also by loosening the nut 8 b and pulling out the bolt 8 a from the through hole of the grate 1. Can be removed from the front of the

  In the above embodiment, the connection fitting 8 including the bolt 8a and the nut 8b is used as the connection fitting 8, but in another embodiment, although not shown, the connection fitting 8 is provided with a pin, a lever, a cam, etc. You may use the conventionally known quick pin provided.

The refractory-coated grate shown in FIG. 17 can exhibit the same function and effect as the refractory-coated grate shown in FIGS. 1 and 2. Moreover, since the refractory-coated grate is detachably attached to the front face of the grate 1 with the bottom plate 3 and the ribs 4 forming the enclosure by the connection fitting 8, replacement of the damaged and burned refractory 2 is simplified and easy. Easy to do. In particular, when the quick pin is used for the connection fitting 8, the attachment of the bottom plate 3 on which the refractory 2 is installed and the ribs 4 to the grate 1 and the removal from the grate 1 can be performed more easily and easily.
Of course, the anchor 5 shown in FIGS. 9 and 10 may be attached to the refractory-coated grate.

  FIG. 18 shows a stoker using a refractory-coated grate according to still another embodiment of the present invention, wherein the refractory-coated grate used for the stoker is one of the surfaces on the combustion side of the grate 1. Refractory 2 is applied to the top of the grate 1 except for the portion in sliding contact with the other grate 1 on the top of the grate 1, and the other fire of the front of the grate 1 and the top of the grate 1 The upper surface excluding the portion in sliding contact with the grid 1 is covered with the refractory 2 respectively, and the refractory 2 and the bottom plate 3 and the rib 4 forming the enclosure are removable.

  Further, the refractory-coated grate is formed such that the top end side surface of the horizontal plate portion 1a of the grate 1 is lower than the upper surface of the base end portion side, and the upper surface of the refractory 2 It is made to be flush with the base end side upper surface.

  That is, the refractory-coated grate includes the grate 1, the bottom plate 3 and the ribs 4 attached to the front and tip side upper surfaces of the grate 1 to form an enclosure, the bottom plate 3 and the ribs 4 of the grate 1; The bottom plate 3 and the ribs 4 forming the enclosure are provided with a plurality of connection fittings 8 detachably mounted on the front surface and the top surface of the tip side and a refractory 2 covering the top surface and the front surface of the grate 1. The refractory 2 is installed in advance in a factory or the like, and the bottom plate 3 and the rib 4 on which the refractory 2 is installed on the front surface and the tip side upper surface of the grate 1 are attached by the connection fitting 8 at the site.

  The bottom plate 3 is formed of a metal plate such as a stainless steel plate excellent in heat resistance, corrosion resistance, etc., and includes a vertical portion contacting the front surface of the grate 1 and a horizontal portion continuously provided at the lower end of the vertical portion. And an upper horizontal portion connected to the upper end of the vertical portion and in contact with the top surface of the grate 1 on the tip side. Through holes through which the connection fitting 8 is inserted are formed at regular intervals along the width direction of the grate 1 in the vertical portion and the upper horizontal portion of the bottom plate 3.

  Further, the ribs 4 are formed in the same shape as the ribs 4 shown in FIG. 3 by a metal plate such as a stainless steel plate excellent in heat resistance, corrosion resistance, etc. And is attached by welding to the vertical part and the horizontal part of the bottom plate 3 in a vertical posture.

  Furthermore, the connection fitting 8 is composed of a bolt 8a and a nut 8b, and the bolt 8a attached to the vertical portion of the bottom plate 3 is inserted into the through hole formed in the vertical plate portion 1b of the grate 1 and the upper portion of the bottom plate 3 The bottom plate 3 and the rib on which the refractory 2 is constructed by inserting the bolts 8a respectively into the through holes formed in the horizontal portion and the through holes formed in the horizontal plate portion 1a of the grate 1 and tightening the nuts 8b on the bolts 8a. A bottom plate 3 on which the refractory 2 is constructed by attaching the refractory 4 to the front surface of the grate 1 and the upper surface of the grate 1 and pulling the bolts 8a from the through holes of the grate 1 by loosening the nuts 8b. The rib 4 can be removed from the front surface of the grate 1 and the top surface on the tip side.

  When the bottom plate 3 on which the refractory 2 is installed and the rib 4 are attached to the grate 1 by the connection fitting 8, a part of the top surface of the horizontal plate portion 1a of the grate 1 on the tip side (the connection fitting 8 is inserted Since the part is open, the refractory 2 is applied to a part of the upper surface of the horizontal plate portion 1a of the grate 1 at the site, and the connection fitting 8 and the horizontal plate project upward from the horizontal plate portion 1a The upper surface of the part 1a is covered with the refractory 2. At this time, the upper surfaces of the refractory 2 installed on the bottom plate 3 in advance in a factory or the like and the upper surface of the refractory 2 installed on the site are flush with each other.

The refractory-coated grate shown in FIG. 18 can exhibit the same function and effect as the refractory-coated grate shown in FIGS. 16 and 17.
Of course, the anchor 5 shown in FIGS. 9 and 10 may be attached to the refractory-coated grate.

  The shape and configuration of the refractory-coated grate are not limited to those according to the above embodiments, and the front face of the grate 1, or the other of the front face of the grate 1 and the upper face of the grate 1 Any shape and configuration may be employed as long as the top surface is covered with the refractory 2 except for the portion in sliding contact with the grate.

  In addition, the refractory-coated grate is formed by coating the front surface of the grate 1 or the front surface of the grate 1 and the top surface of the tip of the grate 1 with a refractory 2 consisting of a monolithic refractory The front surface of the grate 1 or the front surface of the grate 1 and the top surface of the tip of the grate 1 may be coated with a fixed refractory such as a firebrick.

  Furthermore, in each of the above embodiments, an enclosure consisting of the bottom plate 3 and the ribs 4 is provided on the front face of the grate 1, but in another embodiment a receptacle consisting of the bottom plate 3 is attached to the front face of the grate 1, It is also possible to prevent the dropout or dropout of the refractory 2. Moreover, you may use combining the receiving which consists of the baseplate 3, and the anchor 5. FIG.

  1 is a grate, 1a is a horizontal plate portion, 1b is a vertical plate portion, 1c is a fin, 1d is a mounting portion, 2 is a refractory, 3 is a bottom plate, 4 is a rib, 5 is an anchor, 6 is a grate gap plate, 6a is a knob, 7 is a side wall of the incinerator, 8 is a connection fitting, 8a is a bolt, 8b is a nut, A is a fixed grate row, and B is a movable grate row.

Claims (5)

An array of fixed grate and movable grate arranged in parallel in the lateral direction are arranged in steps or in an inclined manner alternately in the front and rear direction, and the tip of each movable grate is fixed It is a grate of a stoker which is made to slide waste and fuel on the grate of each grate row respectively by sliding on the grate row, wherein a surface of the grate on the combustion side of the grate is provided. Refractory materials are applied to the front surface or the top surface of the grate excluding the front surface of the grate and the portion of the grate that is in sliding contact with the other grate, and the front surface of the grate or the front surface of the grate and the grate top The top surface of the grate is covered with a refractory, except for parts in sliding contact with the other grates, and a metal plate enclosure or receptacle is provided on the front of the grate to prevent removal and removal of the refractory. A refractory-coated grate characterized by Anchors are attached to the front of the grate, or the top of the grate and the top of the grate except for parts in sliding contact with the other grate, in order to prevent dropping and dropping of the refractory, The refractory is applied to the front of the grate, or the upper surface of the grate, excluding the portion in sliding contact with the other grate on the front of the grate, and the front of the grate, or The refractory-coated grate according to claim 1 , wherein the upper surface of the grate excluding the portion in sliding contact with the other grate in front of the grate and the upper surface of the grate is covered with a refractory. On the front of each grate arranged in parallel in the left-right direction, or on the upper surface excluding the front of each grate arranged in parallel in the left-right direction and the portion in sliding contact with other grates on the top of each grate Refractory materials are integrally applied, and the front face of each grate arranged in parallel, or the front face of each grate arranged in parallel and the portion in sliding contact with the other grate on the top of each grate are excluded. The refractory-coated grate according to claim 1 or 2 , wherein the upper surface is covered with an integral refractory . The refractory-coated grate according to claim 1 , wherein an enclosure or a receptacle provided on the front face of the grate is detachably attached to the front face of the grate through a connection fitting . The refractory-coated grate according to claim 4 , wherein a refractory is applied to the enclosure or the receptacle in advance .

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