JP2017078534A - Refractory coating fire grate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong the lifetime of a fire grate and also to shorten a replacement time of and lower maintenance management costs for the fire grate by coating a tip surface, exposed to severe corrosive conditions, of the fire grate with a refractory.SOLUTION: The present invention relates to a fire grate 1 of a stoker having fixed fire grate arrays A and movable fire grate arrays B, formed by arranging fire grates 1 in parallel in a right-left direction, arrayed in a staircase or inclined state in parallel in a front-rear direction, and used to burn wastes and fuel on fire grates 1 of the respective fire grate arrays by sliding tip parts of the respective movable fire grate arrays B on the respective fixed fire grate arrays A. Refractories 2 are constructed respectively on front faces of the fire grates 1 or the front faces and upper faces, except parts coming into slide contact with other fire grates 1, of the fire grates 1 of burning-side surfaces of the fire grates 1 so as to coat the front faces of the fire grates 1 or the front faces and upper faces, except the parts coming into slide contact with other fire grates 1, of the fire grates 1 with the refractories 2 respectively.SELECTED DRAWING: Figure 1

Description

  The present invention is mainly used in a stoker-type incinerator that incinerates waste such as municipal waste, industrial waste, sludge, and a stoker-type incinerator that burns solid fuel. In particular, it is related to the stoker grate which is arranged in parallel to form the hearth, and in particular, on the combustion side surface of the grate, the front of the grate exposed to severe corrosion conditions, or the front of the grate and the grate It relates to a refractory-coated grate in which a refractory is applied to each surface excluding a portion that is in sliding contact with the other grate on the upper surface of the lattice, and a part of the combustion side surface of the grate is covered with a refractory. .

  In general, a stoker-type incinerator for incinerating waste such as municipal waste is provided with a dry stoker, a combustion stoker and a post-combustion stoker in the furnace, and the waste supplied on the dry stoker is dried here. After that, the waste is burned on the combustion stalker, and the remaining burnable combustibles are burned out on the post-burning stalker.

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

  Each of the fixed grate rows is attached to a fixed frame under the stoker and is arranged in a fixed state in the furnace.

  Each movable grate train is attached to a movable frame under the stoker, and is reciprocated at a constant pitch in the waste flow direction by a drive device such as a hydraulic cylinder to stir the waste on each stoker. However, it is transferred from the upstream side to the downstream side (from the dry stalker side to the post-combustion stalker side). Thereby, the incineration processing of waste is performed continuously.

By the way, in a stoker-type incinerator, the temperature of the combustion chamber reaches several hundred degrees, and each stoker comes into contact with highly corrosive combustion exhaust gas and ash. It is required to have excellent properties and corrosion resistance.

  Therefore, the general grate that constitutes the stoker (grate that is not covered with a refractory and does not have a water-cooled structure) is a heat-resistant steel containing nickel or chromium so that it can withstand the heat in the combustion chamber ( For example, JIS standard SCH13, SCH11, SCH2, etc.) are integrally manufactured (for example, see Patent Documents 1 to 4).

  Moreover, if the said grate is used as a grate which comprises a stoker, it will be cooled by the combustion air supplied from the downward direction of a grate, and a lifetime will become long.

  Further, the grate has a shape with fins and grooves so that it can be easily cooled by combustion air supplied from below the grate.

  On the other hand, in order to solve the disadvantages of the general air-cooled grate (the grate cannot be cooled sufficiently when the amount of combustion air is low or when high-calorie waste is burned) A water-cooled grate using highly efficient water as a cooling medium has been developed and put into practical use (see, for example, Patent Documents 5 to 7).

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

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

  In other words, a general air-cooled grate is a grate that is used when the temperature of the grate becomes high, such as when the amount of air that cools the grate decreases or when the waste burns locally. There was a problem of burning out or causing hot corrosion.

  In addition, a general air-cooled grate says that even when stable combustion management is performed, burning and high-temperature corrosion gradually progress, and the grate must be replaced in 2 to 3 years There was a problem.

  Furthermore, when exchanging the grate, it takes two to three days or more to replace the grate, and it takes a lot of manpower. There was a problem of high costs.

  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 a general air-cooled grate and is expensive.

  Further, the 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, and the like are required.

  In addition to the above-described general air-cooled grate and water-cooled grate, a grate whose surface is covered with a refractory has been developed (see, for example, Patent Documents 8 and 9).

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

  However, the grate has a bare end face exposed to particularly severe corrosive conditions, is not covered with a refractory ceramic plate or an irregular refractory, and is not covered with a grate tip surface. Since a part of the grate is not covered with a refractory ceramic plate or an irregular refractory material, there is a problem that the front end portion of the grate burns out first or causes high-temperature corrosion.

  In addition, the sliding part of the grate on the fixed side and the grate on the movable side are also covered with a refractory ceramic plate or an irregular refractory, so the dimensional accuracy of the sliding part of the grate must be increased. There was a problem that it had to be.

JP 2000-234712 A JP 2000-240927 A JP 2003-066553 A JP 2004-037016 A 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 such problems, and its purpose is to extend the life of the grate by covering the tip surface exposed to the severe corrosion conditions of the grate with a refractory. It is another object of the present invention to provide a refractory-covered grate capable of reducing the grate replacement time and maintenance cost.

  In order to achieve the above object, the refractory-covered grate according to the present invention has a fixed grate row and a movable grate row in which the grate is arranged in parallel in the left-right direction, and is alternately stepped in the front-rear direction. Alternatively, the stoker fire is arranged in a slanted manner, and the tip of each movable grate train is slid on each fixed grate train to burn waste and fuel on each grate train grate. A refractory on each of the upper surfaces excluding a portion of the surface on the combustion side of the grate, or a portion in sliding contact with the front surface of the grate and the other grate on the upper surface of the grate, of the surface on the combustion side of the grate , And the upper surface of the grate or the upper surface excluding the portion in sliding contact with the front surface of the grate and the other grate on the upper surface of the grate is covered with a refractory.

  The refractory-covered grate according to the present invention is provided with a metal plate enclosure or receptacle on the front side of the grate in order to prevent the refractory from dropping or missing, and the front side of the grate or the front side of the grate. Install a refractory on the upper surface of the grate, excluding the part that is in sliding contact with the other grate, and make sliding contact with the front of the grate or the front of the grate and other grate on the grate. It is preferable to cover the upper surface excluding the portion to be covered with a refractory.

  The refractory-covered grate according to the present invention has a sliding contact with the front surface of the grate or the other grate on the front surface of the grate and the upper surface of the grate in order to prevent the refractory from dropping or missing. Each refractory is attached to the top of the grate, or the top of the grate so that each anchor is buried, or the top of the grate, excluding the part that is in sliding contact with the front of the grate and the other grate on the grate. It is preferable to cover the upper surface of the grate or the upper surface excluding the portion in sliding contact with the front surface of the grate and the other grate on the upper surface of the grate.

  The refractory-coated grate according to the present invention is the front of each grate arranged in parallel in the left-right direction, or the front of each grate arranged in parallel in the left-right direction and another grate on the top of each grate The refractory is integrally constructed on the upper surface excluding the part that comes into sliding contact with the front of each grate arranged in parallel, or the front of each grate arranged in parallel and the top of each grate It is preferable to cover the upper surface excluding the portion that is in sliding contact with the grate with an integral refractory.

  In the refractory-covered grate according to the present invention, it is preferable that an enclosure or a receiver provided on the front surface of the grate is detachably attached to the front surface of the grate via a connection fitting.

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

  The refractory-covered grate according to the present invention is slid with the front side of the grate exposed to severe corrosion conditions on the combustion side surface of the grate, or with the other grate on the front side of the grate and the grate upper surface. Install refractories on the upper surface excluding the parts that make dynamic contact, and refractories on the front side of the grate, or on the upper side excluding the parts that make sliding contact with the front of the grate and the other grate on the grate. Since the amount of air in the combustion air used to cool the grate is reduced, or even when burning high-calorie waste, the grate temperature is unlikely to become high. It is difficult to cause burnout and hot corrosion. As a result, the refractory-coated grate according to the present invention can extend the life of the grate.

  The refractory-covered grate according to the present invention is a refractory coating that covers a front surface of the grate or a top surface excluding a portion that is in sliding contact with the front surface of the grate and the other grate on the grate upper surface after long-term use. Objects are gradually worn out, but if the refractory is repaired before the front of the grate or the front and top surfaces of the grate are exposed, the grate is hardly burned or hot-corroded.

  The refractory-covered grate according to the present invention can repair the refractory if repairing the refractory covered with the grate, if it is about 1 to 2 days, and the cost for repairing the refractory However, 1/2 to 1/3 is sufficient as compared with the case of replacing the grate. As a result, the refractory-covered grate according to the present invention can reduce the replacement time and the maintenance cost compared to the case where the grate itself is replaced. In addition, since an anchor or the like is attached to the grate and the refractory is simply constructed, the initial cost increase is small.

  The refractory-covered grate according to the present invention is constructed by attaching a grate metal plate enclosure or receptacle to the refractory, so that the refractory can be prevented from falling off or missing. It can be used in a stable state for a period.

  The refractory-covered grate according to the present invention attaches an anchor to the grate in addition to the enclosure and receptacle, and installs the refractory on the front of the grate, or on the front and top of the grate so that the anchor is buried. Therefore, it is possible to further prevent the refractory from dropping or missing, and to use the grate in a stable state for a longer period of time.

  The refractory-covered grate according to the present invention covers the front surface of the grate or the front surface of the grate and the top surface of the tip portion with a refractory material. This is unnecessary, and the cost can be reduced.

It is a side view of the principal part of the stalker using the refractory covering grate which concerns on embodiment of this invention. FIG. 2 is a partially omitted front view of the stalker shown in FIG. 1. 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, and (c) is a front view of a grate. It is a side view of the grate gap board inserted between the grate which adjoins right and left. FIG. 4 is a partially omitted front view of a state in which the grate shown in FIG. 3 is arranged in parallel in the left-right direction and a grate gap plate is inserted between adjacent grate. FIG. 6 is a cross-sectional view taken along the line II in FIG. 5. It is a partially-omission front view of the state which applied the refractory to the front surface and front-end | tip part upper surface of the several grate arrange | positioned in parallel. FIG. 8 is a cross-sectional view taken along the line of FIG. It is a side view of the principal part of the stalker using the refractory covering grate which concerns on other embodiment of this invention. FIG. 10 is a partially omitted front view of the stalker shown in FIG. 9. 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. FIG. 12 is a partially omitted front view of a state in which the grate shown in FIG. 11 is arranged in parallel in the left-right direction and a grate gap plate is inserted between adjacent grate. FIG. 13 is a sectional view taken along the line ha-ha in FIG. 12. It is a partially-omission front view of the state which applied the refractory to the front surface and front-end | tip part upper surface of the several grate arrange | positioned in parallel. FIG. 15 is a sectional view taken along the knee line of FIG. 14. It is a side view of the principal part of the stalker using the refractory covering grate which concerns on other embodiment of this invention. It is a side view of the principal part of the stalker using the refractory covering grate which concerns on other embodiment of this invention. It is a side view of the principal part of the stalker using the refractory covering grate which concerns on other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 and 2 show a stalker using a refractory-covered grate according to an embodiment of the present invention (for example, a dry stalker, a combustion stalker or a post-combustion stalker of a stalker-type incinerator). A fixed grate row A and a movable grate row B, which are formed by combining 1 in parallel in the left-right direction, are alternately arranged in a stepwise or inclined manner in the front-rear direction (the flow direction of waste such as municipal waste). The tip part of the movable grate row B is slid on each fixed grate row A, and the waste is burned on the grate 1 that 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 grate 1 from below the grate 1 arranged in the left-right direction and the front-rear direction.

  The fixed grate array A constituting the stalker is attached to a fixed frame (not shown) under the stalker by means of fasteners (not shown) such as bolts and nuts, and is fixedly placed in the combustion chamber of the incinerator. Has been.

  Further, the movable grate row B constituting the stalker is attached to a movable frame (not shown) under the stalker by tightening tools (not shown) such as bolts and nuts, and a driving device (not shown) such as a hydraulic cylinder. Therefore, 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 stirring the waste on the stoker.

  And the refractory covering grate which concerns on embodiment of this invention is the part which the sliding contact of the front surface of the grate 1 exposed to severe corrosion conditions and the grate 1 upper surface among the surfaces of the combustion side of the grate 1 The refractories 2 are respectively applied to the upper surfaces excluding, and the upper surfaces excluding the sliding contact portions of the front surface of the grate 1 and the upper surface of the grate 1 are respectively coated with the refractory 2.

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

  Specifically, the grate 1 is integrally manufactured from heat-resistant steel containing nickel or chromium (for example, JIS standard SCH13, SCH11, SCH2, 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 connected downward at the front end portion 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 connected to the back surface, and an attachment portion 1d connected to the fins 1c and attached to a fixed frame or a movable frame under the stoker are provided.

  The bottom plate 3 is formed of a metal plate (for example, stainless steel plate (SUS304)) 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 surface of the grate 1 to hold the refractory 2 when constructing the refractory 2 in order to prevent the refractory 2 from dropping or missing.

  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. 3, and is attached to the lower end of the front face of the grate 1 by welding in a horizontal posture. ing.

  The rib 4 is formed of a metal plate (for example, stainless steel plate (SUS304)) excellent in heat resistance and corrosion resistance, and forms an enclosure with the bottom plate 3. The rib 4 is attached to the front surface of the grate 1 and holds the refractory 2 when constructing the refractory 2 in order to prevent the refractory 2 from dropping or missing.

  In this embodiment, the ribs 4 are formed in a substantially triangular shape that is lower than the height of the grate 1 and shorter than the width of the bottom plate 3 as shown in FIG. It arrange | positions at equal intervals in the center position, and is attached to the front surface of the grate 1 and the upper surface of the bottom plate 3 by welding in a vertical posture. Further, the ribs 4 at both ends 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 surface of the grate 1.

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

  The bottom plate 3 and the rib 4 attached to the front surface of the grate 1 surround the lower area of the front surface of the grate 1 with the front side and the upper side open, and the refractory 2 is placed in the enclosed space. It is to be constructed.

  The refractory 2 is made of an indeterminate refractory such as a castable refractory, a plastic refractory, or a refractory mortar. It is applied to the upper surface (the upper surface of the tip part of the grate 1) excluding the sliding contact portion, and covers the upper surface excluding the front surface of the grate 1 and the other grate of the grate 1 upper surface. ing. The material of the amorphous refractory may be any material as long as it has heat resistance, corrosion resistance, adhesion, and the like. For example, silicon carbide refractories, magnesia-chromium refractories, alumina System refractories, silica refractories, etc. are used.

  Next, the refractory 2 is applied to the upper surface (the upper surface of the tip of the grate 1) excluding the portion that is in sliding contact with the front surface of the grate 1 and the other grate 1 on the upper surface of the grate 1, respectively. A case where a grate is formed will be described.

  In this case, the refractory 2 may be applied to the newly prepared grate 1 to form a refractory-covered grate, or the refractory 2 may be applied to the existing stoker grate 1. 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, the bottom plate 3 and the rib 4 are welded to the front 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 left-right direction on the fixed frame or movable frame under the stoker, and each grate 1 is made up of bolts, nuts, etc. Attached to a fixed frame or a movable frame with fasteners (not shown). The bottom plate 3 and the rib 4 may be attached before the grate 1 is arranged in parallel, or may be attached after the grate 1 is arranged in parallel.

  Each grate 1 arranged in parallel is adjacent to each other so that there is a gap (expansion allowance) between adjacent grate 1 and between ribs 4 at both end positions of the front side of grate 1. A grate gap plate 6 as shown in FIG. 4 is inserted between the lattices 1 (see FIG. 5). The grate gap plate 6 is a fit kill. A gap (expansion allowance) 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 plate or a plastic plate), and when the waste is burned on the stoker, it burns with the waste and disappears. ing. As a result, a gap (expansion allowance) is formed between the left and right grate 1 adjacent to each other. The grate gap plate 6 includes a knob 6a that protrudes upward from the upper surface of the grate 1 so that the position can be easily adjusted after being inserted between adjacent grate 1s.

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

  At this time, the refractory 2 is constructed integrally with a plurality of grate 1 arranged in parallel in the left-right direction. Thereby, the refractories 2 on the adjacent grate 1 are integrated (refer FIG. 7).

  Finally, when it is confirmed that the refractory 2 is completely cured, the mold is removed. In this way, a refractory coated grate is formed.

  In the above embodiment, the refractory 2 is applied to the newly prepared grate 1 to form a refractory-covered grate. In other embodiments, the fire of an existing stoker is used. The refractory 2 may be applied to the grid 1 to form a refractory-covered grate.

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

  In this way, the refractory-covered grate has the top surface of the grate 1 and the upper surface of the grate 1 except for the portions that are in sliding contact with the other grate, respectively, covered with the refractory 2. Even if the amount of combustion air for cooling the grid 1 is reduced or high-calorie waste is burned, the temperature of the grate 1 does not easily become high, and the grate 1 is burned out or hot-corroded. It becomes difficult to cause. As a result, the life of the refractory-coated grate can be extended.

  Further, the refractory-covered grate gradually wears out the refractory 2 due to long-term use, but if the refractory 2 is repaired before the front and top surfaces of the grate 1 are exposed, It hardly causes hot corrosion.

  Furthermore, when repairing the refractory 2 covered with the grate 1, the refractory-covered grate can repair the refractory 2 for about 1 to 2 days. Such a cost is also ½ to ３ compared to the case where the grate 1 is replaced. For example, in the case of the grate 1 without the refractory 2, it takes about 5 million yen per year to replace the grate 1, but in the case of a refractory-covered grate, about a year to replace the refractory 2 It costs 2 million yen.

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

  Furthermore, since the refractory-coated grate has the front surface and the top end surface of the grate 1 covered with the refractory 2, no cooling water or power is required compared to the water-cooled grate 1 and the cost is reduced. Can be achieved.

  9 and 10 show a stalker using a refractory-covered grate according to another embodiment of the present invention (for example, a dry stalker, a combustion stalker or a post-combustion stalker of a stalker-type incinerator), A fixed grate row A and a movable grate row B that are formed by combining the grate 1 in parallel in the left-right direction are alternately arranged in a stepwise or inclined manner in the front-rear direction (the flow direction of waste such as municipal waste). The tip of each movable grate row B is slid on each fixed grate row A, and the waste is burned on the grate 1 that is arranged in the left-right direction and the front-rear direction to form the hearth. It is a thing.

  As shown in FIG. 9, the refractory-covered grate according to another embodiment of the present invention includes a grate 1, a bottom plate 3 and ribs 4 that are attached to the front surface of the grate 1 and form an enclosure, and a grate 1. A plurality of anchors 5 attached to the front surface and the upper surface of the fire grate, and a refractory 2 covering the upper surface (the upper surface on the tip 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; It has.

  The grate 1, the bottom plate 3, the rib 4 and the refractory 2 are configured in exactly the same way as those of the refractory-covered grate shown in FIGS. 1 and 2, so detailed description thereof is omitted here. . The same reference numerals are assigned to the same parts and members as the refractory-covered grate shown in FIGS. 1 and 2.

  In order to prevent the refractory 2 from dropping off or missing, a plurality of the anchors 5 are provided on the upper surface (the upper surface on the tip portion 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. The book is attached.

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

  The anchor 5 attached to the front surface of the grate 1 is formed in an eye smaller than the anchor 5 attached to the upper surface of the grate 1 and protrudes forward at a substantially middle height position of the front surface of the grate 1. And spaced apart so as not to interfere with each other, and are attached to the front surface of the grate 1 by welding.

  Further, the anchor 5 attached to the upper surface of the grate 1 is formed to be approximately twice the size of 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 arranged in a posture 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 for the anchor 5. In other embodiments, a V-type anchor, a spiral anchor, various stud anchors, etc. are used in addition to the Y-type anchor. Alternatively, several types of each of the anchors may be used in combination.

  Next, the case where the refractory-covered grate shown in FIGS. 9 and 10 is formed will be described.

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

  When a refractory 2 is applied to a newly produced grate 1 to form a refractory-covered grate, first, a grate and anchor made of a bottom plate 3 and ribs 4 are provided on the grate 1 as shown in FIG. 5 is attached by welding, and the grate 1 is arranged in parallel in the left-right direction on a fixed frame or a movable frame under the stoker, and each grate 1 is fixed to the fixed frame by tightening tools (not shown) such as bolts and nuts. Or attach to a movable frame. The bottom plate 3, the rib 4 and the anchor 5 may be attached before the grate 1 is arranged in parallel, or may be attached after the grate 1 is arranged in parallel.

  Each grate 1 arranged in parallel is adjacent to each other so that there is a gap (expansion allowance) between adjacent grate 1 and between ribs 4 at both end positions of the front side of grate 1. A grate gap plate 6 as shown in FIG. 4 is inserted between the lattices 1 (see FIG. 12).

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

  At this time, the refractory 2 is constructed integrally with a plurality of grate 1 arranged in parallel in the left-right direction. Thereby, the refractories 2 on the adjacent grate 1 are integrated (refer FIG. 14).

  Finally, when it is confirmed that the refractory 2 is completely cured, the mold is removed. In this way, a refractory coated grate is formed.

  In the above embodiment, the refractory 2 is applied to the newly prepared grate 1 to form a refractory-covered grate. In other embodiments, the fire of an existing stoker is used. The refractory 2 may be applied to the grid 1 to form a refractory-covered grate.

  The refractory-covered grate shown in FIG. 9 and FIG. 10 covers the upper surface of the grate 1 excluding the front part of the grate 1 and the other grate 1 on the upper surface of the grate 1 with the refractory 2. Therefore, the same operational effects as the refractory-covered grate shown in FIGS. 1 and 2 can be obtained. In particular, in the refractory-covered grate shown in FIGS. 9 and 10, an anchor 5 is attached to the grate 1 in addition to the enclosure composed of the bottom plate 3 and the rib 4, and the front side of the grate 1 is buried so that the anchor 5 is buried. Since the refractory 2 is constructed on the top surface of the tip portion, it is possible to further prevent the refractory 2 from dropping or missing, and the grate can be used in a stable state for a longer period than 1.

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

  That is, the refractory-covered grate includes a grate 1, a bottom plate 3 and a rib 4 that are attached to the front face of the grate 1 to form an enclosure, and another grate on the front face of the grate 1 and the top face of the grate 1. And a refractory 2 that covers the upper surface (the upper surface on the tip end side of the grate 1) excluding the portion that is in sliding contact with the base 1, and the upper surface on the front end side of the horizontal plate portion 1a of the grate 1 It is formed lower than the side upper surface, and 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.

  This refractory-covered grate has the same structure as the refractory-covered 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 parts and members as those of the refractory grate shown in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

The refractory-covered grate shown in FIG. 16 can achieve the same effects as the refractory-covered grate shown in FIGS. 1 and 2. Moreover, since the upper surface of the refractory 2 is flush with the upper surface of the base plate side of the horizontal plate portion 1a of the grate 1, the refractory-covered grate is configured to feed waste on the refractory-coated grate. Can be performed smoothly and smoothly.
Of course, the anchor 5 shown in FIGS. 9 and 10 may be attached to the refractory-covered grate.

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

  That is, the refractory-covered grate has a grate 1, a bottom plate 3 and rib 4 that are attached to the front surface of the grate 1 to form an enclosure, and the bottom plate 3 and rib 4 are detachably attached to the front surface of the grate 1. A plurality of connecting fittings 8 to be attached and a refractory 2 that covers the front surface of the grate 1 are provided, and the refractory 2 is preliminarily constructed at a factory or the like on the bottom plate 3 and the rib 4 that form the enclosure. A bottom plate 3 and a rib 4 in which a refractory 2 is applied to the front surface of a grate 1 are attached by a connecting metal fitting 8.

  The bottom plate 3 is formed in a L-shaped cross section by a metal plate such as a stainless plate having excellent heat resistance and corrosion resistance, and is connected to a vertical portion of the bottom plate 3 (a portion that contacts the front surface of the grate 1). Through holes through which the metal fittings 8 are inserted are formed at regular intervals along the width direction of the grate 1.

  The ribs 4 are formed in the same shape as the ribs 4 shown in FIG. 3 with a metal plate such as a stainless steel plate having excellent heat resistance and corrosion resistance, and are arranged at equal intervals at both ends and the center of the bottom plate 4. The bottom plate 3 is attached to the vertical and horizontal portions by welding in a vertical posture.

  Furthermore, the connecting fitting 8 includes a through hole formed in the bottom plate 3 and a bolt 8a inserted through the through hole formed in the vertical plate portion 1b of the grate 1 and two nuts detachably screwed to the bolt 8a. 8b, and a bolt 8a attached to the bottom plate 3 is inserted into a through-hole formed in the vertical plate portion 1b of the grate 1 and a nut 8b is fastened to the bolt 8a, whereby the bottom plate 3 and ribs on which the refractory 2 is constructed 4 can be attached to the front surface of the grate 1, and the nut 8 b is loosened and the bolt 8 a is pulled out from the through-hole of the grate 1, so that the bottom plate 3 and the rib 4 on which the refractory 2 is constructed are grate 1. Can be removed from the front of the.

  In the above-described embodiment, the connection fitting 8 including the bolt 8a and the nut 8b is used as the connection fitting 8. However, in other embodiments, pins, levers, cams and the like are provided on the connection fitting 8, although not illustrated. A conventionally known quick pin provided may be used.

The refractory-covered grate shown in FIG. 17 can achieve the same effects as the refractory-covered grate shown in FIGS. 1 and 2. Moreover, this refractory-coated grate has a bottom plate 3 and a rib 4 that form an enclosure on the front surface of the grate 1 and is detachably attached by a connecting metal fitting 8, so that the refractory 2 that has been worn out or burned out can be easily replaced. Easy to do. In particular, when a quick pin is used for the connection fitting 8, the bottom plate 3 and the rib 4 on which the refractory 2 is applied can be attached to and removed from the grate 1 more easily and easily.
Of course, the anchor 5 shown in FIGS. 9 and 10 may be attached to the refractory-covered grate.

  FIG. 18 shows a stalker using a refractory-covered grate according to still another embodiment of the present invention, and the refractory-covered grate used for the stalker is a surface on the combustion side of the grate 1. The refractory 2 is applied to the upper surface of the grate 1 except for the portion that is in sliding contact with the front surface of the grate 1 and the other grate 1 on the upper surface of the grate 1. The upper surface excluding the portion in sliding contact with the grid 1 is covered with the refractory 2, and the refractory 2 and the bottom plate 3 and the rib 4 forming the enclosure are detachable.

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

  That is, the refractory-covered grate includes a grate 1, a bottom plate 3 and a rib 4 that are attached to the front surface of the grate 1 and an upper surface on the tip side, and forms an enclosure, and the bottom plate 3 and the rib 4 are attached to the grate 1. A plurality of connecting fittings 8 that are detachably attached to the front surface and the front end side upper surface, and a refractory 2 that covers the front surface and the front end side upper surface of the grate 1, are provided on the bottom plate 3 and the rib 4 that form an enclosure. The refractory 2 is preliminarily constructed in a factory or the like, and the bottom plate 3 and the rib 4 in which the refractory 2 is constructed on the front surface and the tip side upper surface of the grate 1 are attached to the grate 1 by connecting metal fittings 8.

  The bottom plate 3 is formed of a metal plate such as a stainless steel plate having excellent heat resistance and corrosion resistance, a vertical portion that comes into contact with the front surface of the grate 1, a horizontal portion that is connected to the lower end of the vertical portion, And an upper horizontal portion that is connected to the upper end of the vertical portion and abuts against the top surface of the grate 1. In the vertical portion and the upper horizontal portion of the bottom plate 3, through-holes through which the connection fittings 8 are inserted are formed at regular intervals along the width direction of the grate 1.

  The ribs 4 are formed in the same shape as the ribs 4 shown in FIG. 3 with a metal plate such as a stainless steel plate having excellent heat resistance and corrosion resistance, and are arranged at equal intervals at both ends and the center of the bottom plate 4. The bottom plate 3 is attached to the vertical and horizontal portions by welding in a vertical posture.

  Further, the connecting fitting 8 is composed of a bolt 8a and a nut 8b. The bolt 8a attached to the vertical portion of the bottom plate 3 is inserted into a through hole formed in the vertical plate portion 1b of the grate 1, and the upper portion of the bottom plate 3 is inserted. Bolts 8a are respectively inserted into through-holes formed in the horizontal portion and through-holes formed in the horizontal plate portion 1a of the grate 1, and a base plate 3 and ribs on which the refractory 2 is constructed by tightening a nut 8b to each bolt 8a. 4 is attached to the front surface of the grate 1 and the top surface on the front end side, and the bottom plate 3 on which the refractory 2 is constructed by loosening the nut 8b and pulling out each bolt 8a from the through hole of the grate 1 and The rib 4 can be removed from the front surface of the grate 1 and the top surface on the tip side.

  In addition, when the bottom plate 3 and the rib 4 on which the refractory 2 is applied are attached to the grate 1 by the connecting bracket 8, a part of the upper surface of the horizontal plate portion 1a of the grate 1 (the connecting bracket 8 is inserted). Since 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, the connecting bracket 8 and the horizontal plate projecting upward from the horizontal plate portion 1a. The upper surface of the part 1 a is covered with the refractory 2. At this time, the upper surface of the refractory 2 previously applied to the bottom plate 3 in a factory or the like and the upper surface of the refractory 2 applied on-site are made to be flush with each other.

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

  The shape and configuration of the refractory-covered grate are not limited to those according to the above-described embodiments, but other than the front of the grate 1 or the front of the grate 1 and the upper surface of the grate 1 Any shape and configuration may be used as long as the upper surface except the sliding contact portion with the grate is covered with the refractory 2.

  In addition, the refractory-covered 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 made of an irregular refractory. Alternatively, 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 covered with a regular refractory such as a refractory brick.

  Further, in each of the above embodiments, the enclosure made of the bottom plate 3 and the ribs 4 is provided on the front surface of the grate 1, but in other embodiments, a receiver made of the bottom plate 3 is attached to the front surface of the grate 1, The refractory 2 may be prevented from falling off or missing. Moreover, you may use combining the receiver 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 material, 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 (6)

  The fixed grate rows and the movable grate rows, which are formed by arranging the grate in parallel in the left-right direction, are alternately arranged stepwise in the front-rear direction and inclined, and the tip of each movable grate row is fixed to each fixed fire. A stoker grate that is slid on the grate train and burns waste and fuel on the grate of each grate row, wherein the grate of the grate on the combustion side surface of the grate A refractory is applied to the front surface, or the front surface of the grate and the upper surface of the grate except for the portion that is in sliding contact with the other grate, and the front of the grate, or the front of the grate and the upper surface of the grate. A refractory-covered grate characterized in that the upper surface except for a portion in sliding contact with another grate is covered with a refractory.   To prevent the refractory from falling off or missing, a metal plate enclosure or receptacle is provided on the front of the grate, and it slides on the front of the grate or on the front of the grate or other grate on the top of the grate. Install refractories on the top surface excluding the contact parts, and use refractories on the front side of the grate, or on the top surface excluding the part that slides in contact with the front of the grate and other grate on the grate top. The refractory-coated grate according to claim 1, which is coated.   In order to prevent refractories from falling off or missing, each anchor is attached to the front surface of the grate, or to the top surface excluding the portion that is in sliding contact with the front surface of the grate and the other grate on the top of the grate. The refractory is constructed on the front surface of the grate, or on the upper surface of the grate, except for the portion that is in sliding contact with the front surface of the grate and the other grate on the top of the grate, or the front surface of the grate, or The refractory-covered grate according to claim 1 or 2, wherein the top surface of the grate and the upper surface excluding a portion in sliding contact with the other grate on the grate upper surface are respectively coated with a refractory. .   On the front surface of each grate arranged in parallel in the left-right direction, or on the top surface excluding the portion in sliding contact with the front of each grate arranged in parallel in the left-right direction and the other grate on the top of each grate Excluding the part where each refractory is constructed in one piece and the front surface of each grate arranged in parallel or the front surface of each grate arranged in parallel and the other grate on the top of each grate are in sliding contact The refractory-covered grate according to claim 1, wherein the upper surface is covered with an integral refractory.   The refractory-covered grate according to claim 2, wherein an enclosure or a receiver provided on the front surface of the grate is detachably attached to the front surface of the grate via a connecting metal fitting.   The refractory-coated grate according to claim 5, wherein a refractory is preliminarily applied to the enclosure or the receiver.

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