JP5871541B2 - Stoker-type incinerator grate mounting structure and stoker-type incinerator - Google Patents

Description

  The present invention relates to a grate mounting structure that constitutes a fixed grate and a movable grate of a stoker-type incinerator, and a scraper that is attached to the lower part of the grate and slides with the grate to scrape off deposits on the grate. About.

As an incinerator for a waste incineration facility that detoxifies harmful substances generated along with incineration of combustible waste, a fixed grate row and a movable grate row are juxtaposed along the widthwise row of the incinerator, and the incinerator A row-and-stage reciprocating stoker-type incinerator in which the fixed grate rows and the movable grate rows are alternately arranged in a stepwise manner in the longitudinal direction (the transfer direction of the incineration object) is widely used. Yes.
In recent years, in addition to the function as an incineration process, many of the waste treatment facilities have a function of a power plant for generating power by attaching a boiler and a turbine generator as a heat recovery facility. The power plant needs to have a stable power supply function for a long period of time, and is required to be able to operate stably and stably without stopping the incinerator.

  As the fixed grate 100A and the movable grate 100B constituting the stalker of such a stoker type incinerator, as shown in FIG. 8, for example, grate holders that are grate receiving members at the upper ends of the fixed frame 101A and the movable frame 101B, respectively. The beam 102 is fixed, the engaging hole 103a provided at the rear part of the scraper 103 is fitted into the protrusion 102a provided at the tip of the grate receiving beam 102, the scraper 103 is attached, and the grate holder to which the scraper 103 is attached. The grate 104 is placed on the beam 102, and the recess 104 a provided on the lower surface of the rear part of the grate 104 is fitted to the protrusion 102 b provided on the rear part of the grate support beam 102, so that the grate 104 is grate receiving beam 102. What was comprised so that it might be supported on was known (for example, refer patent document 1).

  In addition, an elastic body such as a spring is installed below the grate supported on the fixed frame and the movable frame, and one end of this elastic body is connected to the lower part of the grate to constantly bias the grate downward. The thing of the structure installed by doing is known (for example, refer patent document 2, 3).

JP 2002-323214 A Japanese Patent Publication No. 50-4891 JP 2000-161642 A

The structure shown in FIG. 8 can be attached by fitting the grate 104 into the protrusion 102b provided on the grate receiving beam 102. The installation of the grate 104 does not require any special work. The grate 104 can be easily exchanged from the inside of the incinerator, that is, from the upper side of the grate 104.
However, with this configuration, in the process of moving the incineration object by moving the movable grate 100B back and forth on the fixed grate 100A, hard foreign matter in the incineration object is removed by the scraper 103 and the grate 104. The grate 104 is lifted up from the grate receiving beam 102 by pushing in a wedge shape from the gap between the tips of the grate to the lower side of the grate 104 or by depositing small foreign objects on the lower side of the grate 104. May fall off from the grate receiving beam 102 and be damaged, or a mass of the incineration object to be burned may fall through the lower side of the raised grate 104.
Also, due to the rise of the grate 104, the primary combustion air supplied from the incinerator wind path below the grate 104 is concentrated on the lifted part and is ejected to the inside of the furnace, causing uneven combustion and the part of the grate 104 High temperature oxidation burnout, and the durability of the grate 104 is significantly reduced.

In this case, although never grate 104 from floating when fixing the grate 104 on the top surface of the grate receiving beam 102, without the degree of play is displaced vertically upwardly into the grate 104, the fixed grate 100A and movable If the sliding surface of the grate 100B is significantly worn, and a hard foreign object bites into the lower surface of the grate 104 or the lower surface of the scraper 103 in a wedge shape when the movable grate 100B slides on the upper surface of the fixed grate 100A. The grate 104 may be broken by upward bending stress.
Since the grate 104 is used in a high temperature / corrosive environment and has a complicated shape, heat-resistant cast iron or heat-resistant cast steel is usually used as a molding material. A cast product has a lower bending strength and impact resistance than a non-cast product such as carbon steel, and needs to have a structure that avoids the bending stress described above.

Further, in Patent Document 3, the bending stress is avoided by configuring the grate so that the tip side of the grate is lifted to some extent by constantly pressing and pressing the grate downward with an elastic body provided below the grate. In this configuration, the grate is installed or replaced from the bottom of the incinerator in a poor working environment with fallen ash, molten metal, tar (carbonized matter), etc. In addition, a special member and complicated work are required for attaching the grate, and it is inferior in terms of workability and maintainability.

In view of the above-described problems of the prior art, the present invention is necessary while securing the degree of freedom of upward displacement of the grate to the extent that it does not hinder the longitudinal sliding movement of the movable grate on the fixed grate. It is a problem to reliably prevent the grate from rising and to easily install and replace the grate from the inside of the incinerator without using special parts or tools. And
In addition, as mentioned above, the waste treatment facility is required to operate stably as a power generation facility for a long period of time. Therefore, it is required to reduce the chance of shutting down the incinerator as much as possible, and to perform periodic inspections and maintenance in a short period of time. In view of the above, the problem to be solved by the present invention is to reduce accidents caused by the grate by facilitating and simplifying the installation of the grate and to facilitate inspection and maintenance.

In order to solve the above problems, the grate mounting structure of the stoker-type incinerator according to the present invention is provided with a holding unit for holding the rear end of the grate in a support position on a grate receiving member that supports the grate. And an engaging portion on the lower side of the grate, and an engaged portion that is a portion where the engaging portion engages with the grate receiving member,
In addition, the engaged portion and the engaged portion are vertically moved with the engaged portion positioned above the engaging portion in a state where the holding lattice is held at the supporting position by the holding portion on the grate receiving member. Are arranged at intervals ,
The grate has a configuration in which a front end side of the grate is attached to a grate receiving member so as to be displaceable upward to a position where the engaging portion and the engaged portion are engaged with a rear end as a fulcrum .

According to this, the engaging portion and the engaged portion provided on the grate and the grate receiving member that supports the grate are displaced on the grate supported on the grate receiving member upward from the support position. Are installed so as to be opposed to each other with a predetermined gap along the vertical direction in a state where the grate is supported on the grate receiving member.
Since the grate is attached to the grate receiving member in a so-called semi-fixed state that can be displaced upward to a position where the engaging portion and the engaged portion are engaged, the movable grate is moved forward and backward on the fixed grate. When moving the grate, the grate of the movable grate smoothly slides on the fixed grate while slightly shifting the front end side with the rear end as a fulcrum, and the sliding surface wears significantly, Hard foreign matter in the incineration object is not wedged into the grate or the lower surface of the scraper attached to the front end of the grate receiving member together with the grate and bending stress is not applied to the grate.
Further, even if a small foreign object in the object to be incinerated is bitten and the foreign object enters the lower side of the grate from the front end of the grate, the engaging part and the engaged part are accompanied by the upward displacement of the grate. Engagement further restricts further upward displacement of the grate, which prevents large foreign objects from entering the lower side of the grate and prevents small foreign objects from accumulating on the lower side of the grate. It is possible to reliably prevent the lattice from being lifted or dropped from the grate receiving member.

  In the grate mounting structure configured as described above, the grate placed on the grate receiving member has a rear wall portion between the front and rear projections protruding from the rear upper surface of the grate receiving member. And is engaged with the front projection by a fixture provided on the rear projection and is held at a support position. In this state, the engagement portion and the engaged portion are in a vertically opposed position. In the state where the fixing tool is removed and the grate placed on the grate receiving member is moved to a position where the rear wall part joins the rear protrusion, the engaging part and the engaged part are engaged. The joint portions are arranged so as to be displaced from each other in the front-rear direction. In this state, the grate can be removed from the grate receiving member.

According to this, the grate is mounted by placing the grate on the grate receiving member, and engaging the rear wall portion of the grate between the front and rear projections provided on the grate receiving member, In a state where the grate is slid forward on the grate receiving member to a position where the rear wall is joined to the front projection, a rear wall portion of the grate is provided on the front projection and the rear projection. It can be performed by sandwiching and fixing with a fixed fixture. Also, if the fixing tool is removed and the grate is slid rearward on the grate receiving member, the engaging part and the engaged part are arranged to be displaced from each other in the front and rear, and if the grate is lifted upward as it is, It can be removed from the grate receiving member.
In this way, the grate can be attached and detached by operation above the grate inside the incinerator, so that the construction of the incinerator accompanying the installation of the grate can be done with simple work, and the grate is replaced. It is possible to perform maintenance such as in a short time without trouble.
The fixing tool is a member that can be attached to and detached from the rear projection of the grate receiving member, and is attached to the rear projection to push the rear wall portion of the grate forward and forward projection. A member that functions to be sandwiched between and fixed thereto, for example, an elastic body such as a bolt or a spring, can be used.

Further, as another aspect of supporting the grate on the grate receiving member, in the grate mounting structure having the above-described configuration, the grate placed on the grate receiving member has a rear wall portion, and the grate receiving member. Engagement between the front protrusion and the rear protrusion projecting from the rear surface of the upper surface of the upper surface of the front protrusion, and the spacer is mounted between the rear wall and the rear protrusion. In this state, the engaging portion and the engaged portion are disposed at the vertically opposed positions, the spacer member is removed, and the grate placed on the grate receiving member is In a state where the rear wall portion has moved to a position where it is joined to the rear protrusion, the engaging portion and the engaged portion are displaced from each other in the front-rear direction. In this state, the grate is removed from the grate receiving member. It can also be configured to be able to.
The installation of the grate by this, put the grate on the grate receiving member, in a state where the rear wall portion of the grate is engaged between the front and rear projections provided on the grate receiving member, The grate is slid forward on the grate receiving member until the rear wall is joined to the front protrusion, and a spacer member is loaded between the rear wall and the rear protrusion. This can be done by sandwiching and fixing the rear wall portion of the grate between the member and the front projection. Also, if the spacer member is removed from the loading position and the grate is slid rearward on the grate receiving member, the engaging part and the engaged part are displaced from each other in the front and rear directions, and the grate is lifted upward. Then, it can be removed from the grate receiving member.
In this case, it is preferable that the spacer member is fixed at the loading position by a fixing tool provided on the rear protrusion, and the spacer member can be removed from the grate receiving member by releasing the fixing by the fixing tool. By using the spacer member and the fixture, a large slidable range of the grate on the grate receiving member can be secured, and after fixing the spacer member at the loading position with the fixture, The fixed state can be stabilized by sandwiching the wall portion between the front protrusion of the grate receiving member and the spacer member.

  In the grate mounting structure configured as described above, the engaging portion and the engaged portion are separated from each other when the grate is attached to the grate receiving member, and are mutually separated when the grate is displaced upward. By engaging, it means a part that functions to regulate upward displacement of the grate above the engagement position. An engaging protrusion is provided on the lower side of the grate as the engaging portion, and an engaging concave portion having a hook-shaped concave portion as an engaging surface is provided on the grate receiving member as the engaged portion. Can do. Or you may comprise the thing of appropriate engagement aspects, such as an engagement protrusion and engagement recessed part which mutually engage, in each corresponding position.

Further, the present invention is an incineration target object that is in the lower part of a plurality of grate supported on the grate receiving member and is inserted between the grate lower surface and the scraper upper surface at the tip of the grate receiving member. It is characterized by having a configuration in which a scraper provided with a notch portion at the rear end portion for dropping and sequentially discharging the foreign matter is dropped below the scraper .
In a stoker-type incinerator configured by attaching a scraper to a grate receiving member together with a grate, by providing a notch at the rear of the scraper in this way, foreign matter that has entered the lower side of the grate can be removed. The foreign matter can be dropped from the notch to the lower side of the incinerator, and the foreign matter is not sequentially discharged from the notch and deposited between the lower surface of the grate and the upper surface of the scraper. The grate will not lift or fall off due to the lump.

Further, the stoker-type incinerator of the present invention is characterized in that it has a configuration in which a grate is attached by the grate attachment structure of the above-described configuration , and further, at the front end of the lattice receiving member to which the grate is attached, It has the structure to which the scraper of the said structure was attached.
Note that the scraper of the present invention exhibits an effect to prevent the grate from being lifted up or dropped off even when attached with the conventional grate shown in FIG.

It is a block diagram which shows the hearth part of the stoker type incinerator in one Embodiment of this invention. FIG. 2 is a schematic cross-sectional configuration diagram showing, in an enlarged manner, the configurations of a fixed grate and a movable grate of a stalker in the stalker type incinerator of FIG. 1. (A), (B) is a perspective view of the upper surface side and lower surface side of the grate of FIG. 2, respectively. (A), (B) is the perspective view of the upper surface side and lower surface side of the scraper of FIG. 2, respectively. (A)-(C) is a schematic sectional block diagram of a fixed grate and a movable grate for demonstrating the procedure which attaches a grate and a scraper to a grate receiving beam. (A)-(C) are the figures for demonstrating arrangement | positioning of the axial pin which is an engagement protrusion by the difference in the position of the grate on a grate receiving beam, and a hook-shaped engagement recessed part. It is the schematic sectional block diagram which expanded and showed the structure of the fixed grate and the movable grate in the other form of this invention. It is the general | schematic cross-section block diagram which expanded and showed the structure of the fixed grate and the movable grate in the conventional example grate.

Preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram showing a hearth part of a stoker-type incinerator according to an embodiment of the present invention. As shown in the figure, the stoker-type incinerator 1 has an incineration object on its hearth part 11. The stokers 2 are arranged in multiple stages in each treatment region of the drying 2a, the combustion I2b, the combustion II2c, and the post-combustion 2d along the transfer direction. In the figure, reference numeral 12 denotes an air passage, and the illustrated hearth part 11 has a left and right two-row unit configuration in which an intermediate partition 3 is provided at the center in the width direction of the furnace.

The stalker 2 has the fixed grate 4A row and the movable grate 4B row shown in FIG. 2 alternately arranged along the widthwise row of the hearth portion 11, and the fixed grate 4A in the longitudinal direction of the hearth portion 11. Adopting a row-and-row reciprocating motion system in which rows and movable grate 4B rows are arranged stepwise, maintaining a uniform gap between the grate 6 described later, reducing combustion air blow-off and dust fall as much as possible, The stationary grate 4A and the movable grate 4B which are alternately arranged are configured to effectively move, invert and agitate the object to be treated.
In addition, by supporting the grate 6 with a pushing angle of about 15 to 20 degrees and providing the stoker 2 as a whole with an inclination angle of horizontal to about 5 degrees, the incineration object is transported while maintaining a constant layer thickness. In this way, the grate 6 has a structure that does not easily receive combustion heat.

  As shown in FIG. 2, the fixed grate 4A and the movable grate 4B constituting the stalker 2 are integrally fixed with a grate receiving beam 8 as a grate receiving member at the upper ends of the fixed frame 5A and the movable frame 5B, respectively. The scraper 7 is attached to the front end of each grate receiving beam 8, and the grate 6 is attached to the upper surface of the scraper 7 and the grate receiving beam 8.

Specifically, the grate 6 is a cast product made of heat-resistant cast iron or heat-resistant cast steel. As shown in FIG. 3, the front wall portion 62 is disposed at the front end of the rectangular top surface portion 61 and the rear end is disposed at the rear end. Each of the wall portions 63 is suspended, a recess 64 is provided inside the rear wall portion 63, and three inner wall portions 65 are juxtaposed between the front wall portion 62 and the recess portion 64, and the top surface portion 61 and each inner wall portion 65 are arranged. It is formed in the shape of a hollow block in which the internal space partitioned by is used as an air flow passage.
Further, each inner wall portion 65 has a projecting surface portion 65a projecting downward at a position slightly rearward from the middle portion thereof, and is integrally fitted through a shaft pin 66 into a through hole 65b formed in each projecting surface portion 65a. I wear it.

Similar to the grate 6, the scraper 7 is a cast product made of heat-resistant cast iron or heat-resistant cast steel, and as shown in FIG. A notch 72 is provided at the rear end of 71 to divide the leg 71 into three parts, and three arm parts 73 project from the front of the leg 71, and a belt-like shape is formed at the tip of each arm 73. A spatula portion 74 is formed integrally.
The scraper 7 is formed wider than the grate 6 and is attached to the grate receiving beam 8 as a set of a plurality of grate 6 with respect to one scraper 7.

As shown in FIGS. 2 and 5, the grate receiving beam 8 is provided with a protrusion 81 that fits the recess 71 a of the scraper 7 at the front end of the upper surface, and holds the rear end of the grate 6 at the rear of the upper surface. A holding portion 82 is provided, and an engaging recess 83 having a hook-shaped cross section with an upper surface and a front surface as an engaging surface is provided integrally behind the protrusion 81.
The holding portion 82 includes a front projection 82a and a rear projection 82b that are projected in parallel to the rear portion of the upper surface of the grate receiving beam 8 at an appropriate interval, and a spacer member 82c that is loaded between the projections. And a fixing tool 82d such as a bolt which is screwed into a through-hole formed in the rear protrusion 82b and fixes the spacer member 82c between the protrusions. The rear wall 63 of the lattice 6 is engaged between the front protrusion 82a and the rear protrusion 82b, and a spacer member 82c is loaded between the rear wall 63 and the rear protrusion 82b. Is fixed by a fixing tool 82d, so that the rear wall 63 of the grate 6 is sandwiched between the front protrusion 82a and the spacer member 82c, and the grate 6 is held and fixed in the support position. .
Further, the engaging recess 83 is a part to which the shaft pin 66 of the grate 6 is engaged, and although not shown, a plurality of engagements are provided so as to engage with the shaft pin 66 between the projecting surface portions 65a of the grate 6. The joint recess 83 is arranged in a line.
Although not shown in the figure, the grate 6 is not used by pressing the rear wall 63 of the grate 6 forward with the fixing member 82d and pressing the gutter 6 against the front projection 82a of the grate receiving beam 8 without using the spacer member 82c. May be provided so as to be held at the support position. Alternatively, without using the fixing tool 82d, the spacer member 82c may be provided so as to press the rear wall 63 of the grate 6 forward and to be sandwiched between the front protrusion 82a by loading the spacer member 82c. Good.

  The grate 6 and the scraper 7 can be attached to the grate receiving beam 8 by the following procedure to constitute the fixed grate 4A and the movable grate 4B.

First, as shown in FIG. 5 (A), the scraper 7 is disposed above the front end of the grate receiving beam 8, and the concave portion 71 a of the scraper 7 is fitted to the protrusion 81 of the grate receiving beam 8. Is attached to the front end of the grate receiving beam 8.

Next, the grate 6 is disposed above the grate receiving beam 8, and the grate 6 is placed on the upper surface of the grate receiving beam 8 as shown in FIG. Is engaged between the front protrusion 82a and the rear protrusion 82b provided on the grate receiving beam 8.
In a state where the grate 6 placed on the grate receiving beam 8 is located near the rear of the grate receiving beam 8 and the rear wall 63 of the grate 6 is joined to the rear protrusion 82b of the grate receiving beam 8, The shaft pins 66 provided on the lower side of the grate 6 and the engaging recesses 83 provided on the grate receiving beam 8 are arranged so as to be shifted from each other as shown in FIG.

Then, as shown in FIG. 5 (C), the grate 6 located near the rear of the grate receiving beam 8 is slid forward, and the rear wall 63 of the grate 6 is moved to the grate receiving beam 8. The front edge 82a is joined and engaged, and a spacer member 82c is loaded into the space formed between the rear wall 63 and the rear protrusion 82b, and is screwed from the rear of the rear protrusion 82b. Fixing the grate 6 and the scraper 7 is completed by fixing with the combined fixing tool 82d.
In a state where the grate 6 is attached to the grate receiving beam 8, the rear end of the grate 6 is fixed by the holding portion 82 of the grate receiving beam 8 and is held at the support position. As shown in FIG. 6 (B), the engaging recess 83 is disposed at a vertically opposed position with an appropriate interval along the vertical direction.
The removal of the grate 6 and the scraper 7 can be performed in the reverse procedure.

According to the fixed grate 4A and the movable grate 4B of the present embodiment configured as described above, as shown in FIG. 6C, the shaft pin 66 of the grate 6 is engaged with the engaging recess of the grate receiving beam 8. The grate 6 can be displaced upward up to the position where the grate 6 is engaged, that is, the grate 6 is supported on the grate receiving beam 8 in a semi-fixed state.
Since the play that is displaced upward is ensured in the grate 6, when the movable grate 4B slides back and forth on the fixed grate 4A, the grate 6 of the movable grate 4B uses the rear end as a fulcrum. The front end side is smoothly displaced on the fixed grate 4A while being slightly displaced upward, and the sliding surface is significantly worn, or hard foreign matter in the incineration object is applied to the lower surface of the grate 6 or the scraper 7. It does not bite into a wedge shape, and bending stress is not applied to the grate 6.
Even if a small foreign substance in the incineration object is caught and the foreign substance enters the lower side of the grate 6 from the gap between the front end of the grate 6 and the scraper 7, The displacement of the grate 6 is restricted by the engagement of the shaft pin 66 and the engagement recess 83, so that no large foreign matter enters the lower side of the grate 6. It is possible to reliably prevent the beam 8 from being lifted or dropped.
Further, a notch 72 is provided at the rear of the scraper 7, and foreign matter that has entered the lower side of the grate 6 from the gap between the grate 6 and the front end of the scraper 7 is located below the hearth 11 from the notch 72. Since it can be dropped, foreign matter is not deposited between the lower surface of the grate 6 and the upper surface of the scraper 7, and it is possible to prevent the grate 6 from being lifted by a large lump of accumulated foreign matter. .

FIG. 7 shows a fixed grate 4A and a movable grate 4B of the stalker 2 according to another embodiment of the present invention, which are not equipped with a scraper 7 and are attached to the grate receiving beam 8 alone. The cooling gas flow path is provided inside the fixed frame 5A and the movable frame 5B. The grate 6 is attached and detached in the same procedure as described above.
Even in such a configuration in which the grate 6 is attached to the grate receiving beam 8 alone, the shaft pin 66 provided on the lower side of the grate 6 and the grate catch when the grate 6 is displaced upward. Engaging with the engaging recess 83 provided in the beam 8 restricts the grate 6 from being displaced upward beyond the engaging position, and reliably prevents the grate 6 from being lifted or dropped. Is possible.

The illustrated stoker-type incinerator 1, fixed grate 4 </ b> A, movable grate 4 </ b> B, grate 6, scraper 7, and grate receiving beam 8 show an example of an embodiment of the present invention. Is not limited to this, and can be configured in other appropriate forms.
In the illustrated embodiment, a shaft pin 66 that is an engaging protrusion is provided on the grate 6 and a hook-shaped cross-section engaging recess 83 is provided on the grate receiving beam 8, but conversely, on the grate 6 side. An engagement protrusion may be provided on the engagement recess and the grate receiving beam 8 side, and in addition to the engagement protrusion and the engagement recess, an engagement portion and an engaged portion of other engagement modes are provided. May be. Moreover, although the grate receiving beam 8 is illustrated and described as the grate receiving member, a member having a different form may be used as the grate receiving member.

According to the present invention, the following effects can be achieved by the configuration as described above.
By significantly reducing the grate lift and dropout opportunities, stable continuous operation over a long period of time (8000 hours or more) has become possible.
Since the lifting of the grate is eliminated and the installation form of the grate is stabilized, uneven combustion due to partial ejection of primary air and partial high-temperature oxidation burnout of the grate are suppressed, and the life of the grate is prolonged. .
The installation and removal of the grate can be easily performed from the inside of the incinerator, so the maintainability and workability have been improved.
Since the grate maintenance opportunity was reduced, the workload could be reduced.
As a result, the long-term stable operation and inspection and maintenance period required for incineration facilities that have the functions of a power plant can be shortened, the annual operating rate is improved, and a stoker-type incinerator capable of supplying stable power is provided. did it.

1 Stoker-type incinerator, 2 Stoker, 3 Intermediate partition, 4A Fixed grate, 4B Movable grate, 5A Fixed frame, 5B Movable frame, 6 Grate, 66 Axle pin, 7 Scraper, 71a Concave , 8 Grate receiving beam (Grate receiving member), 82 holding portion, 83 engaging recess

Claims (7)

A holding part that holds the rear end of the grate in a supporting position is provided on the grate receiving member that supports the grate by placing it on the lower side of the grate. Engaged parts that are parts where the engaging parts engage are provided,
In addition, the engaged portion and the engaged portion are vertically moved with the engaged portion positioned above the engaging portion in a state where the holding lattice is held at the supporting position by the holding portion on the grate receiving member. Are arranged at intervals ,
The stoker has a configuration in which a front end side of the grate is attached to a grate receiving member so as to be displaceable upward to a position where the engaging portion and the engaged portion are engaged with a rear end as a fulcrum. Mounting structure for the grate of the incinerator. The grate placed on the grate receiving member has its rear wall engaged between a front projection and a rear projection protruding from the upper rear portion of the grate receiving member, and a rear projection. In this state, the engaging portion and the engaged portion are arranged at the vertically opposed positions, and are engaged with the front protrusion by the fixing tool provided in the portion and held between the supporting positions.
In a state where the fixing tool is removed and the grate placed on the grate receiving member is moved to a position where the rear wall portion is joined to the rear protrusion, the engaging portion and the engaged portion are front and rear. 2. The stoker-type incinerator grate mounting structure according to claim 1, wherein the grate is configured to be shifted, and the grate can be removed from the grate receiving member in this state. The grate placed on the grate receiving member has a rear wall inserted between a front protrusion and a rear protrusion protruding from the rear upper surface of the grate receiving member, and the rear wall. Is engaged with the front projection by a spacer member loaded between the rear projection and the rear projection, and is held at the support position. In this state, the engagement portion and the engaged portion are in the vertically opposed positions. And placed
When the spacer member is removed and the grate placed on the grate receiving member is moved to a position where the rear wall portion is joined to the rear protrusion, the engaging portion and the engaged portion are front and rear. 2. The stoker-type incinerator grate mounting structure according to claim 1, wherein the grate is configured to be shifted, and the grate can be removed from the grate receiving member in this state.   The spacer member loaded between the rear wall portion of the grate and the rear projection of the grate receiving member is fixed at the loading position by a fixture provided on the rear projection, and is fixed by the fixture. The structure for attaching a grate for a stoker-type incinerator according to claim 3, wherein the structure is provided so that the grate receiving member can be removed from the grate receiving member by being released.   The engaging portion is provided with an engaging protrusion on the lower side of the grate, and the engaged portion is provided with an engaging recess having a hook-shaped recess as an engaging surface on the grate receiving member. The stoker-type incinerator grate mounting structure according to any one of claims 1 to 4. Foreign matter in the incineration object that has entered the space between the lower surface of the grate and the upper surface of the scraper at the front end of the grate receiving member at the lower end of the plurality of grate supported on the grate receiving member and below the scraper The structure for attaching a grate for a stoker-type incinerator according to any one of claims 1 to 5, wherein a scraper having a notch for dropping and sequentially discharging is provided at a rear end. A stoker-type incinerator having a construction in which a grate is attached by the grate attachment structure according to claim 1 .

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