JP2000028125A - Fire grate structure of refuse incinerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate blockage of combustion without increasing ignition loss by burying a fixed shielding plate at a step part between respective fire grates, arranging a movable fire grate array and a fixed fire grate array from the shielding plate toward the downstream side and adjusting the interval of respective fire grate arrays by means of a side slide plate. SOLUTION: A fixed shielding plate 13 having surface protected with refractories 11 is buried at the lower end of step part between fire grates composed of refractories 11, e.g. refractory caster, and a heat insulating material 12, e.g. heat insulating brick. A movable fire grate array and a fixed fire grate array are arranged from the shielding plate 13 toward the downstream side. The movable fire grate is composed of a set of upper bed plate 2 and a fixed bed plate 4, a plurality of standard bed plates 5 and a single lower bed plate. Similarly, the fixed fire grate is composed of a set of upper bed plate 2 and a fixed bed plate 4, a plurality of standard bed plates 5, a single lower bed plate and a set of double bed plate k and a fixed bed plate 4. Interval of respective fire grate arrays is adjusted by means of a side slide plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grate structure of a refuse incinerator for incinerating refuse such as general waste and industrial waste.

[0002]

2. Description of the Related Art There are many types of combustion grate and post-combustion grate in a refuse incinerator for incinerating refuse such as municipal waste and industrial waste, such as a parallel oscillating type, a stair sliding type, and a reverse type. The parallel swing type which is a premise of the present invention will be described below.

[0003] In the parallel swing type, a plurality of movable grate rows and fixed grate rows are alternately arranged along the direction of waste flow.
The movable grate row is reciprocated at a constant pitch by a drive mechanism, and transfers the refuse supplied into the incinerator while stirring and mixing. As a conventional concrete example, there is one disclosed in Japanese Utility Model Laid-Open No. 55-100843.

FIG. 8 is a vertical sectional side view of a main part of the stoker.
FIG. 9 is a plan view of the stoker, and FIG. 10 is a partially cutaway perspective view of the incinerator stoker.

In FIG. 10, a is a row of movable grate plates, b is a row of fixed grate plates, and d is a grate beam composed of a movable grate beam da and a fixed grate beam (not shown) adjacent to the movable grate beam da. , C are a plurality of standard grate plates arranged on the movable grate beam da and the fixed grate beam.

As shown in FIG. 8, the standard fire plate c has a plurality of ventilation grooves c ₁ formed on the upper surface, a ventilation hole c ₂ formed on the front surface, and an upstream fire plate c on the rear surface. Ventilation hole c
With projections c ₃ is protruded to be inserted into _two, two cooling fins having notches c ₄ for fitting the support bar d ₁ across the grate beam d (see FIG. 10) on the bottom surface c ₅ Is protruding.

Furthermore, e is俯抑freely shielding plate about an axis of rotation e ₁ exposed in the incinerator paragraph portion lower end between the grate, f is slides underneath the shielding plate e It is the upper grate plate. g is a driving device for swinging a movable grate array a composed of the standard grate plate c and the upper grate plate f disposed on the movable grate beam da, and h is a movable grate beam da.
This is a slide plate for determining the swing angle of the slide plate.

J is a great cutter which is lowered by a drive source (not shown) in order to stir the refuse and adjust the fire layer;
k is a double grate plate.

[0009]

However, in the above-mentioned conventional apparatus, the shielding plate e is exposed to the high heat in the furnace and the shielding plate e is exposed.
Body as well as to burn out the rotation axis e ₁ part becomes impossible俯抑, with trouble occurs in the operation of the grate, is damaged by rubbing the upper fire floor f, I had to stop the continuous operation.

Further, there is also a problem that combustion air leaks from a space below the raised shielding plate e to hinder combustion, and unburned refuse falls to increase the loss of burning.

Furthermore, when each fire floor c, f, the burning of k to replace a part, on the shielding plate e is fixed to the structure in the rotation axis e _1, an upper fire floor f Grate beam d
Since the shield plate e must be removed by a method such as burning off with a gas burner, it must be sequentially removed from the upstream side to the corresponding grate plate, which requires a lot of labor under high heat and dust. Needed.

Furthermore, a movable grate row a and a fixed grate row b
It is difficult to maintain a gap between the grate and the grate rows, and the increase in grate plate wear due to friction between the grate rows has been a problem.

[0013]

The grate structure of a refuse incinerator according to claim 1 is installed in a refuse incinerator for incinerating refuse such as general waste and industrial waste, and is provided with a dry grate and combustion fire. The grate, the post-combustion grate, and the like are configured in a step-like manner, and the movable grate row and the fixed grate row constituting the combustion grate and / or the post-combustion grate are alternately arranged on each grate beam. It is a parallel swing grate type grate structure arranged, and a fixed type shield plate whose surface is protected by refractory is buried in the paragraph section between each grate, and downstream from this shield plate Towards the end, the movable grate row is composed of a set of upper grate and fixed grate, a plurality of standard grate and one lower grate, and the fixed grate is also fixed with a set of upper grate. Grate plates, multiple standard grate plates and one lower grate plate inserted into the standard grate row Together they are constituted by a set of double fire floor and the fixed fire floor for rates cutter, interval of the grate rows are those which are adjusted by the side slide plate.

3. The grate structure of a refuse incinerator according to claim 2, wherein the upper surface of the upper grate plate has the same inclination angle as the obliquely up and down swing angle of the movable grate row, and the front portion on the downstream side. The central part has a contact part between the ventilation hole and the engaging projections on both sides and the grate beam, and the rear part on the upstream side has an engaging projection with the grate beam, and both sides have a forward part. An inclined side wall is provided and fixed to the grate beam in cooperation with a fixed grate plate engaged on the downstream side.

In the fire grate structure of a refuse incinerator according to claim 3, the standard grate plate has a plurality of rows of ventilation grooves on an upper surface, and has a ventilation hole at a central portion on both sides and a front surface. The abutting portion with the grate beam is projected at the rear with an engagement projection inserted into the ventilation hole of the upstream grate plate, and the lower surface is provided with a notch for fitting to a support rod crossing the grate beam. A plurality of cooling means such as fins are protruded, and side walls inclined forward are provided on both side surfaces,
The abutment portion and the notch hold the grate beam installed below, and the grate plates arranged in the upstream and downstream directions are mutually engaged. 5. The grate structure of a refuse incinerator according to claim 4, wherein said double grate plate is a groove portion corresponding to a plurality of said standard grate plates and a portion of the standard grate plate located downstream thereof. It is composed of a horizontal part and both side walls corresponding to the minute, and is fixed to the grate beam by a plurality of attachment parts, and is engaged and held with the standard grate plate on the further downstream side by a fixed grate plate arranged on the downstream side. You.

[0016]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially cutaway side view showing an example of a grate structure of a refuse incinerator according to the present invention. FIG. 2 shows an upper grate plate, a fixed grate plate and a standard grate plate on grate beams. FIG. 3 is a schematic side view of the standard fire deck,
4 is a plan view of a standard grate plate, FIG. 5 is a partially broken front view showing the relationship between the standard grate plate and the grate beam, and FIG. 6 is a schematic diagram showing the relationship between the double grate plate and the grate plates before and after it. FIG. 7 is a side view, and FIG. Except for specific parts, the entire configuration of the grate is the same as that of the conventional art, and therefore, the same members and devices as those shown in FIGS. I do.

In FIG. 1, reference numeral 1 denotes a paragraph portion between a grate composed of a refractory 11 such as a refractory caster and a heat insulating material 12 such as an insulating brick. The fixed type shielding plate 13 is embedded.

Reference numeral 3 denotes a grate beam.
Is composed of a plurality of movable grate beams 3a and fixed grate beams 3b.

Reference numeral 2 denotes an upper grate plate, and the upward inclination angle of the substantially square upper surface 21 from the horizontal is determined by the movable grate row a
2, the front part 22 on the downstream side has an upper surface 21 and both side walls 23 as shown in FIG.
A receiving hole 25 for engagement protruding forward from both side walls 23 inclined forward is formed in a central portion.
Are provided on both side surfaces, and an insertion protrusion 26 is projected from a rear central portion on the upstream side.
And the side wall 23
The contact part 27 with the grate beam 3 arranged before and after
The upper grate plate 2 is held on a grate beam 3.

Reference numeral 4 is a fixed fire plate. Fixed fire plate 4
Is an upper surface 41 which is substantially square as shown in FIGS.
A mounting seat 42 is pierced in the center of the
The structure is substantially the same as that of the upper fire floor plate 2 except for a portion, and a rear vertical portion 44 is provided on the receiving projection 25 and a central mounting seat 42.
Is placed on the fixed seat 32 of the grate beam 3, and then the fixed grate plate 4 is fixed to the grate beam 3 by the mounting bolt 45.

After the fixed fire plate 4 is fixed, the mounting seat 42
Is filled with a refractory 46 such as a caster together with the mounting bolt 45.

Reference numeral 5 denotes a standard grate plate. Standard fire plate 5
As shown in FIGS. 2 to 5, a plurality of (three in the illustrated example) ventilation grooves 52 having a trapezoidal vertical cross section are formed in a substantially square upper surface 51. A ventilation hole 56 is formed by the side wall 54 and the hanging portion 55, and a contact portion 57 with the grate beam 3 projects from a front portion of the side wall 54 inclined forward. Due to the overhang of the contact portion 57, the area of the ventilation hole 56 is reduced, and the discharge pressure of the combustion air A is increased. Meanwhile, the rear 5
Projections c ₃ for each fire floor interengagement protrudes to 8.

Further, the lower surface in addition to have two cooling fins c ₅ having a cutout c ₄ for fitting the support bar d ₁ across the grate beam 3 is protruded cooling ribs 59, the person by a contact portion 57 supporting bar d ₁ and the projections c _3, the standard fire floorboard 5 is held by a grate beam 3.

Reference numeral 61 denotes a lower fire floor plate which is located at the lowermost stage of each of the grate rows a and b and slides on the surface of a lower slide plate 63 provided on a refractory dropping block 62.

[0026] j, in order to adjust the agitation of dust and fire layer, is disposed in each fixed grate rows b, a great cutter to俯抑via the drive mechanism j ₁ from the drive source, not shown, At the position where the great cutter j is attached,
A double grate board k is provided, and a fixed grate board 4 is fixed on the downstream side in a manner similar to the upper grate board 2.

The double grate plate k is shown in FIGS. 6 and 7.
As described above, a plurality of standard grate plates 5 (approximately three
The length of the oval shape through which the great cutter j passes with the corresponding length
Groove k ₁Upstream part k with_TwoAnd the standard grate plate 4 on the downstream side
Horizontal part k equivalent to approximately one sheet _ThreeComposed by, as appropriate
The part is fixed to the fixed grate beam 3b.

A plurality of side slide plates 33, which are consumable parts for determining the distance between the movable grate beam 3a and the fixed grate beam 3b, are attached to a plurality of locations outside each grate beam 3 and are adjusted by this adjustment. Abrasion due to contact between the grate plates is prevented, and dust from falling between the movable grate row a and the fixed grate row b due to the left and right movement of the movable grate row a is suppressed.

Next, the operation of the grate during operation of the refuse incinerator configured as described above will be described.

In FIG. 1, the refuse dropped from a dry grate (not shown) onto the combustion grate is sequentially sent forward by the swinging operation of the movable grate row a. That is, the movable grate row a is moved forward and obliquely with the fixed grate row b by moving the movable grate beam 3a obliquely up and down on the slide plate h by the driving device g. This is an operation of transferring, and high-temperature combustion air A from below the grate is efficiently burned by blowing out from the ventilation holes of each grate plate.

If the ventilation progresses due to the progress of the combustion, such as solidification of the dust on the combustion grate, the great cutter j is lowered by a drive source (not shown) to stir the dust layer and adjust the fire layer.

Further, when the main combustion on the combustion grate is completed, the incinerated ash and unburned refuse are transferred from the drop block 62 to the next post-combustion grate via the lower grate plate 61.

Here, since the inclination angle θ of the upper grate plate 2 is the same as the swing angle of the movable grate row a, the shielding plate 13
And the gap between the upper fire floor plate 2 is always constant, yet because they are protected by the refractory 11, is no longer a possibility that the shielding plate body e and the rotation axis e ₁ is burnt as in the prior art.

If a part of each grate plate is burned out and needs to be replaced due to continuous operation for a long period of time, the mounting bolt of the fixed grate plate 4 on the downstream side of the upper grate plate 2 or the double grate plate k is required. By removing the refractory 46 fixing the 45 and extracting the mounting bolts 45, the fixed grate plate 4 can be easily removed, so that the target grate plate can be easily reached, and recovery after mounting is achieved. Is also easy.

In the present description, only the combustion grate has been described, but the invention may be applied to a post-combustion grate irrespective of the presence or absence of a great cutter.

[0036]

As described above, according to the grate structure of the refuse incinerator according to the present invention, the fixed type shield plate is not burned and the operation is not stopped. Does not increase. In addition, the mounting of the side slide plates not only reduces the degree of wear of each grate plate, but also suppresses dust falling between the grate rows.

Further, the work of removing and attaching each grate plate in a poor atmosphere is facilitated.

[Brief description of the drawings]

FIG. 1 is a partially broken schematic side view showing an example of a grate structure of a refuse incinerator according to the present invention.

FIG. 2 is a schematic side view showing a state in which an upper grate plate, a fixed grate plate, and a standard grate plate are mounted on a grate beam.

FIG. 3 is a vertical side view of a standard fire plate.

FIG. 4 is a plan view of a standard fire plate.

FIG. 5 is a partially broken front view showing a relationship between a standard grate plate and a grate beam.

FIG. 6 is a schematic side view showing a relationship between a double grate plate and a grate plate before and after the double grate plate.

FIG. 7 is a schematic plan view showing the relationship between the double grate plate and the grate plates before and after the double grate plate.

FIG. 8 is a vertical sectional side view of a main part of a conventional incinerator stoker.

FIG. 9 is a plan view of the incinerator stoker.

FIG. 10 is a partially cutaway perspective view of a conventional incinerator stoker.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Paragraph part 11 Refractory 13 Shielding board 2 Upper grate board 3 Grate beam 33 Side slide plate 4 Fixed grate board 5 Standard grate board 56 Ventilation hole 57 Contact part a Movable grate row b Fixed grate row c ₃ projection j Great cutter k double grate plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuo Komura 1-6-17 Kyomachibori, Nishi-ku, Osaka City Inside Plantech Inc. (72) Inventor Keiichi Higashino 1-6-17, Kyomachibori, Nishi-ku, Osaka City F-term in Plantech Inc. (reference) 3K065 HA00

Claims (4)

[Claims] An incinerator for incinerating refuse such as municipal solid waste and industrial waste is installed in a refuse incinerator. A dry grate, a combustion grate, a post-combustion grate, and the like are configured in a stepwise manner and the combustion A movable rocking grate row and a fixed grate row constituting a grate and / or a post-burning grate are parallel swinging grate type grate structures alternately arranged on each grate beam, A fixed shield plate whose surface is protected by a refractory is buried in the paragraph section between the grate, and from the shield plate to the downstream side, the movable grate row is composed of a pair of upper grate plate and fixed grate plate. , A plurality of standard grate plates and one lower grate plate, and the fixed grate row also includes a pair of upper grate plates and fixed grate plates, a plurality of standard grate plates, one lower grate plate, and one standard grate plate. It consists of a pair of double grate plates and a fixed grate plate for the great cutter inserted in the floor plate row. With the spacing of the grate column, grate structure incinerator, characterized in that it is adjusted by the side slide plate. 2. The upper surface of the upper grate plate has an inclination angle which is the same as the oblique swing angle of the movable grate row, and the front portion on the downstream side has a central ventilation hole and two side surfaces. The joint portion and the contact portion with the grate beam are provided, and the rear portion on the upstream side is provided with a projection for engagement with the grate beam, and both side surfaces are provided with side walls inclined forward and engaged with the downstream side. The grate structure of a refuse incinerator according to claim 1, wherein the grate is fixed to the grate beam in cooperation with the fixed grate plate. 3. The standard fire plate has a plurality of rows of ventilation grooves on an upper surface, and a contact portion between a ventilation hole at a central portion and a grate beam arranged on both side surfaces at a front surface, and a rear portion at a rear portion. The projections for engagement inserted into the ventilation holes of the upstream grate plate are projected, and cooling means such as a plurality of fins having cutouts to be fitted to the support rods crossing the grate beam are projected on the lower surface. At the same time, side walls inclined forward are provided on both sides, and are held by the grate beams installed below by the abutting portions and the notches, and the grate plates arranged in the upstream and downstream directions are mutually connected. The grate structure of a refuse incinerator according to claim 1, wherein the grate is engaged with the grate. 4. The double grate plate includes a great cutter passage groove portion corresponding to a plurality of the standard grate plates, a horizontal portion located on the downstream side and corresponding to approximately one standard grate plate, and both side walls. And fixed to the grate beam by a plurality of attachment portions, and is engaged and held with a standard grate plate on the further downstream side by a fixed grate plate disposed downstream of the grate beam. The grate structure of the refuse incinerator described.