JPH09222213A - Dust incinerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce grate temperature and keep a long life of a dust incinerator by a method wherein a thermal insulating layer composed of non-ignitable particle substances or powder-like substances is formed between a stoker mechanism and a dust layer. SOLUTION: A dust incinerator is comprised of a dust hopper 2 having a hydraulic driving type pusher mechanism 3 for pushing and feeding dusts to be ignited into an incinerator and of a stoker mechanism 5 having a combustion processing region 22 cooperatively arranged therein. A hydraulic driving type second pusher mechanism 30 for use in supplying ashes of non-ignitable powder substances is arranged below the pusher mechanism 3. Then, a thermal insulating layer 1 is formed between the stoker mechanism 5 and the dust layer 4 and even if the dust of high calorie is locally concentrated, a temperature of a rostole R is prevented from being abnormally increased due to a thermal insulation of the thermal insulating layer 1 and also a high temperature corrosion is prevented from being produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refuse incinerator having a stoker mechanism for burning and conveying refuse while it is being conveyed.

[0002]

2. Description of the Related Art As shown in FIG. 3, a stalker mechanism of a refuse incinerator is horizontally mounted on a fixed frame 24 and a movable frame 25 which can be reciprocally moved back and forth along the carrying direction with respect to the fixed frame 24. The support member 26 is provided with a plurality of rostruls R arranged side by side in the width direction of the incineration zone 22, and the rostruls R and the movable frame 25 provided on the fixed frame 24.
Are arranged alternately along the transport direction. By moving the movable frame 25 back and forth using the hydraulic cylinder 27, the lost frame R arranged on the movable frame 25 is moved to the fixed frame 24. While sliding on the disposed rostrur, the support member 26 is reciprocally moved in an obliquely vertical direction about the axis to push and convey dust by the front end surface of the rostrut R.

[0003]

However, with the recent increase in the calorific value of waste, in the above-mentioned conventional waste incinerator, the waste is directly deposited on the stoker that constitutes the stoker mechanism and incinerated while being transported. Therefore, there is a problem in that the roster becomes extremely hot, and the corrosive gas generated by the burning of dust easily causes burnout. In particular, when a so-called blow-through phenomenon occurs, the dust locally burns at an abnormally high temperature, and the corrosion of the rustle becomes serious. Therefore, it is necessary to develop a highly durable Rostrul material, but it is also necessary to lower the temperature of the Rostrul itself. An object of the present invention is to solve the above-mentioned drawbacks and to provide a refuse incinerator capable of lowering the temperature of the Losttle and maintaining a long life even with the conventional material of Losttle.

[0004]

The first characteristic constitution of the refuse incinerator according to the present invention for attaining this object is, as described in the section of claim 1 of the claims, the stoker mechanism and the refuse layer. And a heat insulating layer made of non-combustible granular material or powdery material is formed between and. The second characteristic constitution of the refuse incinerator according to the present invention is, as described in the section of claim 2 of the claims, to supply the ash recovered from the furnace with the heat insulating layer of the first characteristic constitution. It is configured so that it is formed by the ash from the ash-returning and conveying path arranged in. The third characteristic configuration of the refuse incinerator according to the present invention is, as described in the section of claim 3 of the claims, a pusher lower floor portion for guiding the pusher main body of the pusher mechanism for throwing dust into the furnace, The ash return transport path is connected to supply ash to the ash storage portion formed in the lower portion of the pusher body, and the ash storage portion receives ash from the ash return transport path when the pusher body is retracted, The point is that an ash supply mechanism configured to supply the received ash under the dust to be thrown in as the pusher body advances is provided. The fourth characteristic configuration of the refuse incinerator according to the present invention is, as described in the section of claim 4 of the claims, between the stoker mechanism and the refuse layer below the pusher mechanism for introducing the refuse into the furnace. Second, a second pusher mechanism for supplying non-combustible granular material or powdery material is provided. The fifth characteristic configuration of the waste incinerator according to the present invention is, as described in the section of claim 5 of the claims, a stoker mechanism for incinerating waste while transporting it.
It is that a second pusher mechanism is provided which is continuously provided through the step portion and which supplies the non-combustible granular material or powder material from the step portion between the stoker mechanism and the dust layer.

The operation will be described below. According to the first characteristic configuration, even if high-calorie dust is locally concentrated, since the heat insulating layer is formed between the stoker mechanism and the dust layer, the heat insulation effect makes the Rostl temperature so low. Since it does not become hot, it is possible to avoid the occurrence of hot corrosion, and by composing such a heat insulating layer with non-combustible particles or powder, combustion air supplied from below the rostrur It is possible to do so, and it is possible to secure the dust carrying force due to the movement of the rustle. According to the second characteristic configuration, since the heat insulating layer is formed of ash with high heat insulating performance recovered from the furnace, the ash of recovered ash can be obtained without consuming useful heat insulating granular material or powdery material. Even if there is unburned matter inside, it is possible to surely incinerate it. According to the third characteristic configuration, the ash supply mechanism provided below the pusher mechanism for throwing dust into the furnace reliably supplies the collected ash between the stoker mechanism and the dust layer to form the heat insulating layer. It is possible. According to the fourth characteristic configuration, the second pusher mechanism provided below the pusher mechanism for charging the dust into the furnace ensures that non-combustible particles or powdery substances are present between the stoker mechanism and the dust layer. It is possible to supply it to form a heat insulating layer. According to the fifth characteristic configuration, the second pusher mechanism is configured to supply the non-combustible particulate matter or powdery matter from the step portion of the stoker mechanism between the stoker mechanism and the dust layer. In the stoker mechanism that incinerates while transporting dust, it is possible to form the heat insulating layer from the step that is likely to cause high-temperature corrosion, that is, the step immediately before the site where the dust is burned while transporting dust. It can be incinerated well.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The waste incinerator, as shown in Figure 1,
Dust hopper 2 equipped with a hydraulically driven pusher mechanism 3 that pushes dust to be incinerated into the furnace, a drying zone A for drying the dust thrown into the furnace by pusher mechanism 3, and burning combustion A stoker mechanism 5 constituted by connecting a zone B and an incineration zone 22 composed of a post-combustion zone C to ash through a step portion D, and a wind box also serving as an ash chute installed below the stoker mechanism 5. 6 and the like are arranged in the furnace.

Combustion air from a blower fan 8 is introduced into the wind box 6 through a gas supply path and is supplied to dust above the incineration zone 22. Further, an ash pit 7 for collecting incineration residue ashed by the stoker mechanism 5 is provided, and
A waste heat boiler 10 is provided in the flue 9 formed in the space above the stoker mechanism 5, and the steam generated in the waste heat boiler 10 is supplied to the power generation device 11 to generate power, while the exhaust gas after heat recovery is sprayed with water. Fly ash is collected by a bag filter 13 via a cooling tower 12 for cooling, further purified by a gas purifying device such as a smoke washing device 14, and then exhausted from a chimney 16.

As shown in FIG. 3, the stalker mechanism is provided with a fixed frame 24 and a support member 26 which is horizontally mounted on a movable frame 25 which can reciprocate back and forth along the carrying direction with respect to the fixed frame 24. In the width direction of the incineration zone 22, a plurality of cast rostruls R as shown in FIG. 2 are arranged side by side, and the stove R provided on the fixed frame 24 and the stove R provided on the movable frame 25 are conveyed in the transport direction. The movable frame 25 is reciprocally moved by using the hydraulic cylinder 27, so that the lost frame R arranged on the movable frame 25 is fixed to the fixed frame 24.
By slidingly reciprocating in the up-and-down direction around the support member 26 as a shaft while sliding on the loss tor R arranged in the above, the object to be transferred is pressed by the front end surface of the loss tor R and transferred.

Below the pusher mechanism 3, a hydraulically driven second pusher mechanism 3 for supplying ash which is an incombustible powdery substance.
0 is provided, so that even if the heat insulating layer 1 is formed between the stoker mechanism 5 and the dust layer 4 and the high-calorie dust is locally concentrated, the heat insulating layer 1 performs the heat insulating action. Thus, it is possible to prevent the temperature of the Rostrur R from rising abnormally and causing high temperature corrosion. The ash supplied from the second pusher mechanism 30 is incinerated in the waste incinerator, and a part of the ash dropped on the ash chute is circulated by the conveyor mechanism 32A to the ash hopper 31 provided in the second pusher mechanism 30. And the rest of the ash dropped on the ash chute at the rear end of the post combustion zone C is accumulated in the ash pit 7 by the ash pushing mechanism.

Another embodiment of the invention will be described below.
In the above embodiment, the second pusher mechanism 30 is provided below the pusher mechanism 3, but the increase in the Rostrul temperature is remarkable in the combustion zone B. Therefore, as shown in FIG. , The second pusher mechanism 3 so as to supply the ash forming the heat insulating layer from the step portion D moving from the dry zone A to the combustion zone B.
You may arrange 0. Although the heat insulating layer 1 formed between the stoker mechanism 5 and the dust layer 4 is made of ash in the above embodiment, the heat insulating layer 1 may be any non-combustible granular material other than ash. Materials or powder materials can be used, and for example, granular materials such as sand and gravel, and slag obtained by melting and solidifying ash can be used. In the above embodiment, the second pusher mechanism 30 is provided below the pusher mechanism 3, but the pusher mechanism 3 is accommodated in the lower part of the pusher body 17 as shown in FIGS. 5 and 6. The pusher lower floor part 1 for guiding the pusher body 17 is formed by forming the portion 17a and providing the ash extruding portion 17b supported on the lower portion of the front end portion of the pusher body 17 so as to be swingable forward.
It is also possible to form an ash supply hole 18a in No. 8 and connect the ash return conveyance path 32 to the supply hole 18a so as to supply the ash collected from the furnace into the ash storage section 17a. Since the ash is supplied from below the pusher body 17, the movable support mechanism is different from the conventional one in that the pusher body 17 has the pusher lower floor portion 1
A pusher guide 20 provided on both side portions of 8 holds the pusher guide 20 so as to be movable back and forth, and is driven by a pusher drive mechanism 21 to move back and forth. With this configuration, when the pusher main body 17 retreats, the ash supplied to the ash storage portion 17a stays on the pusher lower floor portion 18 because the ash push-out portion 17b swings and opens downward, and the pusher main body 17 moves forward. At some times, the ash extruding portion 17b swings to close the entire surface of the pusher main body 17, so that the heat insulating layer 1 made of ash that is pushed out together with the thrown-in dust and pushed out between the dust layer 4 and the stoker mechanism 5. Is formed. 8 to FIG.
As shown in 0, it is more preferable to provide the ash supply mechanism 19 including the slide body 19a which is driven back and forth by the drive mechanism 19b in the ash storage portion 17a. The operation of the ash supply mechanism 19 may be performed as follows. While the pusher body 17 is moving forward,
The sliding body 19a is fixed to the pusher main body 17 at the last retracted position in the ash storage portion 17a, and at this position, the ash supply hole 18a opens in the ash storage portion 17a, and the ash return conveyance is performed. While the ash recovered from the passage 32 is supplied into the ash storage portion 17a, the ash push-out portion 17b of the pusher body 17 pushes the ash forward, and the pusher body 1
7, the ash supply hole 18a is closed by the slide body 19a at the forward end position (FIG. 8), and when the pusher main body 17 is retracted, the slide body 19a is stopped while the ash supply hole 18a is closed, and the ash storage portion is closed. While maintaining the ash inside 17a in front of the sliding body 19a and relatively pushing out from the pusher body 17 (FIG. 9), the pusher body is retracted to the retracted end position,
At the retracted end position of the pusher main body 17, the sliding body 19a is moved to the rearmost retracted position to open the ash supply hole 18a, and the ash recovered from the ash return transport path 32 is received inside the ash containing portion 17a (FIG. 10). By doing so, it becomes possible to continuously and quantitatively supply the ash into the furnace. In addition, if the upper end portion of the ash push-out portion 17b of the pusher body is pivotally supported so as to be swingable back and forth, as shown in FIGS.
The ash storage portion 17a is pushed up by the ash during the retreat of 7
The front end of the ash is opened so that the ash inside can be easily stored in the ash storage portion 17a.
The pusher body 17 can be pushed out from the front side. Further, in addition to the above configuration, as shown in FIG. 7, the front end surface of the pusher body 17 may be inclined leftward and rightward from the central portion to both end portions. With such a configuration, even if the width of the ash storage portion 17a is narrower than the width of the pusher body 17, the ash push-out portion 1
Since the ash 7b pushes the ash toward the side wall portion respectively, it is possible to prevent the thickness of the heat insulating layer 1 from being unbalanced, and it is possible to narrow the width of the ash storage portion 17a. As a result, the pusher mechanism 3 The structure of does not have to be complicated.

[0011]

As described above, according to the present invention, it is possible to provide a refuse incinerator having a stoker mechanism capable of lowering the roster temperature and maintaining a long life.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of drawings]

[Fig. 1] Block diagram of garbage incinerator

FIG. 2 is a perspective view of a roster.

FIG. 3 is a perspective view of a stoker mechanism.

FIG. 4 is a block diagram of a garbage incinerator showing another embodiment.

FIG. 5 is a block diagram of a garbage incinerator showing another embodiment.

FIG. 6 is a vertical side view of an essential part of the pusher mechanism.

FIG. 7 is a plan view of an essential part showing another configuration of the pusher mechanism.

FIG. 8 is an explanatory view of the operation of the main part of the ash supply mechanism by a vertical cross section.

FIG. 9 is an explanatory view of the operation of the main part of the ash supply mechanism by a vertical cross section.

FIG. 10 is an explanatory view of the operation of the main part of the ash supply mechanism by a vertical cross section.

[Explanation of symbols]

 1 Heat Insulation Layer 4 Dust Layer 5 Stalker Mechanism 17 Pusher Main Body 17a Ash Storage Section 18 Pusher Lower Floor 19 Ash Supply Mechanism 30 Second Pusher Mechanism 32 Ash Return Transport Path

Claims (5)

[Claims] 1. A waste incinerator having a stoker mechanism (5) for burning and transporting dust while being incombustible between the stoker mechanism (5) and the dust layer (4). A refuse incinerator in which a heat insulating layer (1) made of the granular material or the powdery material is formed. 2. The heat insulating layer (1) is formed by ash from an ash return transport passage (32) arranged to supply ash recovered from the furnace. Garbage incinerator. 3. A refuse incinerator having a stoker mechanism (5) for burning waste while transporting the waste, the ash return transport path being arranged to supply ash recovered from the furnace ( 32) is provided, and the ash storage portion formed under the pusher main body (17) is provided in the pusher lower floor portion (18) for guiding the pusher main body (17) of the pusher mechanism (3) for injecting dust into the furnace. The ash return transport path (32) for supplying ash to (17a)
The ash receiving section (17a) receives ash from the ash return transport path (32) when the pusher body (17) is retracted, and the ash storage section (17a) receives the ash from the pusher body (17).
The refuse incinerator provided with an ash supply mechanism (19) configured to supply the received ash under the refuse to be charged as the received ash advances. 4. A waste incinerator comprising a pusher mechanism (3) for charging dust into the furnace and a stoker mechanism (5) for burning the charged dust while conveying it, A refuse incineration system provided with a second pusher mechanism (30) below the pusher mechanism (3) between the stoker mechanism (5) and the dust layer (4) for supplying non-combustible granular material or powdery material. Furnace. 5. A refuse incinerator in which a stalker mechanism (5) for incinerating waste while transporting it is continuously provided through a step (D), wherein the stoker is connected from the step (D). A waste incinerator having a second pusher mechanism (30) for supplying non-combustible granular material or powdery material between the mechanism (5) and the dust layer (4).