JPH102536A - Incinerating furnace stoker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the production of clinker as well as the burnout of refractories of a fire grating by a method wherein a stepped body is provided between an integrated drying and combustion type stoker and a post-combustion stoker. SOLUTION: Waste is supplied to the drying stoker unit 5 of an integrated drying and combustion type stoker 2 and is dried. Then, the waste is burnt on the combustion stoker unit 6 after being reversed sand stirred by a stepped unit 7. The waste from the integrated drying and combustion type stoker 2 is supplied to a stepped body 4, reversed stirred, and burned on a post- combustion stoker 3 through surface combustion. The integrated drying and combustion type stoker 2 supplies comparatively thin layers of garbage into the drying stoker unit 5 when the garbage is provided with a low calorific power. On the other hand, when the quality of the garbage is provided with comparatively high calorific power, comparatively thick layers of garbage are supplied into the drying stoker unit 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refuse incinerator stoker.

[0002]

2. Description of the Related Art Conventionally, this type of refuse incinerator stoker includes a dry stoker for drying refuse, a combustion stoker for burning refuse, a post-combustion stoker for burning refuse, and a dry stoker and a combustion stoker. There is known a structure comprising an upper step body provided therebetween and a lower step body provided between a combustion stoker and a post-combustion stoker (see Japanese Patent Publication No. 5-85809, etc.). . Each stalker is independent and is driven by a separate drive means. As the grate structure of each stoker, a sliding type (see Japanese Utility Model Laid-Open No. 6-84143 and the like) and a swing type (see Japanese Utility Model Publication No. 2-123535 and the like) are known. The sliding type is composed of a movable grate and a fixed grate alternately arranged in a horizontal row from the upper stage to the lower stage, and the movable grate slides back and forth with respect to the moving direction of the refuse. From the upper stage to the lower stage. The oscillating type is composed of movable grate and fixed grate alternately arranged vertically one by one from the upper stage to the lower stage, and the movable grate slides back and forth in the moving direction of the refuse. The bed is swung up and down to increase the efficiency of combustion by increasing the agitation of dust and the introduction of air. In general, the oscillating type is better for low-calorie waste, while the sliding type or oscillating type with less swing is better for high-calorie waste. Since the calories of the garbage fluctuate due to seasonal fluctuations, the grate structure most suited to the circumstances of the establishment is selected.
The upper and lower steps are made of refractory materials such as refractory bricks and irregular refractories, and have a height of 400 to 800 m because of the necessity of forming a working space for assembling and maintaining the stoker.
m.

[0003]

However, in the case of such low-calorie refuse, it is preferable that the head is large. The air reaches the details and causes extremely intense combustion in this part, resulting in clinker in the stepped body or intense flame licking the refractory material constituting the stepped body and burning it out In some cases, the grate at the end of the previous stoker was burned. This was particularly noticeable in the upper step body between the drying stoker and the burning stoker. The present invention, in view of the above problems,
The purpose of the present invention is to provide a garbage incinerator stoker which prevents generation of clinker and burnout of a refractory material and a grate.

[0004]

A refuse incinerator stoker according to the present invention basically comprises a drying stoker section for drying refuse, a combustion stoker section for burning refuse, and a step formed between them. Drying and burning integrated stoker with
The present invention is characterized in that it is composed of a post-combustion stoker for garbage burning, and a step body provided between the drying / combustion integrated stoker and the post-combustion stoker.

[0005] The refuse is supplied to the drying stoker portion of the integrated drying / burning stoker, and is dried by this.
After being inverted and stirred by the step portion, it is burned by the combustion stoker portion. The refuse from the drying / combustion integrated stoker is supplied to the step body and is inverted and agitated by the stoker, while being burnt by the post-combustion stoker. A drying / storage unit having a drying stoker unit for drying refuse, a combustion stoker unit for burning refuse, and a step formed between them.
Since the stoker with integrated combustion is provided, it can be manufactured at the factory in advance, and the height of the step formed between the drying stoker and the combustion stoker can be made smaller than that of the conventional step. it can.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an outline of a refuse incinerator stoker of the present invention.

The main part of the refuse incinerator stoker 1 is composed of an integrated drying / burning stoker 2, a post-burning stoker 3, and a step body 4.

The integrated drying / burning type stoker 2 includes a drying stoker section 5 for drying refuse, a combustion stoker section 6 for burning refuse, and a step 7 formed therebetween. The grate structure of the drying stoker portion 5 and the combustion stoker portion 6 is made of a sliding type or a swinging type, and is not shown, but includes a fixed grate and a movable grate movable in the front-rear direction with respect to the fixed grate. It has. The movable grate of the drying stoker section 5 and the combustion stoker section 6 is driven in the front-rear direction by a driving device 10 having a driving shaft 8 and a driving rod 9. The drying stoker section 5 and the combustion stoker section 6 are configured such that air is supplied from a lower portion through a first air duct 11 and a second air duct 12, respectively. Each air is used for cooling each of the stoker portions 5 and 6, and is transferred to the refuse via a grate to be air for drying and combustion. The height h of the step 7 is 100 to 300 m.
m, most preferably 150 mm. Here, when the height is less than 100 mm, the effect of inverting and stirring the dust cannot be expected much. If the height exceeds 300mm,
Due to the large inversion and agitation, the combustion air reaches the details and extremely vigorous combustion tends to occur in this portion.

The post-combustion stoker 3 is used for depositing and burning refuse, and has an independent structure as in the prior art. The grate structure of the post-burning stoker 3 is of a sliding type or swinging type in accordance with the drying / burning integrated stoker 2 and is not shown. A movable grate that is movable. The movable grate of the post-burning stoker 3 is driven in the front-rear direction by a driving device 15 having a driving shaft 13 and a driving rod 14. The post-combustion stoker 3 is connected to the air duct 16 from below.
The air is supplied according to. This air is
The air is used for cooling the post-combustion stoker 3 and is transferred to the refuse via a grate and becomes air for combustion.

The step body 4 is a drying / burning integrated stoker 2
And between the post-combustion stoker 3 and there is no occurrence of clinker or burnout accident.
It is made of a refractory material such as a refractory brick or an irregular refractory, and has a height H of about 400 to 800 mm because it is necessary to form a working space for assembling and maintaining the stoker.

Next, the operation will be described based on such a configuration. The refuse is supplied to the drying stoker unit 5 of the integrated drying / burning stoker 2 and is dried by this.
After being inverted and agitated by the step section 7, the combustion stoker section 6
It is burned by. The refuse from the drying / combustion integrated stoker 2 is supplied to the step body 4 where it is inverted and stirred, and is burned by the post-combustion stoker 3.

Thus, the drying / burning integrated stoker 2 is
The following actions are performed. For low-calorie waste,
The raw garbage is supplied to the drying stoker section 5 with a relatively thin layer of garbage. The water is evaporated and dried while moving downstream on the drying stoker section 5, and the drying stoker section 5 is transferred to the combustion stoker section 6. When the gas reaches the vicinity, gasification combustion is started while generating reducing gas. Just at this time the step 7
, Where cracks and inversion occur in the refuse layer to improve the inflow contact of the combustion air from below the grate, thereby facilitating flame combustion on the combustion stoker section 6 thereafter.

On the other hand, with respect to the relatively high calorie waste quality, it is better to supply the garbage to the drying stoker section 5 with a relatively thick layer of garbage, and reach the step section 7 through the drying process. Occasionally, a relatively slow cracking and reversal is caused by the thick dust layer and the stepped portion 7 to agitate the necessary dust and inflow of air. Thus, the fuel can be transferred on the combustion stoker portion 6 without any trouble, and stable and good combustion can be performed. As a result, no clinker, which has conventionally occurred in a large step body, does not occur, and the fireproof material constituting the step body and the grate at the end of the dry stoker do not burn out.

Therefore, the drying and burning integrated stoker 2 is
It can correspond to a wide range of waste heat generation depending on waste quality.

[0015]

As described above, according to the present invention, as described above,
The following excellent effects can be obtained. (1) Drying / burning integrated stoker, post-burning stoker,
A low-calorie integrated dry / burning stoker, which is composed of a step body and has a drying stoker section for drying refuse, a combustion stoker section for burning refuse, and a step section formed therebetween, is provided. Regardless of the quality of the waste and high calorie, in the process from drying to gasification combustion to flame combustion, the waste layer can be appropriately inverted and agitated, and the combustion efficiency of the waste can be increased. In addition, it is possible to prevent generation of clinker and burning of refractory material and grate. (2) An integrated drying / combustion stoker including a drying stoker section for drying the refuse, a combustion stoker section for burning the refuse, and a step formed between them is provided. Can be lower. Therefore, the height of the incinerator can be reduced, and the cost of the building as well as the incinerator can be reduced. (3) An integrated drying / combustion stoker equipped with a drying stoker unit for drying refuse, a combustion stoker unit for burning refuse, and a step formed between them is provided. There is no need to provide a work space that was needed. (4) An integrated drying / combustion stoker including a drying stoker section for drying refuse, a combustion stoker section for burning refuse, and a step formed between them is provided. And the cost of the drive device can be reduced accordingly.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the outline of a refuse incinerator stoker of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Garbage incinerator stoker, 2 ... Drying and burning integrated stoker, 3 ... Post-burning stoker, 4 ... Stepped body, 5 ... Dry stoker part, 6 ... Combustion stoker part, 7 ... Stepped part, 8, 13 ... Drive shaft , 9, 14 ... drive rod, 10, 15 ... drive device, 11 ... first air duct, 12 ... second air duct,
16 ... air duct, h, H ... height.

Claims (2)

[Claims] An integrated stoker comprising a drying stoker section for drying refuse, a combustion stoker section for burning refuse, and a step formed between the stoker section and a post-combustion stoker for depositing and burning refuse. And a step body provided between the drying / burning integrated stoker and the post-burning stoker,
A garbage incinerator stoker characterized by being composed of: 2. The refuse incinerator stoker according to claim 1, wherein the height of the step portion of the integrated drying / burning stoker is set to 100 to 300 mm.