JPH0216121Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Field of industrial application] The present invention is a method for incinerators that incinerate solid fuel such as coal or industrial waste or municipal garbage that can be used as fuel. It is about improvement.

[Conventional technology]

When solid fuel such as coal or industrial waste or municipal garbage that can be used as fuel is incinerated on the top surface of a grate in an incinerator, the top surface of the grate is covered with dirt, glass, metal, etc. mixed in the garbage. So-called clinker, which is formed by melting and condensing of non-combustible materials, grows and accumulates, inhibiting the combustion of garbage.

Therefore, Japanese Utility Model Publication No. 57-23779 as a prior art proposes a movable grate to be inserted vertically between a number of fixed grates arranged horizontally at the bottom of the incinerator. It is proposed that by moving up and down so as to protrude from the top of the fixed grate, the lower layer of the incinerated material will be stirred and the ash will fall, and the clinker will be prevented from growing large on the grate. .

(Problem to be solved by the invention) However, since the grate in this prior art is flat and the ratio of the grate area to the cross-sectional area of the incinerator is small, the incineration capacity is low. In this system, the growth of clinker on the grate is prevented by using a movable grate, but since the spacing between the fixed grate remains unchanged, the clinker that once grows into a large lump on the upper surface of the grate, This is because the clinker cannot be removed from the top of the grate during incineration, and in order to remove it, the incineration must be interrupted and the clinker must be forcibly pulled out from the top of the grate using another mechanism. In addition to requiring a great deal of effort to remove this clinker, the incineration capacity was considerably reduced due to the interruption of incineration.

This invention aims to increase the incineration capacity by increasing the ratio of the area of the grate to the cross-sectional area of the incinerator when incinerating industrial waste or urban garbage, and also aims to increase the incineration capacity by increasing the ratio of the area of the grate to the cross-sectional area of the incinerator. The aim is to be able to remove this large clinker without interrupting the incineration process.

[Means for solving problems]

Therefore, in the present invention, the grate provided in the incinerator is formed in the shape of an inverted pyramidal hopper, and the outlet is opened at the center of the bottom of the hopper-shaped grate.
A rotary impeller is provided within the discharge port so as to protrude into the hopper-shaped grate.

[Functions and effects of the idea]

The incineration materials put into the incinerator are deposited on the top surface of the grate at the bottom of the incinerator and burned.In this case, by forming the grate in the shape of an inverted pyramidal hopper as described above, Since the area of the grate becomes wider, the ratio of the grate area to the cross-sectional area of the incinerator increases.

On the other hand, the incinerated material in the hopper-shaped grate gradually descends as the volume decreases due to combustion, and the ash after combustion falls from the outlet in the grate and the gaps between the bars. By providing a rotary impeller so as to protrude into the hopper-shaped grate, clogging at the discharge port and bridging phenomenon occurring within the hopper-shaped grate can be prevented by the rotation of the impeller; During the combustion of the incinerated material, the clinker, which is formed by melting and condensing incombustible materials such as earth, sand, glass, and metals in the incinerated material and has grown into large lumps, can be discharged while being crushed by the rotation of the impeller.

In other words, the gap between each blade of the impeller and the grate becomes wider or narrower as the impeller rotates because the grate is formed into an inverted pyramid shape. , in the gap between each blade of the impeller and the grate, when the gap widens, it falls and gets caught, and when the gap narrows as the impeller rotates, it falls against the grate. By being pressed and crushed, it passes between the blades of the impeller and falls from the outlet.

Therefore, according to the present invention, the clinker generated during incineration can be removed one by one during incineration, so it is possible to omit the trouble of interrupting combustion and removing clinker as in the conventional method. In addition to the fact that there is no reduction in incineration capacity due to interruption of combustion for
Since the ratio of the grate area to the cross-sectional area of the incinerator can be increased, the incineration capacity can be significantly improved.In other words, when the incinerator capacity is the same, the incinerator can be made smaller.

〔Example〕

Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. In the drawing, 1 indicates an incinerator, 2 indicates a grate provided in the incinerator 1, and air is supplied to the incinerator 1 below the grate 2. A mouth 3 and an ignition port 4 with an opening/closing lid are provided, and an ash discharge port 5 is provided in the bottom plate 1a of the incinerator 1.

As shown in FIG. 2, the grate 2 is formed into an inverted quadrangular pyramidal hopper shape with a plurality of horizontal bars 2a and a plurality of vertical bars 2b, and a discharge port 2c is opened at the center of the bottom. are doing.

Reference numeral 6 indicates an impeller formed by combining two triangular blade plates 6a in a cross shape in a plan view, as shown in FIG. It is attached to the upper end of an upright vertical shaft 9, inserted into the hopper-shaped grate 2 from its outlet 2c, and rotated by the electric motor 7 at an appropriate speed.

Further, an arm 10 extending horizontally under the impeller 6 is fixed to the vertical shaft 9, and an ash scraping plate 11 whose lower end approaches the upper surface of the bottom plate 1a of the incinerator 1 is attached to the lower surface of the arm 10. will be established.

The incineration materials put into the incinerator 1 are deposited in the hopper-shaped grate 2, and are combusted by being supplied with combustion air from the combustion air supply port 3, and the volume is reduced due to this combustion. As a result, the ash gradually descends inside the hopper-shaped grate 2, and the ash after combustion falls onto the upper surface of the bottom plate 1a from the gap between the horizontal bars 2a and vertical bars 2b in the grate 2, and the discharge port 2c. A rotary impeller 6 is provided in the discharge port 2c so as to protrude into the hopper-shaped grate 2, thereby preventing clogging in the discharge port 2c and bridging phenomenon occurring within the hopper-shaped grate 2. This can be prevented by rotating the impeller 6.

During the combustion of this incinerated material, the earth and sand in the incinerated material,
When noncombustible materials such as glass and metals melt and condense, they grow into large chunks of clinker. Because it is formed into an inverted pyramidal hopper shape, it becomes wider and narrower as the impeller 6 rotates. When the gap between the inner surface of the grate and the grate becomes wide, it falls into the gap and gets caught as shown in FIG. 4, and then as the impeller 6 rotates as shown in FIG. By being pressed against the grate 2 and crushed when it becomes narrow, each blade 6a of the impeller 6 is
It passes through the gap and falls from the discharge port 2c onto the upper surface of the bottom plate 1a.

In addition, the ash and clinker that have fallen onto the top surface of the bottom plate 1a are removed by an ash scraping plate 1 provided on the bottom surface of the arm 10.
1, the ash is sequentially transferred toward the ash discharge port 5 and then discharged from the ash discharge port 5.

In addition, although the above embodiment shows the case where the hopper-shaped grate is square pyramid-shaped, the hopper-shaped grate in the present invention is not limited to the square pyramid shape, but can be formed into various shapes such as triangular pyramid shape or hexagonal pyramid shape. Needless to say, it may be made into a pyramid shape.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view, FIG. 2 is a perspective view of a hopper-shaped grate, and FIG.
The figure is a perspective view of the impeller, and FIGS. 4 and 5 are diagrams showing the operating state. 1... Incinerator, 2... Grate, 2c... Discharge port, 3... Combustion air supply pipe, 4... Ignition port, 5
... Ash discharge port, 6 ... Impeller, 6a ... Vane plate,
7...Electric motor, 9...Vertical axis.

Claims (1)

[Scope of utility model registration request] The grate provided in the incinerator is formed in the shape of an inverted pyramidal hopper, and an outlet is opened at the center of the bottom of the hopper-shaped grate, and a rotary impeller is installed in the outlet. A grate device for an incinerator, characterized in that it is provided so as to protrude into a grate.