JPH0212436Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a grate in an incinerator.

[Prior art]

Normally, the combustion of garbage, etc. consists of the processes of drying, combustion, and post-combustion, and in the post-combustion, it is desired that complete ashing be performed in the end so that no unburned matter remains.

Conventionally, as shown in Fig. 1, there has been an incinerator in which an inclined fixed grate 3 is disposed in the after-combustion section 1 of the incinerator following the combustion stoker 2 in the previous stage to completely burn unburned materials. A pusher 4 is provided at the bottom to discharge the ash. However, as the ash is discharged by the pusher 4, the unburned content on the fixed grate 3 slides down along its slope along with the ash.
Alternatively, unburned matter often fell from gaps between the fixed grate 3 for supplying combustion air A from below.

In addition, as shown in Figure 2, there is also a rotating grate 5 that is rotatable around one end and rotated from time to time to cause the ash to fall, but this also supplies combustion air A from below. It was not possible to avoid unburned matter from falling through the cracks.

Furthermore, as shown in Fig. 3, there is a system in which a rotating roller 6 is provided at the inlet of the after-burning section 1, and the rotation of the rotating roller transfers the ash containing unburned matter above it, and It is used to adjust the thickness of the garbage layer on the combustion stoker 2, and does not contribute to combustion in any way.

As described above, the conventional fire grate was unable to perform combustion without leaving any unburned substances, and the purpose of after-combustion could not be completely achieved.

[Purpose of the invention] The purpose of the invention is to provide a grate for an incinerator that can completely burn unburned matter without leaving it behind.

[Structure of the idea]

In the present invention, a hollow swing beam having an air outlet above and swinging up and down is arranged in communication with the blast pipe, a first grate piece is fixed to close the gap between these swing beams, and A second grate piece is provided that covers the swing beam and reaches near the top surface of the first grate piece, and air from the blast pipe is directed from the air outlet of the swing beam through the inside of the second grate piece. It is characterized in that it is guided to the upper surface of the first grate piece.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. In the fourth to sixth illustrated examples, a blower pipe 9 is connected to the blower duct 7 via a rotary joint 8 and extends into the after-combustion section 1. A swing beam 11 that is hollow and has an air outlet 10 at the top is fixed in communication with the swing beam 11, and the swing beam 11 is swung up and down together with the blast pipe 9 by an arm 13 connected to a cylinder 12 provided outside the furnace. It is becoming more and more common.

A first grate piece 14 is fixed between each swing beam 11 so as to close the gap between the swing beams 11, and further covers each swing beam 11 so that the side ends reach near the top surface of the first grate piece 14. Assemble the second grate piece 15 into the swing beam 1
1, and the combustion air A blown from the blast pipe 9 is passed through the swing beam 11, the air outlet 10, and the inside of the second grate 15 to the first grate piece 1.
It is designed to lead to the top surface of 4.

In the figure, reference numeral 16 indicates an attachment leg to the swing beam 11 provided on the second grate piece 15.

The ash containing the unburned matter to be incinerated is then transferred from the combustion stoker 2 onto the grate constituted by the first grate piece 15 and the second grate piece 16, where it is further subjected to post-combustion. . This grate is arranged without gaps so that there are no falling objects, but the combustion air A flows through the air duct 7, the air pipe 9, the swing beam 11, its air outlet 10, and the inside of the second grate piece 15. After that, the ash is ejected from the vicinity of the upper surface of the first grate piece 14, and is evenly distributed over the ash layer containing unburned matter transferred and deposited thereon, and all the unburned matter is retained on the grate for post-combustion. It will be done. Then, by driving the cylinder 12 as appropriate to swing the swing beam 11 up and down to cause the ash to fall from the tip of the grate, the thickness of the ash layer on the grate is maintained at an appropriate level, and after-burning is effectively achieved. Close.

Note that the swing angle of the swing beam 11 is
If the range is about 45 degrees downward from the almost horizontal position,
This is preferable because it is easy to prevent the unburned components from sliding and falling, and it is even more effective if the vicinity of the tip of the swing beam 11 is bent upward as shown in the illustrated example.

Although the above embodiment shows an example in which the grate of the present invention is installed in the after-combustion section of an incinerator, it is of course possible to install it at the rear end of the drying section, the rear end of the combustion section, or other locations.

[Effect of idea]

As described above, according to the present invention, unburned substances, etc. do not fall from between the grate, combustion air is uniformly supplied along the grate surface, and the swing of the grate prevents the ash from falling. Since the layer thickness is also adjusted, combustion can be carried out completely on the grate, which is a very useful effect.

[Brief explanation of the drawing]

1 to 3 are vertical cross-sectional views of the vicinity of the post-combustion part of an incinerator showing a conventional example, FIG. 4 is a vertical cross-sectional view showing an embodiment of the present invention, and FIG. A line sectional view, and FIG. 6 is a sectional view of the furnace body of the present invention installed. 1... After-combustion section, 2... Combustion stoker, 3...
Inclined fixed grate, 4... pusher, 5... rotating grate, 6... rotating roller, 7... ventilation duct, 9
... Blow pipe, 10 ... Air outlet, 11 ... Swing beam, 12 ... Cylinder, 13 ... Arm, 14 ... First grate piece, 15 ... Second grate piece.

Claims (1)

[Claims for Utility Model Registration] 1. A hollow swing beam having an air outlet above and swinging up and down is arranged in communication with the air pipe, and a first grate piece is installed to close the gap between these swing beams. and further provide a second grate piece that covers the swing beam and reaches near the top surface of the first grate piece, and directs air from the blast pipe to the second grate from the air outlet of the swing beam. A grate characterized in that the grate is led to the upper surface of the first grate piece through the inside of the piece. 2. The grate according to claim 1, wherein the swing angle of the swing beam is within a range of about 45 degrees downward from a substantially horizontal position. 3. The grate according to claim 1 or 2, wherein the swing beam is bent upward near its tip.