JPS6016209A - Incinerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a '4Lv1. The present invention relates to an incinerator in which a hearth portion is formed by a grate.

According to an incinerator in which the number of grate forming the hearth portion has a step difference, there are nine advantages due to the step difference.

(1) Each zone of drying, combustion, and after-combustion is easy to clarify and operation monitoring is easy.

(2) Operation control can be performed mainly by controlling the operation of the grate stage, and it is easier to control disturbances in the fuel above the hearth than in the case of a single hearth.

(3) For water-containing fuel with a low calorific value, the ignition and combustibility is improved due to the reversal and crushing effect of the fuel due to the furnace firing step.

However, while it has these advantages, it also has the following disadvantages.

(1) In the case of fuel with a high calorific value, the temperature of the hearth and hearth wall of the furnace where it burns suddenly increases at the point where the fuel falls from the drying grate to the combustion grate, in order to improve the ignition and combustibility of the fuel. or the fuel on the dry grate will receive a flame width of 1 year and begin to partially burn. For this reason, in addition to causing a reduction in the life of the front part of the combustion grate, when trying to maintain the fuel on the dry grate in a reducing atmosphere in order to reduce NOx, partial combustion of the fuel on the dry grate may occur. Since NOx cannot be suppressed, a reducing atmosphere cannot be maintained and suppressed combustion of NOx is difficult.

(2) Due to changes in the properties of the fuel, such as moisture content and lower heat generation pieces, the combustion zone may shift backwards and straddle the combustion grate and post-combustion grate. Since the flame radiation above the post-combustion grate is blocked and the fuel being combusted is separated by the steps, combustion on the post-combustion grate is difficult to connect. For this reason, it is difficult to stably burn the fuel in the post-combustion grate, so the post-combustion grate may not be fully utilized for fuel combustion.

(3) Because the amount of fuel falling from one grate to the other is not constant, it is difficult to make the layer thickness of fuel on each grate uniform and to stably carry out reactions such as combustion in the hearth. .

The above-mentioned disadvantages are unique to incinerators in which the multiple grate forming the hearth have steps, and are not observed in incinerators with a single hearth without steps in the hearth. It is. In this way, depending on the properties of the fuel, such as its moisture content and low heat generation, it may be desirable to have a step in the hearth, or it may be desirable not to have it.When the properties of the fuel are constant The presence or absence of a step in the hearth can be determined at the planning stage depending on the properties of the fuel, but for fuels whose properties are not constant and vary widely, such as garbage, the step in the hearth can be determined. It is very difficult to decide whether or not to use one or the other, and even if one is decided upon after thorough consideration, it is often determined that the opposite choice should have been made, depending on changes in the properties of the fuel. be.

The present invention aims to solve such problems in an incinerator in which a hearth portion is formed by a plurality of stepped grate, in which the grate is connected to the horizontal axis of the fuel discharge side end. This purpose is achieved by providing an incinerator with a structure that allows the height difference in the hearth to be adjusted by swinging the furnace. It is possible to perform stable combustion operation even when the incinerator is in use, and to perform combustion using the hearth area effectively, thereby increasing the life of the incinerator and reducing NO in the exhaust gas.
This makes it possible to reduce x.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be explained in detail below based on the drawings showing one embodiment thereof.

The drawing shows a waste incinerator. In the figure, (1) is a garbage supply hopper, (2) is a hearth part that burns the garbage (3) supplied from the garbage supply hopper (1), and has a plurality of stepped grates (4). (5) It is formed by (6). The grate (4), (5), and (6) are, in order from the top, a drying grate (4), a combustion grate (5), and a post-combustion grate (6), of which the drying grate (4) is fixed. A combustion grate (5) and a post-combustion grate (6) are provided.
are each swingably provided via a horizontal shaft (7) at the end on the waste (fuel) discharge side. (8) is the combustion grate (
5) and a grate rotation device provided below the post-combustion grate (6), and a drive motor (9) provided outside the furnace and a worm A (10) interlocked with the worm 01. Wormwheel 0 manga is placed at the end,
A rotating shaft @ provided along the width direction of the furnace, and an arm holder integrally provided at an appropriate location inside the furnace near the rotating shaft a.
The end of the arm 03 is connected to the lower surface of the combustion grate (5) or the lower surface of the post-combustion grate (6) through a pin joint, and the rod (14) connects these. (5) and the after-combustion grate (6). OQ is the combustion grate (5
) and the guide member provided opposite the end faces of the after-combustion grate (6) on the waste supply side to keep the end faces of the combustion grate (5) and the after-combustion grate (6) in good condition when they rotate. It functions to guide you.

The operation of this configuration will be explained next. First, when normal garbage (3) is being supplied from the garbage supply hopper (1), a conventional combustion operation is performed while maintaining the level difference of each grate (4), (5), and (e). And high calorific value garbage (3)
etc., the grate rotation device (8) is operated to rotate the combustion grate (5) or the post-combustion grate (6).
) upwards moderately, and each grate (4) (5)
(6) Narrow or eliminate the step. In this case, when the drive motor (9) is rotated, the worm Ql
rotates, and as the worm α1 rotates, the worm wheel/l'OLl rotates. And warm wheel)v
The rotation of Qυ rotates the rotation axis 0, and the arm 04 rotates to push up the rod 041. It should be noted that the combustion grate (5) shown in the figure is shown in the lowest position, and the post-combustion grate (6) is shown in the highest position. Therefore, if both the combustion grate (5) and the post-combustion grate (6) are placed at the highest position,
This will serve as a single-combustion furnace. This makes it possible to stably burn the supplied high calorific value waste (3). In other words, it is possible to prevent the high calorific value garbage (3) from falling at the stepped portion and being suddenly burned.

As described above, according to the present invention, stable combustion operation can be performed even in the face of large fluctuations in the properties of the fuel, and combustion can be performed while effectively utilizing the hearth area.
It is possible to increase the life of the incinerator and reduce NOx in the exhaust gas.

[Brief explanation of the drawing]

The drawing is a vertical sectional side view of a garbage incinerator showing an embodiment of the present invention. (2)...Heart part, (4)...Drying grate, (5)
... Combustion grate, (6) ... Post-combustion grate, (7)
...Horizontal Axis Agent Yoshihiro Morimoto Procedural Amendment (Voluntary) August 1981, tl1 Mr. Commissioner of the Japan Patent Office2, Name of the invention Incinerator3, Person making the amendment Relationship to the case Name of the patent applicant ( 511) Hitachi Zosen Corporation 4, Agent Number of inventions increased by amendment Next, as a means for fixing the position of the combustion grate (5) and the post-combustion grate (6) after swinging, for example, the torsion angle of the form wheel qυ should be made small enough to allow Yarf lock, and the double An electromagnetic brake may be provided on the drive moke (9) as a rotor mechanism.1
However, the grate rotation device (8) is not limited to the one in this embodiment.
It is also possible to use a configuration in which the grates (5) and (6) are directly pushed up from below using a hydraulic cylinder. ” is added.

Claims (1)

[Claims] 1. In an incinerator in which a hearth portion is formed by a plurality of grate having steps, the grate is provided swingably through a horizontal axis at the end on the burnt discharge side to eliminate the step in the hearth portion. An incinerator characterized by making it possible to adjust.