JP2995577B2 - Waste incineration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a waste incinerator, in-furnace abnormal combustion, rostral and combustion air nozzles having an opportunity to occur in a furnace when incinerating waste in the furnace. It is intended to provide a structure of a waste incinerator for preventing clogging of the waste and suitably incinerating the waste.

<Prior Art and its Problems> FIGS. 5 and 7 show the structure of a waste incinerator proposed and implemented by the inventor previously.

Conventionally, this type of incinerator is operated for 8 to 10 hours only during the daytime by injecting waste from the waste inlet 5 and incinerating it. Have left the company. However, a large amount of unburned matter is contained in the ash discharged the next morning due to the accumulation of unburned matter on the rostrum or the occurrence of a clogging phenomenon at the top of the deposited matter. Therefore, at this time, if unburned gas remains in the furnace, there is a risk of explosion in the furnace. Referring to FIGS. 9 and 10, the structure of the conventional apparatus before FIGS. 5 and 7 will be described. As the waste incinerator 1, a furnace having a circular cross section is usually employed, and the inner wall of the furnace is provided with an air supply pipe. The combustion air is formed from a plurality of nozzles 4 of an air supply pipe penetrating the inner wall surface of the water jacket 3, and the incineration material is introduced into the furnace from the supply port 5. Is done. At the bottom of the furnace, there is provided a roastle 6 formed by a water tube or the like, and the ash is taken out from an ash reservoir 7 thereunder by a scoot or the like. The combustion residue on the rostrum is taken out from the outlet 8.

Cooling water 9 is supplied to the water jacket 3 from a nozzle 10 and heat is received in the water jacket 3 to form a water / water mixture 12.
And sent out from the nozzle 11. Air to the air supply pipe 2 is supplied from pipes 13a and 13b.

Abnormal combustion in the furnace, which does not normally occur in a mold that injects waste or in a large-sized device, is experienced in this small incinerator due to stagnation of unburned gas due to bridging of the incinerated material. In that case, the incineration ash could be scattered, but measures must be taken to ensure safe driving. Examining the cause, it was found from the record of the handler that the time was due to the co-firing of a material such as paper with a vinyl-based material having a large calorific value and a large amount of incineration per unit time. The molten material of the vinyl material or the bag of the same material is semi-molten, and the unburned papers to be incinerated are adhered and held on the furnace wall. As a result, unburned gas accumulates between the lower burning incineration material and the material connected to the lid, and the state of incomplete combustion continues. It is estimated that the flammable gas ignites and burns abnormally.

Therefore, it has become necessary to provide a device having a structure in which this kind of combustible gas does not stay in the furnace.

For this reason, the inventor of the present invention has taken measures to solve this problem in Japanese Patent Application No. Hei.
I applied for No.78. The device according to the embodiment is the fifth device.
A water pipe parallel to the water wall inside the furnace as shown in Fig. 6
14 is provided to form a combustion gas vent passage 15 for preventing explosion in the furnace due to the accumulation of combustion gas in the vicinity of the lower roastle 6. As a result of operating the apparatus of the above-described drawing according to one embodiment of the present invention, combustion is favorably performed, and the number of clogged nozzles is about 1/8 of that of the conventional apparatus during inspection at the time of suspension of operation. There was no solidified lump and the ash color was white, indicating that the combustion was good.

However, on the other hand, when a synthetic resin sheet wound into a roll or a roll wound with a synthetic resin-coated paper is put into the furnace as an incinerator, the molten resin before burning is combined with the combustion ash and put in. When the rolls fall onto the ash pile, the compacted mass mixed with the ash and the molten resin causes clogging of the lower roster by the drop impact, and at the same time, is located at a level close to the level of the lower roster. This causes a problem that the nozzle of the water wall is clogged and the operation of the combustion device must be stopped. Therefore, it is important to prevent the roll from dropping directly onto the ash pile, and it has become necessary to propose a device for preventing this.

7 and 8 are cross-sectional views of a waste incinerator when the furnace described as the second embodiment of the patent application has a membrane wall structure.

<Object of the invention> The present invention provides a method of closing an upper part of a combustion fire even if an incinerated substance of a specified amount or more is accidentally charged into a furnace or a large bagged substance is charged. Provided is a structure of a waste incinerator that does not cause a risk of abnormal combustion and that does not clog a roster or a nozzle for supplying combustion air even when a heavy roll such as a sheet coated with a synthetic resin is inserted. The purpose is to:

<Summary of Means> In short, a waste incinerator provided with a plurality of vertically and parallel water pipes separated from the water wall forming a combustion gas exhaust passage in a furnace surrounded by a water wall having a plurality of combustion air nozzles In the space above the pile of waste to be incinerated in the furnace, two shelf risers are provided in the middle of a first shelf water pipe connected to a water wall that crosses substantially the center of the furnace and is opposed to the water wall. Are connected to each other at an interval to form a buffer upper shelf, and a second shelf water pipe is provided below and spaced apart from the first shelf water pipe and has a shorter length than the first shelf water pipe and is connected to the water wall from the water wall. And a water wall are connected by a riser for shelf to form a second shelf for buffering.

<Embodiment 1> Figs. 1 and 2 are cross-sectional views of a waste incinerator in which the apparatus of the present invention is provided in the apparatus of Figs. As shown in the drawing, a buffer upper shelf 18 is provided below the upper end of the water pipe 14 so as not to impair the function of the combustion gas vent passage by the water pipe 14 in the furnace.

As shown in the drawing, the upper shelf water buffer 18a, which is a constituent member of the buffer upper shelf 18, passes through substantially the center of the furnace and connects the wall surfaces of the water jacket to each other. Satisfactorily provided.

Further, the second shelf water pipe 18b is similarly provided substantially parallel to the first shelf water pipe 18a and has a lower horizontal level. The second shelf water pipe 18b is connected to the wall of the water jacket by a shelf rising pipe 18c so as to sufficiently withstand a drop impact of a heavy object such as a heavy roll, and facilitates the delivery of generated steam. The first shelf water pipe 18a can be held by a shelf riser pipe 18d as shown in FIG.

The hole diameter of the combustion air nozzle located at the level position near the level of the rooster 6 and the shelf water pipe is preferably large to prevent clogging of the synthetic resin melt and combustion ash.

<Embodiment 2> Figs. 3 and 4 are cross-sectional views of a device in which a furnace is surrounded by a membrane wall and a buffer upper shelf is provided.
The buffer upper shelf 18 includes a first shelf water pipe 18a, a second shelf water pipe 18b, and shelf risers 18c and 18d. In this case, these water tubes are connected at their ends to the water tubes forming the membrane wall to facilitate the delivery of steam generated in the tubes.

<Effect> When the heavy roll 19 such as a synthetic resin sheet is thrown in from the supply port 20, it collides with the buffer shelf 18 so that the impact force against the ash accumulation on the rostrum is weakened and directly falls on the ash accumulation. There is no opportunity for clogging of the rostre 6 and the combustion air nozzle.

Also, as shown in the figure, when the heavy roll 19 rides on the buffer upper shelf 18, the heavy roll can be burned on the shelf by receiving a supply of high-temperature combustion gas and sufficient combustion air from the combustion gas vent passage 15. In addition, the melt does not cause clogging of the roaster and the combustion air nozzle.

By practicing the present invention, the continuous operation time of the waste incinerator could be significantly extended. In addition, it was confirmed that the incineration ash was sufficiently burned in white color due to good combustion, and the quantity was extremely small.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of an apparatus according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line III-III of FIG. 1, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a longitudinal sectional view of the apparatus according to the example, and FIG.
FIG. 5 is a sectional view taken along line IV-IV of FIG. 5, FIG. 5 is a longitudinal sectional view of the waste incinerator proposed earlier by the inventor, FIG. 6 is a sectional view taken along line II of FIG. 5, and FIG. FIG. 8 is a sectional view taken along the line II-II of FIG. 7, FIG. 9 is a longitudinal sectional view of an apparatus showing problems of the conventional apparatus before the proposal, and FIG. FIG. 4 is a partial cross-sectional view showing a relationship between a kit and a combustion air supply nozzle. 1 Waste incinerator 3 Water jacket 6 Rostor 14 Water pipe 18 Buffer upper shelf 18a First shelf water pipe 18b Second shelf water pipe 18c, 18d Shelf Riser 19 roll

Continuation of the front page (72) Inventor Yasushi Arai 1-2-10 Isogo, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Bab Hitachi Engineering Services Co., Ltd. (56) References Japanese Utility Model Showa 52-69871 (JP, U) 1974-23756 (JP, B1) (58) Field surveyed (Int. Cl. ⁶ , DB name) F23G 5/00 F23G 5/44

Claims (1)

(57) [Claims] 1. A waste incineration apparatus provided with a plurality of vertical and parallel water pipes separated from a water wall forming a combustion gas exhaust passage in a furnace surrounded by a water wall having a plurality of combustion air nozzles. In the space above the top of the waste pile to be incinerated in the furnace, two shelf risers are provided in the middle of the first shelf water pipe which crosses substantially the center of the furnace and is connected to the water wall facing the water wall. Connected to the upper shelf for buffering, and spaced apart below this
A second shelf water pipe which is shorter in length than the shelf water pipe and is connected to the water wall from the water wall is provided, and the center of the second shelf water pipe and the water wall are connected by a riser for shelf to form a lower part of the buffer for the buffer. A waste incinerator characterized by forming a shelf.