JPH03236508A - Waste incinerator - Google Patents

Abstract

PURPOSE:To burn combustible matters completely and make the exhaust gas smokeless and odorless by constituting the inside of the main body of a primary combustion chamber in which wastes are charged for primary combustion and a secondary combustion chamber into which the generated exhaust gas is sent. CONSTITUTION:In order to incinerate wastes, they are charged into a primary combustion chamber 3 and a primary combustion burner 15 which is positioned in the primary combustion chamber 3 is ignited. The high temperature exhaust gas that is generated from the primary combustion chamber 3 is not sent directly to a stack 6 but stays in the furnace for a long time and sent to a secondary combustion chamber 4 to be completely burned. And in the secondary combustion chamber 4 the exhaust gas is heated by the flame from a secondary combustion burner 16 to further higher temperature. On the other hand in the main body 1 of the incinerator the primary combustion chamber 3 and secondary combustion chamber 4 are both constituted with a heat resistance caster 7 of a large heat accumulation effect and the combustion air is heated through air pipes 18 which are buried in the caster 7 and the heated air is blown out into the primary combustion chamber 3 and secondary combustion chamber 4, and the primary combustion chamber 3 and secondary combustion chamber 4 both have a very good combustion efficiency.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a waste incinerator, and more particularly, to a waste incinerator that makes exhaust gas smokeless and odorless, and also reduces the amount of harmful substances in the incinerated ash. Regarding waste incinerators that can be used.

[Conventional technology]

In recent years, with the development of chemical technology, many products using rubber and plastics have appeared on the market, but there are machines that mix these rubbers and plastics into what is called waste. many.

In addition, in the field of medical waste disposal, used disposable diapers, hypodermic needles, 9 drip bottles, etc. are incinerated. Processing is very important.

[Problem to be solved by the invention]

Among the above-mentioned wastes, rubber and plastics are burned in conventional general waste incinerators, in other words, the waste is put into the incinerator itself, and the exhaust gas generated in the incinerator is released from the chimney into the atmosphere. If incineration is done in an incinerator with a simple internal design that only releases waste into the atmosphere, the exhaust gas will contain a large amount of soot and toxic gases, which is undesirable in terms of pollution prevention. In other words, waste incinerators that have been put into practical use are generally
Since the residence time of the exhaust gas inside the furnace is short, there is a drawback that the combustion material is discharged outside the furnace together with the exhaust gas in a state of incomplete combustion.

In addition, in the medical waste treatment field, as mentioned above, used disposable diapers, hypodermic needles, and drip bottles are incinerated; There were also complaints that the incinerators used were not producing enough combustion and emitted a foul odor.

The purpose of the present invention is to collect not only general garbage waste, but also used rubber and plastic, medical waste such as paper diapers, syringe needles and drip bottles, and other industrial waste that is generally considered to be difficult to burn. Even when incinerated,
To provide a waste incinerator capable of completely burning combustion materials to make exhaust gas smokeless and odorless, and furthermore, reducing the amount of harmful substances in incineration ash to a trace amount.

[Means to solve the problem]

The purpose is to burn the waste put into the incinerator body and to release the waste gas generated in the incinerator into the atmosphere from the chimney. It is composed of a primary combustion chamber that is fed into the combustion chamber for primary combustion, and a secondary combustion chamber that sends the exhaust gas generated in the primary combustion chamber, and the primary combustion chamber and the secondary combustion chamber are constructed of heat-resistant casters. At the same time, in addition to the primary combustion burner facing into the primary combustion chamber, a secondary combustion burner is also installed in the secondary combustion chamber, and a blower is installed in the heat-resistant casters that constitute the primary combustion chamber and the secondary combustion chamber. This is done by forming an air passage that sends combustion air from the combustion chamber into the primary combustion chamber and the secondary combustion chamber.

[Effect]

In the above configuration, in order to incinerate the waste, the waste is put into the primary combustion chamber, and the
The next combustion burner is ignited.

The high-temperature exhaust gas from the primary combustion chamber generated as described above is not sent directly to the chimney in a short time, but stays in the furnace for a long time and is completely combusted in the secondary combustion chamber. In this secondary combustion chamber, it is further heated to a high temperature by the flame from the secondary combustion burner. On the other hand, in the incinerator main body, both the primary combustion chamber and the secondary combustion chamber are constructed of heat-resistant casters that have a large heat storage effect, and the blower is connected to the incinerator through an air path formed in the heat-resistant casters that have a large heat storage effect. of combustion air is heated to 1
Since the air is ejected into the secondary combustion chamber and the primary combustion chamber, the combustion efficiency in both the primary combustion chamber and the secondary combustion chamber is very good.The incinerator of the present invention, in which the above-mentioned effects act mutually, was manufactured as a prototype. The results of the incineration ash elution test when the paper diapers were incinerated and the analysis results of the airflow released into the atmosphere from the chimney were good as shown in the tables (and 2) below.

〔Example〕

The present invention will be explained below based on one embodiment of the drawings. Fig. 1 is a partially longitudinal front view showing the internal structure of the incinerator of the present invention, and Fig. 2 is a chimney shown by the reference numeral 6 in Fig. 1. FIG. 3 is a partially cutaway front view showing the overall configuration of FIG. 1, and FIG.
FIG. 4 is a sectional view taken along line BB in FIG. 3.

In Figs. 1, 3, and 4 showing the internal structure of the incinerator of the present invention, 1 is the incinerator main body, 2 is the base of the incinerator main body l, and 3 is the waste that is charged for primary combustion. A primary combustion chamber, 4 is a secondary combustion chamber into which the exhaust gas generated in the primary combustion chamber 3 is sent, 5 is a flue that continues to the secondary combustion chamber 4, and 6 is a chimney extending above the flue 5. The primary combustion chamber 3 and the secondary combustion chamber 4 are constructed of heat-resistant casters 7 that have a large heat storage effect. 8 is an incinerator main body casing made of steel plate.

Reference numeral 9 denotes a rosdol installed in the primary combustion chamber 3, 10 a waste inlet also provided in the primary combustion chamber 3, and 1 a side wall of the primary combustion chamber 3 located above the rosdol 9. 12 is an incinerated ash outlet located below the rosdol 9 and provided on the side wall of the primary combustion chamber 3; 13 is an incinerated ash outlet provided on the lower side wall of the secondary combustion chamber 4. The outlet 14 is an incinerated ash outlet provided on the lower side wall of the flue 5, and a damper (not shown) for adjusting the exhaust flow rate is provided in the middle of the chimney 6.

Reference numeral 15 indicates a primary combustion burner facing into the primary combustion chamber 3. In the present invention, in addition to the primary combustion burner 15 facing into the primary combustion chamber 3, there is also a secondary combustion burner inside the secondary combustion chamber 4. Burner 1
6 has been temporarily installed.

17 is a blower that sends combustion air into the primary combustion chamber 3 and the secondary combustion chamber 4, and the combustion air from the blower 17 is
The air is fed into the primary combustion chamber 3 and the secondary combustion chamber 4 through an air pipe 18 embedded in the heat-resistant caster 7, and as shown in the illustrated embodiment, the blower 17 is connected to the primary combustion chamber 3. By sharing the blower with the secondary combustion chamber 4, equipment costs can be reduced compared to the case where blowers are installed individually for the primary combustion chamber 3 and the secondary combustion chamber 4.

In FIG. 2 showing the overall structure of the chimney 6, the upper part of the chimney 6 opposite to and above the opening, and the outer periphery near the upper end of the chimney 6 are surrounded by a housing member 9.

Further, the housing bottom wall 19a that closes the bottom of the housing member 9 is inclined, and the ash extraction pipe 2o is connected to the inclined lower bottom thereof. Further, an exhaust port 21 is provided in the side wall 19b of the housing member 19, and a mesh member 22 is stretched over the exhaust port 21. on the other hand,
A water supply pipe 23 is provided within the side wall 19b of the housing member 19, located above the inclined bottom wall 19a of the housing member 19. Reference numeral 24 indicates a cover member attached at a distance from the outer periphery of the exhaust port 21 formed in the housing side wall 19b.

In the above configuration, in order to incinerate the waste, the waste is put into the primary combustion chamber 3 and the primary combustion burner 15 facing the inside of the primary combustion chamber 3 is ignited.

The high-temperature exhaust gas from the primary combustion chamber 3 generated as described above is not directly sent to the chimney 6 in a short period of time, but remains in the furnace for a long time and is completely combusted.
It is sent into the secondary combustion chamber 4, and within this secondary combustion chamber 4,
The flame from the secondary combustion burner 16 further heats it to a high temperature.

On the other hand, in the incinerator main body 1, both the primary combustion chamber 3 and the secondary combustion chamber 4 are constructed of heat-resistant casters 7 that have a large heat storage effect, and the air buried in the heat-resistant casters 7 that have a large heat storage effect Combustion air from the blower 17 is heated through the pipe 18 and blows out from the peripheral wall of the primary combustion chamber 3 in the form of a swirling flow, and the heated combustion air also blows into the secondary combustion chamber 4. The combustion efficiency in both the secondary combustion chamber 3 and the secondary combustion chamber 4 is very good, and an incineration ash elution test was performed when a paper diaper incineration process was carried out using a prototype incinerator in which each of the above-mentioned effects acts mutually. The results and the analysis results of the airflow released into the atmosphere from the chimney 6 were good as shown in Tables 1 and 2 below, respectively.

Table 1 Table 2 In addition, in the above embodiment, the exhaust gas rising inside the chimney 6 is not released into the atmosphere through the opening at the top of the chimney, which is simply provided with a rain screen, but instead is released into the atmosphere as shown in Fig. 2. ,
It collides with the top plate 19c of the housing member 19 that faces and surrounds the upper opening of the chimney 6 and the outer periphery near the upper end of the chimney, changing the flow direction and causing the housing side wall 1
It passes through the mesh member 22 from the exhaust port 21 provided at 9b and is discharged into the atmosphere.

On the other hand, relatively large floating dust that collides with the housing top plate 19c, for example, light black floating dust that has become soot-like after burning paper pieces, will eventually form an inclined housing that closes the bottom of the housing member 19. Falling onto the bottom wall 19a,
A water supply pipe 23 installed inside the housing side wall 19b, more specifically, a water supply pipe 23 installed inside the housing side wall 19b above the inclined housing bottom wall 19a.
The housing bottom wall 19a is
The floating dust collected from the outlet of the outlet pipe 20 can be disposed of appropriately in the above ground area. As described above, according to the present embodiment, floating dust in the exhaust gas incinerated in the incinerator body 1 is not released into the atmosphere and pollutes the surrounding environment, and the housing member 1
The floating dust collected in the housing member 1
Since the water from the water supply pipe 23 facing inside the housing member 9 is forcibly sent to the above ground area via the sales pipe 20, there is no need for regular maintenance of the inside of the housing member 19.

Note that, as shown in the illustrated embodiment, the housing side wall 19b
If the cover member 24 is attached to the outer periphery of the exhaust port 21 formed at a distance, the exhaust gas flow released from the exhaust port 21 to the outside of the housing member 19 collides with the cover member 24. It is dispersed around the rear and released into the atmosphere from the upper and lower ends of the cover member 24, and at this time, the exhaust gas flow from the exhaust port 21 collides with the cover member 24 and returns due to the impact. The wind pressure also affects the mesh member 22 stretched over the exhaust port 21 and acts to forcibly drop dust adhering to the mesh member 22, thereby effectively preventing clogging of the mesh member 22. can be prevented.

〔Effect of the invention〕

The present invention is as described above, and as is clear from the explanation of the illustrated embodiments, according to the present invention, not only general garbage waste but also used rubber and plastic, disposable diapers, syringe needles, etc. 9 Even when incinerating medical waste such as drip bottles and other industrial waste that is generally considered to be difficult to burn, the combustion materials are completely combusted, the exhaust gas is smokeless and odorless, and no harmful substances are contained in the incinerated ash. It is possible to provide a waste incinerator that can reduce even trace amounts of substances.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a partially longitudinal front view showing the internal structure of the incinerator of the present invention, and FIG. Part cutaway front view, 3rd
The figure is a sectional view taken along the line AA in FIG. 1, and FIG. 4 is a sectional view taken along the line BB in FIG. 3.

Claims (1)

[Scope of Claims] 1. In a waste incinerator having a structure in which waste put into the incinerator body is burned and exhaust gas generated in the incinerator is released into the atmosphere from a chimney, inside the incinerator body: , consists of a primary combustion chamber in which waste is input and undergoes primary combustion, and a secondary combustion chamber into which exhaust gas generated within the primary combustion chamber is sent, and the primary combustion chamber and the secondary combustion chamber are heat-resistant. In addition to the primary combustion burner facing into the primary combustion chamber, the heat-resistant casters are constructed of casters and have a secondary combustion burner installed in the secondary combustion chamber, and further constitute the primary combustion chamber and the secondary combustion chamber. A waste incinerator characterized in that an air passage is formed in the interior for sending combustion air from a blower into a primary combustion chamber and a secondary combustion chamber.