JPH11311405A - Waste treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of abnormal smell by burning gas, generated upon burning or roasting waste, completely. SOLUTION: A waste treatment device is provided with a gas generating chamber 12, receiving waste to burn or roast the same, and a gas combustion chamber 30, connected to the gas generating chamber 12 through a communicating tube 33 and provided with a combustion means 37. In such a waste treatment device, a combustion space 30a, burning the gas entered from the gas generating chamber 12 at the temperature not lower than 750 deg.C and having a small volume, and a buffer space 30b, maintaining the gas which passed through the combustion space 30a at the temperature not lower than 750 deg.C for 2 seconds from an exhaust port 38 provided on the gas combustion chamber 30 until the gas is exhausted and device a large volume, are provided in the gas combustion chamber 30. The gas to be burnt is burnt at the temperature higher than 750 deg.C for 2 seconds whereby the complete combustion of the gas can be effected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste treatment apparatus for reducing the amount of waste by burning or steaming the waste.

[0002]

2. Description of the Related Art Conventionally, as a waste disposal method, incineration with an incinerator has been widely performed. However, when incineration is performed, a problem of environmental pollution occurs due to emission of dust and dust. Further, when incinerating waste such as garbage having a high water content, it is necessary to dry the waste as a pretreatment for incineration, which increases the processing time and fuel cost.

[0003] Therefore, there has been proposed a waste treatment apparatus in which waste is steamed and carbonized, and gas generated when the waste is steamed is burned. For example, Japanese Patent Application Laid-Open No. 7-280236 has been proposed. And Japanese Patent Laid-Open No. 9-1
One described in Japanese Patent No. 84611 is known.

[0004]

In the waste treatment apparatus having the structure described in the above-mentioned publication and the waste treatment apparatus having the structure in which the waste is directly burned, the gas generated when the waste is steamed is used. Alternatively, in order to completely burn the gas generated when the waste is burned, the gas is
It is necessary to maintain at a high temperature of 50 ° C. or more for 2 seconds or more. However, if the combustion space for burning such gas is too wide, it is difficult to raise the combustion temperature in this combustion space to 750 ° C. or higher. Further, the gas flowing into the combustion space easily passes through the combustion space in a very short time. For this reason, the gas generated when the waste is treated is exhausted from the exhaust port as unburned gas that is not completely burnt, which causes the generation of an odor.

Accordingly, an object of the present invention is to provide a waste treatment apparatus which can completely combust gas generated when treating waste and can surely prevent generation of an odor. .

[0006]

According to the first aspect of the present invention,
In a waste treatment apparatus having a gas generation chamber for storing waste and burning or steaming the waste, and a gas combustion chamber connected to the gas generation chamber via a communication pipe and provided with combustion means, The gas flowing from the gas generation chamber is 750
A combustion space having a small volume to be burned at a temperature of at least 750 ° C., and a gas at a temperature of 750 ° C. or more at a temperature of at least 750 ° C. before the gas passing through the combustion space is exhausted from an outlet provided in the gas combustion chamber.
A buffer space having a large capacity to be maintained for more than one second was provided in the gas combustion chamber.

[0007] Therefore, since the volume of the combustion space is small, it is easy to raise the temperature in the combustion space to 750 ° C or more to burn the gas. Since the gas that has passed through the combustion space is maintained at a temperature of 750 ° C. or more in the buffer space for 2 seconds or more, the gas that has flowed into the gas combustion chamber is completely burned and exhausted from the exhaust port, and no odor is generated. .

According to a second aspect of the present invention, in the waste disposal apparatus according to the first aspect, a flow path from the combustion space to the exhaust port is formed by providing a partition in the buffer space.

Therefore, by passing the gas that has passed through the combustion space through this flow path, the distance that the gas flows through the buffer space becomes longer, and the time required for the gas that has passed through the combustion space to be exhausted from the exhaust port is reduced. For more than 2 seconds.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the appearance of the entire structure of the waste disposal apparatus. This waste treatment apparatus has a rectangular parallelepiped outer case 1, in which a combustion mechanism 2 (see FIGS. 2 and 3) for steaming waste and burning gas generated at that time is housed. ing. In the center of the front of the outer case 1, a double opening door 3 is provided so as to be openable and closable, and an operation box 4 is provided on the right side thereof. The operation box 4 includes an openable and closable door 5 and an operation panel (not shown) provided inside the door 5 and provided with various switches. A control box 6 containing a control board and the like is provided on the front side of the outer case 1 and above the operation box 4.
At the lower part on the right side of the outer case 1, there is provided a treated material discharge door 7 for taking out the waste that has been steamed and carbonized.

The combustion mechanism 2 will be described in detail. As shown in FIG. 2 and FIG.
It has a lower tank 8 and an upper tank 9, and an inner tank 10 is housed in the lower tank 8. Inner tank 10
Is supported on one side of the lower tank 8 in a cantilever state.
The inner tank 10 is provided with a waste inlet 11 which is located opposite the inlet door 3, and the inside of the inner tank 10 is a gas generating chamber for storing waste and steaming the waste. A steaming room 12 is provided. An opening / closing door 13 is provided at the waste inlet 11.

A space is formed between the inner peripheral surface of the lower tank 8 and the outer peripheral surface of the inner tank 10, and this space is used to heat the steaming chamber 12 from outside the inner tank 10. It is set to 14. The lower tank 8 is provided with a steaming burner 15 and a cooling blower 16 for sending cooling air. An exhaust valve 17 for exhausting the air sent by the cooling blower 16 is provided above the lower tank 8.

In the steaming chamber 12, a stirrer 18 for stirring the waste stored in the steaming chamber 12 is rotatably provided. As shown in FIG. 4, the stirring body 18 includes a pair of support plates 19 formed in a triangular shape, and three stirring rods 20 connecting the support plates 19. A support shaft 21 is fixed to the center of one support plate 19, and the support shaft 21 is held via a bearing 23 on an end plate 22 that closes one end of the inner tank 10.
A sprocket 24 is fixed to the tip of the support shaft 21 protruding from the end plate 22, and a sprocket 26 fixed to the sprocket 24 and the motor shaft of the stirring motor 25.
And a chain 27 is suspended between them. End plate 2
An outlet 29 provided with an opening / closing lid 28 is provided at a lower portion of 2, and this outlet 29 is located to face the processed material discharge door 7.

A gas combustion chamber 30 is formed in the upper tank 9, and a heat insulating material 31 is provided on an inner peripheral surface of the gas combustion chamber 30.
Is provided. The lower tank 8 and the upper tank 9 are connected by an outer tube 32, and the outer tube 32 connects the heating chamber 14 and the gas combustion chamber 30. Inside the outer pipe 32, an inner pipe 33, which is a communication pipe rising from the inner tank 10, is disposed. The inner pipe 33 connects the steaming chamber 12 and the gas combustion chamber 30 to each other. The gas generated by steaming the waste in the chamber 12 flows into the gas combustion chamber 30 through the inner pipe 33. The gas combustion chamber 3 of the inner pipe 33
At the opening to zero, a ventilation member 35 having a large number of small holes 34 is attached.

The combustion space 30 is provided in the gas combustion chamber 30.
a and a buffer space 30b are formed. The combustion space 30a is a region where the outer tube 32 and the inner tube 33 communicate with each other, and is surrounded by a sleeve 36 extending from the bottom surface in the gas combustion chamber 30 to the vicinity of the ceiling. The volume of the combustion space 30a is formed smaller than the volume of the buffer space 30b. A combustion burner 37, which is a combustion means, is disposed on the outer periphery of the sleeve 36 so as to face the heat.
The temperature in the combustion space 30a rises to about 900 ° C. due to the heat from the steaming burner 15 flowing through the inside of the furnace 2.

Above the upper tank 9, a buffer space 30b is provided.
An exhaust tower 38 is formed as an exhaust port that communicates with the atmosphere. In the buffer space 30b, there are provided partition walls 39 which alternately protrude from the inner peripheral surface of the upper tank 9 in directions opposite to each other. And the buffer space 30b
Inside, there is formed a flow path 40 which is partitioned by these partition walls 39 and which takes at least 2 seconds until the gas passing through the combustion space 30a reaches the exhaust tower 38. Further, by providing the heat insulating material 31 on the inner peripheral surface of the gas combustion chamber 30, the temperature of the gas flowing through the flow path 40 is maintained at about 900 ° C.

An upper portion of the outer case 1 is provided with an exhaust tower roof 41 for covering the exhaust tower 38 from above. The exhaust tower roof 41 is formed of a roof section 42 and a side wall section 43, and an outlet 44 from which exhaust gas exhausted from the exhaust tower 38 blows out is formed in the side wall section 43. Also,
A cooling fan 45 for cooling the entire periphery of the combustion mechanism 2 is provided on the upper surface of the outer case 1.

In such a configuration, first, the outline of waste treatment by the waste treatment apparatus will be described. The inlet door 3 of the outer case 1 and the opening / closing door 13 of the inner tank 10 are opened, and waste to be treated is discharged from the waste inlet 11 to the steaming chamber 12.
Put in. Then, after closing the opening / closing door 13 and the inlet door 3, the steam burner 15 and the combustion burner 37 are ignited. Further, if necessary, the stirring motor 25 is driven to rotate the stirring body 18 around the support shaft 21 to stir the waste in the steaming chamber 12.

By igniting the steaming burner 15, the temperature in the heating chamber 14 rises, and the temperature in the steaming chamber 12 rises as the temperature in the heating chamber 14 rises. The waste is steamed. Then, as the waste is steamed, gas is generated from the waste, and the gas passes through the inner pipe 33 and passes through the gas combustion chamber 30.
Flows into. And this gas is burned by the burner 37 for incineration.
And heat from the steaming burner 15 flowing into the gas combustion chamber 30 through the outer tube 32 to burn.

Here, the gas generated in the steaming chamber 12 is as follows:
The gas flows into the combustion space 30a in the gas combustion chamber 30 to start combustion. The combustion space 30a has a small volume, is sufficiently heated by the heat from the combustion burner 37, and the inside temperature rises to about 900 ° C. by the inflow of hot air from the heating chamber. doing. For this reason, the gas flowing into the combustion space 30a spontaneously ignites from the portion in contact with the inner peripheral surface of the sleeve 36 where the temperature is the highest, and the combustion starts smoothly.

The volume of the combustion space 30a is adjusted to the size of the combustion burner 37 so that the temperature in the combustion space 30a can be maintained at about 900 ° C. during waste disposal. When the capacity of the combustion burner 37 is small, the capacity of the combustion space 30a is reduced accordingly. And, by reducing the volume of the combustion space 30a,
Even if the combustion burner 37 with a small capacity is used, the combustion space 3
The temperature in Oa can be maintained at least at about 900 ° C., and the fuel consumption can be reduced by using the combustion burner 37 having a small capacity.

Further, the gas entering the combustion space 30a from the combustion chamber 12 passes through a large number of small holes 34, so that the surface area of the gas becomes large, and the gas in the combustion space 30a is easily burned completely.

The gas whose combustion has started in the combustion space 30a passes through the combustion space 30a while burning, and passes through the buffer space 3a.
Ob flows into a flow path 40 formed by being partitioned by a partition wall 39, and is exhausted from an exhaust tower 38. The temperature of the gas in the buffer space 30b has risen since combustion has started in the combustion space 30a.

The heat insulating material 31 is provided on the inner peripheral surface of the gas combustion chamber 30 including the buffer space 30b.
The heat in the buffer space 30b is hardly transmitted to the outer peripheral side of the upper tank 9, and the heat in the buffer space 30b is hard to escape from the exhaust tower 38 because the inside of the buffer space 30b is partitioned by the partition wall 39. For this reason, the temperature of the burning gas flowing into the buffer space 30b is maintained at about 900 ° C. Moreover, since the gas during combustion flowing into the buffer space 30b flows along the flow path 40 partitioned by the partition wall 39, the flow distance of the gas during combustion becomes longer and the time required for the gas to reach the exhaust tower 38 becomes longer. Takes at least 2 seconds. Therefore, the burning gas that has flowed into the buffer space 30b after passing through the combustion space 30a is maintained at a temperature of about 900 ° C. for at least 2 seconds to completely burn, and the unburned gas is discharged to the atmosphere. And the generation of off-flavors is prevented.

When a predetermined period of time has elapsed after the start of the waste treatment and gas is no longer generated from the waste put into the steaming chamber 12, the steaming burner 15 and the combustion burner 37 are stopped. Then, cooling air is blown by the cooling blower 16 to cool the inner tank 10, and after this cooling, the processed material discharge door 7 and the opening / closing lid 28 are opened, and the steaming chamber 12 is opened.
The remaining carbonized waste is taken out, and the waste disposal is completed.

In this embodiment, the case where the combustion temperature is raised to about 900 ° C. and the temperature is maintained for 2 seconds has been described as an example. However, in order to completely burn the gas, the theoretical value is required. As long as the combustion temperature of 750 ° C. can be maintained for 2 seconds.

Also, depending on the type of waste to be treated, the generated gas is difficult to burn. In the case of treating such waste, the number of the partition walls 39 is increased and the flow path 40 is lengthened, so that the gas being combusted flows into the buffer chamber 30.
The gas is completely burned by increasing the time of staying in b. Also, by reducing the diameter of the exhaust tower 38, the time during which the gas stays in the buffer chamber 30b can be prolonged.

In this embodiment, a waste treatment apparatus of a system in which waste is steamed in the steaming chamber 12 and gas generated at that time is burned in the gas combustion chamber 30 has been described as an example. However, the waste disposal apparatus to which the present invention can be applied is not limited to such a type. For example, the present invention can be applied to a waste treatment apparatus in which waste is burned in a primary combustion chamber and gas generated by the combustion is completely burned in a secondary combustion chamber.

[0029]

According to the first aspect of the present invention, there is provided a gas generating chamber for storing waste and burning or steaming the waste,
In a waste treatment apparatus having a gas combustion chamber connected to the gas generation chamber via a communication pipe and having a combustion means, a small-volume combustion for burning gas flowing from the gas generation chamber at a temperature of 750 ° C. or higher. A space and a large buffer space for maintaining the gas passing through the combustion space at a temperature of 750 ° C. or more for 2 seconds or more before exhausting the gas through an exhaust port provided in the gas combustion chamber are provided in the gas combustion chamber. Since it is provided, it is possible to easily burn the gas by raising the temperature in the combustion space having a small volume to 750 ° C. or more. The gas that has passed through the combustion space is maintained at a temperature of 750 ° C. or more in the buffer space for 2 seconds or more,
The gas that has flowed into the gas combustion chamber can be completely burned, and it is possible to prevent the gas in the unburned state from being exhausted and the generation of an odor.

According to a second aspect of the present invention, in the waste disposal apparatus according to the first aspect of the present invention, a gas passage is formed from the combustion space to the exhaust port by providing a partition in the buffer space. The distance flowing in the space becomes longer, and the time until the gas passing through the combustion space is exhausted from the exhaust port can be secured for 2 seconds or more, and the gas flowing into the gas combustion chamber can be completely burned reliably. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a waste disposal apparatus according to an embodiment of the present invention.

FIG. 2 is a vertical sectional front view showing a structure of a combustion mechanism.

FIG. 3 is a vertical side view showing a structure of a combustion mechanism.

FIG. 4 is an exploded perspective view showing an internal structure of a lower tank.

[Explanation of symbols]

 12 Gas generation chamber 30 Gas combustion chamber 30a Combustion space 30b Buffer space 37 Combustion means 38 Exhaust port 39 Partition wall 40 Flow path

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiko Endo 570 Ohito, Oni-cho, Tata-gun, Shizuoka Prefecture Inside the Tech Ohi Works, Inc.

Claims (2)

[Claims] 1. A waste having a gas generation chamber for storing waste and burning or steaming the waste, and a gas combustion chamber connected to the gas generation chamber through a communication pipe and provided with combustion means. In the treatment apparatus, a combustion space having a small volume for burning gas flowing from the gas generation chamber at a temperature of 750 ° C. or more, and gas passing through the combustion space is exhausted from an exhaust port provided in the gas combustion chamber. A waste water treatment apparatus, wherein a large buffer space for maintaining the temperature at 750 ° C. or higher for 2 seconds or longer is provided in the gas combustion chamber. 2. The waste treatment apparatus according to claim 1, wherein a flow path from the combustion space to the exhaust port is formed by providing a partition in the buffer space.