JPH067005B2 - Rotary two-stage incinerator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an incinerator for industrial wastes from factories and other sources, domestic wastes such as municipal solid wastes, and various wastes such as sludge. Type improvement of incinerator.

2. Description of the Related Art Conventional technology and its problems As a waste incinerator as described above, a rotary incinerator, a fluidized bed incinerator, etc. have been conventionally known.

Of these, as shown in FIG. 2, the rotary incinerator is provided with a rotary furnace (51) including a drying zone (51a) on the starting end side and an incineration zone (51b) on the ending side, and a starting end portion thereof. Waste input port (52) and a burner installed at the end of the rotary furnace (51).
(53) and the combustion air supply port (54), the ash discharge port (55) provided at the bottom end of the rotary furnace (51), and the exhaust gas discharge path (at the top end of the start point of the rotary furnace (51) ( 56) and are the main components. As the rotary furnace (51) rotates, the solid charge is lifted along the inner surface of the furnace having an arc-shaped cross section, which then falls to expose a new surface, which promotes drying and incineration.
Then, the waste is dried in the drying zone (51a) and then moved to the incineration zone (51b) where it is incinerated. Exhaust gas generated by incineration contains odor and its temperature drops to about 300 ° C. If untreated, it will be emitted into the atmosphere, causing pollution problems. Therefore, the exhaust gas is reheated to about 800 ° C in the deodorization furnace (57) to deodorize it, and the dust collector (58)
Through the chimney (59) to the outside of the system.

The rotary incinerator operates as described above, but it is said to be inferior to the fluidized bed incinerator in terms of construction cost, maintenance cost, and size of installation area.

An object of the present invention is to provide a rotary incinerator capable of greatly improving the above drawbacks without impairing the advantages of the rotary incinerator.

Means for Solving the Problems The rotary incinerator according to the present invention has, in order to achieve the above object, a rotary rotary incinerator (1) arranged at an upper side and having a waste input port (2) at a starting end, A rotary incinerator (3) having a burner (4) and a combustion air supply port (5) at the end, and a rotary incinerator (3) from the end of the rotary drier (1) for drying. ) Is provided at the starting end of the rotary incinerator (3) and the end of the rotary incinerator (1) is connected to the incinerator and the supply of combustion air is provided. Exhaust gas flow dividing chamber (7) for sending the exhaust gas corresponding to the amount to the stack (8) to the drying rotary furnace (1) respectively, and the incinerator rotary furnace (from the starting end of the drying rotary furnace (1) ( And a ventilation chamber (9) provided at the end of (3) so as to communicate with each other.

In this specification, the "starting end" and "terminating end" of a rotary furnace
Shall be used with reference to the waste stream to be treated.

In the case of large-scale equipment, a heat exchanger (12) for preheating air is installed on the upper end of the chimney (8), and the combustion air preheated by the heat exchanger (3) is incinerator rotary furnace (3). Is supplied to.

Example Next, an example of the present invention will be specifically described with reference to the drawings.

The rotary incinerator according to the present invention is mainly composed of a drying rotary furnace (1) arranged on the upper side and an incinerator rotary furnace (3) arranged on the lower side. It consists of a rotary furnace. At the start end of the rotary oven for drying (1), a waste inlet (2) with a downward slope is provided, and at the end of the rotary oven for incineration (3), an internal burner (4) and an external burner are provided. The air supply port (5) is provided concentrically.

A dry material transport path (6) is provided from the end of the rotary oven for drying (1) to the start of the rotary oven for incineration (3).
An exhaust gas distribution chamber (7) is provided in communication from the starting end of the incinerator rotary furnace (3) to the terminal end of the drying rotary furnace (1). By this exhaust gas distribution chamber (7), a portion of the exhaust gas generated in the incinerator rotary furnace (3) corresponding to the supply amount of combustion air is sent to the chimney (8), and the remainder is the drying rotary furnace (1). ) Is sent to. An aeration chamber (9) is provided so as to communicate from the start end of the rotary rotary oven (1) to the end of the rotary rotary furnace (3) for incineration. The gas used for drying is introduced from the rotary oven for drying (1) into the rotary oven for incineration (3) as secondary air for combustion by the ventilation chamber (9). Ash exhaust ports (10) and (11) are provided at the lower ends of the exhaust gas distribution chamber (7) and the ventilation chamber (9), respectively.

In the incinerator having the above-mentioned configuration, the waste put into the starting end of the rotary rotary oven (1) from the waste input port (2) is first dried by high-temperature exhaust gas as the rotary furnace (1) rotates. To be done. Then, the dried waste is conveyed from the rotary dryer for drying (1) to the rotary furnace for incineration (3) by the dry material transport path (6), and the combustion air is accompanied by the rotation of the rotary furnace (3). Burned by. Of the exhaust gas generated by the incineration, a portion corresponding to the supply amount of combustion air is discharged from the chimney (8) to the atmosphere. In addition, the residue is sent to the rotary oven for drying (1), used there as a gas for drying, and then introduced as secondary air for combustion into the rotary oven for incineration (3) through the ventilation chamber (9). To be done.

Thus, the following points can be cited as the advantages of releasing a part of the exhaust gas into the atmosphere and recirculating the remaining part to the incineration zone.

B) By recirculating the odorous exhaust gas that has passed through the drying rotary furnace (1) to the incinerator rotary furnace (3), the odorous components can be oxidized and deodorized in the same furnace (3). . Therefore, installation of a deodorizing furnace can be omitted.

(B) The waste heat of the incinerator rotary furnace (3) can be recovered in the drying rotary furnace (1) by recirculating the exhaust gas.

C) Since the exhaust gas to the chimney (8) exits from the outlet of the rotary incinerator (3), the exhaust gas without odor can be released to the atmosphere. Therefore, also in this respect, the installation of the deodorizing furnace can be omitted.

In addition, when the device is large-scale, the chimney (8)
A heat exchanger (12) for air preheating is installed on the upper end of the so that combustion air preheated by the heat exchanger (3) is incinerated.
Is supplied to. By thus saving energy, the maintenance cost of the device can be reduced.

EFFECTS OF THE INVENTION The rotary incinerator according to the present invention is a rotary rotary incinerator (1) arranged on the upper side and a rotary incinerator (3) arranged on the lower side.
Since it mainly consists of and, compared with the conventional rotary incinerator described at the beginning of this document that consists of a drying zone on the start side and an incineration zone on the end side, the installation area of the device is greatly reduced. be able to. Further, with the above structure, the device can be made compact and the construction cost can be reduced.

In addition, this rotary incinerator is provided so as to communicate from the start end of the incinerator rotary furnace (3) to the end of the rotary rotary furnace (1) and to generate an amount of exhaust gas equivalent to the supply amount of combustion air. An exhaust gas flow dividing chamber (7) for sending the residue to the chimney (8) respectively to the drying rotary furnace (1), and a communication form from the start end of the drying rotary furnace (1) to the end of the incinerator rotary furnace (3). Since it is equipped with a ventilation chamber (9) provided in, the odorous exhaust gas that has passed through the drying rotary furnace (1) is recirculated to the incinerator rotary furnace (3), thereby In 3), gas components can be oxidized to deodorize, and odorless exhaust gas can be released to the atmosphere from the outlet of the incinerator rotary furnace (3). Therefore, the installation of the deodorizing furnace can be omitted, and the installation area of the device can be reduced also in this respect. Further, by omitting the deodorizing furnace, heat dissipation from the deodorizing furnace unlike the conventional device is completely eliminated, fuel cost can be reduced accordingly, and energy saving can be achieved.

Further, the waste inlet (2) is provided at the beginning of the drying rotary furnace (1), and the burner (4) and the combustion air supply port (5) are provided at the end of the incinerator rotary furnace (3). Since it is provided, the waste inlet (2), the burner (4) and the combustion air supply (5) are located at the same end of the device. Therefore, the rotary incinerator of the present invention can be operated with good operability.

[Brief description of drawings]

FIG. 1 is a vertical vertical sectional view of a rotary incinerator showing an embodiment of the present invention, and FIG. 2 is a vertical vertical sectional view of a rotary incinerator showing a conventional technique. (1) ... Rotary oven for drying, (2) ... Waste input port, (3)
... Rotating furnace for incineration, (4) ... Burner, (5) ... Combustion air supply port, (6) ... Dry material transport passage, (7) ... Exhaust gas distribution chamber, (8) ... Chimney, (9) ... Aeration Room.

Claims (1)

[Claims] 1. Drying rotary furnace (1) arranged on the upper side and having a waste inlet (2) at the start end, and a burner (4) and combustion air supply arranged on the lower side and at the end. An incinerator rotary furnace (3) having a mouth (5), and a dry matter transport path (6) provided from the end of the dryer rotary furnace (1) to the start of the incinerator rotary furnace (3). The exhaust gas, which is provided in communication from the starting end of the incinerator rotary furnace (3) to the end of the drying rotary furnace (1) and corresponds to the supply amount of combustion air, dries the residue to the chimney (8). Exhaust gas diversion chamber (7) for sending to the rotary kiln (1) for ventilation, and a ventilation chamber (9) provided in communication from the start end of the rotary kiln for drying (1) to the end of the rotary kiln (3) for incineration A rotary two-stage incinerator equipped with.