JP3274092B2 - Heat treatment system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a system for performing a heat treatment such as incineration and melting after drying a processing material.

[0002]

2. Description of the Related Art Conventionally, as a heat treatment system, for example, a drying device for drying a treatment material, a heat treatment main device for heating the treatment material dried by the drying device, and a high exhaust gas from the heat treatment main device are used. There is known an apparatus having an adjusting device for performing heat treatment.

[0003] In this conventional heat treatment system, heat treatment such as incineration and melting with high heat efficiency can be performed in a heat treatment main unit by drying a powdery or muddy treatment material which is easily absorbed by a drying device. Be able to do it. The adjusting device decomposes harmful substances such as dioxin to prevent release to the atmosphere.

[0004]

In the above-described conventional heat treatment system, it is difficult to provide a heat supply system and a heat recovery system without impairing the functions of the heat treatment main unit and the adjusting device. There is a problem that the heat of the processing main unit and the adjusting device is not effectively used inside the system.

The present invention has been made in view of such problems, and provides a heat supply system and a recovery system without impairing the functions of the heat treatment main unit and the adjusting device. It is an object of the present invention to provide a heat treatment system in which the heat of the device and the adjusting device is effectively used inside the system.

[0006]

In order to solve the above-mentioned problems, a heat treatment system according to the present invention employs the following means.

That is, in the first aspect, a drying device for drying the processing material, a heating device for heating the processing material dried by the drying device, and an adjusting device for performing a high heat treatment on the exhaust gas of the heating device. In the heat treatment system comprising: a heat supply path connected to the drying device and the adjusting device and introducing a part of the exhaust gas of the adjusting device to the drying device as a drying heat source; and discharging the exhaust gas of the adjusting device introduced to the drying device. A secondary adjustment device for performing low-temperature processing; and a heat recovery passage connected to the drying device and the secondary adjustment device, the exhaust gas of the adjustment device introduced into the drying device being recovered to the secondary adjustment device. .

In this means, the heat of the heat treatment main unit and the adjusting device is used in the drying device. Further, since the drying heat source of the drying device is obtained from the exhaust gas of the adjusting device after the high heat treatment, the thermal efficiency of the heat treatment main unit and the adjusting device does not decrease. In addition, since the exhaust heat from the drying device is recovered by the secondary adjustment device that performs low-temperature processing on the exhaust gas from the adjustment device, the high heat treatment of the adjustment device is not hindered.

According to a second aspect of the present invention, in the heat treatment system of the first aspect, a heat exchange device for heating air supplied to the heat treatment main unit is connected to the heat supply path.

In this means, the heat of the heat treatment main unit and the adjusting device is reused in the heat treatment main unit.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a heat treatment system according to the present invention will be described below with reference to the drawings.

In this embodiment, a heat treatment for melting a processing material R made of incinerated ash, sludge, or the like is shown.

In this embodiment, as shown in FIG. 1, a processing material R dried by a drying device 1 is melted by a heat treatment main unit 2 comprising a melting device to form a slag S in which heavy metals and the like are stabilized. It is configured to be.

A drying material 1 is connected to a processing material stocker 4 for storing the processing material R via a conveyor 3 for carrying the processing material R into the drying device 1 in fixed amounts.

The drying apparatus 1 has a double pipe structure for drying the processing material R carried in by the conveyor 3 mainly by heating. As the drying heat source, an adjusting device 5 for performing high heat treatment on the exhaust gas G of the heat treatment main body device 2 to decompose dioxin and the like.
A part of the exhaust gas G is used. That is, the heat supply path 6 is connected between the drying device 1 and the adjusting device 5. The heat supply path 6 is provided in the drying device 1 in consideration of thermal efficiency.
Is connected to the lower side of the flow of the processing material R in the above.

The adjusting device 5 includes, in series, a combustion chamber 5a for performing combustion by a burner or the like and a temperature adjusting chamber 5c for adjusting the temperature by spraying cooling water from a nozzle 5b from the heat treatment main unit 2 side. I have.

The adjusting device 5 is provided with a secondary adjusting device 7 for treating the exhaust gas G collected from the drying device 1 at a low temperature.

The secondary adjusting device 7 prepares the operating environment of the bag filter 9 by subjecting the exhaust gas G collected from the drying device 1 to low-temperature treatment by spraying cooling water from the nozzle 7 '. Drying equipment 1 and 2
A heat recovery path 8 is connected between the next adjusting device 7. The heat recovery path 8 is connected to the upstream side of the flow of the processing material R in the drying device 1 in consideration of thermal efficiency.

The bag filter 9 is connected to an exhaust pipe 11 through an exhaust fan 10.

Further, in this embodiment, the drying device 1
The air containing moisture of the processing material stocker 4 is sucked by the blower 12 on the upper side of the processing material stocker 4, and the heat treatment body is connected via a heat storage type heat exchange device 13 connected between the adjusting device 5 and the heat supply path 6. The burner 2a of the apparatus 2 utilizes the combustion air heated. In addition, air containing moisture inside the heat insulating partition 2b of the heat treatment main unit 2 on the lower side of the drying device 1 is sucked by the blower 14 and used as combustion air in the combustion chamber 5a of the adjusting device 5. This use of combustion air involves effective dehumidification of each part.

In addition, a hopper 15 with a rotary valve and a screw feeder 16 for transporting the dried processing material R by a fixed amount are connected between the drying apparatus 1 and the heating processing main unit 2.

Further, a water-cooled slag discharge scraper 17 for cooling and recovering the formed slag S is connected to the heat treatment main unit 2.

A bypass 18 is connected between the exhaust pipe 11 and the heat exchanger 13 for preventing white smoke from being generated from the exhaust pipe 11 by contact with relatively high-temperature air.
The supply source of this air is the aforementioned dehumidifying blower 12.

According to this embodiment, since only the arrangement of the heat supply path 6 and the heat recovery path 8 and the connection of the heat exchange device 17 are employed and no complicated control equipment is provided, the equipment is inexpensive and easily installed. can do.

Further, according to this embodiment, the heat of the heat treatment main unit 2 and the adjusting device 5 is used not only by the drying unit 1 but also by the heat treatment main unit 2.

In the use and reuse of this heat, since the drying heat source of the drying device 1 and the heating source of the combustion air of the heat treatment main unit 2 are obtained from the exhaust gas G of the adjusting device 5 after the high heat treatment, the heat treatment is performed. The thermal efficiency of the main unit 2 and the adjusting device 5 does not decrease. In addition, since the exhaust gas G from the drying device 1 is collected by the secondary adjusting device 7 that processes the exhaust gas G from the adjusting device 5 at a low temperature, the high heat treatment of the adjusting device 5 is not hindered.

As described above, in addition to the illustrated embodiment, the heat treatment main unit 2 can be widely applied to heat treatment other than the melting device.

Further, depending on the structure of the drying device 1, it is possible to cause a mechanical drying operation using the wind pressure of the exhaust gas G of the adjusting device 5.

Further, depending on the structure of the drying device 1, it is possible to connect another heat exchange device to the heat supply path 6 so as to dry with another heat exchanged medium.

[0030]

In the illustrated embodiment described above, assuming that the heat treatment is performed at about 1500 ° C. in the heat treatment main unit 2, a high heat treatment at 1400 ° C. is performed by the adjusting device 5 and the drying device 1 The exhaust gas G of 400 ° C. is provided, and the combustion air of 400 ° C. is provided to the heat treatment main unit 2. The heat of the exhaust gas G recovered in the heat recovery path is 14
It will be about 0 ° C.

[0031]

As described above, in the heat treatment system according to the present invention, the heat of the heat treatment main unit and the adjusting device is used in the drying unit and reused in the heat treatment main unit 2, and the heat treatment system in which the high heat treatment has been completed. From the exhaust gas, a drying heat source of the drying device and a heating source of the combustion air of the heat treatment main device are obtained, and the heat treatment main device and the adjusting device 5 do not reduce the thermal efficiency. Since it is collected by the secondary adjustment device that performs low-temperature treatment and does not hinder the high heat treatment of the adjustment device, a heat supply system and a recovery system are provided without impairing the functions of the heat treatment main unit and the adjustment device. Thus, there is an effect that the heat of the heat treatment main unit and the adjusting device is effectively used inside the system.

Further, since the system is constituted only by the arrangement of the heat supply path and the heat recovery path and does not include complicated control equipment, there is an effect that the equipment can be inexpensively and easily installed.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a heat treatment system according to the present invention.

FIG. 2 is an operation block diagram of a main part of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying apparatus 2 Heat processing main body apparatus (melting apparatus) 5 Adjustment apparatus 6 Heat supply path 7 Secondary adjustment apparatus 8 Heat recovery path G Exhaust R Processing material

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ identification code FI F23J 15/00 F23J 15/00 D 15/04 K 15/06 F (58) Investigation field (Int.Cl. ⁷ , DB name ) F23G 5/04 ZAB F23G 5/00 F23G 5/46 F23J 15/00 F23J 15/04 F23J 15/06

Claims (2)

(57) [Claims] A heating device comprising: a drying device for drying a processing material; a heating device for heating the processing material dried by the drying device; and an adjusting device for performing a high heat treatment on the exhaust gas from the heating device. In the processing system, a heat supply path connected to the drying device and the adjusting device for introducing a part of the exhaust gas of the adjusting device to the drying device as a drying heat source, and a secondary process for processing the exhaust gas of the adjusting device introduced to the drying device at a low temperature. An adjusting device;
A heat treatment system, comprising: a heat recovery path connected to the drying device and the secondary adjustment device, the exhaust gas of the adjustment device introduced into the drying device being collected by the secondary adjustment device. 2. The heat treatment system according to claim 1, wherein
A heat treatment system, wherein a heat exchange device for heating air supplied to the heat treatment main unit is connected to the heat supply path.