JP3190316B2 - Heat treatment equipment with carbonization furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a carbonization furnace capable of incinerating various combustible wastes such as industrial wastes, and performing a heat treatment using a carbonization gas generated at that time. The present invention relates to a heat treatment apparatus as described above.

[0002]

2. Description of the Related Art Conventionally, in order to incinerate various flammable wastes such as industrial wastes and to effectively use the heat of the flammable wastes, a heat treatment apparatus having a carbonization furnace has been used. Have been. This heat treatment apparatus is usually configured by combining a carbonization furnace and a combustion chamber, and in the carbonization furnace, combustible waste as fuel is produced under a limited supply of primary air to produce combustible carbonized gas. Then, the carbonized gas thus obtained is introduced into a combustion chamber and completely burned, and the calorific value is used.

[0003]

However, in recent years, harmful substances such as dioxins generated when incinerating combustible wastes at treatment plants for incinerating various combustible wastes such as industrial wastes. However, it has become a major social problem. Although this harmful substance, particularly dioxin, has extremely high toxicity, it is generally said that its generation can be suppressed by stable high-temperature combustion.

[0004] Such stable high-temperature combustion of combustible waste can be relatively easily realized in a large-scale incinerator equipped with an incinerator capable of continuously treating a large amount of combustible waste. In a small incinerator equipped with an incinerator that batch-processes a small amount of combustible waste, there is a problem that it is extremely difficult to stably maintain the combustion temperature at a high temperature.

The present invention can suppress the generation of harmful substances such as dioxin regardless of the amount of combustible waste to be treated, whereby it can be applied to small incinerators and industrial waste in a carbonization furnace. It is an object of the present invention to provide a heat treatment apparatus capable of performing various heat treatments by using a carbonization gas generated when incinerating various combustible wastes such as wastes.

[0006]

In order to achieve the above object, a heat treatment apparatus provided with a carbonization furnace according to the present invention comprises an ignition burner which burns fuel under a limited supply of primary air to produce carbonized gas. And a secondary combustion chamber provided with a secondary burner for burning the carbonization gas supplied from the carbonization furnace under the supply of secondary air, and stacking the material to be treated in a substantially vertical direction.
Again accommodated, the line heat treatment by introducing the combustion gas supplied from the lower workpiece from said secondary combustion chamber Utotomo
In the lower part, a melting tank is formed, and the combustion gas after heat treatment is
And a tertiary combustion chamber provided with a tertiary burner for completely burning the combustion gas discharged from the heat treatment furnace under the supply of tertiary air.

The heat treatment apparatus provided with the carbonization furnace burns various combustible wastes, such as industrial wastes, serving as fuel under a limited supply of primary air in a carbonization furnace equipped with an ignition burner. Is introduced into a secondary combustion chamber equipped with a secondary burner and burns under the supply of secondary air, and this combustion gas is used in a vertical heat treatment furnace. After the heat treatment of the material to be processed introduced from below, the combustion gas discharged from the heat treatment furnace is further
It is introduced into a tertiary combustion chamber equipped with a tertiary burner so that it is completely burned under the supply of tertiary air.

[0008] The heat for performing the heat treatment of the material to be treated is
Since the processing furnace is formed as a vertical type in which the combustion gas is introduced from below, the heat treatment efficiency is high, and metals such as aluminum can be reliably melted and separated from the waste material to be processed.

In this case, in the tertiary combustion chamber,
By heating the supplied combustion gas at 800 ° C. or higher for 2 seconds or longer to completely burn, it is possible to reliably prevent generation of harmful substances such as dioxin.

[0010]

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

FIG. 1 shows an outline of an embodiment of a heat treatment apparatus having a dry distillation furnace according to the present invention. The heat treatment apparatus provided with the carbonization furnace has an ignition burner 16 which is independently configured and connected to each other by a duct and burns fuel under a supply of restricted primary air to generate a carbonization gas. And a secondary combustion chamber 2 having a secondary burner 22 for burning the carbonization gas supplied from the carbonization furnace 1 under the supply of the secondary air. A vertical heat treatment furnace 3 for introducing a combustion gas supplied from the secondary combustion chamber 2 from below to heat the material to be treated, and a combustion gas discharged from the heat treatment furnace 3 is supplied with tertiary air. A tertiary combustion chamber 4 having a tertiary burner 42 for complete combustion.

In this case, the carbonization furnace 1 is constituted by a wall made of a refractory (which can be water-cooled as a jacket if necessary). An ignition burner 16 for igniting various combustible wastes such as industrial wastes serving as fuel, such as waste tires, is provided at the bottom of the carbonization furnace 1, more specifically, below the grate 12. At the same time, a primary air supply means 11 having a damper 11a is connected to supply a limited amount of primary air into the dry distillation furnace 1. An ash lake 13 is disposed below a grate 12 of the carbonization furnace 1. The ash lake 13 is rotated by a driving device 14 installed below the carbonization furnace 1 to scrape combustion ash into an ash box 15. So they can be dropped. A fuel inlet 16 for charging combustible waste is provided at the upper part of the carbonization furnace 1.
And a dry distillation gas outlet 17 communicating with the secondary combustion chamber 2.

The secondary combustion chamber 2 is formed of a wall made of a refractory (which can be water-cooled as a jacket if necessary), similarly to the dry distillation furnace 1. The secondary combustion chamber 2 is provided with a carbonization gas inlet 21 to which the carbonization gas from the carbonization furnace 1 is supplied, and a secondary burner 22 for igniting the supplied carbonization gas. . In the middle part of the secondary combustion chamber 2, a secondary air supply means 23 for completely burning the carbonized gas is provided. In the present embodiment, the secondary air supply means 23 is And a plurality of annular air supply pipes surrounding the periphery of the second combustion chamber 2 so that a sufficient amount of air can be uniformly fed from the air supply pipe toward the center of the secondary combustion chamber 2. Further, a combustion gas outlet 25 communicating with the heat treatment furnace 3 and a dust collecting unit 24 are formed in a lower portion of the secondary combustion chamber 2, and the dust collecting unit 24 removes dust by removing the dust collecting unit 24 from the flange 24a. I can do it.

The heat treatment furnace 3 is, like the dry distillation furnace 1, a vertical wall-shaped body made of a refractory, and includes a material to be treated, for example, a metal such as aluminum, through an upper charging port 33. It is configured such that waste can be charged and the materials to be treated can be stacked and accommodated in a substantially vertical direction. The heat treatment furnace 3 has a combustion gas inlet 31 at a lower portion to which the combustion gas from the secondary combustion chamber 2 is supplied, and the temperature of the combustion gas is lower than a predetermined temperature for performing the heat treatment of the material to be processed. When the temperature is low, a temperature control burner 32 for increasing the temperature of the combustion gas as necessary is provided. In the case of the present embodiment, the heat treatment furnace 3 heats and melts waste containing a metal such as aluminum, which is stacked and accommodated in a substantially vertical direction, by using a combustion gas, and forms a melting tank 34 formed below the heat treatment furnace 3. It is configured such that a metal such as aluminum that has been melted can be stored. The melting tank 34 has a light material outlet 34a and a heavy material outlet 34b so that the molten metal can be taken out according to the specific gravity difference. In addition, a combustion gas outlet 35 communicating with the tertiary combustion chamber 4 is formed in the upper part of the heat treatment furnace 3.

The tertiary combustion chamber 4 is formed of a wall made of a refractory like the carbonization furnace 1. The tertiary combustion chamber 4 has a combustion gas inlet 41 to which the combustion gas from the heat treatment furnace 3 is supplied, and a tertiary burner 42 for igniting and reheating the supplied combustion gas. You. In an intermediate portion of the tertiary combustion chamber 4, tertiary air supply means 43 for completely burning the combustion gas is provided. In the present embodiment, the tertiary air supply means 43 is provided.
Is composed of a plurality of annular air supply pipes surrounding the periphery of the tertiary combustion chamber 4 so that sufficient air can be uniformly fed in a planar manner from the air supply pipe toward the center of the tertiary combustion chamber 4. ing. A lower portion of the tertiary combustion chamber 4 has a combustion gas outlet 45 communicating with an appropriate exhaust gas treatment device (not shown), a damper 45 a for adjusting the amount of exhaust gas discharged from the combustion gas outlet 45, and a dust collecting section 44. Are formed, and the dust collecting section 44 can take out the dust by removing the dust collecting section 44 from the flange section 44a. In the tertiary combustion chamber 4, the supplied combustion gas is completely decomposed by heating at 800 ° C. or more for 2 seconds or more, thereby thermally decomposing, thereby ensuring that harmful substances such as dioxin are discharged. So that it can be prevented.

In this heat treatment apparatus, the combustion temperature of various combustible wastes such as industrial waste as fuel in the carbonization furnace 1 and the waste containing metal such as aluminum as a material to be treated in the heat treatment furnace 3 are used. In order to control the heat treatment temperature of the secondary combustion chamber 2, thermometers Th1, Th2, and Th3 are respectively provided in the heat treatment furnace 3 and the tertiary combustion chamber 4, and a static pressure detector 26 is provided in the secondary combustion chamber 2. ing. Among them, the thermometer Th1 connects the damper 11a and the secondary burner 22 of the primary air supply means 11 to the thermometer Th1.
2 is a temperature control burner 32, and a thermometer Th3 is a tertiary burner 42.
Are controlled by the detected temperatures. The static pressure detector 26 measures the static pressure at the combustion gas outlet 25 of the secondary combustion chamber 2. The static pressure detector 26 measures the static pressure of the combustion gas outlet of the tertiary combustion chamber 4 in proportion to the output signal of the static pressure detector 26. By opening and closing the damper 45a disposed on the 45,
The static pressure at the combustion gas outlet 25 of the secondary combustion chamber 2 is controlled to a predetermined value so that stable combustion is performed in the secondary combustion chamber 2.

In the heat treatment apparatus provided with the carbonization furnace of the present embodiment, in the carbonization furnace 1 provided with the ignition burner 16, various combustible wastes such as industrial wastes which become fuel under a limited supply of primary air. The material is burned to generate a flammable carbonized gas, and the carbonized gas thus obtained is supplied to the secondary burner 22.
After being introduced into the secondary combustion chamber 2 provided with a secondary combustion chamber and burning under the supply of secondary air, and then introducing this combustion gas from below the vertical heat treatment furnace 3 to heat the material to be treated. Then, the combustion gas discharged from the heat treatment furnace 3 is introduced into the tertiary combustion chamber 4 provided with the tertiary burner 42 so as to be completely burned under the supply of tertiary air.

As described above, since the heat treatment furnace 3 is formed as a vertical type in which the combustion gas is introduced from below, the heat treatment efficiency is high, and the metal such as aluminum is reliably melted from the waste material to be treated. Can be separated.

Further, in the tertiary combustion chamber 4, the supplied combustion gas is heated at 800 ° C. or more for 2 seconds or more so as to be completely burned, so that dioxin or the like can be obtained regardless of the amount of combustible waste. Generation of harmful substances can be reliably prevented.

The heat treatment apparatus provided with the carbonization furnace uses various combustible wastes such as industrial wastes such as waste tires as fuel for the carbonization furnace 1, while the heat treatment furnace 3 uses aluminum as a material to be treated. Metals such as aluminum can be melted and separated from waste containing metals such as, and resources can be recycled using waste generated in the same business establishment.

In addition, the combustible waste as fuel into the dry distillation furnace 1 can be charged by a batch process or a continuous process.

As described above, in the heat treatment apparatus provided with the dry distillation furnace of the present invention, the case of melting and separating metal such as aluminum from waste containing metal such as aluminum in the heat treatment furnace 3 has been described. The heat treatment apparatus equipped with this carbonization furnace has various other uses, specifically,
For the purpose of making the incinerated ash non-polluting, it can be used for performing heat treatment such as reheating the incinerated ash by adding glass as needed to the incinerated ash and solidifying it into a glass state.

[0023]

According to the heat treatment apparatus provided with a carbonization furnace of the present invention, in a carbonization furnace equipped with an ignition burner, various combustible wastes such as industrial wastes which become fuel under a limited supply of primary air. Burning things to produce flammable carbonized gas,
The dry distillation gas thus obtained is introduced into a secondary combustion chamber equipped with a secondary burner and burned under the supply of secondary air, and the combustion gas is introduced from below the vertical heat treatment furnace to be processed. After the heat treatment, the combustible gas discharged from the heat treatment furnace is further introduced into a tertiary combustion chamber equipped with a tertiary burner so as to be completely burned under the supply of tertiary air. The generation of harmful substances such as dioxin can be suppressed irrespective of the amount of waste processed, which allows it to be applied to small-scale incinerators and to remove various combustible waste such as industrial waste in a dry distillation furnace. Various heating treatments can be performed using the carbonization gas generated during the incineration treatment, which can contribute to environmental conservation and economical resource recycling through energy saving and labor saving.

Since the heat treatment furnace for performing the heat treatment of the material to be treated is formed in a vertical type in which the combustion gas is introduced from below, the heat treatment efficiency is high, and the material to be treated is made of aluminum or the like. Metals can be reliably separated.

In the tertiary combustion chamber, the supplied combustion gas is completely burned by heating it at 800 ° C. or more for 2 seconds or more, thereby more reliably preventing the generation of harmful substances such as dioxin. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a heat treatment apparatus provided with a dry distillation furnace of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dry distillation furnace 2 Secondary combustion chamber 3 Heat treatment furnace 4 Tertiary combustion chamber

Continuation of the front page (56) References JP-A-10-160141 (JP, A) JP-A-8-121728 (JP, A) JP-A-8-178237 (JP, A) JP-A-11-132423 (JP) JP-A-7-138669 (JP, A) JP-A-10-311515 (JP, A) JP-A-57-155287 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB Name) F23G 5/027 F23G 5/14-5/16 F23G 5/24 F23G 5/00

Claims (3)

(57) [Claims] 1. A carbonization furnace provided with an ignition burner for burning a fuel under a limited supply of primary air to generate a carbonization gas, and a carbonization gas supplied from the carbonization furnace is supplied under a secondary air supply. A secondary combustion chamber having a secondary burner to be burned, and a material to be processed are stacked and accommodated in a substantially vertical direction, and a combustion gas supplied from the secondary combustion chamber is introduced from below to heat-treat the material to be processed. line Utotomoni to form溶槽the bottom, heating
A vertical heat treatment furnace for discharging the combustion gas after the treatment from above, and a tertiary combustion chamber provided with a tertiary burner for completely burning the combustion gas discharged from the heat treatment furnace under the supply of tertiary air are provided. Heat treatment equipment equipped with a dry distillation furnace. 2. A heat treatment furnace, characterized in that so as to separate the metal such as aluminum from the waste 請
A heat treatment apparatus comprising the dry distillation furnace according to claim 1 . 3. A tertiary combustion chamber, the supplied combustion gas, according to claim 1, characterized in that so as to complete combustion by heat more than 2 seconds at 800 ° C. or more, or 2
A heat treatment apparatus comprising the dry distillation furnace according to the above.