JPH06193842A - Melting incinerator and melting incinerating method - Google Patents

Abstract

PURPOSE:To improve removing efficiency of soot dust in exhaust smoke by feeding the smoke in an incinerator body in zigzag manner along many dust removing baffle plates in a stack for the smoke and injecting atomized water from many fountain units. CONSTITUTION:Many stages of dust removing baffle plates 12 are vertically installed in a stack 11 for exhaust smoke of an incinerator body 10. Many stages of fountain units 13 are vertically installed at a suitable interval in the stack 11. Further, a drain unit 14 for receiving drain flowing down along the plates 12 is arranged. Exhaust smoke in the body 10 is raised in a zigzag manner along the plates 12 in the stack 11, and atomized water is injected from the units 13 on the way of raising. Thus, soot smoke and dust in the exhaust smoke are sucked by atomized water, and recovered as drain to the unit 14. On the other hand, the recovered rain is supplied from a drain tube 15 to a purifying tank 17 to be purified, and purified water is circulated from a feed water tube 15 to the units 13.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to the separation and extraction of iron and non-ferrous metals such as iron, copper, lead, zinc and aluminum, and the combustibility or chemical properties of styrofoam, vinyl chloride, paper, cardboard and the like. Smelting incinerator and smelting incineration direction to incinerate radioactive waste.

[0002]

2. Description of the Related Art As described above, a melting incinerator simultaneously processes a substance to be melted such as iron and a combustible or chemical waste such as Styrofoam, so that various dusts are emitted from the smoke stack. The soot contained therein will be discharged, and for this reason, it is necessary to increase the combustion efficiency in the furnace body as much as possible and to provide a dust collector that does not emit soot as much as possible from the furnace body.

As a conventional melting and incinerating furnace of this kind, as shown in FIG. 3, a flame supply hole 2 is provided in a side wall of a furnace body 1,
An air intake hole 3 is provided in the bottom portion thereof, a smoke collecting pipe 4 communicating with the furnace body 1 is provided adjacent to the furnace body 1, and a filter type dust collecting device 5 is provided to the smoke collecting chimney 6 through the filter type dust collecting device 5. It is designed to communicate. Regarding the structure that dissolves and extracts ferrous and non-ferrous metals in a melting incinerator and incinerates combustible waste,
Since this is a well-known technique, illustration is omitted.

[0004]

As described above, in the conventional melting and incinerating furnace of this kind, since the filter-type dust collecting apparatus 5 is installed adjacent to the furnace body 1, the entire apparatus is large in size. Therefore, there is a problem that the installation cost is increased and the total cost is increased.

Further, in the conventional melting and incinerating furnace of this kind, in order to improve the combustion efficiency as described above, it is considered only to supply a larger amount of fuel than the flame supply hole 2, so that the material to be melted such as iron is melted. A large amount of fuel is required to smelt and incinerate industrial waste such as flammable or foamed synthetic resin with a smelting incinerator, especially due to compression and explosion of gas generated from chemical waste during combustion. There was a problem that the furnace body 1 was damaged.

Therefore, according to the present invention, the above dust collector is made as small as possible and the dust collection efficiency is improved, the combustion efficiency is increased as much as possible, and the pressure in the furnace body 1 due to the gas generated from the chemical waste is increased. The purpose is to prevent rising and propose a safe smelting incinerator and its smelting incineration direction.

[0007]

In order to solve the above-mentioned problems, in claim 1 of the present invention, when the reference numerals shown in the embodiment are attached, the exhaust gas in the furnace body 10 A plurality of baffle plates 12 for dust removal are provided in the vertical direction in the exhaust chimney 11 for discharging, a fountain device 13 for ejecting pressure water is vertically installed in the chimney 11 at appropriate vertical intervals, and the baffle plate is Drain 14 that receives the drainage that flows down to 12
And a drainage pipe 16 communicating with the drain 14 and a drainage pipe 16 communicating with the drain 14 are connected via a septic tank 17.

According to the second aspect of the present invention, the flame supply and air supply holes 18 are provided at appropriate intervals in the circumferential direction of the furnace body 10, and the breathing holes 20 are provided in the lid 19 of the furnace body 10. The configuration is adopted.

In the third aspect, the breathing hole 2
No. 0 adopts the configuration according to claim 2 whose opening can be adjusted by the adjusting means 21.

Further, according to the present invention, the flame supply and air supply holes 18 are provided at appropriate intervals in the circumferential direction of the furnace body 10.
To inject a flame into the furnace body 10 to ignite the burned material in the furnace body 10, and after the ignition, switch the flame to compressed air and inject compressed air from the flame supply / air supply hole 18 A configuration is adopted in which a combustion airflow is generated in the furnace 10, and the pressure in the furnace body 10 is automatically adjusted by a breathing hole 20 provided in the furnace body 10.

[0011]

According to the first aspect of the present invention, the dust removing baffle plate 12 is provided while the smoke exhaust in the furnace body 10 passes through the smoke exhaust stack 11.
The pressure water that rises in a meandering shape by coming into contact with the meandering shape, and the pressure water ejected from the fountain device 13 in the meandering ascending shape becomes a shower shape or a curtain shape and is uniformly dispersed in the chimney 11. Is adsorbed, and this is collected as drainage flowing down through the dust removal baffle 12 and the like in the drain 14, and the drainage pipe 16 communicating with this is returned to the septic tank 17 in the drainage containing soot and dust. Soot and dust are separated from water by a high-performance filter or the like in the septic tank 17, and the clarified water is re-supplied to the fountain device 13 as pressurized water by the water supply pipe 15. Since the fountain device 13 is vertically stacked in the chimney 11, most of the soot and dust rising in a meandering manner inside the chimney 11 come into contact with the spray water of the fountain device 13 to capture particles. Will be done.

According to the second aspect, since the flame supply and air supply holes 18 are provided at appropriate intervals in the circumferential direction of the furnace main body 10, the flame is injected into the furnace main body 10 from this, and thereby the furnace main body 10 is injected. The industrial waste in 10 can be uniformly melted and incinerated, and the gas being burned by injecting compressed air into the furnace main body 10 through the flame supply and air supply holes 18 provided at appropriate intervals in the circumferential direction. Is uniformly distributed in the furnace body 10, and the combustion efficiency can be further improved by supplying oxygen.

When the pressure in the furnace body 10 rises above the set pressure, an abnormal pressure is released from the breathing hole 20. When the pressure in the furnace body 10 falls below the set pressure, the breathing hole 20 is released. External air can be introduced into the furnace body 10 from 20 to maintain a predetermined set pressure inside the furnace body 10 at all times.

According to a third aspect, the breathing hole 20.
Since its opening degree can be adjusted by the adjusting means 21, the set pressure in the furnace body 10 changes depending on the type and amount of burned material in the furnace body 10 or the thermal power, or changes with time. Breathing hole 2 according to this
The opening degree of 0 can be adjusted.

According to a fourth aspect of the present invention, the flame-injection / air-supply holes 19 provided at appropriate intervals in the circumferential direction of the furnace body 10 are used to inject flame into the furnace body 10 to burn the burned material in the furnace body 10. After the ignition, the flame is switched to compressed air after the ignition, and the compressed air is injected from the flame supply / air supply hole 19 to generate a combustion air flow in the furnace body 10 to improve the combustion efficiency in the furnace body 10. If the pressure in the furnace body 10 becomes abnormally higher than the set pressure or becomes lower than the set pressure, the breathing hole 20 adjusts itself to bring the pressure in the furnace body 10 to the outside. The pressure inside the furnace body 10 is maintained constant by releasing or sucking the outside air into the furnace body 10 to prevent the abnormal high pressure phenomenon due to the gas generated from the chemical waste in particular. Effective occurrence of explosion due to abnormal pressure at It can be prevented.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention, in which side walls of a furnace main body 10 are provided with flame supply / air supply holes 18 at appropriate intervals in the circumferential direction thereof, and at the bottom thereof. Conventionally, the air intake hole 22 required for combustion is opened,
A breathing hole 20 is opened in the lid 19 on the upper part of the furnace body 10, and an adjusting means 21 for adjusting the opening degree of the breathing hole 20 is provided therein.
Is provided. In this adjusting means 21, for example, as shown in the figure, a slide plate 21a that slides in the direction of the arrow along the lid 19 is provided with a hole 21b that can overlap with the breathing hole 20 and the degree of polymerization between the breathing hole 20 and the hole 21b. The opening degree is adjusted by changing. Breathing hole 2
According to the result of the experiment, the inner diameter of 0 is preferably about 1/100 of the inner diameter of the furnace body 10. If the inner diameter is larger than this, flame will be discharged from the breathing hole 20, and if the inner diameter is smaller than this, sufficient breathing action cannot be exhibited.

A smoke stack 1 extending from the side wall of the furnace body 10.
In the inside of 1, a large number of baffles for dust removal 1 arranged in an inclined shape
The unit 2 is provided in a plurality of upper and lower stages, and a fountain device 13 and a drain 14 are provided for each unit. As shown in FIG. 2, for example, the water spouting device 13 has a pipe 23 attached in an annular shape along the inner wall of the smoke exhaust chimney 11, and the ejection holes 23a are formed in the annular inner periphery of the pipe 23 at appropriate intervals. Is.

The fountain device 13 is connected by a water supply pipe 15 to a septic tank 17 via a water supply pump 24, and the drain 14 is also connected by a drain pipe 16 to the septic tank 17. A water supply pipe 15 is connected to a supply pipe 25 with a valve in the middle of the water supply pipe 15, and water is supplied from the supply pipe 25 in accordance with evaporation of water. In addition, the flue pipe 2 is appropriately installed in the smoke stack
6 is joined to the upper side of the exhaust pipe, and the wind from the blower pipe 26 is ejected upward into the smoke exhaust chimney 11 as shown by an arrow so that the exhaust gas in the smoke exhaust chimney 11 is discharged to the outside. It is designed to help exhaust.

The embodiment of the present invention has the above-described structure. To use this, industrial waste such as iron, non-ferrous metal, synthetic resin, and paper is put into the furnace body 10 to supply flame and also as air. A flame is ejected from the supply hole 18 into the furnace body 10 to ignite the industrial waste while taking in the combustion air from the air intake hole 22, and the supply of the flame is stopped when the ignition distribution is sufficiently distributed. To supply compressed air, and by injecting the compressed air into the furnace body 10 to generate a combustion airflow in the furnace body 10 to increase combustion efficiency, and to generate chemical waste during combustion in the furnace body 10. When the inside of the furnace body 10 becomes higher than the set pressure due to the generation of gas from the inside, the pressure inside the furnace body 10 is automatically released from the breathing hole 20 and the explosion phenomenon inside the furnace body 10 due to the high pressure gas. To prevent
This allows safe and efficient combustion in the furnace body 10.

Exhaust gas generated by combustion comes into contact with a dust removing baffle plate 12 provided in a stack in a smoke exhaust chimney 11 and ascends in a meandering manner. The particles of soot and dust contained in the exhaust gas are adsorbed upon contact with the exhaust gas, and the wastewater adsorbed by the particles flows down through the dust removing baffle plate 12 and the like, and is collected in the drain 14. The drainage collected in the drain 14 is collected in the septic tank 17 by the drainage pipe 16. Since the above-described fountain device 13 and the dust removing baffle plate 12 are arranged in multiple stages in the smoke exhaust chimney 11 and are ejected in a shower shape or a curtain shape, the exhaust gas is still exhaust gas chimney 11 Since the inside of the exhaust gas rises in a meandering manner, most of the soot and dust contained in the exhaust gas are contained in the waste water and collected, so that the dust removal efficiency can be markedly increased, and the smoke exhaust chimney 11 Soot is rarely emitted from the.

The waste water collected in the septic tank 17 is purified and then supplied again to the fountain device 13 by the water supply pump 24 as refining pressure water. By reusing the waste water in this way, the water consumption can also be reduced.

[0022]

EFFECTS OF THE INVENTION According to claim 1 of the present invention, the soot and dust particles contained in the flue gas in the furnace body passing through the flue gas stack are efficiently used for the spray water ejected by the fountain device. Is adsorbed as a wastewater, and this is collected as wastewater, so that the dust removal efficiency can be remarkably improved.

Moreover, since the dust removal mechanism is provided inside the smoke exhaust chimney, it is only necessary to provide a septic tank outside the furnace main body, and therefore the installation area of the entire smelting incinerator is significantly reduced. Therefore, the total cost can be significantly reduced.

Further, since the wastewater containing soot and dust in the smoke exhaust chimney is collected in the septic tank and is supplied again to the fountain device as clear water, the water consumption is small and from this aspect. Also, the cost for dust removal can be reduced.

According to the second aspect, the industrial waste in the furnace body can be uniformly and efficiently melted and incinerated, and the consumption of combustion oil is small, which contributes to the reduction of fuel consumption. it can.

Further, since the set pressure in the furnace body is set by simply providing the breathing hole in the lid body of the furnace body, the structure is simple and there are few failures and it is practical.

Further, according to claim 3, since the opening of the breathing hole can be adjusted by the adjusting means,
When the set pressure in the furnace body changes or changes over time depending on the type and amount of burned material in the furnace body or the thermal power, the opening of the breathing hole can be adjusted accordingly. , It is so versatile.

Further, according to claim 4, by generating a combustion air flow in the furnace body, the combustion efficiency in the furnace body is improved to contribute to the reduction of fuel consumption, and the pressure in the furnace body is kept constant. Especially, it is possible to prevent abnormal high pressure phenomenon due to gas generated from chemical waste, effectively prevent the occurrence of explosion due to abnormal pressure of gas in the furnace body, and extend the life of the furnace body significantly. You can

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of the main part.

FIG. 3 is a vertical sectional front view of a conventional technique.

[Explanation of symbols]

 10 furnace body 11 smoke exhaust chimney 12 dust removing baffle plate 13 fountain device 14 drain 15 water supply pipe 16 drainage pipe 17 septic tank 18 flame supply and air supply hole 19 lid 20 breathing hole 21 adjusting means

Claims (4)

[Claims] 1. A fountain for ejecting pressure water at an appropriate vertical interval in the chimney while a plurality of baffles for dust removal are provided in a vertical direction in a chimney for exhausting the smoke emitted from the furnace body. Dissolution by attaching a device and arranging a drain for receiving drainage that flows down to the baffle plate and connecting a water supply pipe communicating with the fountain device and a drain pipe communicating with the drain through a septic tank Incinerator. 2. A smelting incinerator in which a flame-supplying and air-supplying hole is provided at appropriate intervals in the circumferential direction of the furnace body, and a breathing hole is provided in the lid of the furnace body. 3. The melting incinerator according to claim 2, wherein the opening of the breathing hole can be adjusted by an adjusting means. 4. A flame-injecting and air-supplying hole provided at appropriate intervals in the circumferential direction of the furnace body to inject a flame into the furnace body to ignite a burned material in the furnace body, and after the ignition, compress from the flame. By switching to air and injecting compressed air from the flame-supplying / air-supplying hole to generate a combustion air flow in the furnace body, and adjusting the pressure in the furnace body by a breathing hole provided in the furnace body. Melting and incineration method.