JPH11287416A - Kiln type gasification incinerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a kiln type gasification incinerator to suppress the generation of dioxin, reduce its size, and effect incineration by energy reduced as much as possible. SOLUTION: This incinerator comprises an approximate closed type rotary kiln 1 being a gasification carbonizing chamber for an incinerated substance; an outer cylinder part 3 forming a space 2 for heating of the rotary kiln 1 at the outside of the rotary kiln 1; a lower incineration chamber 5 arranged at the lower part of the outer cylinder part 3 and having a heating/combustion device 4; and an exhaust gas supply mechanism 9 to guide gas, generated in the rotary kiln 1, from the rotary kiln 1 to a lower incineration chamber 5 for air supply. A ventilation capable container 6 through which exhaust gas from the lower incineration chamber 5 flows in the space for heating is arranged between the outer cylinder part 3 and the lower incineration chamber 5 and the ventilation capable container 6 is filled with lamps of grain-form heating media C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an externally heated kiln-type gasification incinerator for heating, drying, gasifying and carbonizing incinerated materials, particularly sludge.

[0002]

2. Description of the Related Art Waste disposal of municipal garbage and sewage sludge is mainly incinerated because ocean dumping is prohibited. However, these have a high moisture content, and in particular, since sludge contains 80% or more of moisture (dewatered sludge), there is a problem that combustion is difficult and energy consumption for incineration is large.

[0003] Conventionally, sludge incinerators that heat sludge or the like to gasify and carbonize the sludge, for example, kiln-type gasification incinerators equipped with an external combustion type rotary kiln have been proposed. The kiln-type gasification incinerator is heated and gasified while sludge is continuously introduced into a rotary kiln, which is a tube that is heated and rotated from the outside, and moves from an input port to a discharge port due to the inclination of the rotary kiln. In addition to being carbonized, the generated gas is ejected from the rotary kiln and combustible components are burned, which also becomes a heat source during operation.

In this kiln-type gasification incinerator, gas generated when sludge is gasified is used as a part of a heat source, so that energy consumption can be relatively suppressed, and sludge is converted into charcoal and reduced. For example, there is an advantage that it can be effectively used as fuel, soil improvement material, horticultural soil, and the like.

[0005]

However, the conventional incinerator has the following problems. In other words, in recent years, in order to suppress the generation of dioxins and the like, which are toxic and have an adverse effect on the human body and the environment, the content of trace harmful substances such as dioxins in fly ash (so-called fly ash) generated by incineration of waste is suppressed. Need to be done.
For this reason, in an incinerator, in order to suppress the generation of dioxin and chlorine contributing to the generation by satisfactorily thermally decomposing the same, it is necessary to heat while maintaining a high temperature state of a certain level or more, for example, 850 ° C. for 2 seconds or more. I have. In conventional incinerators,
In order to heat while maintaining the high temperature state, it is necessary to secure a free combustion chamber according to the air volume, and it is necessary to attach a device for collecting and removing fly ash from the exhaust gas, and the equipment becomes larger. In addition, there is a problem that energy consumption increases to obtain stronger heating.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a kiln-type gasification incinerator that can suppress the generation of dioxin and the like, can be reduced in size, and can incinerate with as little energy as possible. .

[0007]

The present invention has the following features to attain the object mentioned above. That is, in the kiln-type gasification incinerator according to claim 1, a substantially closed rotary kiln that is a gasification and carbonization chamber for incinerated material, an outer cylinder portion that forms a rotary kiln heating space outside the rotary kiln, An incinerator comprising: a lower incineration chamber provided at a lower portion of an outer cylinder portion and having a heating / combustion device; and an exhaust gas supply mechanism that guides gas generated in the rotary kiln from the rotary kiln into the lower incineration chamber and blows the gas. A gas-permeable container through which the exhaust gas from the lower incineration chamber can flow through the heating space is provided between the outer cylinder and the lower incineration chamber. A technique in which the medium is filled is employed.

In this kiln type gasification incinerator, a gas permeable container through which the exhaust gas from the lower incineration chamber can flow to the heating space is provided between the outer cylinder and the lower incineration chamber. Is filled with the bulk heating medium, the heat of combustion in the lower incinerator and the high-temperature exhaust also bring the bulk heating medium in the air-permeable container to a high temperature state, and the radiant heat from the bulk heating medium causes The rotary kiln and the inside and outside thereof are further heated, so that a higher temperature state can be maintained. Furthermore, since the gas generated in the rotary kiln is provided with an exhaust gas supply mechanism that guides and blows the gas from the rotary kiln into the lower incineration chamber, the gas containing fly ash is sent into the lower incineration chamber and burned again. When passing through the air-permeable container from the incineration chamber, the lump heating medium acts as a filter and can adsorb and capture the remaining fly ash. Then, the captured fly ash and the contained dioxin and the like are burned and thermally decomposed again in the high-temperature mass-granular heating medium. Note that a deodorizing effect also occurs when the gas flows through the massive heating medium.

In the kiln-type gasification incinerator according to the second aspect, in the kiln-type gasification incinerator according to the first aspect, the exhaust gas supply mechanism discharges the gas from the rotary kiln and reduces the pressure inside the rotary kiln. A technology having a decompression means is employed.

[0010] In this kiln type gasification incinerator, the exhaust gas supply mechanism is provided with decompression means for discharging gas from the rotary kiln and reducing the pressure in the rotary kiln. Sensible heat energy for evaporating water can be reduced.

According to a third aspect of the present invention, there is provided the kiln-type gasification incinerator according to the first or second aspect, further comprising a carbide discharge mechanism for discharging the dry carbide in the rotary kiln from the rotary kiln. The discharge mechanism employs a technology including a carbide introducing means for introducing the discharged dry carbide into the lower incineration chamber.

[0012] In this kiln-type gasification incinerator, the carbide discharge mechanism is provided with a carbide introduction means for introducing the discharged dry carbide into the lower incinerator, so that the dry carbide can be effectively used as fuel and energy consumption can be reduced. Is done.

According to a fourth aspect of the present invention, in the kiln-type gasification incinerator according to the third aspect, the lower incineration chamber is formed in a vertical, substantially cylindrical shape, and the exhaust gas supply mechanism is provided. In addition, a technology is provided that has an air vent provided on the inner peripheral surface of the lower incineration chamber to blow out the gas in a tangential direction of the inner peripheral wall of the lower incineration chamber.

[0014] In this kiln-type gasification incinerator, the exhaust gas supply mechanism is provided on the inner peripheral surface of the lower incinerator with an air outlet for blowing gas in a tangential direction of the inner peripheral wall of the lower incinerator. Therefore, a cyclone effect in which a vortex that rotates in one direction along the inner circumferential direction of the lower incineration chamber is generated by the exhaust gas ejected from the blower port, and fly ash contained in the exhaust gas and drying introduced into the lower incineration chamber The carbides stay in the air for a long time while being swirled inside by the vortex, and are subjected to combustion.

In the kiln-type gasification incinerator according to a fifth aspect, in the kiln-type gasification incinerator according to the fourth aspect, the carbide introducing means is provided near the upper outer periphery of the lower incineration chamber and near the blowing port. A technology having an inlet for the dry carbide in the front direction is adopted.

In this kiln-type gasification incinerator, the carbide introduction means has an inlet for the dry carbide in the vicinity of the upper periphery of the lower incineration chamber and forward of the blowing direction near the blower port. The dry carbide introduced into the chamber merges with the exhaust gas spouting from the blow port and is mixed and burned at the wind speed.

In the kiln-type gasification incinerator according to claim 6, in the kiln-type gasification incinerator according to claim 1, the outer cylinder portion is provided with a gas-permeable peripheral wall portion at a part of an outer peripheral portion thereof, On the outside of the permeable peripheral wall portion, an exhaust gas purification container filled with a lump heating medium is provided, with the permeable peripheral wall portion as a part, and the exhaust gas purification container includes exhaust gas from the heating space. A technology is provided in which an exhaust port is provided for exhausting the gas by passing through the mass heating medium.

In this kiln-type gasification incinerator, the exhaust gas purifying vessel is provided with an exhaust port for exhausting the exhaust gas from the heating space through the mass heating medium, so that fly ash in the exhaust gas is reduced. While being captured by the filter effect of the bulk heating medium in the purification container, the exhaust gas passing therethrough is deodorized and absorbed heat.

[0019] In the kiln-type gasification incinerator according to claim 7, in the kiln-type gasification incinerator according to claim 6, the exhaust gas purifying container and the gas permeable container are formed of a granular material in the exhaust gas purifying container. A technique connected by a conduit for transferring a heating medium into a gas-permeable container is employed.

In this kiln type gasification incinerator, the exhaust gas purifying container and the gas permeable container are connected by a pipe for transferring the bulk heating medium in the gas exhaust gas purifying container into the gas permeable container. By transferring the lump-shaped heating medium having captured fly ash in the exhaust gas purifying vessel to the air-permeable container through the pipe, the lump-shaped heating medium can be supplied, and the lump-shaped heating medium is heated. As a result, the captured fly ash can be burned.

[0021] In the kiln-type gasification incinerator according to claim 8, in the kiln-type gasification incinerator according to any one of claims 1 to 7, a technique is employed in which the massive heating medium is carbide or coke. Is done.

In this kiln-type gasification incinerator, since the lump heating medium is a carbide or coke, a high effect is obtained in fly ash capture and radiant heat, particularly in deodorizing effect, and combustion can be assisted as fuel. . In addition, you may process the dry carbide obtained by carbonizing into a lump-shaped granular heating medium, and may reuse it.

According to a ninth aspect of the present invention, in the kiln-type gasification incinerator according to any one of the first to seventh aspects, the massive heating medium has a porous shape,
A technology that has a hollow cylindrical shape or a coil spring shape and is a ceramic or a ceramic-based metal catalyst is employed.

In this kiln-type gasification incinerator, since the bulk heating medium has a porous shape, a hollow cylindrical shape or a coil spring shape and is a ceramic or a ceramic-based metal catalyst, there are many small gaps. It is suitable as a filter for catching fly ash and is also excellent as a source of radiant heat at high temperatures.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a kiln type gasification incinerator according to the present invention will be described below with reference to FIGS. In these figures, reference numeral 1 denotes a rotary kiln, 2 denotes a heating space, 3 denotes an outer cylinder, 4 denotes a heating / combustion device, 5 denotes a lower incineration chamber, and 6 denotes a gas-permeable container.

The kiln-type gasification incinerator of this embodiment is a gasification incinerator employing an external heat rotary kiln that heats, dries, gasifies and carbonizes sewage sludge as incineration. As shown in FIG. 1, a substantially cylindrical rotary kiln 1 that is a gasification and carbonization chamber for sludge, a substantially cylindrical outer cylinder portion 3 that forms a heating space 2 of the rotary kiln 1 outside the rotary kiln 1, Lower incinerator 5 disposed below outer cylinder 3 and having heating / combustion device 4
A gas permeable container 6 is provided between the outer cylinder part 3 and the lower incineration chamber 5 so that the exhaust gas from the lower incineration chamber 5 can flow through the heating space 2.

In the kiln type gas incinerator, the sludge charging mechanism 7 for charging sludge into the rotating rotary kiln 1, the kiln rotating mechanism 8 for rotating the rotary kiln 1 at a predetermined speed, and the gas generated in the rotary kiln 1. An exhaust gas supply mechanism 9 that guides gas from the rotary kiln 1 into the lower incineration chamber 5 and sends the gas to the lower incineration chamber 5, and a carbide discharge mechanism 10 that discharges dry carbide in the rotary kiln 1 from the rotary kiln 1.

The sludge input mechanism 7 includes a sludge hopper 11 storing sewage sludge (dewatered sludge) and a sludge hopper 1.
An airtight sludge feeder 12 provided at the lower part of the sludge hopper 11 for airtightly feeding the sludge in the sludge hopper 11 into the rotary kiln 1.
And The sludge input machine 12 is provided with the input motor 1
The rotary screw 3 is provided with a screw 14 for injection, and the screw 14 for injection is provided at an outlet below the sludge hopper 11, and the sludge inlet 1b of the shaft 1a formed at one end of the rotary kiln 1. Through a rotary joint 15.

The rotary kiln 1 is made of heat-resistant steel, Hastelloy, or the like, and is rotatable at one end and the other end of the outer cylindrical portion 3 by a rotating ring 16 and a roller 17. It is supported with sex. And rotary kiln 1
Is the inclination angle θ with the sludge inlet 1b facing upward, 0 ° <θ
It is of a tiltable type (downward to the right in FIG. 1) whose axis can be tilted within the range of <7 °.

The roller 17 supports one end only in the radial direction and the other end in the radial and thrust directions in order to absorb the elongation of the rotary kiln 1 due to heat. Further, the rotary kiln 1 has a lid 1c on the other end side separated from the rotary kiln 1, and is connected to the outer cylinder 3 by a fixing bracket 1d to form a fixed wall.

[0031] The kiln rotating mechanism 8 includes a sprocket 1 coaxially fixed to the outer periphery of the shaft 1a of the rotary kiln 1.
9 and a kiln rotating motor 21 in which a chain 20 wound around the sprocket 19 is wound around a rotating shaft. The lower incineration chamber 5 is formed in a vertical, substantially cylindrical shape with a refractory heat insulating material, and is provided with an ash discharge port 5a having a closed structure from which ash can be taken out, and a screen above the ash discharge port 5a. 22 are formed.

The heating / combustion device 4 includes an LPG source 23 used for pilot, an LNG source 24 used for initial heating and high-temperature combustion, and an LNG source 24 connected to these components near the upper part of the screen 22 of the lower incineration chamber 5. Combustible gas supply pipe 25 provided with LPG and LNG supply ports 25a
And The air permeable container 6 is disposed at the lower end on the other end side of the outer cylinder portion 3 and has a bottom wall 6a serving as a gas permeable screen.
Is filled.

The outer cylindrical portion 3 is formed of a fire-resistant heat insulating material, and has a permeable peripheral wall portion 3a formed in a part of an outer peripheral portion thereof. As shown in FIG.
As shown in FIG. 5, an exhaust gas purifying container 26 partially filled with coke C is provided with the gas permeable peripheral wall portion 3a, and the exhaust gas from the heating space 2 is filled with coke C in the exhaust gas purifying container 26. An exhaust port 26a for passing and exhausting air is provided. The exhaust port 26a is connected to a suction blower (not shown).

A charging bucket elevator 27 is connected to the exhaust gas purifying container 26 to convey and supply coke C therein. The exhaust gas purifying container 26 and the gas permeable container 6 are connected by an upper and lower connecting pipe (pipe) 28 for transferring the coke C in the gas exhaust gas purifying container 26 into the gas permeable container 6.

The upper and lower connecting pipes 28 are provided along the outer periphery of the outer cylindrical portion 3 and have a pipe portion 29 protruding above the gas permeable container 6 at a lower portion thereof. It has become. The pipe portion 29 is provided with a transfer amount adjusting mechanism 30. The transfer amount adjusting mechanism 30 includes a take-out screw 30a arranged in the pipe portion 29,
An adjusting motor 30b having the take-out screw 30a as a rotation axis.

That is, the transfer amount adjusting mechanism 30 controls the proper amount of coke C by rotating the take-out screw 30a.
Is sent into the air permeable container 6. The take-out screw 30a is set to have a smaller diameter than the inner diameter of the pipe portion 29 to such an extent that coke C can be prevented from being caught. In addition, on the lower side surface of the outer cylindrical portion 3,
A blower pipe 32 from an air blower 31 is provided in a penetrating state to supply air to the heating space 2.

The exhaust gas supply mechanism 9 has a suction pipe 33 penetrating through the lid 1c, sucks the exhaust gas in the rotary kiln 1 and sets the inside of the rotary kiln 1 to a predetermined reduced pressure state. The exhaust connection pipe 3 connected to the exhaust blower 34 and connected to a blow port 5b formed in the lower incineration chamber 5 via a blower (not shown).
5 is provided. The air outlet 5b is provided on the inner peripheral surface of the lower incinerator 5 and is formed so as to blow out gas in a tangential direction of the inner peripheral wall of the lower incinerator 5.

As shown in FIGS. 1 and 3, the carbide discharge mechanism 10 has a discharge container 36 which penetrates the lid 1c in a gas-tight manner and has a horizontal cross-sectional wedge shape. A cutting screw 37 arranged to cut out the dried carbide to the outside, a discharging motor 38 provided with the cutting screw 37 on a rotating shaft, and rotating the same, and a discharging container 36 together with the discharging motor 38 is moved in the penetrating direction. And a cylinder 39 for causing the cylinder 39 to operate.

The cylinder 39 is fixed on a support 40 provided at the upper part of the lower incineration chamber 5 on the side of the lid 1c. The support 40 has a carbide outlet 40a for taking out dry carbide, A carbide inlet 40b for introducing carbide into the lower incineration chamber 5 is formed. The carbide inlet 40b is disposed in the vicinity of the upper periphery of the lower incineration chamber 5 and in the vicinity of the air outlet 5b in the forward direction in the ejection direction.

The discharge container 36 has a discharge hole 36a formed in the lower portion on the base end side. The discharge hole 36a is located immediately above the carbide inlet 40b and the carbide outlet 40a by the movement of the cylinder 39 in this order. It is arranged to be. That is, the discharge container 36 is located at these positions.
The dried carbide cut by the cutting screw 37 can be dropped to the carbide inlet 40b or the carbide outlet 40a.

Next, a method for incinerating sludge (dewatered sludge) by the kiln type gas incinerator according to the present invention will be described below.

First, in the lower incineration chamber 5, a flammable gas of LPG or LNG is supplied and burned by the heating / combustion device 4, and the heating space 2 and the rotary kiln 1 are heated via the gas permeable container 6. You. That is, the lower incineration chamber 5 becomes a primary combustion chamber, and the heating space 2 becomes a secondary combustion chamber in which combustion is performed by a combustible component such as generated gas.

The exhaust blower 34 of the exhaust gas supply mechanism 9
Thereby, the inside of the rotary kiln 1 is reduced in pressure. Further, by driving the kiln rotating motor 21 of the kiln rotating mechanism 8, the rotary kiln 1 is rotated at a predetermined speed via the chain 20 and the sprocket 19. At the time of the initial heating, the discharge container 36 and the cutting screw 3 are
7 is set to a position where it projects most outward from the lid 1c, that is, a state in which the amount of projection into the outer cylinder 3 is minimum.

In this state, the sludge thrower 12 of the sludge throwing mechanism 7 is driven to throw sludge in the sludge hopper 11 into the rotary kiln 1 from the sludge inlet 1b. That is, the sludge is scraped out by the charging screw 14 which is driven to rotate by the charging motor 13, and is air-tightly pumped from the sludge inlet 1b. The introduced sludge gradually goes down in the rotating high-temperature rotary kiln 1, that is, the lid 1.
While moving to the c side, it is dried, gasified, and carbonized by heating.

At this time, the generated gas is sucked by the exhaust blower 34 of the exhaust gas supply mechanism 9 and mixed with the air through the exhaust connection pipe 35 to be connected to the inner peripheral tangential line from the air outlet 5 b of the lower incineration chamber 5. And is burned in the lower incinerator 5 together with the fly ash contained therein. The fly ash melted in the lower incinerator 5 is converted into slag as ash outlet 5a.
Taken out of

On the other hand, the cylinder 3 of the carbide discharging mechanism 10
9 to dispose the discharge hole 36a of the discharge container 36 directly above the carbide input port 40b,
To rotate the cutting screw 37 in a direction in which the dried carbide is scraped out.

At this time, by rotating the rotary kiln 1 in the direction of the arrow shown in FIG. 3, the dry carbide enters the discharge container 36 by rotation, and the discharge of the dry carbide is facilitated. The cut dry carbide is introduced into the lower incineration chamber 5 through the carbide inlet 40b, mixed with the exhaust gas and air blown out from the blower opening 5b, and supplied to the combustion in a vortex state.

That is, the cutting screw 37, the discharging motor 38, the cylinder 39 and the carbide inlet 4
Ob also functions as a carbide introducing means for introducing the dry carbide into the lower incineration chamber 5.

The exhaust gas provided for combustion in the lower incinerator 5 is
The rotary kiln 1 is heated while passing through the coke C of the gas permeable container 6 and flowing into the heating space 2, and the remaining combustible components are provided for combustion. The fly ash that has not been burned in the lower incinerator 5 is trapped when the exhaust gas passes through the coke C, is heated and melted in the coke C, and dioxin and the like in the fly ash are heated by the heat of the coke C. Is thermally decomposed.

As described above, in the heating space 2, the gasified combustible components contribute to combustion, and the high temperature state is maintained by the radiant heat of the coke C in the heated gas-permeable container 6. The circulated exhaust gas passes through the coke C in the exhaust gas purifying container 26 from the permeable peripheral wall portion 3a and is discharged from the exhaust port 26a. At this time, the fly ash is captured in the coke C, and the exhaust gas is discharged while being deodorized and cooled.

The atmosphere temperature in each space is about 900 ° C. to 1200 ° C. in the lower incineration chamber 5 and about 850 ° C. in the coke C in the gas permeable container 6. In the heating space 2, the temperature is 600 ° C. to 700 ° C.
° C, and in the rotary kiln 1,
The temperature is set to about 450 ° C. to about 450 ° C. Then, the temperature of the coke C of the exhaust gas purifying container 26 is about 300 ° C., and finally the exhaust port 26 a is cooled from 150 ° C. to about 200 ° C.

In this kiln type gasification incinerator, the outer cylinder 3
A gas permeable container 6 through which the exhaust gas from the lower incineration chamber 5 can flow through the heating space 2 is provided between the lower incineration chamber 5 and the lower incineration chamber 5. The air permeable container 6 is filled with coke C. Therefore, the heat of combustion in the lower incineration chamber 5 and the exhaust in the high-temperature state also bring the coke C in the permeable container 6 into a high-temperature state, and the radiant heat from the coke C further heats the rotary kiln 1 and the inside and outside thereof, thereby increasing the temperature. Can be maintained.

Further, since there is provided an exhaust gas supply mechanism 9 for guiding the gas generated in the rotary kiln 1 from the rotary kiln 1 into the lower incineration chamber 5 and blowing it, the gas containing fly ash is sent into the lower incineration chamber 5. And burned again at a high temperature.
When passing through, the coke C acts as a filter and can capture the remaining fly ash.

Then, the captured fly ash is burned and melted again in coke C in a high temperature state. Note that a deodorizing effect also occurs when the gas flows through the coke C. That is, while efficiently raising the temperature by radiant heat from coke C, performing good thermal decomposition of dioxin, chlorine, and the like in the captured fly ash, and generating and reusing the generated gas as combustion energy. Fly ash can be burned and captured.

Further, since the exhaust gas supply mechanism 9 is provided with the exhaust blower 34 for discharging gas from the rotary kiln 1 and for reducing the pressure inside the rotary kiln 1, the incineration is performed under reduced pressure to evaporate the moisture of the incinerated material. It is possible to reduce the energy of the sensible heat for the heat generation.

Further, the carbide discharging mechanism 10 introduces a cylinder 39 for introducing the discharged dried carbide into the lower incineration chamber 5.
And the discharge container 36 and the like, it is possible to effectively use dry carbide as fuel, to reduce energy consumption, and to significantly reduce emissions from the incinerator.

The exhaust gas supply mechanism 9 is provided with an air outlet 5b provided on the inner peripheral surface of the lower incineration chamber 5 to blow out gas in the tangential direction of the inner peripheral wall of the lower incineration chamber 5. The exhaust gas blown out from the blower opening 5b produces a cyclone effect in which a vortex that rotates in one direction along the inner circumferential direction of the lower incineration chamber 5 is obtained, and is introduced into fly ash contained in the exhaust gas and the lower incineration chamber 5. The dried carbide is subjected to combustion while swirling inside by the vortex. At this time, the time for which these stay in the air is long, and sufficient and efficient combustion can be performed.

Further, in the vicinity of the upper outer periphery of the lower incineration chamber 5 and in the vicinity of the blowing port 5b, a carbide inlet 40b
Therefore, the dry carbide introduced into the lower incineration chamber 5 from the carbide introduction port 40b merges with the exhaust gas spouted from the blowing port 5b and is mixed and burned at the wind speed.

Further, since the exhaust gas purifying container 26 is provided with an exhaust port 26a for exhausting the exhaust gas from the heating space 2 through the coke C, the fly ash contained in the exhaust gas is discharged from the exhaust gas purifying container 26. While being captured by the filter effect of coke C, the exhaust gas is deodorized and absorbed heat, purified, deodorized, cooled, and discharged from the exhaust port.

The exhaust gas purifying container 26 and the gas permeable container 6 are connected by the upper and lower connecting pipes 28 for transferring the coke C in the gas exhaust gas purifying container 26 into the gas permeable container 6. The coke C, in which the fly ash is captured in the container 26, is transferred into the gas permeable container 6 through the upper and lower connecting pipes 28, thereby replenishing the gas permeable container 6 with the coke C and heating the coke C to capture the fly ash. Can be melted.

Since coke C is used as the lump heating medium, high effects are obtained in fly ash capture and radiant heat, particularly in deodorizing effect, and combustion can be assisted as fuel.

The present invention also includes the following embodiments.

(1) Although coke C is used as the bulk heating medium, another bulk heating medium may be used. For example,
By using a ceramic or ceramic-based metal catalyst having a porous shape, a hollow cylindrical shape, or a coil spring shape as a lump heating medium, many small gaps existing in these are suitable as a filter for catching fly ash. In addition, it is possible to obtain an excellent effect as a source of radiant heat in a high temperature state.

(2) Although sewage sludge is used as the incineration material, it may be used for other incineration materials. For example, city garbage and the like may be incinerated.

(3) The exhaust gas discharged from the exhaust port 26a is sufficiently purified by deodorization and capture of fly ash, etc. However, a purification device such as a dust collector may be connected to the exhaust port 26a. .

[0066]

According to the present invention, the following effects can be obtained. (1) According to the kiln-type gasification incinerator according to claim 1,
Between the outer cylinder and the lower incineration chamber, a gas permeable container through which the exhaust gas of the lower incineration chamber can flow to the heating space is provided, and the gas permeable heating medium is filled in the gas permeable container. Therefore, while efficiently raising the temperature by radiant heat from the lump heating medium, perform good thermal decomposition of dioxin, chlorine, etc. in the captured fly ash, and reuse the generated gas as combustion energy The fly ash contained can be burned and captured. In other words, a separate facility for burning fly ash is not required, so that downsizing can be achieved, energy consumption is reduced, and running costs can be significantly reduced.

(2) According to the kiln-type gasification incinerator according to the second aspect, the exhaust gas supply mechanism is provided with the pressure reducing means for discharging the gas from the rotary kiln and for reducing the pressure in the rotary kiln, so that the water evaporation is performed. And the gasification and carbonization can be performed with high efficiency.

(3) According to the kiln-type gasification incinerator according to the third aspect, since the carbide discharge mechanism includes the carbide introduction means for introducing the discharged dry carbide into the lower incineration chamber, the dry carbide is used as fuel. Can be used effectively, energy consumption can be reduced, and emissions from incinerators can be significantly reduced.

(4) According to the kiln type gasification incinerator according to the fourth aspect, the exhaust gas supply mechanism is provided on the inner peripheral surface of the lower incineration chamber and directs the gas in the tangential direction of the inner peripheral wall of the lower incineration chamber. Since the blower outlet is provided, the fly ash contained in the exhaust gas and the dry carbide introduced into the lower incineration chamber can be swirled inside by the cyclone effect to burn sufficiently and efficiently.

(5) According to the kiln-type gasification incinerator according to the fifth aspect, the carbide introducing means is provided with an inlet for the dry carbide in front of the blowing direction near the upper outer periphery of the lower incineration chamber and near the blowing port. Therefore, the dry carbide introduced into the lower incineration chamber from the inlet can be combined with the exhaust gas ejected from the blower, and can be effectively mixed and burned at the wind speed.

(6) According to the kiln type gasification incinerator according to the sixth aspect, the exhaust gas purifying container is provided with an exhaust port for exhausting the exhaust gas from the heating space through the massive heating medium. Therefore, the fly ash in the exhaust gas can be captured by the lump heating medium, and the passing exhaust gas can be deodorized and absorbed, purified, deodorized, cooled, and discharged from the exhaust port.

(7) According to the kiln-type gasification incinerator according to the seventh aspect, the exhaust gas purifying container and the gas permeable container transfer the bulk heating medium in the exhaust gas purifying container into the gas permeable container. Since the pipes are connected by a pipe, the block-shaped heating medium that has captured fly ash in the exhaust gas purifying vessel is transferred into the gas-permeable container through the pipe, so that the block-shaped heating medium can be supplied. In addition, it is possible to burn the trapped fly ash by heating the massive heating medium. That is, the dioxin and the like in the fly ash can be thermally decomposed at a high temperature, and there is no need to take out the lump-shaped heating medium that has captured the fly ash and treat it separately.

(8) According to the kiln-type gasification incinerator according to the eighth aspect, since the massive heating medium is a carbide or coke, a high effect is obtained in fly ash trapping and radiant heat, particularly in deodorizing effect, It can also assist combustion as a fuel.

(9) According to the kiln-type gasification incinerator according to the ninth aspect, the massive heating medium has a porous shape, a hollow cylindrical shape or a coil spring shape, and is a ceramic or a ceramic metal catalyst. Therefore, it is suitable as a filter for catching fly ash and is also excellent as a source of radiant heat in a high temperature state.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a kiln-type gasification incinerator according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is an enlarged view of a main part of a kiln-type gasification incinerator according to an embodiment of the present invention, as viewed from a rotary kiln axial direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary kiln 2 Heating space 3 Outer cylinder part 3a Air-permeable peripheral wall part 4 Heating / combustion device 5 Lower incineration chamber 5b Blow-in port 6 Air-permeable container 9 Exhaust gas supply mechanism 10 Carbide discharge mechanism 26 Exhaust gas purification container 26a Exhaust port 28 Vertical connection Pipe (pipe) 34 Exhaust blower (decompression means) 37 Cutting screw (carbide introduction means) 38 Discharge motor (carbide introduction means) 39 Cylinder (carbide introduction means) 40b Carbide inlet (carbide introduction means) C coke (lump) Granular heating medium)

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F23G 7/04 602 F23G 7/04 602B

Claims (9)

[Claims] 1. A rotary kiln of a substantially hermetic type, which is a gasification and carbonization chamber for incinerated material, an outer cylindrical portion outside the rotary kiln, which constitutes a heating space for the rotary kiln, and a heating device disposed below the outer cylindrical portion. An incinerator comprising: a lower incineration chamber having a combustion device; and an exhaust gas supply mechanism that guides gas generated in the rotary kiln from the rotary kiln into the lower incineration chamber and sends it to the lower incinerator, wherein the outer cylinder and the lower incineration are provided. A ventilating container through which exhaust gas from the lower incineration chamber can flow through the heating space is provided between the heating chamber and the chamber, and the ventilating container is filled with a massive heating medium. Kiln-type gasification incinerator. 2. The kiln-type gasification incinerator according to claim 1, wherein the exhaust gas supply mechanism is provided with a pressure reducing means for discharging the gas from the rotary kiln and for reducing the pressure inside the rotary kiln. Kiln-type gasification incinerator. 3. The kiln-type gasification incinerator according to claim 1 or 2, further comprising a carbide discharge mechanism for discharging the dry carbide in the rotary kiln from the rotary kiln, wherein the carbide discharge mechanism discharges the discharged dry carbide to the lower part. A kiln-type gasification incinerator characterized by comprising a carbide introduction means for introducing into the incineration chamber. 4. The kiln-type gasification incinerator according to claim 3, wherein the lower incineration chamber is formed in a vertical substantially cylindrical shape, and the exhaust gas supply mechanism is provided on an inner peripheral surface of the lower incineration chamber. A kiln-type gasification incinerator, characterized in that the gas incinerator is provided with an air outlet for discharging the gas in a tangential direction of an inner peripheral wall of the lower incineration chamber. 5. The kiln-type gasification incinerator according to claim 4, wherein the carbide introducing means includes an inlet for the dry carbide in front of a blowing direction near an upper outer periphery of the lower incineration chamber and near an air outlet. A kiln-type gasification incinerator. 6. The kiln-type gasification incinerator according to claim 1, wherein the outer cylindrical portion is provided with a permeable peripheral wall portion at a part of an outer peripheral portion thereof, and the outer cylindrical portion has a permeable peripheral wall portion outside thereof. An exhaust gas purifying container is provided in which the air-permeable peripheral wall portion is partially filled with a lump heating medium, and the exhaust gas purifying vessel is configured to discharge exhaust gas from the heating space through the lump heating medium. A kiln-type gasification incinerator characterized by having an exhaust port for exhausting gas. 7. The kiln-type gasification and incinerator according to claim 6, wherein the exhaust gas purifying container and the gas permeable container are configured to transfer a bulk heating medium in the gas exhaust gas purifying container into the gas permeable container. A kiln-type gasification incinerator characterized by being connected by a road. 8. The kiln-type gasification incinerator according to claim 1, wherein the massive heating medium is carbide or coke. 9. The kiln-type gasification incinerator according to claim 1, wherein the bulk heating medium has a porous shape, a hollow cylindrical shape, or a coil spring shape, and is made of ceramic or ceramic. A kiln-type gasification incinerator characterized by being a metal catalyst.