JP2000046471A - Refuse dryer, refuse fuel combustion system with the dryer and method for treating odor gas generated in the dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refuse dryer for improving a drying efficiency and improving a dioxin decomposing capacity by delicately controlling a temperature according to a combustion furnace, a refuse fuel combustion system having the dryer and a method for treating odor gas generated in the dryer. SOLUTION: In the refuse dryer comprising a dryer body 1 having an inner cylinder 2 and an outer cylinder 3 and constituted to charge a material to be dried in the cylinder 2, a combustion furnace 7 for supplying hot air to the cylinder 3, and a heat exchanger 10 for raising the atmosphere to be introduced into the cylinder 2 at its temperature with hot air exhausted from the cylinder 3; a deodorizing furnace 25 for deodorizing the gas generated in the cylinder 2 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refuse dryer, a refuse fuel combustion system provided with the refuse dryer, and a method for treating odor gas generated by the refuse dryer.

[0002]

2. Description of the Related Art Conventionally, a refuse dryer for drying refuse is composed of an inner cylinder and an outer cylinder as shown in Japanese Patent Application Laid-Open No. 9-133467, and the inner cylinder is provided with a material to be dried. Supplies garbage, heats the outer cylinder with hot air supplied from the combustion furnace connected to the outer cylinder, indirectly heats the inside of the inner cylinder from the outside, and heats the outside air with the hot air exhausted from the outer cylinder. After the temperature is raised by the heat exchanger, the dust is introduced into the inner cylinder to dry the dust in the inner cylinder. Then, the odor gas generated from the inner cylinder due to the drying of the refuse in the inner cylinder is returned to the above-described combustion furnace, deodorized, and then sent again as hot air to the outer cylinder as described above. .

[0003]

However, the above-mentioned conventional refuse dryer has the following problems.

[0004] That is, the combustion furnace is a heating source of the refuse dryer, and also has a function of deodorizing odor gas generated as the refuse is dried in the inner cylinder. Therefore,
To increase the deodorizing capacity, it is necessary to raise the temperature of the combustion furnace.However, if the temperature of the combustion furnace is too high, when the amount of moisture in the refuse supplied to the inner cylinder is too low, it will be overheated and dry. There is a risk of fire in the cabin.

[0005] The moisture content of the refuse greatly varies depending on the area and season in which it is generated. Therefore, when the refuse is dried as described above, delicate control that follows the moisture content is performed. Although it is required, there is a problem that such control cannot be achieved with a conventional apparatus having both a heating source and a deodorizing treatment function. Also,
If the temperature of the hot air sent from the combustion furnace is lowered due to fear of ignition in the refuse dryer, there is a problem in that the ability to deodorize odor gas and reduce the ability to decompose dioxin contained in odor gas is caused.

[0006]

According to a first aspect of the present invention, there is provided a refuse dryer comprising an inner cylinder and an outer cylinder, wherein the body of the dryer is configured to charge a material to be dried into the inner cylinder. A refuse drier comprising a combustion furnace for supplying hot air to the heat exchanger and a heat exchanger for raising the temperature of outside air introduced into the inner cylinder by the hot air exhausted from the outer cylinder. A deodorizing furnace for deodorizing odorous gas is provided.

According to a second aspect of the present invention, there is provided a method for treating odor gas generated in a refuse dryer, comprising: an inner cylinder and an outer cylinder, wherein the body to be dried is charged with the material to be dried; A refuse dryer provided with a combustion furnace for supplying hot air to the outer cylinder and a heat exchanger for raising the temperature of the outside air introduced into the inner cylinder by the hot air exhausted from the outer cylinder. This is a treatment method for treating odor gas generated during the drying process of refuse by this refuse dryer, and introducing the odor gas generated from the inner cylinder into an existing melting furnace or incinerator. Then, the odor gas is deodorized by combustion treatment in these melting furnaces or incinerators.

According to a third aspect of the present invention, there is provided a refuse fuel combustion system including a refuse dryer, comprising: an inner cylinder and an outer cylinder, wherein a body to be dried is charged into the inner cylinder; A refuse dryer including a combustion furnace for supplying hot air to the cylinder, and a heat exchanger for raising the temperature of outside air introduced into the inner cylinder by the hot air exhausted from the outer cylinder; It is provided with an odor introducing means for introducing odor gas generated from the inner cylinder of the dryer into an existing melting furnace or incinerator as primary combustion air or secondary combustion air.

According to a fourth aspect of the present invention, there is provided a waste fuel combustion system provided with a waste dryer, comprising: an inner cylinder and an outer cylinder, wherein a body to be dried is charged into the inner cylinder; A refuse dryer including a combustion furnace for supplying hot air to the cylinder, and a heat exchanger for raising the temperature of outside air introduced into the inner cylinder by the hot air exhausted from the outer cylinder; Conveying means for conveying the dried material obtained by drying the object to be dried with a dryer as a powdered fuel to an existing melting furnace or incinerator, and crushing means for crushing or crushing the dried material conveyed by the conveying means It is provided with.

A refuse dryer according to a fifth aspect of the present invention comprises an inner cylinder and an outer cylinder, and a dryer main body configured to put an object to be dried into the inner cylinder, and supplies hot air to the outer cylinder. And a communication furnace for guiding the hot air exhausted from the outer cylinder to the inner cylinder.

According to a sixth aspect of the present invention, in the refuse dryer of the fifth aspect, a odor gas generated from the inner cylinder is guided through an odor introduction pipe, and a deodorizing furnace for deodorizing the odor gas is provided. And a second odor introduction pipe branched from the odor introduction pipe for introducing a part of the odor gas into the combustion furnace.

According to a seventh aspect of the present invention, there is provided a method for treating odor gas generated in a refuse dryer, comprising: an inner cylinder and an outer cylinder, wherein the object to be dried is charged into the inner cylinder; When a waste is dried by a waste dryer provided with a combustion furnace for feeding hot air to the outer cylinder, a treatment method for treating odor generated due to the waste drying by the waste dryer And, while introducing a part of the odor gas generated from the inner cylinder to the combustion furnace for deodorization processing, the remaining odor gas is introduced into an existing melting furnace or incinerator,
The odorous gas is subjected to a deodorizing treatment by the combustion treatment of these melting furnaces or incinerators.

A refuse fuel combustion system provided with a refuse dryer according to claim 8 comprises an inner cylinder and an outer cylinder, and a dryer main body configured to put a material to be dried into the inner cylinder; A combustion furnace for supplying hot air to the cylinder, a communication pipe for guiding hot air exhausted from the outer cylinder to the inner cylinder, and a second odor introduction for guiding odor gas generated from the inner cylinder to the combustion furnace A refuse dryer comprising a pipe and a second odor introduction pipe of the refuse dryer, and a part of the odor gas is supplied to an existing melting furnace or incinerator as secondary combustion air or exhaust gas cooling air. It is provided with an odor introduction means for introduction.

According to a ninth aspect of the present invention, there is provided a refuse fuel combustion system including a refuse dryer, comprising: an inner cylinder and an outer cylinder; A refuse dryer including a combustion furnace for supplying hot air to the cylinder, and a communication pipe for guiding the hot air exhausted from the outer cylinder to the inner cylinder, and drying the object to be dried with the refuse dryer; It is provided with a transport means for transporting the processed dried product as powdered fuel to an existing melting furnace or incinerator, and a crushing means for crushing or crushing the dried product transported by the transport means.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of a refuse dryer according to the first aspect. In the figure, reference numeral 1 denotes a dryer main body, which comprises an inner cylinder 2 and an outer cylinder 3 provided to cover the inner cylinder 2.

The inner cylinder 2 is a cylindrical member rotatable by a driving device (not shown). A dust receiving port 2a is formed on one side of the inner cylinder 2, and the dust receiving port 2a has a dust receiving port 2a. The supply device 5 is provided continuously. Further, a dust discharge port 2b is formed on the other side of the inner cylinder 2.

A stirring member 2c for stirring dust in the inner cylinder 2 is provided in the inner cylinder 2.

The refuse supply device 5 supplies a constant amount of refuse as a material to be dried into the inner cylinder 2. For example, refuse supplied to a hopper 5 b from a refuse storage chamber (not shown) is supplied to the inner cylinder 2 by a screw feeder 5 a. Supply within. In addition,
As described above, the refuse supplied to the refuse supply device 5 may be crushed by a crusher in advance, if necessary.

A combustion furnace 7 is connected to the outer cylinder 3 via a hot air supply pipe 6. The combustion furnace 7 includes a combustion chamber 7a,
And a burner 7b serving as a heat source.
The outside air introduced into the combustion chamber 7a is heated by c, and the heated high-temperature air (hot air) is fed into the outer cylinder 3.

A discharge port 3a is formed in the outer cylinder 3, and one end of a discharge pipe 8 is connected to the discharge port 3a. A heat exchanger 10 and an exhaust fan 11 are interposed in the discharge pipe 8, and the other end is open to the outside air.

In the heat exchanger 10, the discharge pipe 8 is inserted into the heat exchange chamber 10a, and a fan 15 is connected to one end of the heat exchange chamber 10a through an outside air introduction pipe 13. The other end of the chamber 10 a is connected to one end of the supply pipe 16. The other end of the supply pipe 16 is
It is connected to an introduction chamber 2d connected to the waste receiving port 2a.

Therefore, in the heat exchanger 10, the high-temperature air exhausted from the outer cylinder 3 through the discharge pipe 8 and the fan 1
Heat is exchanged with the outside air introduced by 5, whereby the outside air is heated and introduced into the inner cylinder 2 through the supply pipe 16 and the introduction chamber 2 d.

The outside air introduced into the inner cylinder 2 in this manner is heated in the heat exchanger 10, and thus has an effect of directly drying the refuse in the inner cylinder 2. Therefore, in the dryer main body 1, the refuse in the inner cylinder 2 is directly dried by the heated external air introduced into the inner cylinder 2, and the high-temperature air supplied from the combustion furnace 7 to the outer cylinder 3 is dried. Thus, the refuse in the inner cylinder 2 is indirectly dried from the outside.

A discharge silo 17 is connected to the waste discharge port 2b of the inner cylinder 2. The discharge silo 17 has a discharge device 18 provided with a screw feeder 18 a at its lower end, and has an upper end connected to a side surface of an upper end of the cyclone 21 via a communication pipe 20.

The cyclone 21 removes fine dust sucked together with odor from the discharge silo 17 by a fan 23 which will be described later. The lower end of the cyclone 21 is connected to the middle of the unloading device 18 via a discharging device 21a. . One end of an odor introduction pipe 22 is connected to the upper end of the cyclone 21. The odor introduction pipe 22 has a fan 2
3. A heat exchanger 24 is interposed, and the other end is connected to a deodorizing furnace 25.

The fan 23 is a silo 1 for discharging air containing odor (hereinafter referred to as odor gas) generated in the inner cylinder 2.
7 and introduced into the deodorizing furnace 25.

The deodorization furnace 25 comprises an odor treatment chamber 25a to which the other end of the odor introduction pipe 22 is connected, and a burner 25b serving as a heat source. The combustion of the burner 25b causes the odor introduction pipe 22 to pass therethrough. The odor gas introduced into the odor treatment chamber 25a is deodorized.

The heat exchanger 24 has a communication pipe in which the odor introduction pipe 22 is inserted into a heat exchange chamber 24a and one end of the heat exchange chamber 24a is connected to a tip of the odor treatment chamber 25a. 26 is connected to the odor treatment chamber 25
The heat exchange is performed between the deodorized high-temperature air supplied from a through the communication pipe 26 and the odor gas flowing through the odor introduction pipe 22. That is, the odor gas is supplied to the heat exchanger 2
The temperature is raised in advance by the high-temperature air discharged from the deodorizing furnace 25 by 4 and introduced into the deodorizing furnace 25.

The other end of the heat exchange chamber 24a is connected to one end of a discharge pipe 27 for discharging the deodorized high-temperature air introduced into the heat exchange chamber 24a through the communication pipe 26. . The exhaust pipe 27 has a fan 28 interposed in the middle and the other end connected to the exhaust pipe 8. The fan 28 has been subjected to the deodorizing treatment in the heat exchange chamber 24 a through the exhaust pipe 27. The air is sucked and merged with the discharge pipe 8 before being discharged to the outside air.

An outside air introduction pipe 29 having a damper 29a is connected to the discharge pipe 8 upstream of the exhaust fan 11 and upstream of the discharge pipe 27 upstream of the fan 28, respectively. By introducing the outside air through 29, the exhaust concentration of the air discharged to the outside air through the exhaust pipes 8 and 27 is adjusted.

Next, a description will be given of a drying operation performed by the refuse dryer having such a configuration.

The refuse supplied to the refuse supply device 5 via the hopper 5b is supplied to the inner cylinder 2 from the refuse inlet 2a by the screw feeder 5a.

The refuse supplied into the inner cylinder 2 in this manner is transferred to the refuse receiving port 2 by an operation such as rotation of the inner cylinder 2.
a, the inner tube 2 is heated from the outside by the hot air supplied from the combustion furnace 7, and the inner tube 2 is heated by the outside air heated by the heat exchanger 10. The refuse is dried by heating the inside of the refuse. At this time, since the dust is stirred by the stirring member 2c in the inner cylinder 2, the evaporation of the moisture of the dust is promoted, and the dust is sent to the dust outlet 2b in a sufficiently dried state.

Then, the dried refuse as the dried product dried by the dryer main body 1 is discharged from the refuse discharge port 2b into the silo 1
, And from the lower part of the discharge silo 17, the transfer device 1
8 is introduced. In the transport device 18, the dried refuse is carried out at any time from the outlet 18b together with fine dried refuse introduced from the lower end of the cyclone 21 by the screw feeder 18a.

The odor gas generated in the inner cylinder 2 as the refuse is dried is introduced into the cyclone 21 from the upper part of the discharge silo 17 by the fan 23 through the communication pipe 20, and then the odor introduction pipe from the cyclone 21. Introduced into the deodorizing furnace 25 by 22.

At this time, the odor gas in the odor introduction pipe 22 is heat-exchanged between the deodorized high-temperature air discharged from the deodorizing furnace 25 by the heat exchanger 24 and heated to a temperature above. After being introduced into the deodorizing furnace 25 and subjected to deodorizing treatment by the deodorizing furnace 25, it is joined to the discharge pipe 8 through the communication pipe 26, the heat exchanger 24, and the discharge pipe 27, and is discharged to the outside air.

As described above, the odor gas is supplied to the special deodorizing furnace 2.
After deodorizing by 5 and releasing to outside air,
Deodorization treatment can be performed reliably and efficiently irrespective of fluctuations in the amount of water in the refuse to be charged. Further, thereby, in the combustion furnace 7, irrespective of the deodorizing treatment, delicate temperature control corresponding to the fluctuation of the amount of water in the refuse can be performed, and the drying efficiency can be improved, and the decomposition of dioxin can be improved. Assured control becomes possible, and the dioxin decomposition ability can be improved.

FIG. 2 shows the structure of a refuse dryer according to the fifth and sixth aspects. In addition, about the member of the same structure as the above-mentioned refuse dryer, the same code | symbol is attached | subjected to the same member, and description is abbreviate | omitted.

In this refuse dryer, the outlet 3a of the outer cylinder 3 is connected to the introduction chamber 2d through the communication pipe 30. That is, the hot air sent from the combustion furnace 7 to the outer cylinder 3 is
0, it is directly introduced into the inner cylinder 2 through the introduction chamber 2d.

Further, one end of the second odor introduction pipe 31 is connected to the odor introduction pipe 22 downstream of the heat exchanger 24, and the other end of the second odor introduction pipe 31 is connected to the fan 7 c via the damper 32. It is connected. That is, the odor introduction pipe 22 is branched by the second odor introduction pipe 31 on the downstream side of the heat exchanger 24, and the second odor introduction pipe 31 is used by the second odor introduction pipe 31.
A part of the odor gas sent through the hopper is supplied to the fan 7c, and the odor gas is deodorized by the combustion furnace 7.

Further, a damper 3 is provided in the middle of the discharge pipe 27.
3 and the damper 32 and the damper 33
By adjusting the opening degree, the amount of odor gas sent to the combustion furnace 7 and the amount of odor gas sent to the deodorization furnace 25 are adjusted.

Reference numerals 35 and 36 denote fans, which are located at different positions from the above-described refuse dryer.
The effect is the same.

Further, the damper 3 of the second odor introduction pipe 31 is provided.
An outside air introduction pipe 35 having a damper 35a is connected between the second air supply pipe 2 and the fan 7c. By introducing outside air through the outside air introduction pipe 35, the odor gas introduced into the combustion furnace 7 through the second odor introduction pipe 31 is connected. The density is adjusted.

By configuring the garbage dryer in this way,
After the hot air introduced into the outer cylinder 3 from the combustion furnace 7 heats the outer peripheral surface of the inner cylinder 2, the hot air is introduced into the inner cylinder 2 from the communication pipe 30 to directly dry the refuse in the inner cylinder 2. At this time, the outer cylinder 3
The hot air introduced therein is sufficiently cooled and reduced in temperature while being introduced into the outer cylinder 3 and introduced into the inner cylinder 2 through the communication pipe 30. Therefore, even if the temperature of the hot air introduced from the combustion furnace 7 into the outer cylinder 2 is set to a certain high level, the temperature of the air introduced into the inner cylinder 2 by the above-mentioned cooling becomes lower, so that the dust in the inner cylinder 2 is reduced. Is not ignited, and a part (for example, a half amount) of the odor gas introduced into the combustion furnace 7 from the second odor introduction pipe 31 can be sufficiently deodorized.

Further, the odor gas introduced from the odor introduction pipe 22 into the deodorization furnace 25 to be deodorized is not a whole amount but a part diverted through the second odor introduction pipe 22, so that the burden of the deodorization processing is reduced. Thus, the fuel used in the deodorizing furnace 25 is also reduced, so that the running cost can be reduced by an amount corresponding to the deodorizing process in the combustion furnace 7.

Each of the above-described refuse dryers is combined with a melting furnace described below,
A refuse fuel combustion system including a refuse dryer can be configured.

First, before describing the configuration of a refuse fuel combustion system provided with this refuse dryer, the configuration of the above-mentioned melting furnace will be described with reference to FIG.

In FIG. 3, reference numeral 40 denotes a combustion and melting device which is a main part of the melting furnace. The combustion and melting device 40 includes an upper primary combustion chamber 41 and a lower secondary combustion chamber arranged in two upper and lower stages. 42. The primary combustion chamber 41 and the secondary combustion chamber 42 are formed in a cylindrical shape.

A preheating burner 43 is provided at an upper portion of the primary combustion chamber 41, and a secondary air inlet 4 is provided at a lower portion thereof.
4 are formed.

At the secondary air inlet 44, a secondary air supply pipe 45 for supplying secondary air is provided with an adjustment damper 46 and a blower 4
7 are connected.

A fuel supply port 48 is formed in the upper part of the primary combustion chamber 41, and a fuel supply pipe 51 connected to a pulverizer 57 described later is connected to the fuel supply port 48 via a blower 52. It is connected.

Here, the fuel supply pipe 51 and the secondary air supply pipe 45 are connected so as to supply primary air and secondary air containing fuel to the cylindrical primary combustion chamber 41 from a tangential direction. In the primary combustion chamber 41, the primary combustion is performed while generating a swirling flow by the fuel and the secondary air including the primary air supplied in this manner, and is introduced into the lower secondary combustion chamber 42. That is, the combustion melting device 40 is of a so-called cyclone type.

A heating burner 53 is provided above the secondary combustion chamber 42. 54 is the combustion melting device 4
This is a hopper for storing the solid fuel to be supplied to the hopper. The hopper 54 has an input port 55 for charging solid fuel on the upper surface, and a fixed-quantity supply device 56 such as a screw conveyor connected to a lower discharge port. Fixed amount supply device 56
Is connected to a crusher 57 as crushing means according to the fourth and ninth aspects. The pulverizer 57 is for pulverizing the solid fuel supplied from the quantitative supply device 56 into a powder of a predetermined size, and is a hammer type as shown in the illustrated example, or a type having a cutting blade in a screw. And the like are used.

The solid fuel pulverized by the pulverizer 57 is guided by the blower 52 from the fuel supply port 48 to the upper part of the first combustion chamber 41 through the fuel supply pipe 51.

Here, as the solid fuel, dry refuse dried by the refuse dryer described above is used. That is, the transport device 18 constitutes the transport means according to claims 4 and 9, and the carry-out port 18 b of the transport device 18 is connected to the input port 5 of the hopper 54.
5 are arranged.

A collecting device 5 for collecting the molten ash discharged from the lower end discharge port is provided at the lower end discharge port of the secondary combustion chamber 42.
8 are provided.

In the recovery device 58, a granulated slag conveyor 61 is submerged in a water tank 60 in which cooling water is stored, and the molten ash that has fallen in the water tank 60 is disposed as a granulated slag outside and adjacent to the slag. It is carried out to the discharge hopper 62.

An exhaust gas outlet 63 is formed in the middle of the side surface of the secondary combustion chamber 42, and a boiler 64, a cyclone 65, a bag filter 66, and a suction fan 67 are connected to the exhaust gas outlet 63. They are sequentially connected by tubes.

The boiler 64 generates hot water or steam by using high-temperature exhaust gas introduced from the secondary combustion chamber 42 by the suction action of the suction fan 67. Depending on the purpose, the hot water boiler or steam is used. Boilers are used,
The hot water or steam generated by the boiler 64 is guided to the outside and used appropriately.

The cyclone 65 separates fly ash contained in the exhaust gas from the exhaust gas. The separated fly ash is deposited on the bottom 65a, and the exhaust gas is introduced into the bag filter 66 from the top.

The bottom 65 a of the cyclone 65 is connected to the pulverizer 57 by a circulation pipe 69. Fly ash deposited on the bottom 65 a of the cyclone 65 is returned to the pulverizer 57 and incinerated by the combustion and melting device 40. It is made to handle.

The bag filter 66 removes trace harmful substances contained in the exhaust gas and collects fly ash introduced without being separated by the cyclone 65.

For example, lime is supplied to the bag filter 66 from the lime blowing device 68 as a neutralizing agent.
This lime neutralizes and removes acidic trace harmful substances. In addition, from the lime blowing device 68, powdered activated carbon that adsorbs trace harmful substances such as dioxins is supplied to the bag filter 66 together with the lime, and the activated carbon adsorbs trace harmful substances such as dioxins. .

Therefore, in the bag filter 66, the trace harmful substances in the exhaust gas are rendered harmless by the neutralization and adsorption as described above, and then released to the outside air, and the collected fly ash, used lime, The activated carbon to which dioxin has been adsorbed is deposited on the bottom by appropriate removal and discharged from the bottom. These discharged substances are disposed of after being rendered harmless by chemicals or the like.

The reference numerals 69a, 69b, 6 shown in FIG.
9c is a damper for adjusting the air volume. Next, a case in which dry refuse is burned by the melting furnace configured as described above will be described.

First, dried refuse that has been dried by a refuse dryer is put into a hopper 54 and a predetermined amount is stored in the hopper 54.

Then, from the hopper 54, the fixed amount supply device 56
The dry waste is supplied to the crusher 57 by the crusher 5.
After being pulverized into a powder by 7, it is introduced into the primary combustion chamber 41 of the combustion and melting device 40 by a blower 52 through a fuel transport pipe 51.

In the primary combustion chamber 41, the dried waste is ignited and burned by a preheating burner 43. At this time, the dried refuse is burned in the primary combustion chamber 41 while generating a swirling flow by the action of the supply direction of the primary air and the secondary air containing the fuel from the fuel supply pipe 51 and the secondary air supply pipe 45. , And is introduced into the lower secondary combustion chamber 42, and is further burned by generating a flame by the heating burner 53.

By the combustion by the combustion and melting device 40 described above, the molten ash is dropped from the lower outlet of the secondary combustion chamber 42 into the cooling water of the recovery device 58 and granulated as granulated slag crushed by a rapid cooling action. The slag is conveyed to a slag discharge hopper 62 by a slag conveyor 61.

Exhaust gas generated as a result of combustion by the combustion melting device 40 is introduced into the boiler 64 from the gas outlet 63 by the suction action of the suction fan 67,
The heat is exchanged at 4, cooled, and introduced into the cyclone 65.

In the cyclone 65, fly ash contained in the exhaust gas is separated from the exhaust gas and deposited on the bottom. The exhaust gas is introduced into the bag filter 66 from above the cyclone 65.

In the bag filter 66, the lime blowing device 68
Neutralizes acidic trace harmful substances in the exhaust gas with lime supplied from the exhaust gas, and discharges it as clean gas through the suction fan 67 to the outside air.

Further, trace harmful substances such as dioxins in the exhaust gas are adsorbed by powdered activated carbon supplied together with the lime from the lime blowing device 68. And, together with the lime for neutralization treatment described above and the collected fly ash,
The material is deposited on the bottom by appropriate scraping, and the deposit is carried out to the outside, whereupon the material is detoxified.

Here, the bottom 65a of the cyclone 65
The fly ash deposited on the primary combustion chamber 41 is returned to the crusher 57 again by the circulation pipe 69, is introduced into the primary combustion chamber 41 through the crusher 57 and the fuel transport pipe 11, and is incinerated.

Each of the above-mentioned refuse dryers is combined with the melting furnace configured as described above. Specifically, first, when the refuse dryer shown in FIG. 1 is combined, the discharge port 18 b of the discharge device 18 of the refuse dryer is connected to the hopper 54 as described above, and the transfer of the discharge device 18 is performed. Dry waste is put into the hopper 54 from the outlet 18b, and the waste is used as a solid fuel as described above.

The odor gas introduced into the deodorizing furnace through the odor introducing pipe and subjected to the deodorizing treatment is used as primary combustion air or secondary combustion air of the combustion and melting device 40, and the combustion and melting device 40 Deodorize.

More specifically, when used as primary combustion air, the odor introduction pipe 22 is connected to the suction side of the blower 52 as shown in FIG. Is introduced into the primary combustion chamber 41 together with dry waste through the fuel supply pipe 51 as primary air.

When the air is used as secondary combustion air, the odor introduction pipe 22 is connected to the blower 47,
7, the secondary air is introduced from the secondary air inlet 44 into the first combustion chamber 41. That is, the odor introduction pipe 22 constitutes the odor introduction means according to the third aspect.

Thus, the odor gas introduced through the odor introduction pipe 22 is deodorized by the combustion operation of the combustion and melting device 40. In other words, by combining the refuse dryer with the existing melting furnace, deodorization on the refuse dryer side becomes unnecessary.
As a result, the deodorizing furnace 25 and the heat exchanger 24 become unnecessary,
Equipment costs and operation costs can be reduced, and operation efficiency can be increased.

Next, when the above-described refuse dryer shown in FIG. 2 is combined, similarly to the above-described refuse dryer, the discharge port 18b of the discharge device 18 of the refuse dryer is connected to the hopper 5
4 and the drying refuse is introduced into the hopper 54 from the discharge port 18b of the unloading device 18, the dried refuse is used as the solid fuel as described above, and the melting furnace is operated.

Further, the odor gas introduced into the deodorizing furnace through the odor introducing pipe 22 and subjected to the deodorizing treatment is used as the secondary combustion air of the melting furnace, whereby the deodorizing treatment is performed by the melting furnace.

Specifically, the odor introduction pipe 22 is connected to the blower 47 in the same manner as described above, and the odor introduction pipe 22 is introduced into the primary combustion chamber 41 from the secondary air introduction port 44 by the blower 47. That is, the odor introduction pipe 22 constitutes the odor introduction means according to claim 8.

Thus, the remaining odor gas divided by the second odor introduction pipe 31 is introduced into the primary combustion chamber 41 of the combustion and melting device 40 by the odor introduction tube 22, and the deodorizing treatment is performed by the combustion operation of the combustion and melting device 40. Is done. In other words, by combining the existing melting furnace with the garbage dryer, the deodorizing furnace 2
The deodorizing treatment by the deodorizing furnace 5 becomes unnecessary.
In addition, the need for the heat exchanger 24 is eliminated, the operation cost can be reduced, and the operation efficiency can be increased.

The odor gas sent through the odor introduction pipe 22 can be used not only as secondary combustion air but also as cooling air for cooling the exhaust gas discharged from the combustion / melting device 40, thereby cooling the exhaust gas. The deodorizing treatment can be performed by raising the temperature of the odorous gas.

In the combustion and melting device 40, the unloading device 1
Since the dried refuse introduced from 8 is once pulverized by the pulverizer 57 and then burned by the combustion and melting device 40, the pulverized powdered dry refuse has good contact efficiency with air and is easy to ignite. In addition, since exhaust gas properties are stabilized by performing complete combustion with a small amount of air and the amount of exhaust gas is reduced, the size of the subsequent exhaust gas treatment equipment can be reduced. Further, since fly ash deposited on the bottom 65a of the cyclone 65 is again incinerated by the combustion and melting device 1, the amount of fly ash can be surely reduced, and the discharge amount of the entire system can be reduced.

As described above, the method for treating the odor gas generated in the refuse dryer according to the second and seventh aspects of the present invention is implemented by the refuse fuel combustion system formed by combining each refuse dryer and the melting furnace. be able to.

In this example, a refuse fuel combustion system is configured by combining a refuse dryer and a melting furnace, but a refuse fuel combustion system is configured by combining an incinerator with a refuse dryer instead of a melting furnace. Is also good.

[0089]

As described above, according to the refuse drier of the first aspect, the odor gas generated from the inner cylinder due to the drying of the material to be dried is deodorized by the deodorizing furnace instead of the combustion furnace. Thus, the deodorizing process can be performed reliably and efficiently irrespective of the fluctuation of the moisture content of the material to be dried input by the dedicated deodorizing furnace. In addition, this allows the combustion furnace to perform delicate temperature control that responds to changes in the amount of water in the garbage that is input, regardless of the deodorization process, improving drying efficiency and ensuring the decomposition of dioxin. The dioxin decomposition ability can be improved.

According to the method for treating odor gas generated by the refuse dryer according to the second aspect and the refuse fuel combustion system provided with the refuse dryer according to the third aspect, the inner cylinder is accompanied by the drying of the material to be dried. Odor gas generated from odor is introduced into the existing melting furnace or incinerator as primary combustion air or secondary combustion air by odor introduction means and deodorized, eliminating the need for deodorization on the garbage dryer side. This eliminates the need for a deodorizing furnace and a heat exchanger attached to the deodorizing furnace. Thereby, equipment cost and operation cost can be reduced, and operation efficiency can be improved.

According to a refuse fuel combustion system provided with a refuse dryer according to claims 4 and 9, the dried product obtained by drying the material to be dried by the refuse dryer is conveyed to a melting furnace or an incinerator by a conveying means, and is melted. By burning this dried product as a fuel in an incinerator or incinerator, continuous operation becomes possible and the system can be operated stably. In addition, since the dried product is crushed by the crushing means or crushed by the crushing means and then burned in a melting furnace or a combustion furnace, the crushed dry garbage has good contact efficiency with air, is easy to ignite, and has little air. In addition to stabilizing the exhaust gas properties by complete combustion, the amount of exhaust gas is reduced, so that the subsequent exhaust gas treatment equipment can be downsized.

According to the fifth aspect of the present invention, since the communication pipe for guiding the hot air exhausted from the outer cylinder to the inner cylinder is provided, the hot air introduced into the outer cylinder from the combustion furnace is reduced. After heating the outside of the inner cylinder, it is introduced from the communication pipe into the inner cylinder,
The garbage in the inner cylinder is directly dried. At this time, the hot air introduced into the outer cylinder as described above is sufficiently cooled and the temperature is reduced while being introduced into the outer cylinder and introduced into the inner cylinder through the communication pipe. Even if the temperature of the hot air introduced into the outer cylinder is set to a certain level, the temperature of the air introduced into the inner cylinder is reduced by the above-mentioned cooling, so that the dust in the inner cylinder is not ignited and is safe. In addition, when introducing outside air into the inner cylinder, since the heat exchanger required to raise the temperature of this outside air becomes unnecessary,
Equipment costs can be reduced.

According to the refuse dryer of the sixth aspect, a part of the odor gas to be introduced into the deodorizing furnace through the odor introducing pipe and deodorized is guided to the combustion furnace through the second odor introducing pipe. By deodorizing a part of the odorous gas, the burden of the deodorizing process by the deodorizing furnace is reduced, and the fuel used in the deodorizing furnace is also reduced. Can be reduced by the amount corresponding to. Further, since the odor gas to be deodorized in the combustion furnace is not the whole amount but a part diverted by the second odor introduction pipe, it is necessary to sufficiently perform the deodorization treatment without adversely affecting the drying of the object to be dried by the combustion furnace. Can be. Further, since the temperature of the hot air generated from the combustion furnace is sufficiently reduced in the outer cylinder, the temperature in the combustion furnace can be set to a relatively high temperature at which deodorization and dioxin decomposition can be performed. Thereby, the deodorizing treatment and the dioxin decomposition of the odor gas introduced from the second odor introduction pipe can be efficiently performed.

According to the method for treating odor gas generated by the refuse dryer according to claim 7 and the refuse fuel combustion system provided with the refuse dryer according to claim 8, the inner cylinder is provided with the drying treatment of the material to be dried. A part of the odor gas generated from odor is introduced into the existing melting furnace or incinerator as secondary combustion air or exhaust gas cooling air by odor introduction means and deodorized, so that the deodorization furnace on the garbage dryer side Elimination of the deodorizing treatment by means of the deodorizing furnace and the heat exchanger attached to the deodorizing furnace are not required. Thereby, equipment cost and operation cost can be reduced, and operation efficiency can be improved. In addition, because part of the exhaust gas from the dryer is introduced into the existing melting furnace, etc., the load on the exhaust gas treatment equipment such as the melting furnace can be reduced, and the capacity of the exhaust gas treatment equipment on the melting furnace side is increased. Therefore, the cost for equipment such as a melting furnace can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a refuse dryer according to the first embodiment.

FIG. 2 is a diagram showing a configuration of a refuse dryer according to claims 5 and 6;

FIG. 3 is a diagram showing a configuration in a case where a melting furnace and a refuse dryer are combined with the melting furnace.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dryer main body 2 Inner cylinder 3 Outer cylinder 7 Combustion furnace 10 Heat exchanger 18 Unloading device 22 Odor introduction pipe 25 Deodorization furnace 30 Communication pipe 31 Second odor introduction pipe 57 Crusher

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masanori Suga 6-107 Takino-cho, Nishinomiya-shi, Hyogo Shinmeiwa Industry Co., Ltd. 107 Shinmeiwa Industry Co., Ltd. Development Technology Division (72) Inventor Susumu Yamamoto 6-107 Takino-cho, Nishinomiya-shi, Hyogo Prefecture Shinmeiwa Industry Co., Ltd. Development Technology Division F-term (reference) 3L113 AA07 AB05 AC04 AC16 AC40 AC45 AC46 AC48 AC49 AC52 AC53 AC54 AC57 AC58 AC59 AC60 AC63 AC67 AC79 AC87 BA01 DA06 DA10 DA14 DA21 DA26

Claims (9)

[Claims] 1. A dryer main body comprising an inner cylinder and an outer cylinder and configured to charge a material to be dried into the inner cylinder, a combustion furnace for supplying hot air to the outer cylinder, A refuse dryer comprising a heat exchanger for raising the temperature of outside air introduced into the inner cylinder by hot air exhausted from the cylinder, wherein a deodorizing furnace for deodorizing odorous gas generated in the inner cylinder is provided. And garbage dryer. 2. A dryer main body comprising an inner cylinder and an outer cylinder, wherein a drying object is charged into the inner cylinder, a combustion furnace for supplying hot air to the outer cylinder, and When drying the refuse by a refuse dryer provided with a heat exchanger for raising the temperature of the outside air introduced into the inner cylinder by the hot air exhausted from the cylinder, when the refuse is dried by the refuse dryer, A processing method for processing odor gas generated accompanying the odor gas, wherein the odor gas generated from the inner cylinder is introduced into an existing melting furnace or incinerator, and the odor gas is subjected to combustion processing in the melting furnace or incinerator. A method for treating odor gas generated in a garbage dryer, which comprises performing a deodorizing treatment. 3. A dryer main body comprising an inner cylinder and an outer cylinder, wherein a drying object is charged into the inner cylinder, a combustion furnace for supplying hot air to the outer cylinder, and A refuse dryer including a heat exchanger for raising the temperature of outside air introduced into the inner cylinder by hot air exhausted from the cylinder; and an existing melting furnace for converting odor gas generated from the inner cylinder of the refuse dryer to an existing melting furnace. Alternatively, a refuse fuel combustion system provided with a refuse dryer, characterized by comprising an odor introduction means for introducing into the incinerator as primary combustion air or secondary combustion air. 4. A dryer main body comprising an inner cylinder and an outer cylinder, wherein a drying object is charged into the inner cylinder, a combustion furnace for supplying hot air to the outer cylinder, and A refuse dryer provided with a heat exchanger for raising the temperature of the outside air introduced into the inner cylinder by hot air exhausted from the cylinder; and a dried product obtained by drying the object to be dried with the refuse dryer. A refuse provided with a refuse dryer, comprising: a conveying means for conveying powdery fuel to a melting furnace or an incinerator; and a crushing means or a crushing means for crushing the dried material conveyed by the conveying means. Fuel combustion system. 5. A drier body comprising an inner cylinder and an outer cylinder, wherein a drying object is charged into the inner cylinder, and a combustion furnace for feeding hot air to the outer cylinder. In the refuse dryer, a communication pipe for guiding hot air exhausted from the outer cylinder to the inner cylinder is provided. 6. The refuse dryer according to claim 5, wherein the odor gas generated from the inner cylinder is guided through an odor introduction pipe, and the odor gas is branched from the odor introduction pipe for deodorizing the odor gas. A second odor introduction pipe for introducing a part of the odor gas into the combustion furnace. 7. A dryer main body comprising an inner cylinder and an outer cylinder, wherein a drying object is charged into the inner cylinder, and a combustion furnace for feeding hot air to the outer cylinder. This is a method for treating odor generated when the garbage is dried by the garbage dryer, and the odor generated by the garbage drying process by the garbage dryer. The odor gas is guided to the combustion furnace and deodorized, and the remaining odor gas is introduced into an existing melting furnace or incinerator, and the odor gas is deodorized by burning the melting furnace or the incinerator. A method for treating odor gas generated by a garbage dryer. 8. A dryer body comprising an inner cylinder and an outer cylinder, wherein a drying object is charged into the inner cylinder, a combustion furnace for feeding hot air to the outer cylinder, and A refuse dryer comprising: a communication pipe for guiding hot air exhausted from the cylinder to the inner cylinder; and a second odor introduction pipe for guiding odor gas generated from the inner cylinder to the combustion furnace. And an odor introducing means for introducing a part of the odor gas into the existing melting furnace or incinerator as secondary combustion air or exhaust gas cooling air. Garbage fuel combustion system with garbage dryer. 9. A dryer main body comprising an inner cylinder and an outer cylinder, wherein a drying object is supplied to the inner cylinder, a combustion furnace for supplying hot air to the outer cylinder, A refuse dryer equipped with a communication pipe for guiding the hot air exhausted from the cylinder to the inner cylinder; and drying the material to be dried with the refuse dryer into an existing melting furnace or incinerator. A refuse fuel combustion system comprising a refuse dryer, comprising: transport means for transporting as fuel; and crushing means for crushing or crushing the dried material transported by the transport means.