JP3170752B2 - Organic raw material continuous carbonization apparatus and continuous carbonization method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic raw material continuous carbonizing apparatus for drying and carbonizing organic raw materials such as sewage sludge, food processing waste, sludge of a paper mill or livestock dung, and a continuous carbonizing method thereof.

[0002]

2. Description of the Related Art As this type of continuous carbonizing apparatus, a 300
There is one described in Japanese Utility Model Registration No. 9966.
In this apparatus, a semi-cylindrical transport path and a cylindrical transport path for transporting organic raw materials such as livestock dung are arranged in a rectangular cylindrical furnace having a combustion chamber at the bottom. The organic material is dried and carbonized by heat generated in the combustion chamber while the organic material is being conveyed by the passage.

[0003]

However, in the above-mentioned conventional apparatus, when an organic material having a high water content exceeding about 60 to 70%, such as sewage sludge, is supplied to the apparatus, the raw material is not supplied. Adheres to the inner wall of the transport path or the screw, thereby closing the transport path, and a phenomenon occurs in which the organic material cannot be transported. In addition, when the conveyance becomes impossible, maintenance work such as cleaning accompanied by disassembly of the conveyance path is required, so that there is a disadvantage that the operation efficiency is lowered and the cost is increased.

Further, in the above-mentioned conventional apparatus, since only the organic material is simply dried and carbonized by utilizing the heat generated in the combustion chamber, impurities are already adsorbed and chemically stabilized. However, such organic raw materials cannot be activated, and their uses are limited.

[0005] An object of the present invention is to provide a continuous carbonization apparatus for organic material and a method for continuous carbonization of the organic material, regardless of the water content of the organic material, so that the material can be transported well and the carbonized organic material can be activated.

[0006]

The organic raw material continuous carbonization apparatus of the present invention comprises an evaporating conveyance path B1, B2 installed on the uppermost stage of a paddle conveyor screw, and a paddle conveyor screw interior installed on the lower stage in multiple stages. A horizontal conveying path group B composed of the carbonizing conveying paths B3 to B7 is provided on the heating furnace A, and the conveying end portions B1b and B2b of the evaporating conveying paths B1 and B2 and the multi-stage carbonizing conveying path B3. To the transfer start end B3a of the uppermost one of them is connected by a downflow path 7 that extends vertically, and a crusher D is arranged in the downflow path 7.

In this case, the multi-stage carbonizing conveying paths B3 to B7
Is connected to the intermediate portion of the separation conveyance path E in which the conveyance screw 27 whose forward and reverse rotation is controlled is housed in the cylindrical body 26, and the separation conveyance path E It is preferable that the upstream end in the transport direction be the outlet 26a and the downstream end be the outlet 26b connected to the cooling transport paths F1 and F2.

According to the present invention, there is provided an organic material raw material continuous carbonization method comprising: an evaporation step of evaporating water content while reducing a cross-linking state of an organic material during horizontal conveyance by an evaporating conveyance path; A crushing step of crushing the raw material and a carbonizing step of carbonizing while reducing the crosslinked state of the organic raw material during the horizontal transportation by the transportation path for carbonization are sequentially performed.

In this case, whether or not the organic material is carbonized is detected based on the temperature of the organic material in the separation conveyance path, and when the organic material is carbonized, the conveyance screw is rotated forward and the downstream end of the separation conveyance path is rotated. It is preferable that the transporting screw is reversely rotated when the carbonized material is not carbonized, and that the organic material is transported to the outlet at the upstream end of the transporting path for separation. It is.

[00010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. A is a heating furnace body. This heating furnace body A is shown in FIG.
As shown in FIG. 3, the heat-insulating side walls A1 to A4 are formed so as to surround a substantially rectangular tube.
a, and the upper part thereof is a sub-heating section Ab.

Reference numeral 1 denotes a combustion device installed below the main heating section Aa. The combustion device 1 is operated by a temperature sensor (not shown) arranged in the main heating section Aa so as to always maintain the inside of the main heating section Aa at a set temperature. The temperature in the main heating section Aa can be set arbitrarily between approximately 400 ° C. and 700 ° C.

The heat-insulating side wall A3 facing the sub-heating section Ab includes:
An air nozzle 2 that blows outside air (fresh air) is provided in the sub-heating unit Ab.
A base T assembled in a flat U-shape surrounding the base of the heating furnace body A
The air fan 4 mounted thereon is connected. That is, by blowing outside air from the air nozzle 2 into the sub-heating unit Ab, the incomplete combustion gas passing through the sub-heating unit Ab is completely burned.

Reference numeral 5 denotes an exhaust pipe mounted on the upper portion of the heating furnace body A, and discharges completely burned gas through the exhaust pipe 5 to the atmosphere.

Reference numeral B denotes a group of horizontal conveyance paths provided on the main heating section Aa in the heating furnace body A. In the horizontal conveying path group B, the evaporating conveying paths B1 and B2 are arranged in parallel at the uppermost stage, and the carbonizing conveying paths B3 to B7
It is a total of six steps that were erected in steps.

Transport start end B1 of evaporation transport paths B1, B2
The charging hopper 6 is disposed above the transfer paths B1a and B2a, and the transfer end sections B1 of the transfer paths B1 and B2 for evaporation.
b and B2b are connected to the lower carbonization transport path B3, that is, the transport start end B3a of the second horizontal transport path from the top, by the downflow path 7. Similarly, each of the transport end portions B3b, B4b, B of the carbonizing transport paths B3, B4, B6.
6b and their respective lower-stage carbonizing conveying paths B4, B5,
The transport start ends B4a, B5a, and B7a of B7 are connected by downflow paths 8 to 11, respectively.

An input hopper 6 inputs organic raw materials P such as sewage sludge discharged from a bucket elevator 12 disposed on the side of the heating furnace body A to the transfer start ends B1a and B2a of the transfer paths B1 and B2 for evaporation. Is what you do.

The charging hopper 6 includes a raw material charging chamber 13 and a moisture adjusting agent chamber 14 for storing a moisture adjusting agent Q such as carbonized organic matter and zeolite by a partition plate 6b inside the hopper container 6a. A horizontal rotary rake 15 for reducing the cross-linking state of the organic raw material P charged therein is disposed in the raw material charging chamber 13, and the horizontal rotating rake 15 is disposed above the raw material charging chamber 13. A motor M1 for rotating and driving the horizontal rotary rake 15 is provided.

A supply mechanism 16 for supplying a predetermined amount of the water adjusting agent Q stored in the water adjusting agent chamber 14 to the transport start ends B1a and B2a of the evaporation transport paths B1 and B2 is provided in the moisture adjusting agent chamber 14. I have.

The supply mechanism 16 includes a water adjusting agent chamber 14.
An opening / closing plate 16a capable of opening and closing the lower opening and an opening / closing drive unit 16b for opening / closing the opening / closing drive 16b automatically open / close the opening / closing plate 16a in consideration of the amount of water contained in the organic material P.

When an organic carbonized material is used as the water adjusting agent Q, an organic material P carbonized by the present apparatus can be used. In this case, it is necessary to separately prepare a water adjusting agent. Cost can be reduced.

The evaporating conveyance paths B1 and B2
As a result, the organic raw material P supplied to the transport start ends B1a and B2a is transported toward the lower carbonization transport path B3, and the water content of the organic raw material P is removed along with the transport. P evaporates to such an extent that it can be carbonized while being transported through the carbonizing transport paths B3 to B7.

As shown in FIGS. 4 and 5, the evaporating transport paths B1 and B2 are provided with two paddles for transporting the organic material P into a semi-cylindrical body 17 having a substantially W-shaped cross section open at the upper side. The conveyor screws C and C are arranged to be parallel to each other and to be rotatable.

The paddle conveyor screw C can reduce the cross-linking state of the organic material P. The paddle conveyor screw C has a plurality of independent blades 19 spirally attached to a rotating shaft 18.

D is a crusher disposed in the downflow path 7 that connects between the transport end portions B1b and B2b of the evaporative transport paths B1 and B2 and the transport start end B3a of the lower carbonizing transport path B3. Which is composed of a plurality of crushing blades Db on the rotation axis Da.
Is fixed. Thereby, the downflow path 7
Is pulverized so as to cut off the organic material P that flows down, so that the crosslinked state thereof can be reduced.

If the crusher has a function of reducing the cross-linking state of the organic material P flowing down the downflow path 7, for example, two rolls are rotated so as to mesh with each other, and the organic material P is interposed therebetween. The structure which compresses and crushes P may be sufficient.

As shown in FIG. 6, each of the carbonizing conveying paths B3 to B7 has paddle conveyor screws C, C having the same configuration as described above arranged in a cylindrical body 20 having a substantially W-shaped cross section.
A plurality of degassing holes 20b are formed in the upper surface 20a of the cylindrical body 20 in two rows for discharging gas generated from the organic material P conveyed inside the cylindrical body 20 into the main heating section Aa.

By releasing the gas generated from the organic material P into the main heating section Aa, the gas is effectively burned in the main heating section Aa to save fuel, and the odor generated from the organic material P is released. Can be eliminated.

Each rotating shaft 18 of the paddle conveyor screw C
A sprocket 21 is fixed to one end of the motor, and a sprocket 22 is also fixed to a drive shaft of a motor M2 installed on a cooling tank 23 on the gantry T, and a roller chain 21 'is stretched over them. Accordingly, each paddle conveyor screw C is rotationally driven by the motor M2.

Further, the rotation shaft Da of the crusher D and the rotation shaft 18 of the carbonizing conveyance path B3 are also provided on the sprocket 2 different from the above.
4 and 24 are fixed, and the roller chain 25 is stretched over them, so that the crusher D
2, so as to rotate.

Through the charging hopper 6, the evaporating conveying paths B1,
The organic material P charged into the transport start ends B1a and B2a of B2 is supplied with paddle conveyor screws C and
While being conveyed toward each of the conveying end portions B1b and B2b by C, the water contained therein is evaporated and cut off by the blades 19 to reduce the cross-linked state thereof.

The organic raw material P conveyed to the conveying end portions B1b and B2b flows down into the downflow path 7 connected thereto, and the cross-linking state thereof is also reduced by the crusher D, so that the lower stage can be used. It is fed to the transport start end B3a of the carbonizing transport path B3.

The organic raw material P supplied to the transport start end B3a is conveyed toward the transport end B3b by the paddle conveyor screws C, C, and carbonized while the cross-linking state thereof is reduced. Will be Hereinafter, in the same manner, the organic raw material P is transferred to the lower carbonization conveying paths B4 to B4.
The carbonization treatment is performed while the cross-linking state is reduced while B7.

The transport end B of the lowermost transport path B7 for carbonization
7b, the cooling transport path F1, via the separation transport path E,
F2 is connected. The transport path E for separation is a cylindrical body 26
In addition, a transport screw 27 in which a blade 27b is formed in a spiral shape on a rotating shaft 27a is rotatably provided inside. In the middle part of the cylindrical body 26, the lowermost conveying path B for carbonization is provided.
7, a discharge port 26a is opened at the upstream end of the cylindrical body 26 in the transport direction, and a discharge port 26b is formed at the downstream end of the cylindrical body 26 in the transport direction. I have.

A roller chain 30 is stretched between a sprocket 28 fixed to the rotary shaft 27a and a sprocket 29 fixed to the drive shaft of the motor M3 installed on the cooling tank 23. Thus, the transport screw 27 can be driven to rotate.

The cylindrical body 26 is provided with a temperature sensor S for detecting the temperature of the organic material P conveyed inside the cylindrical body 26. The motor M3 is controlled to rotate forward and reverse according to the temperature detected by the temperature sensor S. It has become so.

That is, if the organic raw material P sent from the carbonization conveyance path B7 to the separation conveyance path E is not carbonized, its temperature is lower than the carbonized one, so that the temperature is reduced to the temperature. If the temperature detected by the sensor S indicates the uncarbonized organic material P, the motor M3 is rotated in the reverse direction to discharge the uncarbonized organic material P from the outlet 26a to the outside. I have.

The cooling transport paths F1 and F2 extend through the cooling tank 23 placed on the gantry T with the transport start and end portions of the cooling transport paths F1 and F2 projecting outward. They are provided with a transport screw 27 for transporting the organic material P along a water-tight cylindrical body 31 in a rotatable manner.

The cooling transport paths F1 and F2 are arranged in two stages, upper and lower, and a downstream path F1 'between the transport start end of the cooling transport path F1 and the transport end of the cooling transport path F2.
Contacted by In addition, at the transport end of the cooling transport path F2, a delivery port F for delivering the carbonized organic material P is provided.
2 'is formed.

The transport screw 2 of the cooling transport paths F1 and F2
7, a sprocket 32 is fixed to one end of the rotary shaft 27a, and a sprocket 33 is also fixed to a drive shaft of a motor M4 arranged at a lower portion of the gantry T. Have been. Thus, each transport screw 27 is driven to rotate by the motor M4.

A spraying nozzle 35 is provided in the cylindrical body 31 of the cooling transfer path F1 as a spraying means for spraying water or the like toward the organic material P conveyed inside. Water or the like is sprayed through the spray nozzle 35 toward the carbonized organic raw material P to wet and wet it and generate high-temperature steam in the cylindrical body 31. The organic raw material P can be activated so that it can adsorb substances contained in gas or liquid.

The cooling tank 23 is filled with a cooling liquid such as water, and the organic raw material conveyed inside the cooling tank 23 through the cylindrical bodies 31 and 31 of the cooling conveyance paths F1 and F2. It cools P.

Next, the operation of the present apparatus will be described assuming that the organic raw material P is sewage sludge. Since the water content of the sewage sludge which is not adjusted is about 83.2%, in this case, the water adjusting agent Q is mixed with the supply mechanism 16 so that the water content becomes about 70%.

The sewage sludge introduced into the evaporating conveyance paths B1 and B2 is finely cut off by the paddle conveyor screws C and C, and while the cross-linking state thereof is reduced, the subsequent carbonization conveying paths B3 to In B7,
The water is supplied to the downflow path 7 in a state where the water content is reduced to such an extent that carbonization can be performed well.

The sewage sludge flowing down the downflow path 7 is also fed to the transfer start end B3a of the lower carbonization transfer path B3 by the crusher D while reducing the bridging state thereof.

The sewage sludge is transferred to the carbonization conveyance paths B3 to
While being transported, B7 is gradually carbonized (finally, the moisture content is about 0.2%) and sent to the cooling transport path F1, but was not carbonized in the separation transport path E. Sometimes it is discharged to the outside through the discharge port 26a. The discharged uncarbonized sewage sludge may be returned to the input hopper 6 again.

The organic material fed to the cooling transport path F1 is gradually cooled while being transported, activated by the water sprayed from the spray nozzle 35, and then externally fed from the outlet F2 '. Sent to

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the invention. For example, the temperature in the main heating section of the heating furnace body may be appropriately set according to the type of the organic material to be carbonized, but if the organic material emits a foul odor, the set temperature may be increased slightly. If so, the odor can be reduced or eliminated.

In the above description, the paddle conveyor screw is provided in all the horizontal conveying paths. However, depending on the type and viscosity of the organic material, only the evaporating conveying path or the evaporating conveying path and the carbonized May be provided only in a part of the transport path for use.

In the above description, an example was described in which water was used as a cooling liquid for the carbonized organic material, but the cooling liquid may be water, liquid nitrogen, or the like.

[0050]

As is apparent from the above description,
According to the present invention, the organic material raw material is evaporating the contained water while reducing the cross-linking state during the horizontal conveyance by the evaporating conveyance path, and then is crushed by the crusher during the downward conveyance by the falling path, and further thereafter. Carbonization is performed while reducing the cross-linking state during horizontal transportation by the transportation path for carbonization. Therefore, even if it is an organic material having a high water content such as sewage sludge, desired carbonization treatment can be performed. That is, there is no possibility that the raw material adheres to the inner wall of the transfer path or the screw to block the transfer path, so that the transfer cannot be performed due to the blockage of the transfer path or maintenance work such as cleaning of the transfer path as in the related art. It is not necessary to reduce the operating efficiency and increase the cost.

In particular, the organic raw material is horizontally conveyed through the evaporating conveyance path to evaporate the water and is crushed by the paddle conveyor screw in the interior. Because of the horizontal transfer as described above, it becomes a dumpling, and it is difficult to achieve the expected carbonized state if it is horizontally transferred on the carbonization transfer path. During the downward transport by the downflow path between the transport path and the organic material in the dumpling state by crushing again by a crusher, the particle size is reduced, so that the dumpling state is eliminated, the subsequent carbonization transport path Is horizontally conveyed to obtain the desired carbonized product.

In addition, when the organic material is carbonized in the separation conveyance path, the conveyance screw is rotated forward to the outlet at the downstream end of the separation conveyance path. Is rotated in the reverse direction so that the organic material can be separated and conveyed to the discharge port at the upstream end of the separation conveyance path, thereby ensuring the production of a homogeneous product after the expected carbonization treatment. It is possible to put out.

[Brief description of the drawings]

FIG. 1 is a front view showing a part of the continuous organic carbonization apparatus of the present invention in a cutaway manner.

FIG. 2 is a cross-sectional view as viewed from one side of the above.

FIG. 3 is a cross-sectional view of the same as seen from the other side.

FIG. 4 is an enlarged plan view of a transport path for evaporation.

FIG. 5 is a perspective view thereof.

FIG. 6 is a perspective view of a conveying path for carbonization.

[Explanation of symbols]

 2 Air nozzle 7 Downflow path 17 Half cylinder 18 Paddle conveyor screw rotating shaft 19 Paddle conveyor screw blade 20 Cylindrical body 20b Deaeration hole 23 Cooling tank 26 Watertight cylinder 16a Discharge port 26b Delivery port 27 Transport screw 35 As a spraying means Nozzle for spraying A Heating furnace body B Horizontal conveying path group B1, B2 Evaporating conveying path B1b, B2b Conveying terminal B3 to B7 Carbonizing conveying path B3a to B7a Conveying start end C Paddle conveyor screw D Crusher E Separating conveying Path F1, F2 Conveyance path for cooling P Organic material S Temperature sensor

Continued on the front page (51) Int.Cl. ⁷ Identification code FI C05F 11/00 C05F 11/00 C10B 53/00 C10B 53/00 A C10L 5/46 ZAB C10L 5/46 ZAB 5/48 ZAB 5/48 ZAB (56) References JP-A-8-283743 (JP, A) JP-A-9-67580 (JP, A) JP-A-57-96084 (JP, A) JP-A-49-10898 (JP, A) Utility Model 3009966 (JP, U) JP 47-49802 (JP, B1) West German Patent Application Publication No. 2824286 (DE, A1) (58) Fields investigated (Int. Cl. ⁷ , DB name) C01B 31/02 101 B09B 3/00 302 C01B 31/10 C02F 11/00 C05F 11/00 C10B 53/00 C10L 5/46 ZAB C10L 5/48 ZAB

Claims (11)

(57) [Claims] 1. A horizontal conveying path group consisting of an evaporating conveying path inside a paddle conveyor screw installed at the uppermost stage and a carbonizing conveying path inside the same paddle conveyor screw installed in multiple stages below the heating furnace. In the organic raw material continuous carbonization device erected on the body, the conveyance end portion of the evaporating conveyance path and the conveyance start end of the uppermost one of the multi-stage carbonization conveyance routes are connected by a vertically flowing flow passage. And a crusher is arranged in the downflow path. 2. A transfer end of the lowest one of the multi-stage carbonization transfer paths is connected to an intermediate part of a separation transfer path in which a transfer screw controlled in forward and reverse rotation is housed in a cylindrical body. 2. The continuous organic material raw carbonizer according to claim 1, wherein an upstream end of the separation conveyance path in the conveyance direction is used as a discharge port, and the downstream end is used as a discharge port connecting the cooling conveyance path. 3. The organic material raw material continuous carbonizing apparatus according to claim 1, wherein the evaporating conveyance path comprises a paddle conveyor screw rotatably provided in a half-cylinder having an open upper side. 4. A continuous carbonizing apparatus for organic raw materials according to claim 1, wherein the carbonization conveying path comprises a paddle conveyor screw rotatably provided in a cylindrical body having a plurality of deaeration holes formed on an upper side thereof. . 5. A cooling transfer passage having a structure in which a transfer screw is provided inside a cylindrical body, and which is provided through a cooling tank filled with a cooling liquid. Or the organic raw material continuous carbonizing apparatus according to 4. 6. A cooling conveying path, wherein water,
6. The continuous organic material carbonization apparatus according to claim 1, further comprising a spraying means for spraying a cooling liquid such as liquid nitrogen. 7. A transporting path for separation is provided with a temperature sensor for detecting the temperature of an organic material in its cylindrical body, and the transporting screw inside the cylindrical body is rotated forward and backward according to the temperature detected by the temperature sensor. Claims 1, 2, 3, 4, 5
Or the organic material continuous carbonization apparatus of 6. 8. An evaporator according to claim 1, wherein an air nozzle for blowing fresh air into the interior of the heating furnace body is disposed at a position above the conveying path for evaporation. Organic material continuous carbonization equipment. 9. An evaporating step for evaporating the water content while reducing the cross-linking state of the organic raw material during the horizontal transfer by the evaporating transfer path, and a crushing step for crushing the organic raw material by the crusher during the downward transfer by the downflow path. A carbonization step of sequentially carbonizing the organic material while reducing the cross-linking state of the organic material during horizontal conveyance by the carbonization conveyance path. 10. An evaporating step of evaporating the water content while reducing the cross-linking state of the organic material during the horizontal transfer by the evaporating transfer path, and a crushing step of crushing the organic raw material by the crusher during the downward transfer by the downflow path. A carbonization step of carbonizing while reducing the cross-linking state of the organic material during horizontal conveyance by the carbonization conveyance path, and detecting whether or not the organic material is carbonized by the temperature of the organic material in the separation conveyance path, During transport, the transport screw is rotated forward to the outlet at the downstream end of the separation transport path, and when not carbonized, the transport screw is rotated reverse to discharge the upstream end of the separation transport path. A method for continuously carbonizing an organic material, comprising sequentially performing a separation step of transporting the organic material to an outlet. 11. An evaporating step of evaporating the water content while reducing the cross-linking state of the organic raw material during the horizontal transport by the evaporating transport path, and a crushing step of crushing the organic raw material by the crusher during the downward transport by the down flow path. A carbonization step of carbonizing while reducing the cross-linking state of the organic material during horizontal conveyance by the carbonization conveyance path, and detecting whether or not the organic material is carbonized by the temperature of the organic material in the separation conveyance path, During transport, the transport screw is rotated forward to the outlet at the downstream end of the separation transport path, and when not carbonized, the transport screw is rotated reverse to discharge the upstream end of the separation transport path. A separation step in which the organic material is transported to the outlet,
A method of continuously carbonizing an organic material raw material, comprising sequentially performing a cooling spraying step of spraying a cooling liquid such as water or liquid nitrogen onto an organic material being transported by a cooling transport path connected to the outlet at the downstream end. .