JP2009108210A - Particulate removing apparatus large-sized charcoal kiln - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for effectively removing particulate generating in large quantity from a large-sized charcoal kiln. <P>SOLUTION: The particulate removing apparatus is connected to a smoke discharging port 1a for discharging combustion smoke of a large-sized charcoal kiln 1 to remove particulate from exhaust gas. The particulate removing apparatus is composed of a high-temperature smoke-burning device 16 connected to the smoke discharging port 1a of the charcoal kiln 1 and burning the smoke discharged from the smoke discharging port 1a with a high-temperature burner 13 at a high temperature (≥800°C), a cooling device 20 connected to the high-temperature smoke-burning device 16 and lowering the temperature of the hot smoke discharged from the high-temperature smoke-burning device 16 to ≤200°C, a smoke filtering device 24 connected to the cooling device 20 and filtering and removing particulates from the cooled smoke discharged from the cooling device 20, and an exhaustion fan 44 connected to the smoke filtering device 24 and exhaust the gas discharged from the smoke filtering device 24 into atmosphere. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a large-sized charcoal kiln capable of producing long wood of several meters long, removes a large amount of smoke generated from the kiln, removes exhaust materials such as soot dust, and is safe The present invention relates to a dust removing device for a large charcoal kiln that can be discharged into the atmosphere.

Conventional large-scale charcoal-type charcoal kiln for carbonizing long wood such as building wood scraps and thinned wood used for house pillars and beams, etc. (Patent Document 1) has been proposed.
Since the charcoal kiln is long from the front of the kiln to the back, there is a difference in carbonization, and in order to increase the carbonization efficiency, the charcoal kiln can be made with a time difference. For this purpose, the charcoal kiln is provided with a plurality of gradation chimneys with open / close valves at regular intervals on the low side wall surface, and when the degree of carbonization is observed, the closing valve is moved from the front of the kiln to the back. It can be made in order to make charcoal.
JP 2001-181646 A

However, in the time difference charcoal-type charcoal kiln, smoke containing a large amount of soot is discharged from the smoke outlet, and there is a risk of air pollution if discharged without processing the smoke as it is. If the apparatus for treating smoke emission using a plate was used as it was, a large amount of smoke could not be treated, and it was not possible to prevent dust from being scattered around.
Furthermore, a large amount of smoke containing soot is discharged from the smoke-stacked chimney provided on the low-side wall surface of the charcoal kiln. However, in Patent Document 1, harmful soot is released without processing the smoke as it is. Therefore, there has been a problem that such a charcoal kiln installation and use permit cannot be constructed because it cannot be obtained from the local government or the competent authority that performs the license.
Therefore, the present invention eliminates smoke generated in a large amount during the carbonization process of wood in a large charcoal kiln, without exhausting it directly into the atmosphere. It is an object of the present invention to provide a dust removal device that makes it possible to purify flue gas to such an extent that the air is no longer polluted and then discharge it into the air.

The soot removal device for a large charcoal kiln of the present invention for solving the above-mentioned problems is a soot removal device used to remove soot from the exhaust gas by connecting to a smoke exhaust port for discharging the flue gas of the large charcoal kiln. The dust removal device is connected to a smoke exhaust port of the charcoal kiln, and the exhaust gas high-temperature combustion device in which the exhaust gas discharged from the smoke exhaust port is incinerated at a high temperature of 800 ° C or higher by a high-temperature burner; A cooling device connected to the high-temperature flue gas combustion device and reducing the temperature of the high-temperature flue gas discharged from the high-temperature flue gas combustion device to 200 ° C. or less, and connected to the cooling device and discharged from the cooling device. And a soot filter that removes soot and dust from the cooled exhaust smoke, and a wind exhauster that is connected to the soot filter and exhausts the exhaust gas discharged from the soot filter into the atmosphere.
And, the dust is efficiently removed from a large amount of flue gas generated during the carbonization process of the wood in the charcoal kiln, and the exhaust gas can be safely discharged into the atmosphere.

  The invention described in claim 2 is a water-cooled type in which in the invention described in claim 1 above, cold water is allowed to flow through an internal flow channel, and heat exchange between the high-temperature flue gas and the cold water is performed to cool the high-temperature flue gas. It is characterized by that.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the large charcoal kiln has a depth capable of accommodating a long log material, and is constant in the longitudinal direction at the lower part of the longitudinal outer wall. A large charcoal kiln equipped with an air supply adjustment port that allows adjustment of the air supply amount at the front and a smoke exhaust port that discharges combustion exhaust gas at the rear is used. It is characterized by that.

Since this invention is the said structure, there exist the following effects.
As a first step, a large amount of soot discharged together with combustion gas generated in the carbonization process of a large amount of wood housed in a large charcoal kiln is a high temperature of 800 ° C. or higher in the exhaust gas high-temperature treatment device as a first step. It is possible to greatly reduce the amount of dust contained by performing the combustion treatment at the same time, and to make the harmful chemical substances generated at the same time incombustible and decomposed by the high temperature to make them harmless.
As a second stage, the high-temperature flue gas discharged from the flue gas high-temperature treatment apparatus is cooled and the temperature is lowered to 200 ° C. or lower, thereby preventing the apparatus from being damaged due to the high temperature in the next third stage. The temperature of the gas that is removed in advance and finally discharged is lowered.
At this time, as the cooling device to be used, it is more effective to use a cooling device using cold water that can cope with a large amount of smoke.
As a third stage, it becomes possible to sufficiently remove the soot and dust in the exhaust gas from the exhaust gas cooled to 200 ° C. or less to the extent that there is no risk of air pollution by the smoke filter device.
The exhaust gas that is finally discharged becomes a temperature of 200 ° C. or less, which is a temperature at which the dust containing harmful substances is largely removed in each part of the apparatus and is made harmless to the environment. Can be released inside.

  In the invention according to claim 3, the large charcoal kiln can store a long thinned log or the like as it is, and the combustion color and flame size of the wood inside the charcoal kiln from the combustion inspection port on the outer wall. While looking at the combustion inspection port from the front to the back of the charcoal kiln, opening and closing the air supply adjustment port and changing the opening size adjusts the amount of air to be fed and overburns. It is possible to improve the carbonization rate and prevent the production efficiency of charcoal obtained from raw wood.

The charcoal firing kiln 1 according to the present invention will be described below with reference to the drawings showing the embodiment of the present invention. The size of the charcoal kiln 1 is a depth that can accommodate a long log such as thinned wood. A cylindrical combustion inspection port 3 is provided at regular intervals in the longitudinal direction, and the combustion condition of the wood is visually confirmed with a time difference from the combustion inspection port 3 to the front of the charcoal kiln 1 in order. Can be made.
For example, the large charcoal kiln 1 has a length of about 9 m in order to store a long thinned log as it is, has a volume of about 40 m ^{3 and} is made of a material having high heat resistance so that it can withstand high temperatures. To manufacture.
And the said combustion inspection port 3 is heat-resistant so that the color of the flame emitted when the wood inside a kiln combusts can be seen by attaching a cylindrical body to the holes provided in the lower portions of both outer walls of the charcoal kiln 1. Glass windows are provided.

  As shown in FIGS. 1 and 3, a door 47 having an air supply adjustment port 2 that enables adjustment of the air supply amount is provided above the large charcoal kiln 1. It is attached so that it can be opened and closed by pulling up with the door opening and closing crane 46.

The dust removing device of the present invention is connected to a smoke exhaust port 1a provided at the rear of such a large charcoal kiln 1.
As shown in FIG. 1, a smoke exhaust guide pipe 4 is connected to the smoke exhaust port 1a, and the smoke exhaust guide pipe 4 collects useful wood vinegar contained in the exhaust gas. The wood vinegar liquid collecting device 7 is connected.
This wood vinegar liquid collecting device 7 is provided with a drain outlet at the bottom, a smoke inlet connected to the smoke induction pipe 4 for introducing the smoke from the charcoal kiln 1, and a smoke exhaust for discharging the internal smoke. A smoke evacuation box 9 having a mouth is formed, and a cooling water tank 8 is provided at the center of the space inside the smoke evacuation box 9 to exchange heat with an external water supply pipe and drain pipe. Use the one with the specified structure.
And the high-temperature flue gas introduced from the charcoal kiln 1 is cooled by the cooling water tank 8 by the wood vinegar liquid collecting device 7, and the wood vinegar liquid M is extracted from the flue gas. The extracted wood vinegar liquid M is It flows out of the box through a discharge pipe provided at the drainage port at the bottom of the smoke box 9.
Therefore, if a container is placed under the discharge pipe, the flowing vinegar liquid M can be temporarily stored, and the vinegar liquid M can be further subdivided into bottles and sold as a vinegar liquid product as it is.

In the present invention, the wood vinegar liquid collecting device 7 does not necessarily need to be provided, but if provided, so that smoke can be sent to the next high smoke exhausting high temperature combustion device 10 without passing through the wood vinegar liquid collecting device 7, In the middle of the flue gas guide pipe 4, the wood vinegar liquid sampling device 7 is connected via an open / close switching device 6 by a lever that is selected and opened only on either the wood vinegar liquid collection device 7 side or the detour pipe 5 side. A bypass pipe 5 connected to the smoke exhaust guide pipe 11 on the exhaust side can be provided.
By doing so, it becomes possible to send the flue gas to the flue gas high-temperature combustion device 10 without passing through the wood vinegar liquid collecting device 7, and harmful substances contained in wood waste materials used for residential pillars and the like If you want to avoid collecting because of the risk of deterioration of the quality of the wood vinegar liquid, open the bypass pipe 5 side by operating the lever of the opening / closing switching device 6 and do not pass the smoke through the wood vinegar liquid sampling device 7 By sending to an apparatus, it becomes possible to avoid mixing of harmful substances into the obtained wood vinegar.

Next, to the flue gas induction tube 11, a high temperature flue gas combustion apparatus 10 for incinerating the discharged flue gas at a high temperature of 800 ° C. or higher by a high temperature burner 13 for burning kerosene is connected.
This high-temperature flue gas combustion apparatus 10 has a high-temperature burner 13 facing a smoke inlet 17 for taking in the smoke into a combustion furnace 16 having a length of about 3 m and a diameter of about 60 cm having a smoke outlet 18 for discharging the smoke. Is provided.
Then, a temperature sensor 15 is provided in the combustion furnace 16, and the temperature sensor 15 senses it. Based on the temperature in the furnace, the output of the high temperature burner 13 is adjusted so that the furnace temperature becomes 810 ° C or higher. A temperature controller 14 of a high-temperature burner that controls in a range of about 800 to 1000 ° C. is provided.
By this temperature control, the introduced flue gas in the combustion furnace 16 is burned at a high temperature of 800 ° C. or higher.

Next, the exhaust gas high-temperature combustion apparatus 10 includes a cooling device 20 that lowers the temperature of the high-temperature exhaust gas discharged from the exhaust gas high-temperature combustion apparatus 10 via the exhaust gas induction pipe 12 to 170 ° C. to 200 ° C. or less. Are connected.
In order to form a contact surface with a large area through which the high-temperature flue gas having a temperature of 800 ° C. or more that is fed can pass through the cooling device 20, 18 steel pipes having an inner diameter of about 70 mm and a length of 3 m are equally spaced. A flow channel forming material placed in parallel is provided.
In this apparatus, cold water is allowed to flow through the flow channel of the flow channel forming material so that the high temperature smoke can be cooled by heat exchange between the high temperature smoke and the cold water.

Next, the cooling device 20 is continuously provided with a soot filtering device 24 that filters and removes soot and dust from the cooled exhaust smoke discharged through the smoke induction tube 22.
The soot filter device 24 is continuously provided with an exhaust fan 44 for exhausting the exhaust gas discharged from the soot filter device 24 through the chimney 26 into the atmosphere.

  Although the apparatus of the present invention has been outlined above, the dust removal apparatus of the present invention will be described in detail along the flow of smoke based on FIGS.

FIG. 2 shows a case where the wood vinegar liquid collecting device 7 is not provided, and the smoke discharged from the large charcoal kiln 1 is sucked from a smoke guide pipe 11 connected to a smoke outlet 1a provided at the rear of the kiln. 17 is sent to the combustion furnace 16 of the flue gas high-temperature combustion apparatus 10.
In the combustion furnace 16, most of the combustible substances in the flue gas are incinerated by the high-temperature burner 13 at a high temperature of 800 ° C or higher.
As shown in FIG. 4 (showing a state where the smoke filter device 24 shown by a broken line is removed), the combustion gas that has become a high temperature of 800 ° C. or higher as shown in FIG. It is sent from the smoke inlet 19 to the cooling device 20 through the pipe 12.
The cooling device 20 is provided with a flowing water channel forming material 28 having a contact area with a large area using a steel pipe in a meandering state, and by flowing cold water around the flowing water channel formed in the flowing water channel forming material 28, Performs heat exchange between smoke and cold water. And the temperature of the flue gas which was high temperature 800 degreeC or more here is cooled to 170 degreeC-200 degrees C or less.
The cooling device 20 is provided with a water supply tank 29 beside the flow channel forming material 28 so that the water supply tank 29 can be automatically replenished with cold water from a water supply 30 by a water supply controller 31. The cold water stored in the water supply pipe 32 can be poured into the water flow path in the water flow path forming member 28.
Further, the water flow path forming member 28 is configured such that water vapor generated by the overheating of cold water can be discharged to the outside through the exhaust hole 34 provided on the water supply tank 29 through the exhaust port 34 of the water flow path forming member 28.

Next, the smoke discharged by the cooling device 20 to 200 ° C. or less is discharged from the smoke outlet 21 of the soot filter 24 through the smoke outlet 21 provided in the cooling device 20 through the smoke guide pipe 22. It is sent inside the device.
The smoke exhaust guide pipe 22 is provided with a switching damper 35 and a cold air suction damper 36. Even when the temperature is 200 ° C. or lower, the exhaust gas is still at a very high temperature compared with the outside air. To lower the temperature.
The soot filtering device 24 incorporates a bag filter 37 to filter the soot from the smoke, and the filtered smoke is sent from the smoke outlet 25 to the chimney 26.
The solid material obtained by filtering with the bag filter 37 is collected by a screw conveyor 38 provided under the bag filter 37, collected through a rotary valve 39 and disposed of.
The smoke filter device 24 includes an air compressor 40, and sends out smoke that has been filtered by mixing external air on the bag filter 37 via the air supply pipe 41 from the smoke outlet 25 to the chimney 26.

The smoke filtering device 24 discharges the filtered smoke from the smoke outlet 25 through the chimney 26 to the atmosphere from the exhaust outlet 27.
At that time, an exhaust fan 44 for exhausting the exhaust gas discharged from the soot filtering device 24 into the atmosphere is continuously provided in the middle of the chimney 26.
The chimney 26 can be exhausted by the switching damper 42 and the exhaust gas adjusting damper 43 so that it can be discharged into the atmosphere while being inspected for any abnormality at the gas inspection port 45.

  INDUSTRIAL APPLICABILITY The present invention is used for treating flue gas generated in large quantities in a large charcoal kiln capable of storing long wood such as thinned logs and pillars obtained by demolishing a house in the same length. Although it is a soot removal device, there are some types of conventionally used large-scale combustion furnaces that generate large amounts of soot, and they can be used as dust removal devices such as kilns for manufacturing such combustion furnaces and ceramics. There is a possibility,

It is a perspective view which shows the external appearance of the whole this invention. It is a conceptual diagram which shows the structure of a dust removal apparatus. 1 is an overall perspective view of the present invention. It is a perspective view of the principal part of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Carbonization kiln 1a Smoke exhaust port 2 Air supply adjustment port 3 Combustion inspection port 5 Detour circuit 6 Opening and closing switching device 7 Wood vinegar liquor sampling device 8 Cooling water tank 9 Smoke exhaust retention box 10 Smoke exhaust high temperature combustion device 11 Smoke exhaust induction tube DESCRIPTION OF SYMBOLS 12 Smoke exhaust induction pipe 13 High temperature burner 14 Temperature control part of high temperature burner 15 Temperature sensor 16 Combustion furnace 17 Smoke inlet 18 Smoke outlet 19 Smoke inlet 20 Cooling device 21 Smoke exhaust port 22 Smoke induction pipe 23 Smoke inlet 24 Smoke filter device 25 Smoke exit 26 Chimney 27 Exhaust exit 28 Flow channel forming material 29 Water supply tank
DESCRIPTION OF SYMBOLS 30 Water supply device 31 Water supply regulator 32 Water supply pipe 33 Exhaust port 34 Exhaust port 35 Switching damper 36 Cold-air suction damper 37 Bag filter 38 Screw conveyor 39 Rotary valve 40 Air compressor 41 Air supply pipe 42 Switching damper 43 Exhaust gas adjustment damper 44 Exhaust gas adjustment 45 Gas inspection port 46 Door opening / closing crane 47 Door

Claims (3)

It is a soot removal device that is used to remove soot from the exhaust gas by connecting to a smoke exhaust port that discharges combustion smoke of a large charcoal kiln,
The dust removal device is connected to a smoke exhaust port of the charcoal kiln, and the exhaust gas high-temperature combustion device in which the exhaust gas discharged from the smoke exhaust port is incinerated at a high temperature of 800 ° C or higher by a high-temperature burner;
A cooling device that is connected to the high-temperature exhaust gas combustion device and lowers the temperature of the high-temperature exhaust gas discharged from the high-temperature smoke combustion device to 200 ° C. or less;
A soot filter that is connected to the cooling device and filters soot and dust from the cooled exhaust gas discharged from the cooling device;
Continuing to the soot filter device, and comprising an exhaust device for exhausting the exhaust gas discharged from the soot filter device into the atmosphere,
A dust removing apparatus for a large charcoal kiln, wherein dust is efficiently removed from a large amount of flue gas generated during the carbonization process of wood in the charcoal kiln, and the exhaust gas can be safely discharged into the atmosphere.   2. A dust removal apparatus for large-sized charcoal kilns according to claim 1, wherein cold water is allowed to flow through an internal flow channel to exchange heat between the high-temperature flue gas and the cold water to cool the high-temperature flue gas. .   A large charcoal kiln has a depth that can accommodate long log materials, and has a combustion inspection port at a certain interval in the longitudinal direction at the lower part of the outer wall on the long side, and the amount of air supply is adjusted at the front part. 3. A dust removing apparatus for a large charcoal kiln according to claim 1 or 2, wherein the air feed adjusting port is a large charcoal kiln having a smoke exhaust port for discharging combustion flue gas at the rear.

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