JP2013248596A - Soil reforming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soil reforming apparatus which is compatible with the environment and materializes effective, efficient, inexpensive, and short-term soil reforming.SOLUTION: A soil reforming apparatus 1 includes: a combustion chamber 100 which receives combustion heat and raise temperature; a first transportation conduit 2 which is installed in the combustion chamber 100 and transports charged soil to be reformed; a second transportation conduit 3 which is installed in the combustion chamber 100 and transports soil which is passed through the first transportation conduit 2; a combustion device 5 which burns a biomass fuel and sends combustion heat into the combustion chamber; and a gas delivery channel 4 which delivers generated gas to the combustion device 5 through the first transportation conduit 2. The first transportation conduit 2 and the second transportation conduit 3 have rotatable screws 21 and 31 which transport soil, respectively.

Description

  The present invention relates to a soil reforming apparatus that modifies soil that contains a large amount of moisture and oil or contains impurities such as sludge and obtains soil that can be used for general purposes.

  Of course, land is required to construct a building as well as to form farmland and cultivated land. These sites are often exposed to various environments and may contain a lot of moisture and oil, or may contain impurities such as sludge and organic matter. These soils are difficult to construct as they are and to be used for specific purposes such as farmland and cultivated land. Or soil and sludge from factories and sewage may cause the soil to contain a large amount of impurities.

  If soil containing impurities from these sludge and sewage is left untreated, it may become a foul odor or pollution. Of course, as described above, it is difficult to use for specific purposes or as a construction site. Soil containing a large amount of impurities, moisture, and the like exists also in general places, and it is required to modify these general soils.

  Moreover, the soil which exists in various land may have received various pollution not only impurities, such as a water | moisture content, oil content, sludge. For example, soil may be contaminated with factory effluent or mine effluent. Alternatively, natural disasters can cause contaminants to enter the soil. For example, when seawater reaches deeply on land due to a tsunami or a large wave, the soil may be contaminated with salt or inorganic components. For example, a large tsunami caused by recent earthquakes in Japan may cause salt damage to land over a wide area.

  Alternatively, soil may be contaminated by radiation due to a failure or accident of a nuclear power generation device. If the wastewater from the factory and the treatment of waste liquid are insufficient, the soil may be contaminated with toxic substances, toxic organic substances, and toxic inorganic substances.

  There is a need to effectively and efficiently improve general soil containing impurities that require such modification. This is because if this general soil is left unmodified, as mentioned above, pollution problems will occur or the land will not be used effectively. On the other hand, if general soil is reformed, land can be used effectively and various problems can be solved.

  In the modification of general soil containing impurities, a technique for soil modification using a modifying material such as lime or bentonite has been proposed (see, for example, Patent Document 1).

JP 2004 197047 A

  Patent Document 1 discloses a technique for modifying soil by mixing clay minerals and an amount of lime that can be neutralized into sludge soil containing impurities and contaminants.

  The technique disclosed in Patent Document 1 aims to improve soil by mixing a specific substance that neutralizes these in a state where the soil is generally acidic or alkaline. It is said. These specific substances such as lime are generally used, and the technique of Patent Document 1 proposes a more specific device for using these specific substances.

  As described above, in the prior art, it is common to mix a solid material having the property of modifying with soil. This mixing of the solid material for reforming may be performed at the site that requires soil reforming, or the soil that needs reforming is collected and reformed at a site such as a factory before being put on site. May return.

  However, in the prior art represented by patent document 1, it is necessary to use many modifiers, such as lime and bentonite. There is also a problem that the cost required for soil modification becomes large by using many of these modifying materials. In addition, a cement-based solidifying material may be added as a modifying material, but problems such as elution of hexavalent chromium and the change of soil quality to high alkali may occur. These are elements that need to be taken into consideration in the recent increase in awareness of environmental issues.

  Moreover, since the curing period is required for soil reforming by using the modifying material, there is a problem that the construction period becomes long. If the construction period is long, the construction cost will be high. On the other hand, there are many cases that require soil modification, and there is a demand for efficient and low-cost soil modification. In particular, it is often the administrative district that wants to improve the soil, and since the business operator performs soil modification at the request of the administrative district, it is clear that the construction period and material costs are clear and low for the client as well. It is very suitable.

  Under the circumstances as described above, there is a demand for an efficient and effective soil reforming apparatus that is highly environmentally friendly and has low cost and construction period.

  In addition, in the current soil reforming, soil is dug up and collected in the land that needs to be reformed, and is transported to the factory or work place where the soil reformer is installed and reformed. The modified soil is transported again and installed on the land that needs modification. In this case, transportation of the soil is required, which is undesirable for the environment, such as generation of carbon dioxide during transportation.

  Or even if a soil reformer is installed in the land which needs soil modification, a soil reformer processes by a batch system. For this reason, it is necessary to throw in and collect | require required soil to a soil reformer each time. This is a very inefficient process.

  In view of the above problems, an object of the present invention is to provide a soil reforming apparatus that is environmentally friendly and realizes low-cost, short-term soil reforming that is efficient and effective. In addition, the present invention provides a soil reformer that has a high processing capacity and does not generate an environmental load due to transportation.

  The soil reformer of the present invention is provided with a combustion chamber that raises the temperature by receiving combustion heat, a first transport pipe that is installed in the combustion chamber and transports the input soil to be reformed, and the combustion chamber. A second transport line that transports the soil that has passed through the first transport path, a combustion device that burns biomass fuel and sends combustion heat to the combustion chamber, and a gas generated in the first transport path to the combustion device A gas delivery path for delivery, and each of the first delivery pipeline and the second delivery pipeline has a rotatable screw for carrying soil.

  Since the soil reforming apparatus of the present invention performs reforming with a focus on dehydration of water, it does not require many modifying materials such as lime, cement and bentonite. As a result, the cost and work period required for reforming can be reduced. In addition, since many of these modifiers are not required, the problem of impurities and environmentally hazardous substances remaining in the soil can be solved.

  Moreover, the soil reformer of this invention uses biomass fuel as a fuel of combustion heat required for dehydration. When the biomass fuel is burned, ash which is a burnout of the biomass fuel is generated together with the combustion heat, and this ash is also sent to the soil to be reformed together with the combustion heat. In particular, as the ash is sent to the soil together with the combustion heat, the soil undergoes a chemical modification by the combustion ash while undergoing a reduction in moisture and oil due to the dehydration, so that the soil is more fully modified. Is called.

  Moreover, the soil reforming apparatus of this invention is installed in the place which needs soil reforming, and can modify soil one after another by sequential treatment. For this reason, the environmental load by the conveyance of soil etc. is not caused. Furthermore, since the gas generated in the heating process can be used as a combustion fuel, the combustion efficiency is improved, and the reduction of fuel and the environmental load based on this can be realized.

It is a block diagram of the soil improvement apparatus in Embodiment 1 of this invention. It is a schematic diagram which shows the characteristic of soil. It is a side view of the combustion apparatus in Embodiment 2 of this invention.

  A soil reformer according to a first aspect of the present invention includes a combustion chamber that receives combustion heat and raises the temperature, and a first transport pipe that is installed in the combustion chamber and transports the input soil to be reformed. Generated in the first transport path, a second transport pipe that is installed in the combustion chamber and transports the soil that has passed through the first transport path, a combustion device that burns biomass fuel and sends combustion heat to the combustion chamber A gas delivery path for delivering the gas to be burned to the combustion device, and each of the first transport line and the second transport line has a rotatable screw for transporting the soil.

  With this configuration, the soil reformer can realize primary drying and secondary drying, and can effectively modify the soil.

  In the soil reforming apparatus according to the second invention of the present invention, in addition to the first invention, each of the first transport pipe and the second transport pipe has an internal space in which a screw can be accommodated, and combustion The chamber heats the internal space of each of the first transport pipe and the second transport pipe with combustion heat.

  With this configuration, the soil reformer can perform primary drying in the first transport pipeline and secondary drying in the second transport pipeline.

  In the soil reforming apparatus according to the third invention of the present invention, in addition to the first or second invention, the first transport pipe sends the gas generated from the soil transported by the combustion heat into the gas delivery path.

  With this configuration, the soil reformer can effectively use the gas generated from the soil to be reformed for combustion.

  In the soil reforming apparatus according to the fourth invention of the present invention, in addition to any of the first to third inventions, the screw extends along the extending direction of the first conveying pipe and the second conveying pipe. To do.

  With this configuration, each of the first transport pipeline and the second transport pipeline can reliably transport the soil in a predetermined direction.

  In the soil reformer according to the fifth aspect of the present invention, in addition to the third aspect of the invention, the gas delivery path delivers exhaust gas, water vapor and combustion gas generated in the first transport pipeline.

  With this configuration, the soil reformer can perform combustion using gas from the soil.

  In the soil reformer according to the sixth aspect of the present invention, in addition to any of the first to fifth aspects of the invention, the combustion device uses a gas from the exhaust gas delivery path in addition to the biomass fuel for combustion. Generate heat.

  With this configuration, the combustion apparatus can perform combustion with less fuel.

  In addition to any one of the first to sixth inventions, the soil reforming apparatus according to the seventh invention of the present invention further includes a feeder for feeding the soil to be reformed into the first transport pipeline.

  With this configuration, the soil reformer can perform work in a place that requires soil modification.

  In addition to any one of the first to seventh inventions, the soil reformer according to the eighth invention of the present invention further includes a discharger that discharges the soil transported by the second transport pipeline.

  With this configuration, the soil reformer can supply the modified soil to the land.

  In the soil reformer according to the ninth aspect of the present invention, in addition to any one of the first to eighth aspects, the biomass fuel is at least one of a wood chip, a bamboo chip, a bioethanol fuel and a biodiesel fuel. Including one.

  With this configuration, the combustion apparatus can reduce the environmental load.

  In the soil reforming apparatus according to the tenth invention of the present invention, in addition to any of the first to ninth inventions, the combustion apparatus has a double structure of an outer cylinder and an inner cylinder that can rotate coaxially. Ventilation that supplies air to the inner cylinder and the inner space of the combustion cylinder by utilizing the gap between the main cylinder, the combustion cylinder that burns the combustion agent, connected to the tip of the cylinder, and the outer cylinder and the inner cylinder The main body cylinder and the combustion cylinder have an upward inclination with respect to the horizontal plane, and the ventilation path supplies 30% to 50% of the total air volume that can be supplied to the internal space of the inner cylinder. Then, 50% to 70% of the total amount of air that can be supplied is supplied to the internal space of the combustion cylinder.

  With this configuration, the combustion apparatus can efficiently generate combustion heat.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  (Embodiment 1)

  First, the general outline of the soil reformer will be described.

(Overview)
FIG. 1 is a block diagram of a soil reforming apparatus according to Embodiment 1 of the present invention. The soil reformer 1 includes a combustion chamber 100, a first transport pipe 2, a second transport pipe 3, a combustion apparatus 5, and a gas delivery path 4.

  The combustion chamber 100 receives the combustion heat and raises the temperature. As shown in FIG. 1, the combustion chamber 100 includes the first transport pipe 2 and the second transport pipe 3 inside, and forms the entire outer shape of the soil reformer 1. The 1st conveyance pipeline 2 is installed in the inside of this combustion chamber 100, and conveys the soil for reforming thrown in. Moreover, since the 1st conveyance pipeline 2 is installed in the inside of the combustion chamber 100, it receives the heat by the combustion heat which the combustion chamber 100 receives. The 1st conveyance pipeline 2 dries this soil to convey by the heat which receives, while conveying the soil for modification in the length direction.

  The second transport pipeline 3 transports the soil that has passed through the first transport pipeline 2. For this reason, the 1st conveyance pipeline 2 and the 2nd conveyance pipeline are connected by the connection pipeline 11. FIG. The connection pipeline 11 sends the soil that has been conveyed through the first conveyance pipeline 2 and reached the end of the first conveyance pipeline 2 (on the connection pipeline 11 side) to the second conveyance pipeline 3.

  The second transport pipeline 3 is installed inside the combustion chamber 100 in the same manner as the first transport pipeline 2. For this reason, the 2nd conveyance pipeline 3 is heated from the outside by the combustion heat inside combustion chamber 100. The 2nd conveyance pipeline 3 promotes drying, conveying soil in the length direction.

  Here, the first transport pipeline 2 has a screw 21, and the second transport pipeline 3 has a screw 31. Each of the screws 21 and 31 is rotatable, and by this rotation, the soil placed on the blades included in each of the screws 21 and 31 can be transported.

  The combustion device 5 applies combustion heat to the combustion chamber 100. The combustion device 5 generates combustion heat by generating combustion using various fuels. In particular, the combustion device 5 generates combustion heat by burning biomass fuel. Since a part of the combustion device 5 is installed inside the combustion chamber 100, the combustion heat generated by the combustion can be sent to the combustion chamber 100 as it is.

  The gas delivery path 4 delivers gas generated by heating the soil of the first transport pipeline 2 to the combustion device 100. The gas delivery path 4 connects the first transport line 2 and the combustion device 5. Even if it does not reach the inside of the combustion device 5 directly, it suffices to reach the combustion space generated by the combustion device 5. The combustion device 5 can further obtain combustion energy by the gas delivered from the gas delivery path 4.

  Thus, the soil reforming apparatus 1 is configured by using the combustion chamber 100 as a basic outline and providing the combustion chamber 100 with some other elements. The combustion heat taken into the combustion chamber 100 heats the first transport pipeline 2 and the second transport pipeline 3, and the combination of heating in each of them realizes soil reforming. In particular, the heating and drying up to the extent that exhaust gas is generated is performed in the first pipeline 2 and the role is shared so that the final heating and drying is performed in the second pipeline 3, thereby improving the efficiency of combustion. And soil modification can be balanced.

(Soil problem)
Here, the problem of soil that requires modification will be described. The inventor analyzed the problems of the soil that needs to be improved while studying and analyzing the problems of the conventional technique for modifying the soil using a solidifying material or the like. The inventor has conceived that soil is not only composed of soil particles but also composed of three elements: soil particles, moisture / oil, and air. FIG. 2 is a schematic diagram showing soil characteristics. As shown in FIG. 2, the soil includes not only soil particles but also three elements: soil particles, moisture / oil, and air. The soil changes its properties by increasing and decreasing the moisture and oil content. That is, if the moisture / oil content increases, the soil becomes loose, and if the moisture / oil content decreases, the soil becomes hard. The improvement of soil is centered on adjusting the characteristics due to the hardness of the soil according to the purpose of use of the soil.

  Based on such analysis results, the inventor has determined the moisture and oil content contained in the soil rather than mainly changing the chemical characteristics of the soil itself by using a solidifying material or the like. It came to the thought that it was suitable to make it mainly reduce. In other words, the inventor can reduce the moisture and oil content in the soil to modify the physical properties of the soil, and then modify the chemical properties using a solidifying material or the like as necessary. The inventors have arrived at the invention as appropriate. In this way, by first modifying the physical properties by reducing the moisture and oil content, the amount of chemical substances used to complete the final reforming is greatly reduced, reducing costs and reducing environmental impact. Will come to be.

  The soil reforming apparatus 1 according to Embodiment 1 efficiently uses combustion heat and exhaust heat to reduce moisture and oil contained in the soil to be reformed. Soil with reduced moisture and oil content can have sufficient hardness and strength when used in various applications such as factories, cultivated land, and residential land. That is, the soil 10 is modified to be usable. In addition, the soil reforming is completed by additionally applying a solidifying material such as lime or bentonite as necessary. Of course, as described above, the amount of the solidifying material used in this case can be small.

(Overview of operation)
The operation | movement outline | summary of the soil reforming apparatus 1 in Embodiment 1 is demonstrated.

  The soil reformer 1 is transported and installed in a place that requires soil modification. For example, it is installed on land that contains a large amount of seawater and impurities due to floods and disasters. Since the soil reforming apparatus 1 is transported and installed on the land where the soil needs to be reformed, it is not necessary to transport the soil a plurality of times, and soil reforming with low environmental load and cost can be realized.

  Since the soil reforming measure 1 has the combustion chamber 100 having a box shape, the combustion chamber 100 is installed on the ground. Of course, when installed, it may be installed on a scaffold or a framework (or in combination with a scaffold or a framework). A combustion device 5 is installed in the combustion chamber 100. Since the combustion device 5 needs to release combustion heat into the combustion chamber 100, the tip of the combustion device 5 is inserted into the combustion chamber 100. For this reason, the rear of the combustion apparatus 5 is exposed outside the combustion chamber 100.

  An outside of the combustion chamber 100 is provided with an input device 7 for introducing the soil to be reformed, and this input device 7 is attached to the combustion chamber 100. The combustion chamber 100 is provided with a discharger 8 for discharging the soil after the reforming process.

  The combustion chamber 100 is suitably made of metal. Since the inside generates high heat, it is appropriate that it is made of metal from the viewpoint of safety in addition to durability and strength.

  As described above, the soil reforming apparatus 1 is assembled and installed.

(Input of soil to be modified)
The input device 7 inputs the soil to be modified into the first transport pipeline 2. For example, the soil of the land is dug up by a heavy machine and put into the thrower 7. Or the soil conveyed with the belt conveyor is thrown into the feeder 7. Since the thrower 7 is connected to the first transport pipeline 2, the thrower 7 throws the soil to be reformed into the first transport pipeline 2 as it is.

  At this time, the charging speed of the charging device 7 into the first transport pipe line 2 may be adjusted to the transport speed of the first transport pipe line 2. Of course, the speed at which the soil is carried into the feeder 7 by a heavy machine or a belt conveyor may be adjusted to the transport speed of the first transport pipeline 2. The soil loading speed from the charging device 7 and the charging speed from the charging device 7 to the first conveying line 2 are adjusted to the conveying speed of the first conveying line 2 in this way, so that the soil is removed from the charging apparatus 7. This is because it will not overflow or run out.

(Transportation and drying in the first transport pipeline)
The 1st conveyance pipeline 2 conveys the soil thrown in from the thrower 7. As shown in FIG. Here, the 1st conveyance pipe line 2 is a pipe line which is cylindrical and has internal space, and internal space conveys soil. Here, the internal space has a space in which the screw 21 can be accommodated. The screw 21 has continuous spiral blades, and the spiral blades carry the soil in the right direction (in FIG. 1). The 1st conveyance pipeline 2 can determine the conveyance speed of soil by the rotation speed of the screw 21, the angle of a blade | wing, and the number of blades. The 1st conveyance pipeline 2 is provided with this screw 21 in interior space. The screw 21 extends along the extending direction of the first transport pipeline 2.

  The soil thrown into the first transport pipeline 2 contains a large amount of impurities such as moisture and oil. That is, volume and viscosity are large. For this reason, it is also preferable that the surface of the first pipeline 2 and the surface of the screw 21 be subjected to a surface treatment that is resistant to viscosity.

  The heating device 5 releases combustion heat to the combustion chamber 100 by burning using biomass fuel. Since the 1st conveyance pipe line 2 is installed in the combustion chamber 100 inside, the outer side of the 1st conveyance pipe line 2 receives the combustion heat which fills this combustion chamber 100 inside. The soil transported inside the first pipeline 2 is dried by receiving heat from the combustion heat. For this reason, the drying of the soil gradually proceeds as the first transport pipeline 2 is transported.

  In addition, since the combustion device 5 is installed below the combustion chamber 100, the combustion heat released from the combustion device 5 diffuses from below to above the combustion chamber 100. For this reason, the upper temperature of the combustion chamber 100 is higher than the lower temperature. That is, higher heat is applied to the first transport pipeline 2. The soil moving through the first transport pipeline 2 is the soil to be modified and is the first stage, and thus contains a large amount of moisture and oil as described above. For this reason, since the high heat is required for drying of this soil, the 1st conveyance pipe line 2 can receive a higher heat by being installed above the combustion chamber 100. FIG.

  As the soil containing a large amount of moisture and oil is heated in the first transport pipeline 2, gas is generated from the soil. The gas includes exhaust gas obtained by evaporating water vapor or oil. The first transport pipeline 2 is connected to the gas delivery path 4. In particular, the gas delivery path 4 is connected in the second half of the transportation of the first transportation pipeline 2. The gas generated from the soil heated in the first transport pipe 2 enters the gas delivery path 4.

  The gas discharge path 4 is a pipe line having a predetermined route, and carries the received gas along this route. The gas discharge path 4 is connected to the combustion space 6. The combustion space 6 is a part of the combustion chamber 100 and is a space connected to the combustion part of the combustion device 5. The gas discharge path 4 discharges the transported gas to the combustion space 6.

(Acceleration of combustion in combustion equipment)
The combustion device 5 burns using biomass fuel as fuel. The biomass fuel includes at least one of wood chips, bamboo chips, bioethanol fuel and biodiesel fuel. These biomass fuels are supplied to the combustion device 5, and the combustion device 5 generates combustion heat.

  Since the combustion device 5 burns using biomass fuel as fuel in this way, the environmental load can be reduced by itself. However, even if the biomass fuel is a fuel with a low environmental load, the environmental load cannot be made zero at the biomass fuel production stage.

  Here, the combustion device 5 performs combustion in the combustion space 6. The gas discharge path 4 supplies gas generated from soil to the combustion space 6. As described above, this gas contains water vapor and exhaust gas. Exhaust gas generated by evaporation of oil in the soil often contains combustion components. Moreover, even if it is water vapor | steam, if it will be heated with the combustion heat from the combustion apparatus 5 inside the combustion space 6, it will become heating water vapor | steam. The heated steam accelerates the heating of the heating device 5 like the exhaust gas.

  Thus, the combustion device 5 can perform combustion not only using the supplied biomass fuel but also using the gas supplied from the gas discharge path 4. By using this gas, the combustion efficiency of the combustion device 5 can be improved and the accuracy of soil reforming can be increased. Of course, a small amount of biomass fuel is required to produce the same degree of combustion. As a result, the environmental load can be further reduced.

  The combustion device 5 has, for example, a cylindrical outer shape, and this cylindrical shape has a structure that easily releases combustion heat toward the tip. For example, the tip only needs to face the combustion space 6. With this structure, the combustion device 5 easily releases combustion heat to the tip. Moreover, it is also suitable for the combustion apparatus 5 to be equipped with the ventilation fan so that combustion heat may be discharge | released easily.

  Moreover, the gas discharge path 4 discharges the gas generated in the first transport pipe 2 to the combustion space 6 and supplies it to the combustion device 5, so that the soil is easily dried. Although the 1st conveyance pipe line 2 gives combustion heat to the soil to convey and dries the soil, when the generated gas remains in the 1st conveyance pipe line 2 as it is, it becomes difficult to dry the soil. In this respect, the gas discharge path 4 discharges the gas generated by heating the soil, so that there is a merit that the drying of the soil easily proceeds. Of course, the exhausted gas becomes a combustion fuel in the combustion device 5 as described above, and also has the merit of improving the combustion efficiency.

  As mentioned above, the conveyance by the 1st conveyance pipeline 2 can implement | achieve drying (primary drying) and gas discharge | emission of soil.

(Second transport pipeline)
The soil transported while being dried by receiving heat in the first transport pipeline 2 reaches the end of the first transport pipeline 2 (right side in FIG. 1). The terminal end of the first transport pipeline 2 includes a connection pipeline 11. The connection pipeline 1 has an internal space and connects the internal spaces of the first conveyance pipeline 2 and the second conveyance pipeline 3. That is, the connection pipe line 11 enables the movement of the soil between the first carrying pipe line 2 and the second carrying pipe line 3.

  The soil that has reached the connection pipeline 11 after being heated in the first conveyance pipeline 2 falls down the connection pipeline 11 and reaches the second conveyance pipeline 3. As shown in FIG. 1, since the connecting pipeline 11 is installed in the vertical direction, the soil that has moved along the first conveying pipeline 2 falls in the connecting pipeline 11 and the second conveying pipeline 3. To reach.

  Similar to the first transport pipeline 2, the second transport pipeline 3 has an internal space that can accommodate the screw 31. The screw 31 has the same spiral blade as that of the screw 21 and, by rotating, conveys the soil placed on the blade in a predetermined direction. In FIG. 1, the 2nd conveyance pipeline 3 conveys soil from the right to the left. That is, the second transport pipeline 3 transports the soil in the opposite direction to the first transport pipeline 2. The second transport pipeline 3 transports soil in the direction opposite to that of the first transport pipeline 2, whereby the combustion chamber 100 that accommodates the first transport pipeline 2 and the second transport pipeline 3 can be reduced in size.

  The second transport pipe 3 also receives the combustion heat generated by the combustion device 5 in the same manner as the first transport pipe 2. By being heated by this combustion heat, the soil transported inside the second transport pipeline 3 is dried. In particular, the soil transported through the second transport pipeline 3 dries the soil after drying (primary drying) in the first transport pipeline 2 (secondary drying). In the secondary drying, the soil with reduced moisture and oil content is further dried, so that the soil is further dried.

  In addition, the soil that has undergone primary drying in the first transport pipeline 2 has reduced moisture and oil content, and has a smaller volume. For this reason, the soil conveyed by the 2nd conveyance pipeline 3 will have a large surface area with respect to a unit volume, and the heating by combustion heat will become efficient. For this reason, drying is more likely to proceed. Of course, since there is a constant heat in the primary drying, heat is added in the secondary drying, and the drying proceeds easily.

  As described above, the secondary drying in the second transport pipeline 3 further promotes the drying of the soil.

  As the drying proceeds further in the secondary drying, the soil modification is completed. The second transport pipeline 3 transports the dried soil toward the end. In FIG. 1, the termination is on the left side.

  In addition, the screw 21 and 31 provided in each of the 1st conveyance pipeline 2 and the 2nd conveyance pipeline 3 has the function to not only convey soil but to stir soil. Each of the 1st conveyance pipeline 2 and the 2nd conveyance pipeline 3 exhibits the function to dry soil by combustion heat. For this reason, the screw 21 and 31 produce the merit which becomes easy to be dried by stirring soil.

(Discharge of modified soil)
A discharger 8 is provided at the end of the second transport pipeline 3, and the discharger 8 discharges the soil that has been dried (reformed) to the outside. Here, the discharger 8 may discharge the soil after the modification directly to the ground where the soil reformer 1 is installed. Since the purpose is to modify the soil of the land for which soil improvement is required, the modified soil is completed by discharging the soil after the modification to the land.

  Alternatively, it may be discharged once to a heavy machine or a transporter. This is because the soil after the modification is suitable for spraying the land or other land according to a predetermined procedure. FIG. 1 shows the modified soil 20 discharged from the discharger 8.

  As shown in FIG. 1, the ejector 8 may include a screw to ensure the ejection operation.

  Thus, the soil reformer 1 is provided with the 1st conveyance pipeline 2 and the 2nd conveyance pipeline 3 which have a mutually opposite conveyance direction, and makes a start point and an end point the same side, Can be modified. By setting it as such a reciprocation, the magnitude | size of the soil reforming apparatus 1 whole can be made small. Of course, the combination of the primary drying by the first conveyance pipeline 2 and the secondary drying by the second conveyance pipeline 3 enables efficient soil modification. Naturally, sufficient drying is performed by performing the secondary drying which can implement | achieve final drying after the primary drying in which main oil and water | moisture content are dried. By sufficient drying, the soil contaminated with impurities such as moisture and oil is modified and can be used.

(Excess gas discharge)
Further, although the gas generated in the first transport pipe 2 is supplied to the combustion space 6, excess exhaust gas may be discharged to the outside through the discharge pipe 9. The discharge line 9 is connected to the first transport line 2 and discharges excess exhaust gas to the outside.

(After discharge)
The soil that has been modified by the soil reformer 1 is used as it is for the land that requires the soil after the modification, and where the soil reformer 1 is installed. Since the soil reformer 1 is often installed on land that needs to be reformed, the modified soil is sprayed and used as it is. Of course, it may be used after a certain chemical modification is added.

  Alternatively, the modified soil may be transported to another place and used after additional treatment such as chemical modification is performed.

  In any case, since the physical reforming by the soil reforming apparatus 1 has been completed, the amount of chemical substances added to perform the chemical reforming can be reduced. If the amount of chemical substances added is small, the cost can be reduced and the environmental load can be reduced. For the addition of the chemical substance, for example, a modifying material such as lime or bentonite may be used.

  As described above, the soil reforming apparatus 1 according to the first embodiment can realize soil reforming in a place where soil reforming is required while increasing the combustion efficiency and reducing the environmental load and cost.

  (Embodiment 2)

  Next, a second embodiment will be described.

  In the second embodiment, a case where a special device is used as the combustion device 5 will be described. FIG. 3 is a side view of the combustion apparatus according to Embodiment 2 of the present invention. FIG. 3 shows the internal structure of a combustion apparatus 30 as an example of the combustion apparatus 5.

  The combustion device 30 is open at the front and closed at the rear. The amount of heat burned at the front opening is dissipated, and biomass fuel and air are taken in at the rear closing.

  The main body cylinder 29 includes an outer cylinder 32 and an inner cylinder 33 that can be rotated coaxially, and has a double structure in which the outer cylinder 32 covers the periphery of the inner cylinder 33 with a certain gap. Since the main body cylinder 29 is rotatable, the inner cylinder 33 is rotated. By this rotation, the internal space of the inner cylinder 33 can also be rotated. By rotating, the biomass fuel stored in the inner space of the inner cylinder 33 can rotate while burning, so that air and flame can be uniformly contacted with the biomass fuel, and primary combustion in the inner cylinder 33 is promoted.

  A combustion cylinder 35, which is the same cylinder, is connected to the opening of the main body cylinder 29. Since the combustion cylinder 35 is connected in a state of being connected to the outer cylinder 32, one end of the gap generated between the inner cylinder 33 and the outer cylinder 32 is connected to the internal space of the combustion cylinder 35 as it is. The combustion cylinder 35 captures the physical increase of the combustant after the primary combustion due to the mass decrease and the temperature increase, and burns the biomass fuel at a higher temperature.

  Here, the main body cylinder 29 and the combustion cylinder 35 have an upward inclination with respect to the horizontal plane. Here, upward refers to a state in which the opening of the combustion cylinder 35 faces upward.

  By having such an inclination, the biomass fuel combusted at a predetermined temperature in the inner space of the inner cylinder 33 is reduced in mass, so that it is easy to move upward. Since the combustion cylinder 35 is located above, the combustion cylinder 35 burns the biomass fuel that has moved. That is, secondary combustion is performed.

  Here, a gap between the outer cylinder 32 and the inner cylinder 33 becomes a ventilation path 37. The ventilation path 37 supplies the air taken in from the air supply port 45 to the internal space of the inner cylinder 33 and the internal space of the combustion cylinder 35. Here, the supply port 45 is connected to the outside world, takes air from the outside world, and sends the air to the ventilation path 37 via the ventilation port 38. The ventilation path 37 moves the supplied air, supplies a part thereof to the internal space of the inner cylinder 33, and supplies the rest to the internal space of the combustion cylinder 35.

  The inner cylinder 33 includes a blowout port 40 on the outer periphery thereof. Since the blowing port 40 communicates with the ventilation path 37, the air passing through the ventilation path 37 leaks from the blowing port 40 and is sent into the internal space of the inner cylinder 33. That is, the ventilation path 37 supplies air to the internal space of the inner cylinder 33 through the outlet 40.

  On the other hand, the tip of the ventilation path 37 is directly connected to the combustion cylinder 35. For this reason, the ventilation path 37 supplies air to the internal space of the combustion cylinder 35 from the tip. The ventilation path 37 supplies 30% to 50% of the total amount of air that can be taken from the outside (that is, can be supplied to the combustion device 6) to the internal space of the inner cylinder 33. On the other hand, the ventilation path 37 supplies 50 to 70% of the total air amount to the internal space of the combustion cylinder 35. That is, the amount of air supplied to the combustion cylinder 35 is larger than the amount of air supplied to the inner cylinder 33. As a result, the amount of air supplied to the combustion cylinder 35 that performs secondary combustion that needs to be combusted at a higher temperature increases, and secondary combustion is optimally performed.

  The ratio of the supply amount to the inner cylinder 33 and the supply amount to the combustion cylinder 35 by the ventilation path 37 can be adjusted as appropriate by adjusting the position, number, opening area, shape, angle, and the like of the outlet 40. . For example, in the comparison of the total opening area of the outlet 40 and the total opening area where the ventilation path 37 and the combustion cylinder 35 are connected, if the latter is made larger than the former, the amount of air supplied to the internal space of the inner cylinder 33 Rather, the amount of air supplied to the internal space of the combustion cylinder 35 can be adjusted to be larger.

  The combustion device 30 is supplied with 30 to 50% of the total amount of air and is supplied with 50% to 70% of the total amount of air following the primary combustion in the inner cylinder 33 physically located below and the primary combustion. In addition, the biomass fuel is reliably burned by the continuity with the secondary combustion of the combustion cylinder 35 physically located above the inner cylinder 33. With this reliable combustion, the organic waste is completely ashed and converted into inorganic waste. Of course, high combustion heat can be generated and the combustion heat can be released to the outside through the opening at the tip of the combustion cylinder 35. In addition, combustion ash that has become inorganic waste can also be released.

  By using the combustion device 30 described in the second embodiment as the combustion device 5 required by the soil reformer 1, efficient combustion is possible.

  As mentioned above, the soil improvement apparatus demonstrated by Embodiment 1-2 is an example explaining the meaning of this invention, and includes the deformation | transformation and remodeling in the range which does not deviate from the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Soil reformer 2 1st conveyance pipe 21 Screw 3 2nd conveyance pipe 31 Screw 4 Gas delivery path 5 Combustion apparatus 6 Combustion space 7 Input device 8 Ejector 100 Combustion chamber 29 Main body cylinder 32 Outer cylinder 33 Inner cylinder 34 Pipe line 35 Combustion cylinder 37 Ventilation path 38 Ventilation port 39 Frame member 40 Blowout port 41 Support body 42 Bearing 45 Supply port

Claims (10)

A combustion chamber that receives the heat of combustion and raises the temperature;
A first transport pipe that is installed in the combustion chamber and transports the introduced soil to be modified;
A second transport line installed in the combustion chamber for transporting the soil that has passed through the first transport path;
A combustion device for burning biomass fuel and sending combustion heat into the combustion chamber;
A gas delivery path for delivering gas generated in the first transport path to the combustion device,
Each of the said 1st conveyance pipeline and the said 2nd conveyance pipeline is a soil reformer which has the screw which can rotate the said soil. Each of the first transport pipeline and the second transport pipeline has an internal space in which the screw can be accommodated,
The soil reforming apparatus according to claim 1, wherein the combustion chamber heats internal spaces of the first and second transport pipelines by the combustion heat.   3. The soil reforming apparatus according to claim 1, wherein the first transport pipe sends gas generated from the soil transported by the combustion heat to the gas delivery path.   The soil reformer according to any one of claims 1 to 3, wherein the screw extends along an extending direction of the first transport pipeline and the second transport pipeline.   The soil reformer according to any one of claims 1 to 4, wherein the gas delivery path delivers exhaust gas, water vapor, and combustion gas generated in the first transport pipeline.   The soil reformer according to any one of claims 1 to 5, wherein the combustion device generates combustion heat using a gas from the exhaust gas delivery path in addition to biomass fuel.   The soil reformer according to any one of claims 1 to 6, further comprising a feeder for throwing the soil to be reformed into the first transport pipeline.   The soil reformer according to any one of claims 1 to 7, further comprising a discharger that discharges the soil transported through the second transport pipeline.   The soil reformer according to any one of claims 1 to 8, wherein the biomass fuel includes at least one of a wood chip, a bamboo chip, a bioethanol fuel, and a biodiesel fuel. The combustion device comprises:
A main body cylinder having a double structure of an outer cylinder and an inner cylinder that are coaxially rotatable;
A combustion cylinder that is connected to the tip of the cylinder and burns the combustion agent;
A ventilation path for supplying air to the inner space of the inner cylinder and the combustion cylinder using a gap between the outer cylinder and the inner cylinder;
The main body cylinder and the combustion cylinder have an upward inclination with respect to a horizontal plane,
The ventilation path supplies 30% to 50% of the total amount of air that can be supplied to the inner space of the inner cylinder, and 50% to 70% of the total amount of air that can be supplied to the inner space of the combustion cylinder. The soil reformer according to claim 1 to supply.