JP4625414B2 - Carbide storage method and carbide transport storage container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for storing carbide of exothermic granular material generated after processing wastes and the like, and a storage container for transporting carbide used for storing and transporting.

Conventionally, when processing waste such as garbage, in order to extend the life of the final disposal site (landfill), the amount of waste has been reduced by incineration or gasification and melting methods. On the other hand, recently, in response to a request for reduction of global warming gas (CO ₂ ), waste such as waste is not incinerated, but is carbonized in a carbonization furnace and recovered as particulate carbides for effective use. A possible method has been proposed. This carbide can be used, for example, as an alternative material such as coal or coke as a fuel, or as a heat insulating material on the surface of a molten metal in a metal electric furnace, and thus is further effective for resource saving.

  Carbide recovered from the carbonization furnace is packed in a storage container for transportation, but this carbide contains many reactive groups such as free radicals and functional groups, and generates heat due to low-temperature oxidation reaction, etc. have. This carbide is easier to handle when stored in a storage container as large as possible, but as the amount of storage increases, the surface area does not increase with respect to the increasing volume, so it is difficult to dissipate heat, the inside heats up and the temperature rises An exothermic reaction such as low-temperature oxidation is promoted, and if it exceeds a certain temperature (for example, 80 ° C.), thermal runaway occurs, and in the worst case, it may ignite and lead to a fire.

  In order to solve the above problem, a carbide generating facility as shown in Patent Document 1 has been proposed. This carbide generation facility is a facility that supplies at least one of a deoxygenating agent and a deoxygenated aqueous solution to the carbide, performs degassing, and performs bagging in a state where the oxygen concentration in the bag is reduced. However, in order to prevent heat generation of the granular material by this method, there is a problem that large-scale equipment is required, and that a deoxygenating agent and a deoxygenated aqueous solution are necessary, resulting in high running costs.

  In addition, a method of storing in smaller storage containers can be considered so that the amount of carbide stored can be reduced and heat dissipation can be facilitated, but the cost increases because it is necessary to prepare a large number of storage containers. In addition, there is a problem that it is inconvenient to handle because it is stored in small portions.

Japanese Patent Laid-Open No. 2004-256122

The present invention solves the problems as described above, and a method capable of safely storing and storing so that the carbonized carbide of the exothermic powder does not cause a fire, and can be safely stored and stored. It was completed for the purpose of providing a granular storage container that can be handled and is excellent in handling.

The invention according to claim 1, which has been made in order to solve the above-mentioned problems, is a low temperature oxidation reaction comprising a reactive group containing a free radical and a functional group, which is produced after carbonizing a waste in a carbonization furnace. When storing and storing powdered carbide having exothermic properties in a bag-like container,
A partition wall having an endothermic function by heat conduction and heat capacity, and stored in a carbide transport storage container divided into a plurality of carbide storage rooms,
The heat generated by the low-temperature oxidation reaction of the carbide during storage is transferred to the partition wall to absorb the heat, thereby suppressing the promotion of the exothermic reaction accompanying the temperature rise of the carbide and reaching the temperature at which the carbide runs away. It is characterized by storing while preventing.
The invention according to claim 2 is the invention according to claim 1,
Carbide is stored in a state where the partition wall is exposed from the carbide, and heat absorbed from the exposed partition wall is radiated.

Invention of Claim 3 is the storage container for the carbide conveyance used for the carbide storage method of Claim 1 or Claim 2,
The partition wall is covered with a heat transfer layer.
Invention of Claim 4 is the storage container for carbide conveyance used for the carbide storage method of Claim 1,
The partition is provided with fins for heat dissipation .
Invention of Claim 5 is the storage container for the carbide conveyance used for the carbide storage method of Claim 1 or Claim 2,
The partition wall is hollow with an open upper end, and heat generated from the carbide is radiated by the partition wall.
The invention according to claim 6 is a carbide transport storage container used in the carbide storage method according to claim 1,
The partition wall is filled with a cooling medium, and heat generated by the carbide stored in the granular material storage room is absorbed by the cooling medium.
The invention according to claim 7 is a carbide transport storage container used in the carbide storage method according to claim 1,
The partition wall is hollow;
A pump for feeding the cooling medium;
A cooling medium is fed into the partition by the pump, and the cooling medium is circulated in the partition.

In the present invention , powdered carbides produced after carbonization of waste in a carbonization furnace and containing exothermic groups including free radicals and functional groups and having exothermic properties by low-temperature oxidation reaction are converted into bag-like containers. When storing and storing in the storage container, it is a partition wall having an endothermic function by heat conduction and heat capacity, stored in a carbide transport storage container divided into a plurality of carbide storage rooms, and generated by a low temperature oxidation reaction of the carbide during storage Since the heat is transferred to the partition wall to absorb heat, the acceleration of the exothermic reaction accompanying the temperature rise of the carbide is suppressed, and the carbide is stored while preventing the carbide from reaching the temperature at which the thermal runaway occurs. Regardless of the equipment, running costs are low, and heat storage of powdered carbides is convenient for handling, preventing ignition and fire, and safe storage and storage of powdered carbides. Rukoto is possible.

  If the partition wall has a hollow structure, the partition wall is filled with a cooling medium, or the cooling medium circulates inside the partition wall, the powdered carbides can be stored and stored more safely. It becomes possible.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
The front view of the storage container of the granular material of this invention is shown in FIG. In FIG. 1, 1 is a bag-like container main body called a flexible container having a substantially rectangular parallelepiped shape with a side of about 1 m, for example, and an upper portion is an opening. The container body 1 may be a substantially rectangular parallelepiped metal or resin container having a side of about 1 m. Reference numeral 2 denotes a transportation suspension belt attached to the upper part of the container body 1. In the present invention, as shown in FIG. 2, the container body 1 is divided into a plurality of carbide storage rooms 4 by vertical partition walls 3. In this embodiment, the number of sections is divided into four, but the number of sections may be two to three or four or more. The heat capacity of the partition wall 3 is preferably large. Moreover, it is preferable that the heat transfer layer 5 with high heat conductivity is coat | covered on the both sides or one side of this partition 3, and it is preferable that the material of this heat transfer layer 5 is a metal and a silicon | silicone, for example.

  The granular material storage container of the present invention is used for storing and transporting carbide of granular material having exothermic properties in the carbide storage room 4 and storing and transporting the granular material by contact with oxygen in the air. An exothermic reaction such as low-temperature oxidation of body carbide may proceed and the temperature may rise. However, since the inside is divided by the partition walls 3, heat generated by an exothermic reaction such as low-temperature oxidation of granular carbide moves from the heat transfer layer 5 to the partition walls 3, and the partition walls 3 absorb the heat, Since the powder is cooled, it is possible to prevent the temperature of the carbide of the powder from rising. Further, when the partition 3 or the heat transfer layer 5 is exposed from the carbide of the granular material and the carbide is stored in the container body 1, from the portion exposed from the carbide of the granular material of the heat transfer layer 5 or the partition 3. Heat is dissipated and the carbides of the granular material are cooled. In addition, in order to improve heat dissipation, the fin 3 (not shown) for heat dissipation may be provided in the partition 3 or the heat transfer layer 5. When the partition 3 or the heat transfer layer 5 is exposed from the carbide of the granular material and the carbide is stored in the container body 1 or when the heat dissipation fin is provided, the heat capacity of the partition 3 is large. There is no problem even if it is not.

  As another embodiment, as shown in FIG. 3 or FIG. 4, the container body 1 may be divided into a plurality of carbide storage chambers 7 by vertical partition walls 6. The hollow partition 6 preferably has high heat conductivity. Reference numeral 8 denotes a hollow portion of the hollow partition wall 6.

  When the particulate carbide is stored in the carbide storage chamber 7, heat generated by an exothermic reaction such as low-temperature oxidation of the granular carbide is transferred from the hollow partition wall 6 to the hollow portion 8. In the case where the upper end of the hollow partition wall 6 is open to the atmosphere, heat is released to the outside of the granular material storage container by replacing the air in the hollow portion 8, and the temperature of the carbide of the granular material is increased more efficiently. Can be prevented.

  When the hollow portion 8 is filled with a cooling medium, the cooling function of the hollow partition 6 is further improved. For example, water is used as the cooling medium. In this case, if the specific heat of the carbide is 0.3 kcal / kg ° C., the specific heat of water is 1 kcal / kg ° C., and the specific heat of water is three times the specific heat of the carbide. Then, the heat generated by the carbide of the granular material is absorbed, and the cooling function of the hollow partition wall 6 is improved. The cooling medium is not limited to water and may be ethylene glycol, propylene glycol, or the like. Moreover, it is good also as charging ice powder, dry ice, etc. in the hollow part 8, and cooling the carbide | carbonized_material of a granular material positively.

  In addition, as shown in FIG. 5, when the cooling medium is circulated through the hollow partition wall 8, the cooling function is further improved. In FIG. 5, the inlet side jack 9 and the outlet side jack 10 are connected to the hollow portion 8. The inlet side jack 9 and the outlet side jack 10 are connected to a pump 12 and a cooling medium container 13 by a pipe 11, respectively.

  When the pump 12 is driven, the cooling medium is supplied from the cooling medium container 13 to the inlet-side jack 9, and the cooling medium flows through the hollow portion 8 while taking the heat of the hollow partition wall 6. The cooling medium after flowing through the hollow portion 8 circulates from the outlet side jack 10 to the cooling medium container 13. As a result, the granular material is cooled from the portion in contact with the hollow partition wall 6, and does not store heat, and the temperature rise is suppressed. The cooling medium may be directly discharged from the outlet jack 10 to the outside of the container body 1 without circulating the cooling medium from the outlet jack 10 to the cooling medium container 13.

  The cooling medium is not limited to a liquid such as water and may be a gas such as air. When air is used as a cooling medium, the cooling medium container 13 is not necessary.

  As described above, according to the present invention, without using a large-scale apparatus, it is possible to reliably prevent heat accumulation of powdered carbides and prevent ignition and fire due to thermal runaway.

Although the present invention has been described above in connection with the most practical and preferred embodiments at the present time, the present invention is not limited to the embodiments disclosed herein. The carbide storage method and the carbide transport storage container with such changes are also included in the technical scope without departing from the spirit or concept of the invention that can be read from the claims and the entire specification. Must be understood.

It is a front view which shows embodiment of this invention. It is sectional drawing which shows embodiment of this invention. It is a front view which shows embodiment of this invention. It is sectional drawing which shows embodiment of this invention. It is a schematic diagram which shows the use condition of the storage container for carbide conveyance of this invention.

DESCRIPTION OF SYMBOLS 1 Container body 2 Suspension belt 3 Bulkhead 4 Carbide storage room 5 Heat transfer layer 6 Hollow partition wall 7 Carbide storage room 8 Hollow part 9 Inlet side jack 10 Outlet side jack 11 Piping 12 Pump 13 Cooling medium container

Claims (7)

  Powdered carbides that are generated after carbonization of waste in a carbonization furnace and that contain highly reactive groups including free radicals and functional groups and are exothermic due to low-temperature oxidation reactions are stored in a bag-like container. In storing,
  A partition wall having an endothermic function by heat conduction and heat capacity, and stored in a carbide transport storage container divided into a plurality of carbide storage rooms,
  The heat generated by the low-temperature oxidation reaction of the carbide during storage is transferred to the partition wall to absorb the heat, thereby suppressing the promotion of the exothermic reaction accompanying the temperature rise of the carbide and reaching the temperature at which the carbide runs away. The carbide storage method characterized by storing, preventing.   The carbide storage method according to claim 1, wherein the carbide is stored in a state where the partition wall is exposed from the carbide, and the heat absorbed from the exposed partition wall is dissipated. A carbide transport storage container used in the carbide storage method according to claim 1 or 2,
The partition wall is coated with a heat transfer layer . A carbide transport storage container used in the carbide storage method according to claim 1,
A carbide transport storage container, wherein the partition wall is provided with heat radiation fins . A carbide transport storage container used in the carbide storage method according to claim 1 or 2,
The partition wall is hollow with an open upper end, and the carbide transport storage container is characterized in that heat generated from the carbide is radiated by the partition wall . A carbide transport storage container used in the carbide storage method according to claim 1,
A carbide transport storage container , wherein the partition wall is filled with a cooling medium and heat generated by the carbide stored in the granular material storage room is absorbed by the cooling medium . A carbide transport storage container used in the carbide storage method according to claim 1,
The partition wall is hollow;
A pump for feeding the cooling medium;
A storage container for transporting carbide, wherein the cooling medium is fed into the partition by the pump, and the cooling medium flows through the partition.

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