JP4357615B2 - Fumigant residue transport container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container for transporting a fumigant residue remaining after fumigation treatment performed for the purpose of controlling grains and other pests, and more specifically, an undecomposed component of metal phosphide after fumigation treatment. The present invention relates to a container for safely transporting a fumigant residue to a treatment plant, and a combination of a residue case and a container stored in the container.
[0002]
[Prior art]
In recent years, a fumigant containing hydrogen phosphide has been used for fumigation treatment to eliminate pests adhering to grains such as rice and wheat, leaf tobacco, citrus fruits and vegetables. The fumigant is an aluminum phosphide agent or a magnesium phosphide agent, and when they are left in the air, they absorb moisture in the air and cause a decomposition reaction as represented by the following reaction formula. Hydrogen phosphide gas is generated.
AlP + 3H ₂ O → Al (OH) + PH ₃
Mg ₃ P ₂ + 6H ₂ O → 3Mg (OH) ₂ + 2PH ₃
This decomposition reaction is greatly influenced by atmospheric temperature and humidity, and the decomposition time is 2 to 3 days in summer and 7 days or more in winter. Therefore, even after the designated fumigation time has elapsed, the fumigant usually does not completely decompose, and a fumigant residue containing undecomposed metal phosphide remains after fumigation. The fumigant residue is usually transported to a specific treatment plant and processed.
[0003]
Hydrogen phosphide is a dangerous substance designated as a specific poison by the Poisonous and Deleterious Substances Control Law, and when it reaches a concentration of 1.8%, it reacts violently and causes an explosion. In Japanese Patent Laid-Open No. 9-24115, in order to make the metal phosphide residue harmless safely, water is gradually added to the metal phosphide to generate hydrogen phosphide, and the hydrogen phosphide is burned at 650 ° C. or higher to obtain pentoxide. Disclosed is a method of generating 2 phosphorus, converting 2 phosphorus pentoxide to phosphoric acid by adding sufficient water to the generated 2 phosphorus pentoxide and reacting. Such fumigant residue processing is usually performed in a specific processing plant provided away from the fumigation site such as a warehouse.
[0004]
However, there is no known method for safely transporting metal phosphide residues, which are fumigant residues, to a processing plant. Conventionally, the residue is put in a can, covered with a breathable material and transported on a truck bed so as not to increase the concentration of hydrogen phosphide generated during transportation. The transport method is not sufficiently safe. Conventionally, the collected residues are accumulated without being treated, causing an explosion and explosion, the residue buried in the soil is ignited and exploding, and an accident such as an explosion occurs during the hydrolysis of the residue. ing.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to solve the above-mentioned conventional problems and to provide a transport container capable of safely and easily transporting a metal phosphide residue remaining after fumigation processing to a treatment plant or the like. Another object of the present invention is to provide a transport container that eliminates the danger of poisoning and explosion by absorbing and removing hydrogen phosphide gas generated from metal phosphide residues with an absorbent. Another object of the present invention is to prevent the concentration of hydrogen phosphide gas generated by a simple structure from increasing in a metal phosphide residue transport container and to suppress the temperature rise in the transport container. Still another object of the present invention is to provide a structure that makes it possible to easily replace the hydrogen phosphide gas absorbent provided in the transport container. Still another object of the present invention is to prevent the concentration of hydrogen phosphide gas from increasing even in a stationary state in a metal phosphide residue transport container. Other objects of the present invention will be clarified in the following description.
[0006]
[Means for Solving the Problems]
The container for transporting the fumigant residue of the present invention has a main body case, an upper lid and a vent cover, and the main body case has a storage chamber capable of storing a residue case containing the fumigant residue, hydrogen phosphide. It has an absorbent layer capable of absorbing gas, an upper opening, and a vent, the upper opening has a shape that allows the residue case to be taken in and out of the storage chamber, and the upper lid can open and close the upper opening of the main body case The vent cover can open and close the vent of the main body case, and the housing chamber of the main body case can communicate with the outside of the main body case via the absorbent layer and the vent.
[0007]
The container of the present invention preferably has the following configuration. (A) The absorbent layer is composed of granular activated carbon housed in an absorbent case having two wire meshes arranged in parallel to each other, and absorbs hydrogen phosphide gas and converts it into a phosphorus compound having strong adsorption power. It has the ability to remove hydrogen phosphide gas in the air. (B) The absorbent case is detachably attached to the main body case and has an opening that is opened and closed by a cap. The absorbent case is filled with activated carbon through the opening or discharged from the absorbent case. It is possible. (C) The main body case has a rectangular horizontal cross section. (D) In the main body case, a vent is formed in each of the side walls forming one pair, and a handle is provided in each of the side walls forming the other pair. (E) The main body case has a caster attached to the bottom. (F) The upper lid is connected to the main body case by a plurality of releasable fasteners, and has a handle at the top. (G) The main body case includes a gas concentration measurement port communicated with the storage chamber and an air supply port capable of supplying air to the storage chamber.
[0008]
In the combination of the residue case for storing the fumigant residue of the present invention and the container for storing and transporting the residue, the container has a main body case, an upper lid and a vent cover, and the main body case accommodates the fumigant residue. A storage chamber that can store a residue case, an absorbent layer that can absorb hydrogen phosphide gas, an upper opening, and a vent, and the upper opening has a shape that allows the residue case to be taken into and out of the storage chamber. The upper opening of the main body case can be opened and closed, the vent cover can open and close the vent of the main body case, and the housing chamber of the main body case communicates with the outside of the main body case through the absorbent layer and the vent hole. Is possible. The residue case has a plate portion on which the residue of the fumigant can be spread and placed flat, and can be stably stacked up and down in the container storage chamber.
[0009]
The combination of the present invention preferably comprises the following configuration. (H) The residue case further includes a handle having a portion extending upward from the side edge of the plate. (I) The plate has a mesh portion on which the fumigant residue can be spread and placed flat. (J) When the residue cases are stacked one above the other, the upper residue case plate and the lower residue case plate are separated by a handle of the lower residue plate, and there is a gas flow gap between them. It will occur.
[0010]
[Action]
The case on which the metal phosphide residue remaining after fumigation is placed is stacked and stored in the storage chamber of the main body case of the transport container with the vent cover removed. Hydrogen phosphide gas generated from the residue is absorbed and removed by the absorbent layer provided in the main body case. The activated carbon constituting the absorbent layer absorbs hydrogen phosphide gas and converts it into a phosphorus compound having a strong adsorption power. The storage chamber communicates with the outside through the absorbent layer and the vent, and external air flows from the vent into the containment chamber through the absorbent layer and flows out from the other vent, for example, when a running wind hits the container. The air in the storage chamber flows out of the vent after passing through the absorbent layer, and flows out after the toxic and dangerous hydrogen hydride gas is removed. As the outside air flows through the storage chamber, the hydrogen phosphide gas concentration in the storage chamber does not increase, and the increase in gas temperature in the storage chamber is suppressed.
[0011]
In order to carry out the metal phosphide residue remaining after fumigation using the transport container, the residue is spread on the flat mesh part of the plate of multiple residue cases on average, and the case where the residue is placed is The upper and lower stacks are stored in the storage chamber of the main body case of the transport container with the vent cover removed. Each residue case handle extends upwardly from the side edge of the plate and separates the upper residue case plate from the lower residue case plate. The generated hydrogen phosphide gas flows through the upper and lower plates and comes into contact with the absorbent layer. The transport container is transported after the residue case is accommodated and the upper lid is closed. If the amount of air flowing from the vent into the storage chamber is not sufficient, air is supplied to the storage chamber by a pump through the air supply port, and the hydrogen phosphide concentration is maintained at a low value.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic vertical sectional view showing an embodiment of the residue carrying container 8 and the residue case 70 of the present invention, FIG. 2 is a perspective view showing the residue case 70 of the embodiment of the present invention, and FIG. It is a perspective view which shows the Example of a residue conveyance container and a residue case. As shown in FIGS. 1 and 3, the container 8 for carrying the fumigant residue 6 has a main body case 10, an upper lid 60, and a vent cover 50. The main body case 10 includes a storage chamber 12 that can store a residue case 70 for storing the fumigant residue 6, an absorbent layer 30 that can absorb hydrogen phosphide gas, an upper opening 14, and a vent 16. The upper opening 14 has a shape that allows the residue case 70 to be taken in and out of the storage chamber 12. The upper lid 60 can open and close the upper opening 14 of the main body case 10, and the vent cover 50 can open and close the vent 16 of the main body case 10. The housing case 12 of the main body case can communicate with the outside of the main body case 10 via the absorbent layer 30 and the vent 16.
[0013]
FIG. 1 shows a state where three residue cases 70 are accommodated in the container 8, the two vent holes 16 are opened, and the upper opening of the container is covered with the upper lid 60. FIG. 3 shows a state in which an empty residue case 70 is stored in the container 8 full of the container 8, the upper opening 14 is opened, and the vent cover 50 is attached to the vent 16 by the support groove 46. As shown in FIG. 1, the absorbent layer 30 is made of granular detoxified activated carbon 32 housed in an absorbent case 36 having two metal meshes 34, 34 arranged in parallel to each other. The activated carbon 32 has a property of adsorbing hydrogen phosphide gas (PH ₃ ) in the air, changing it to a phosphorus compound having a strong adsorptive power, and removing the hydrogen phosphide gas in the air. “CENTAUR” (trade name) developed by Calgon Carbon in Pittsburgh, Pennsylvania, USA is used. This detoxified activated carbon is a non-impregnated activated carbon mainly composed of bituminous coal, has the original adsorption function and catalytic action of activated carbon, has an apparent density of 0.5 to 0.6 g / mL, granular, ignition residue 4 to It has characteristics such as 8 wt%.
[0014]
The hydrogen phosphide gas (PH ₃ ) in the air absorbed by the detoxified activated carbon 32 is changed and rendered harmless as follows.
PH ₃ + 2O ₂ → H ₃ PO ₄ (orthophosphoric acid)
2PH ₃ + 3O ₂ → 2H ₃ PO ₃ (orthophosphorous acid)
xPH ₃ + 2xO ₂ → (HPO ₃ ) x + xH ₂ O (metaphosphoric acid)
x2PH ₃ + x3O ₃ → (HPO ₂ ) ₂ x + xH ₂ O (metaphosphorous acid)
These substances that have been rendered harmless and safe on activated carbon are water-soluble. Therefore, the activated carbon to which these substances are attached is regenerated by washing with water.
[0015]
The absorbent case 36 that accommodates the activated carbon 32 is detachably attached to the main body case 10. Further, the absorbent case 36 includes an opening 39 that is opened and closed by a cap 38, and the activated carbon 32 can be filled into the absorbent case 36 or discharged from the absorbent case 36 through the opening 39. Is possible. The distance between the two parallel meshes 34, 34 of the absorbent case 36 is about 40 mm, one absorbent case 36 is filled with about 6 kg of activated carbon, and one container contains 6 kg of absorbent. Two layers of activated carbon with a total of about 12 kg are used.
[0016]
The main body case 10 has a rectangular horizontal cross section, and a vent 16 is formed in each of the pair of side walls of the main body case 10, and a handle 28 (FIG. 3) is formed in each of the side walls 18 and 18 forming the other pair. Is provided. The main body case 10 has casters 42 and 42 on the bottom 22 to facilitate movement. The upper lid 60 includes a handle 68 and a fastening portion 65 that can be engaged with the fastener 25 on the side walls 18, 18. When the upper lid 60 is attached to the body case, the fastener 25 and the fastening portion 65 are engaged with each other. It is connected to the main body case 10. The main body case 10 further includes an air supply port 20 that also serves as a gas concentration measurement port communicating with the inside of the housing chamber 12. The dimensions of the main body case are, for example, a height of 55 cm, a width of 60 cm, and a depth of 50 cm, and are formed of a stainless steel plate.
[0017]
FIG. 1 shows a combined state of a residue case 70 for storing a fumigant residue and a container 8 for storing and transporting the residue, and FIG. The state which opened the opening | mouth 16 and covered the upper opening of the container with the upper cover 60 is shown. The container 8 is placed on the truck bed in the state shown in FIG. 1, and the traveling wind is transported in a state of passing through the container accommodation chamber 12 through the vent holes 16, 16. FIG. 3 shows a state in which an empty residue case 60 is stored in the container 8, the vent cover 50 is attached, and the upper lid 60 is removed.
[0018]
The residue case 70 that can be stored in the storage chamber 12 of the container 8 has a stainless steel plate portion 72 (FIG. 2) on which a fumigant residue can be spread and placed flatly. It is possible to stack. The residue case 70 further includes a handle 78 having a vertical portion 79 extending upward from the side edge 74 of the plate portion 72. The plate part 72 has a mesh part 76 (FIG. 2) on which a fumigant residue can be spread and placed flat. When a plurality of residue cases 70 are stacked one above the other, the upper residue case plate portion 72 and the lower residue case plate portion 72 are separated from each other by a lower residue plate handle 78. Gas gaps 81 and 81 (FIG. 1) are generated. The depth of the plate portion is about 5 cm, and about 5 kg of residue is accommodated in one residue case 70. The mesh part 76 is, for example, 32 meshes (32 per 25.4 mm).
[0019]
The operation of transporting the metal phosphide residue remaining after fumigation treatment from the fumigation station to the residue treatment facility using the container and the residue case of FIGS. 1 to 3 is performed as follows. First, the fumigant residue left at the fumigation site is accommodated in one or a plurality of residue cases 70. In this case, the fumigant residue is spread on the mesh portion 76 of the plate portion 72. The residue case 70 containing the fumigant residue 6 is sequentially stacked and stored in the storage chamber 12 of the main body case 10 (FIG. 1). In this case, the vent cover 50 is removed and loaded on an automobile or the like, and the outside air flows from one vent 16 through the one absorbent layer 30 into the accommodation chamber and passes through the other absorbent layer 30 by traveling wind. However, the other vent 16 is allowed to flow out. The hydrogen phosphide gas is removed from the outflowing gas in the other absorbent layer 30 adjacent to the vent 16.
[0020]
The handle 78 of each residue case 70 includes a vertical portion 79 extending upward from the side edge 74 of the plate portion, thereby separating the plate portion 72 of the upper residue case 70 from the plate portion 72 of the lower residue case. The generated hydrogen phosphide gas flows through the gap 81 between the upper and lower plate portions, and comes into contact with the absorbent layer 30. The container 8 is transported after storing the residue case 70 and then closing the upper lid 60. When the amount of air flowing into the storage chamber 12 from the vent 16 is not sufficient, air is supplied into the storage chamber 12 by a pump (not shown) through the air supply port 20 to maintain the hydrogen phosphide concentration at a low value. And the temperature rise in the storage chamber 12 is suppressed. Further, even when the fumigant residue 6 contains a large amount of undecomposed components or when it is stored for a long period of time, air is supplied into the accommodation chamber through the air supply port 20.
[0021]
The air supply port 20 also serves as a concentration measurement port for sampling the hydrogen phosphide gas concentration in the container, but the air supply port and the concentration measurement port are appropriately separated. The concentration of hydrogen phosphide gas in the container is sampled through the measurement port at an appropriate time, the gas concentration is measured, the state of decomposition of the undecomposed residue is observed, and safety is confirmed.
[0022]
【The invention's effect】
Undecomposed fumigant residue remaining after fumigation with fumigant containing hydrogen phosphide generates hazardous hydrogen explosive gas with toxicity and explosive properties. Although the transportation work for transporting to the processing plant is also dangerous, by using the transport container of the present invention, hydrogen phosphide gas is not released to the outside of the container, and hydrogen phosphide is contained in the container. Since the gas concentration does not become high enough to cause an explosion, it can be safely transported. Since the container of the present invention has a simple structure, it is easy to handle and the manufacturing cost is low. Further, by using the container of the present invention, the fumigant residue can be safely stored for a short period. The container of the present invention is economical because it can be used repeatedly by replacing or cleaning and regenerating activated carbon.
[Brief description of the drawings]
FIG. 1 is a schematic vertical sectional view showing an embodiment of a residue carrying container and a residue case according to the present invention.
FIG. 2 is a perspective view showing a residue case according to an embodiment of the present invention.
FIG. 3 is a perspective view showing an embodiment of a residue carrying container and a residue case according to the present invention.
[Explanation of symbols]
6: Residue, 8: Container: 10: Main body case, 12: Storage chamber, 14: Upper opening, 16: Vent, 18: Side wall, 25: Fastener, 28: Handle, 30: Absorbent layer, 32: Activated carbon , 34: wire mesh, 36: absorbent case, 38: cap, 42: caster, 50: vent cover, 60: upper lid, 65: fastening portion, 70: residue case, 72: plate portion, 74: side edge, 76: mesh part, 78: handle, 79: vertical part, 81: gap.

Claims (8)

  A container (8) for carrying a fumigant residue, comprising a main body case (10), an upper lid (60) and a vent cover (50), the main body case being capable of storing a fumigant residue. It has a storage chamber (12), an absorbent layer (30) capable of absorbing hydrogen phosphide gas, an upper opening (14), and a vent (16), and the upper opening allows the residue to enter and exit the storage chamber. The upper cover can open and close the upper opening of the main body case, the vent cover can open and close the vent (16) of the main body case, and the storage chamber (12) of the main body case has an absorbent layer A container characterized in that it can communicate with the outside of the main body case via (30) and the vent (16). The absorbent layer is container according to claim 1, characterized in that it consists of granular activated carbon contained in the absorbent case (36) having two wire mesh in parallel to each other.   The absorbent case is detachably attached to the main body case and has an opening that can be opened and closed by a cap. The absorbent case can be filled with activated carbon through the opening or discharged from the absorbent case. A container according to claim 2, characterized in that it is possible.   The main body case has a substantially rectangular horizontal cross section, a vent is formed in each of the pair of side walls, a handle is provided in each of the other pair of side walls, and a caster is attached to the bottom. The container according to any one of claims 1 to 3, wherein the container is a container.   The container according to any one of claims 1 to 4, wherein the upper lid is connected to the main body case by a plurality of releasable fasteners, and a handle is provided on an upper part thereof.   The storage chamber (12) can store a residue case (70) containing a residue of fumigant, and the upper opening (14) can be put into and out of the storage chamber, and the main body case (10) The container according to any one of claims 1 to 5, comprising a gas concentration measurement port (20) communicating with the storage chamber and an air supply port capable of supplying air into the storage chamber.   A combination of a residue case for storing a fumigant residue and a container for storing and transporting the residue, the container having a main body case, an upper lid and a vent cover, and the main body case is a residue for storing a fumigant residue A storage chamber that can store a case, an absorbent layer that can absorb hydrogen phosphide gas, an upper opening, and a vent, the upper opening has a shape that allows the residue case to be taken in and out, and the upper lid is The upper opening of the main body case can be opened and closed, and the vent cover can open and close the vent of the main body case, and the housing chamber of the main body case can communicate with the outside of the main body case via the absorbent layer and the vent The residue case has a plate part on which the fumigant residue can be spread and placed flat and can be stably stacked up and down in the container storage chamber. .   The residue case further includes a handle having a portion extending upward from the side edge of the plate, and has a plate and a mesh portion on which fumigant residue can be spread and placed flat, and the residue cases are stacked one above the other. The upper residue case plate and the lower residue case plate are separated from each other by a handle of the lower residue plate, and a gas flow gap is formed between them. Combination.

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