JPH03180135A - Vaporization of fumigant - Google Patents

Abstract

PURPOSE:To accomplish fumigation at any place with a small-sized, lightweight vaporizer made feasible, by using a packet lime as the heat source for vaporizing a fumigant packed in a cylinder in a pressurized and liquefied state. CONSTITUTION:The main body 1 of a vaporizer with a heat exchanger made up of a meandering metallic tube is charged with an appropriate amount of water, and a fumigant feed port 5 and a fumigant cylinder, and a fumigant outlet 6 and a chemical feed hose, are connected to each other, respectively. A specified number of packs 4 filled with each specified amount of lime are then charged through an inlet 3, and at a point when the temperature of water reached normally 50-90 deg.C, the fumigant cylinder is opened to start fumigation. With this method, when the fumigation is made using a cylinder containing 10kg of a fumigant, the amounts of lime and water needed for vaporizing the fumigant are ca.2.5kg and 7-10l, respectively, and 10-15l will be enough for the volume of the main body of the vaporizer.

Description

[Detailed Description of the Invention] Field of Application The present invention relates to a method for vaporizing a fumigation agent that has been liquefied under pressure and packed in a cylinder, and more specifically, a method for vaporizing the fumigation agent, which enables fumigation at any location. Concerning vaporization methods.

<Prior art> Traditionally, imported logs, grains, fruits and vegetables, cut flowers, etc.
They are fumigated to kill the adults, larvae, octopuses, eggs, etc. that are parasitic on them. For example, logs are fumigated at ports where they are unloaded, water storage areas, and other locations throughout the country.

This fumigation uses a pressurized liquefied fumigant, such as methyl bromide, which is packed in a cylinder, and during fumigation, it is necessary to vaporize the pressurized liquefied fumigant. To vaporize the fumigant, a device is usually used that passes the fumigant through heated water through a meandering metal tube.
Propane gas is used as a heat source for heating water.

For this heating, in order to perform fumigation efficiently, the water needs to be heated quickly, and the heat lost during vaporization needs to be immediately replenished, so a large gas burner and propane gas cylinder are required. Therefore, the size of the vaporizer that accommodates such a gas burner has to be increased, and the size of the vaporizer itself alone is 130K1 or more.

On the other hand, as mentioned above, fumigation sites are scattered all over the country.
There are many places where fumigation is carried out irregularly, and it is not possible to install vaporizers in all of them, so the vaporizers and blobane gas cylinders are often moved every time fumigation is carried out. This movement is a difficult task, and there is a desire for a vaporizer that is convenient to move and capable of fumigating at any location. Moreover, using propane gas does not allow fumigation in areas where open flames are prohibited.

<Object of the invention> The object of the invention is to miniaturize a vaporizer for convenient transportation.
It is an object of the present invention to provide a heating means that is light in weight and capable of fumigating at any location.

The present inventor conducted various studies on heating means in place of large gas burners and propane gas cylinders, and considered using an immersion heater in place of propane gas.
This method does not allow fumigation in areas where there is no power source. Furthermore, as a result of repeated consideration, if quicklime is used as a heat source,
They came up with the idea of being able to rapidly heat water anywhere without the need for propane gas or electricity, and after further intensive research on how to use quicklime, they completed the present invention.

<Configuration of the Invention> The present invention provides a method for vaporizing a pressurized liquefied fumigant packed in a cylinder by passing it through a meandering metal tube through heated water for fumigation. This is a fumigant vaporization method characterized by using packed quicklime.

The present invention will be explained below with reference to the drawings. FIG. 1 is a perspective view showing an example of a vaporizer suitable for carrying out the present invention, and FIG. 2 is a perspective view showing a meandering metal tube inserted into the vaporizer shown in FIG. 1 is the main body of the vaporizer, 2 is the lid, 3 is the inlet for adding water or pack (quicklime), 4 is the bag filled with a certain amount of quicklime, 5 is the supply port for pressurized liquefied fumigant, 6 is the vaporized fumigant outlet, 7 is the flow meter, 8
9 is a carrying handle, 9 is a lid hook, and 10 is a meandering metal pipe, one end of which is connected to a fumigation agent supply port 5, and the other end connected to a fumigation agent outlet 6.

A suitable amount of water is charged into the vaporizer body 1, the fumigant supply port 5 is connected to the fumigant cylinder, the fumigant outlet 6 is connected to the dosing hose, and a pack is filled with a fixed amount of quicklime from the input port 3. Pour in a predetermined number of 4 and keep the water temperature at a predetermined temperature, usually 50-9.
When the temperature rises to 0°C, the fumigant cylinder is opened and fumigation begins.

By this method, when fumigating using a 10 kg human fumigant cylinder, the amount of quicklime required to vaporize the fumigant is approximately 2.5 kg, even considering the loss of heat, and the amount of water is 7 to 7 kg.
10 liters (the amount of water required to generate heat from quicklime is approximately 0.8 liters), and the capacity of the vaporizer body is sufficient if it is 10 to 15 fl.

The quicklime used is packaged in quantitative packs, so by adjusting the number and rate of addition, it is possible to easily adjust the temperature rise rate of water in the vaporizer, temperature during fumigation work, fumigation time, etc. . Furthermore, if the bag is wrapped in a moisture-proof thin film such as aluminum foil, handling is extremely easy. Furthermore, as shown in FIG. 1, an appropriate number of bags can be connected in advance to further facilitate their use.

The amount of quicklime in one bag can be set arbitrarily depending on the amount of fumigant used, but is usually about 100 to 10,000. Also, the amount of quicklime in one pack can be set to 100, for example.
It is also possible to have multiple types such as 0g and 200g and use them depending on the situation.

A viewing window may be provided on the outer wall of the vaporizer body 1, or a heat insulating layer may be provided to prevent danger or to retain heat, and a basket may be provided at the input port 3 to facilitate the removal of used packs. You can.

<Effects of the Invention> The present invention makes it possible to reduce the size and weight of a fumigant vaporizer, facilitates movement and fumigation work, and furthermore enables fumigation in any location, including a place where fire is prohibited. And the effect it produces is exceptional.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a perspective view showing an example of a vaporizer suitable for carrying out the present invention, and Fig. 2 shows a meandering metal tube inserted inside the vaporizer shown in Fig. 1. FIG. In the figure, 1 is the vaporizer main body, 2 is the lid, 3 is the inlet, 4 is a bag filled with a fixed amount of quicklime, 5 is the supply port for pressurized liquefied fumigant, 6 is the outlet for vaporized fumigant, 10 is a meandering metal tube. Back: 1990, November 2, 1990 (Flash procedure amendment type), Office of the Director General of Blueprints 1, Indication of the case, Patent Application No. 1-317628, 2゜Name of the invention, Method of vaporizing fumigant 3゜Relationship with the case by the person making the amendment Patent Applicant: 1-6-21 Nishi-Shinbashi, Minato-ku, Tokyo Teijin Kasei Ltd. 4゜ Agent: 1-1, Uchisaiwai-cho 2], Chiyoda-ku, Tokyo (Iino Building) Teijin Limited Specification Page 5, No. 10 The line that says “about 0, cap]” should be changed to “about 0, cap]”

Claims (1)

[Claims] When pressurized liquefied fumigant packed in a cylinder is passed through heated water through a meandering metal tube to vaporize it and provide it for fumigation, quicklime packed in quantitative packs is used as a heat source for the heated water. A method for vaporizing a fumigant, characterized by: