JP5192927B2 - High-pressure vessel and method of supplying a mixture using the same - Google Patents

Description

  The present invention relates to a supply method for supplying a mixture containing at least one fluid and a high-pressure vessel used in the supply method.

For example, when a gas that is difficult to mix with each other, such as a mixed gas of helium or carbon dioxide and argon, is filled in the high-pressure vessel, it takes a long time for the composition to be uniform inside the high-pressure vessel. For this reason, it is necessary to stir the contents after filling at a predetermined weight ratio.
For example, as disclosed in Japanese Utility Model Laid-Open No. 61-161500 and Japanese Patent Publication No. 1-60291, the high-pressure vessel is rotated. However, this method may require 30 minutes or more to eliminate the variation in gas concentration.

  Further, an invention (Japanese Patent Laid-Open No. Hei 9-133295) in which an injection tube and an extraction tube having several holes in the longitudinal direction are inserted is disclosed as means for improving the uniform composition at the time of filling. This technique is homogenization at the time of filling, and depending on the type of fluid, there is a problem of homogenizing the composition after a long time has elapsed since filling or at the time of supply.

  On the other hand, when a high pressure vessel is filled with a mixture of fine particles and fluid, the fine particles may aggregate or settle over time, and the mixture may not be taken out at a constant concentration. In this case, the composition in the high-pressure vessel may be made constant by stirring the mixture, but it is difficult to stir the mixture in the high-pressure vessel as compared to stirring the mixture in a normal vessel.

As a method for homogenizing the composition at the time of supply in the high-pressure vessel storing the mixture, (1) a high-pressure vessel having a stirring body (Japanese Patent Laid-Open No. 2007-14889), or (2) a high-pressure vessel having a built-in stirrer (Japanese Patent Laid-Open No. 2007-321934).
However, in the high-pressure vessel of (1), the structure is complicated in the airtight part, and when moving the stirring body, each requires a work of attaching wiring, piping, or a driving belt as a driving source, and external force such as impact is used when transporting the cylinder. There is a high possibility of failure and it will be expensive.

Further, in the method (2) in which a stirring bar is built in the high pressure vessel and this is stirred with a magnetic stirrer or the like, it is difficult to obtain a strong stirring force in the high pressure vessel. Further, since a nonmagnetic material is used for the cylinder body, the cylinder is very expensive.
Naturally, neither can use a general high-pressure vessel.
Japanese Utility Model Publication No. 61-161500 Japanese Patent Publication No. 1-60291 JP-A-9-133295 JP 2007-14889 A JP 2007-321934 A

  Therefore, the problem in the present invention is that the mixture can be stirred and mixed well and the time required for homogenizing the composition of the mixture is short, and a high-pressure vessel having a simple structure is obtained. Thus, there is a need for a supply method that can supply a mixture of fine particles and a fluid that easily aggregates and precipitates to an external use destination at a constant mixing ratio.

To solve this problem,
The invention according to claim 1 is a high-pressure container having a container main body for storing a mixture containing at least one kind of fluid and a valve for closing an opening of the container main body, and the mixed fluid integrally attached to the valve the outlet pipe, which is fixed stirrer, by rotation or pivoting of the high pressure vessel is a pressure vessel, wherein the stirrer is agitating the mixture.
The invention according to claim 2 is a supply method for deriving from the high-pressure vessel a mixture containing at least one fluid filled in the high-pressure vessel using the high-pressure vessel according to claim 1, wherein the high-pressure vessel A method of supplying a mixture, comprising: stirring the mixture by rotation or rotation of a container and then extracting the mixture from the high-pressure vessel .

The invention according to claim 3 is the method for supplying the mixture according to claim 2 , wherein the mixture contains a fine solid .
The invention according to claim 4 is the method for supplying the mixture according to claim 2 or 3 , wherein the fluid is a liquefied gas that is liquefied at room temperature and pressure .

The invention according to claim 5 is the method for supplying the mixture according to claim 4 , wherein the liquefied gas is in a supercritical state or a subcritical state .

According to the high-pressure vessel of the present invention, since the agitator is present in the interior thereof, the flow of the internal mixture is disturbed by rotating or rotating the high-pressure vessel with the mixture filled, and the mixture is agitated. And a uniform composition can be obtained in a short time.
Further, since it does not take a complicated apparatus configuration, it can be obtained at a low cost, and it is less likely to cause a failure.

According to the supply method of the present invention, the high-pressure vessel is rotated or rotated to uniformize the composition of the mixture, and then supplied from the high-pressure vessel to an external user. For example, a mixture of fine particles and fluid Can be supplied in a state in which the fine particles are uniformly dispersed throughout.
Of course, even when the mixture is composed of only a fluid, a mixture having a uniform composition can be supplied.

FIG. 1 shows an example of a high-pressure vessel of the present invention.
In FIG. 1, the code | symbol 1 shows a container main body. The container body 1 is a pressure-resistant container made of steel and is also called a so-called cylinder.
A high pressure gas container valve 2 is screwed into an opening at the top of the container body 1. A siphon tube (mixed fluid outlet tube) 4 made of a stainless steel tube or the like is integrally fixed to the lower portion of the valve 2 toward the inside of the container body 1.

  The lower end of the siphon tube 4 extends to near the bottom of the container body 1. Thus, by opening the valve 2, the mixture filled inside can be supplied to the outside user through the siphon tube 4.

A large number of stirring bodies 5, 5,... Are attached to the outer peripheral surface of the siphon tube 4 from the upper part to the lower part.
In FIG. 1, the presence of the stirring bodies 5, 5... Is simply shown, and the shape, mounting form, and the like are shown in detail in FIG. 2.
As shown in FIG. 2, the stirring body 5 is a rectangular lightly curved blade-like plate body made of a stainless steel plate or the like, the surface direction of which is 30 to 45 degrees with respect to the axial direction of the siphon tube 4. It is attached by welding or the like inclined at an angle.

  As for the mounting positions of the stirring bodies 5, 5,..., Four stirring bodies 5, 5,... Are arranged radially and evenly on the outer peripheral surface of the siphon tube 4, and the four stirring bodies 5, 5,. As one set, a plurality of sets of the siphon tubes 4 are arranged in the length direction at intervals, and two sets of the stirring bodies 5 adjacent to each other in the length direction are attached to the outer peripheral surface of the siphon tube 4. However, they may be alternately arranged at 45 degrees.

  FIG. 3 shows another form of attachment of the stirring member 5 to the siphon tube 4. In this example, the point that the surface direction of the stirring bodies 5, 5... Made of a rectangular plate body is parallel to the axial direction of the siphon tube 4 is different from the previous embodiment. Other mounting positions are the same.

  In such a high-pressure vessel, when the high-pressure vessel is rotated or rotated around the axis of the high-pressure vessel in a state where the mixture is filled in the vessel main body 1, the flow of the internal mixture is increased to a large number of stirring bodies 5, 5 .. disturbed and disturbed, whereby the mixture is agitated to a uniform mixing state.

For this reason, even if the mixture is a fluid in a liquid state, a supercritical state, a subcritical state, or a mixture of the fluid and fine particles, each component is uniformly mixed or dispersed.
Therefore, when the mixture is composed of two or more kinds of fluids, a uniform mixed composition can be obtained by rotating or rotating the high-pressure vessel at least once within the period up to the supply after filling the high-pressure vessel. Is obtained and can be supplied to the user.

  When the mixture is composed of a fluid and fine particles, the high-pressure vessel is rotated or rotated immediately before supply, or the mixture is supplied to the user while rotating or rotating the high-pressure vessel. It becomes possible to supply a mixture in a uniformly dispersed state.

In addition to the form in which the stirring bodies 5, 5... Are attached to the siphon tube 4, they may be attached directly to the inside from the valve 2 or to a separate member extended into the container body 1. Furthermore, the stirring body 5 is not plate-shaped but may be rod-shaped or linear.
It does not matter whether the stirrer 5 has rigidity. Further, the stirring member 5 may be fixed inside the container body 1 by a mechanical fixing method such as adhesion, welding, or caulking.

Further, when the mixture is in a gas state, the siphon tube 4 is not necessary. In such a case, a rod-like member or a tubular member is attached to the valve 2 and the stirring bodies 5, 5,. do it. Or you may attach directly to the valve | bulb 2 the stirring body 5 which can stir the inside by rotation or rotation of a high-pressure vessel.
In the case where the high-pressure vessel has a gas injection tube, the gas injection tube may be provided with the stirring members 5, 5,.

Hereinafter, a method for supplying a mixture of fluid and fine solid from a high-pressure vessel will be described.
FIG. 4 shows a specific example of the above-described supply method.
In this example, a high-pressure vessel 6 filled with the mixture is placed on a turntable 7. The turntable 7 can be rotated or rotated by a built-in rotation drive mechanism. The high-pressure vessel 6 placed on the upper surface of the turntable 7 reciprocates within a rotation angle of 90 degrees, and the rotation speed in the middle. Alternatively, the rotation speed can be changed or stopped halfway.

The high-pressure vessel 6 placed on the turntable 7 can be rotated or rotated in the vicinity of its bottom while the outer peripheral portion is sandwiched between three rollers 8, 8, 8 while maintaining an upright state. .
The high-pressure vessel 6 is connected to a supply pipe (not shown) in which the valve 2 is fixed via a flexible pipe 9.
When the mixed gas is supplied, the internal mixed gas is stirred by alternately rotating the high-pressure vessel 6 at the rotation angle θ1 ≦ 90 ° in the above state. Since the rotation angle θ1 is within 90 °, there is no problem even when the flexible pipe 9 is connected to the fixed pipe 10.

FIG. 5 shows another specific example of the supply method.
In this example, the flexible pipe 9 is connected to a rotatable connection fitting 11, and the connection fitting 11 is connected to a supply pipe 10. A swivel joint or the like is used for the connection fitting 11.
At the time of supplying the mixed gas, in the above state, either (1) the high pressure vessel 6 is alternately reversed at the rotation angle θ2, or (2) the high pressure vessel 6 is rotated → decelerated → or stopped → rotated or reversed. By repeating the above, the internal mixed gas is agitated.

Since the connection destination of the flexible pipe 9 is connected to the rotatable connection fitting 11, the rotation angle θ2 can be freely set and can rotate freely within the range.
As shown in FIGS. 3 and 4, the high-pressure vessel 6 can be rotated or rotated not only in an upright state but also in a tilted state or in a laid state. it can.

The supply object in the present invention is a mixture containing at least one fluid filled in a high-pressure vessel (cylinder).
The fluid may be any state of a gas state, a liquid state, a supercritical state, and a subcritical state. As the type of fluid, liquefied gas that becomes liquid at room temperature and pressure, such as carbon dioxide, chlorofluorocarbon, hydrofluoroether, dimethyl ether (DME), and liquefied petroleum gas (LGP), is preferable because it is easy to handle at room temperature. Further, a liquefied gas that becomes liquid at a low temperature and under pressure, such as nitrogen, argon, krypton, etc., can also be used. Also, methane, ethane, acetone, etc., which are fluids showing a supercritical state, can be used.

Examples of the mixture include a mixture of fluids and a mixture of a fluid and a fine solid. As a mixture of fluids, any combination such as a gas state, a liquid state, a gas state and a liquid state may be used. Specific examples of the combination include helium or a mixed gas of carbon dioxide and argon.
The shape of the minute solid may be any shape such as a particle shape, a fiber shape, a cylindrical shape, a linear shape, a rod shape, or a coil shape. Also, the material is not limited.

  For example, metal particles such as nickel, gold, silver, palladium, platinum, iridium, copper, indium, cobalt, lithium, alumina, silica, titania, zinc oxide, copper oxide, magnesium oxide, indium tin oxide (ITO), etc. Metal oxide fine particles, metal non-oxide fine particles such as metal nitride fine particles, metal complex fine particles such as lead complex, cobalt complex, nickel complex, platinum complex, fullerene, carbon black, carbon fiber, ketjen black, carbon nanotube, Carbon-based fine particles such as carbon nanocoils and carbon nanohorns, polymers such as polytetrafluoroethylene, polypropylene, polycarbonate, urethane resin, silicone resin, silicone rubber, phenol resin, polyethylene, nylon resin, polystyrene Fine particles.

Further, when a supercritical or subcritical fluid is used, there are the following advantages.
(1) Polymer fine particles and metal complexes can be dissolved in a high-pressure vessel.
(2) Since the viscous resistance is lower than that of a normal liquid in a high-pressure vessel, the stirring power is low.
(3) When the fine particles in the high-pressure vessel are used for polymer injection molding, the fluidity of the polymer can be increased (the viscosity is decreased).
(4) When the object to which fine particles in the high-pressure vessel are sprayed is a polymer substrate, there is a surface swelling effect.

In the case of minute solids with high cohesive properties such as carbon nanotubes, carbon nanocoils, and metal fine particles, the present invention is particularly effective because it aggregates in a high-pressure vessel and is difficult to supply at a constant concentration.
The mixture may contain various additives such as a dispersant that improves the dispersibility of the fine solid. As the dispersant, for example, a surfactant is used. The mixture of the fine solid and the fluid may further contain an organic solvent such as chloroform and ethanol, and a solvent such as water.

It is a schematic sectional drawing which shows the example of the high pressure container of this invention. It is a schematic perspective view which shows the principal part in the example of the high pressure container of this invention. It is a schematic perspective view which shows the principal part in the other example of the high pressure container of this invention. It is a schematic perspective view which shows the example of the supply method of this invention. It is a schematic perspective view which shows the other example of the supply method of this invention.

Explanation of symbols

1 .... Vessel body, 2 .... Valve, 4 .... Siphon tube, 5 .... Agitator, 6 .... High pressure vessel, 7 .... Rotary disc, 8 .... Roller, 9 .... Flexible piping, 10 .... Fixed Piping, 11. ・ Connecting bracket

Claims (5)

A high-pressure container having a container body for storing a mixture containing at least one fluid, and a valve for closing an opening of the container body,
A stirring body is fixed to a mixed fluid outlet pipe integrally attached to the valve,
The high-pressure vessel, wherein the stirring body stirs the mixture by rotation or rotation of the high-pressure vessel. A method for supplying a mixture containing at least one fluid filled in the high-pressure vessel from the high-pressure vessel using the high-pressure vessel according to claim 1 ,
A method for supplying a mixture, comprising: stirring the mixture by rotation or rotation of the high-pressure vessel and then extracting the mixture from the high-pressure vessel. The method of supplying a mixture according to claim 2, wherein the mixture contains a fine solid. The method for supplying a mixture according to claim 2 or 3, wherein the fluid is a liquefied gas that is liquefied at room temperature and pressure. The method for supplying a mixture according to claim 4, wherein the liquefied gas is in a supercritical state or a subcritical state.

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