JPS63264154A - Device for enriching oxygen - Google Patents

Abstract

PURPOSE:To efficiently produce gas contg. much oxygen content by providing such a gradient of magnetic force that the magnetic field of the center part of a vortex tube is made intensive for the radius direction. CONSTITUTION:An air chamber 2 is provided to a vortex tube 1 and air is introduced in the tangential direction through a nozzle 3 and a magnet coil 5 is wound around a flow rate control valve 4 in a cool air side of the flow rate control valves 4 for cool air and hot air and a gradient of magnetic force is formed so that the magnetic field of the center part of the tube 1 is made intensive for the radius direction. As a result, the concn. of oxygen in the cold air side can be raised.

Description

[Detailed description of the invention] A) Industrial application field The present invention utilizes the paramagnetism of oxygen and combines it with a vortex tube to separate air into high oxygen content and low oxygen content. It is connected to a device that separates the gas into two gases.

Conventional technology Currently, the most common method for separating air into oxygen and nitrogen is to cool and liquefy compressed air and separate it in a rectification column. A method using a thin film that is more permeable, a method using an adsorbent known as breech swing, and a method that sucks in the oxygen-rich air near the magnet, although this has hardly been put into practical use, were also announced. has been done.

C) Problems to be Solved by the Invention Each of the conventional methods has its own characteristics, but the air separation device is usually large-sized, and the method using pressure swing requires regeneration of the adsorbent.

Membrane separation methods require operation at high temperatures like baladium, or are inefficient at room temperature.
The efficiency of sucking in air near a magnetized nozzle or magnet is also not good.

2) Means to solve the problem Vortex tube is known for its ability to flow compressed air tangentially into the tube, thereby obtaining hot and cold airflow from both ends of the tube, and is used in high-temperature working environments. It is used for personal cooling, etc.

However, it is also recognized that vortex tubes have gas separation properties, and when air is used, the oxygen concentration in the air flowing out from the low temperature side increases by 1 degree. However, as it is, it is inefficient and impractical.However, if a magnetic field is applied to this portex tube to attract oxygen to the low temperature side, oxygen has paramagnetism, while nitrogen has antiparamagnetism, so more oxygen flows into the low temperature side, making it possible to efficiently obtain gas with a high oxygen content.

2) Effects and Examples Next, the present invention will be explained in detail.

1st example Air chamber (2) in vortex tube (1)
To set this up, air flows tangentially through the nozzle (3), and when a magnetic field is applied by wrapping a magnetic coil (5) around the cold air flow control valve (4) for cold air and hot air, the cold air side oxygen concentration increased.

Second example In a vortex tube (1) similar to the first example,
The tube was made of plastic so as not to interfere with the formation of the magnetic field, and when a magnetic coil (6) was placed around the tube and a magnetic field was applied, the oxygen concentration on the cold side increased.

Example 3: Inside the vortex tube (1) there is an inner nozzle (
6) and compared a non-magnetic one with one made with a permanent magnet, it was found that the oxygen concentration on the cold air side was higher when a permanent magnet inner nozzle was used.

Other Embodiments If the vortex tube is arranged from the center to the outer periphery so that there is a stronger magnetic field at the center or a stronger magnetic field at the cold side, a magnetic coil or a permanent magnet may be used. A combination of these may also be used.

It is also possible to use the three methods in the examples in combination.

e) Effects of the invention A vortex tube is a vortex tube that allows air to flow in at high speed from several nozzles that are tangentially opened around one end of the tube.
A swirling flow is generated along the wall inside the pipe, flowing towards the end and flowing out to the outside, but it is proportional to the speed of the swirling flow inside and creates a low pressure area in the center of the pipe, so the air The center of the inlet has the lowest pressure, creating a pressure gradient from there toward the center at the other end.

Therefore, a reverse flow occurs in the center of the tube, and if an orifice is provided at the center of the tube at the air inflow end, cool air flows out from the orifice, which is used for personal cooling. At this time, the oxygen concentration in the cold air is 1-2% higher than the oxygen concentration in the warm air. When a magnetic field is applied to this vortex tube so that the magnetic flux density increases toward the center, oxygen is paramagnetic and nitrogen is antiparamagnetic, so oxygen is attracted to the center and nitrogen is repelled. The oxygen concentration in the reverse flow at the center can be further increased by applying a magnetic field.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of Example 1. Figure 2 is a cross-sectional view of Example 2. Figure 3 is a cross-sectional view of Example 3. 1 is a vortex tube 2 is an air chamber 3 is the nozzle 4 is the flow control valve 6 is a magnet coil 6 is the inner nozzle

Claims (1)

[Claims] A vortex tube with a magnetic field applied to produce gas with a high oxygen concentration from air, with a magnetic gradient such that the magnetic field in the center of the tube becomes stronger in the radial direction.