Year1
- 规格：
- 40L
- 含量：
- 99.999%
- 执行标准：
- 国标
Main uses of helium
>
>Industrial helium (
~
) is mainly used for leak detection, filling balloons, helium airships, airships, etc.
>Two pure helium (
) is used for special metal welding and diving breathing special metal smelting.
>Three high-purity helium (
) is used as a carrier gas for standard gas preparation for low-temperature superconducting scientific research and laser cutting chromatography analysis.
>
>(finger, point
finger)
>
First, understand the use of low-purity helium (~)
Due to the physical properties of helium It determines its use in fields such as balloons and helium airships. When helium was less well-known in China, our balloons and airships basically used hydrogen as the floating gas. However, due to frequent accidents, the country clearly stipulated that in Helium must be filled when releasing balloons and airships, so low-purity helium has its own use. Because the gas is inert and has a very small density, second only to hydrogen, it is used in the fields of balloons and airships. It has been widely used, and its main customer groups are advertising companies, wedding companies and meteorological bureaus.
Next, let’s talk about the uses of pure helium.
In the special metal smelting industry, helium has great inertness and good thermal conductivity. When smelting special rare metals such as titanium and zirconium and semiconductors such as silicon and germanium, helium must be used as a protective gas.
The special metal welding industry utilizes the inertness and good thermal conductivity of helium. Helium can be used for welding and cutting of advanced alloys. The mixed gas is suitable for welding aluminum and aluminum alloys, magnesium and magnesium alloys, copper and copper alloys, titanium and titanium alloys. , and metal-based (generally aluminum, magnesium, titanium, etc.) composite materials.
Applications in the medical industry In the medical field, the mixture of oxygen and helium can quickly penetrate the lungs, accelerate the exchange of oxygen and carbon dioxide, and can treat asthma, tracheal and throat diseases, and diving diseases.
Application in the diving industry In diving operations, if ordinary air is used, the nitrogen dissolved in the blood will cause anesthesia below the depth, putting the diver's life in danger. Therefore, when divers are operating in deep water, they cannot use pure oxygen, but need to use a mixture of oxygen and helium instead of air for the diver to breathe, which can ensure the safety of deep water operations.
Next, we will focus on the application of high-purity helium in various industries.
First, let’s learn about the helium mass spectrometer leak detector. The helium mass spectrometer leak detector is mainly used for leak detection in closed pipelines. After a pipeline project is installed, one end of the pipeline is sealed and the other is sealed. Connect one section to the helium mass spectrometer leak detector, evacuate the pipeline to a vacuum state, and then spray helium gas to every valve and interface. Helium has strong diffusivity and particularly strong penetration ability. Therefore, if a leak is found, helium gas It will penetrate into the pipeline, and the helium mass spectrometer leak detector will detect the presence of helium, which means there is a leak. Otherwise, the pipeline is safe.
Key fiber manufacturing companies in the optical fiber industry include Wuhan Changfei, Hangzhou Futong, Jiangsu Zhongtian, Wuhan Fiberhome, Jiangsu Hengtong, Shanghai Corning, Shenzhen Tefa Delac, Chengdu Zhongzhu, Jiangsu Falsheng, etc.
We know that optical fibers are drawn from optical fiber preforms, and optical fiber preforms are usually produced using different chemical vapor deposition processes. Its main raw materials include silicon tetrachloride, helium and hydrogen, among which silicon tetrachloride and helium account for approximately more than the production cost of optical fiber preforms. Due to the world's growing demand for clean energy and semiconductors, the market price of "silicon" materials has begun to show an upward trend, and the price of helium has more than tripled in recent years, which has increased the production cost of optical fiber preforms. The price upward trend is obvious.
Commonly used carrier gases in the chromatographic analysis industry include hydrogen, nitrogen, helium, etc. Hydrogen and helium have a small molecular weight and are often used as carrier gases for packed column chromatography. Nitrogen has a larger molecular weight and is often used as a carrier gas for capillary gas chromatography. Helium is used as a carrier gas for gas chromatography and mass spectrometry. Since nitrogen is difficult to distinguish from and in gas chromatography, helium is used as the carrier gas in gas chromatography mass spectrometry. Nitrogen and helium have stable chemical properties and low reactivity. In gas chromatography separation, the carrier gas only plays the role of a physical carrier. The lower the reactivity, the better, so nitrogen and helium have a wide range of applications.
Protective gas used in the production process of atomic reactor accelerator, fiber optic quartz glass, etc.
Low-temperature research on superconducting nuclear magnetic resonance instrument, etc.
Special metal smelting.
Welding shielding gas.
Carrier gas for chromatographic analysis and other instruments.
Breathing gas in diving medical aerospace flight.
Gas used in electronic industry.
Equipment leak detection, pressurization and cleaning.
Salvage.
Balloon hovercraft (airship) inflated.
Cleaning of cryogenic fuel and oxidant storage tanks and cryogenic radiation detectors in space technology.
Helium, atomic number and atomic weight is a rare gas. The element name comes from Greek, and its original meaning is "sun". In 2000, someone used a spectroscope to observe the surface of the sun and discovered a new yellow spectral line, which they thought belonged to an unknown element on the sun, hence the name helium. Later, when someone treated pitchblende with inorganic acid, an inactive gas was obtained. In 2000, British scientist Ramsey used spectroscopy to prove that it was helium. Later, helium was gradually discovered from other ores, air and natural gas. Helium is present in very small amounts in the Earth's crust and accounts for the most mass by mass in the entire universe, second only to hydrogen. The content of helium in air is. There are two natural isotopes of helium: helium. Basically all helium that exists in nature is helium.
Helium is the least reactive element and basically forms no compounds. Helium is mainly used as a working fluid and ultra-low temperature refrigerant in protective gas gas-cooled nuclear reactors.
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