1. Pressure swing adsorption of PSA for nitrogen production
Pressure Swing Adsorption (PSA) is a nitrogen equipment designed and manufactured by pressure swing adsorption technology with clean compressed air as raw material and physical method. Nitrogen making machine uses imported carbon molecular sieve (CMS) as adsorbent and adopts pressure swing adsorption principle at room temperature to separate air to produce nitrogen with different purity. 2. Principle of PSA
C molecular sieves can absorb both oxygen and nitrogen in air at the same time, and their adsorption capacity increases with the increase of pressure, and there is no significant difference in the equilibrium adsorption capacity of oxygen and nitrogen at the same pressure. Therefore, it is difficult to separate oxygen and nitrogen effectively only depending on the change of pressure. If the adsorption rate is further considered, the adsorption characteristics of oxygen and nitrogen can be effectively distinguished. The diameter of oxygen molecule is smaller than that of nitrogen molecule, so the diffusion rate is hundreds of times faster than that of nitrogen. Therefore, the adsorption rate of carbon molecular sieve for oxygen is very fast, reaching more than 90% in about 1 minute. At this time, the adsorption capacity of nitrogen is only about 5%, and the content of oxygen and nitrogen in the air is 21% and 78%, respectively. The remaining nitrogen molecules are enriched at one end of the adsorber to form the product nitrogen into the nitrogen process buffer tank.
3. Characteristics of PSA Nitrogen Making Equipment for Carbon Molecular Sieve
1) Nitrogen production is convenient and fast:
Advanced technology and unique air distributor make the air distribution more uniform and make efficient use of the adsorption efficiency of carbon molecular sieve. The qualified product nitrogen can be provided in about 10 minutes.
2) More economical than other nitrogen supply methods:
_PSA process is a simple method of nitrogen production. Air is used as raw material and energy consumption is only the power consumed by air compressor. It has the advantages of low operation cost, low energy consumption and high efficiency.
3) The design of Mechatronics realizes automatic operation:
_Imported PLC controls full automatic operation, adjustable nitrogen flow pressure and continuous display, which can realize unattended operation.
4) Wide range of applications:
_Protective gas in metal heat treatment process, nitrogen-filled purifying purging and explosion-proof of gas in chemical industry and various storage tanks and pipelines, oxidation-proof and explosion-proof gas in rubber and plastic products, nitrogen-filled and oxidation-proof packaging in food industry, fresh-keeping and prolonged shelf life, and container covering in purification process and preparation process of beverage industry Cover gas, nitrogen-filled packaging and containers in pharmaceutical industry, nitrogen-filled and oxygen-exhausted, protective gas for brazing and reflow welding of electronic components and semiconductor production processes in electronic industry, etc.
6) Technical indicators:
_Flow: 5-5000Nm3/h
_purity: 95% - 99.9995% (no oxygen content, high purity nitrogen prepared by two-step method)
Dew Point of_: <40 ~70 ~
_pressure: <0.1~0.8Mpa adjustable
4. System Use
_The special nitrogen machine for oil and gas industry is suitable for nitrogen protection, transportation, coverage, replacement, emergency, maintenance, nitrogen injection and production in oil and gas exploitation, coastal and deep-sea oil and gas exploitation. It has the characteristics of high safety, strong adaptability and continuous production.
_Special nitrogen machine for chemical industry is suitable for processing industries of petrochemical industry, coal chemical industry, salt chemical industry, natural gas chemical industry, fine chemical industry, new materials and their derivative chemical products. Nitrogen is mainly used in covering, purging, replacement, cleaning, pressure transportation, chemical reaction agitation, chemical fiber production protection, nitrogen filling protection and other fields.
_Special nitrogen fertilizer machine for metallurgical industry is suitable for heat treatment, bright annealing, protective heating, powder metallurgy, copper and aluminium processing, magnetic material sintering, precious metal processing, bearing production and other fields. It has the characteristics of high purity, continuous production, and some processes require a certain amount of hydrogen in nitrogen to increase brightness.
_. The special nitrogen machine for coal mine industry is suitable for fire prevention and extinguishing, gas and gas dilution and other fields in coal mining. It has three specifications: ground fixed type, ground movable type and underground movable type, which fully meets the nitrogen demand under different working conditions.
_Special nitrogen machine for rubber tire industry is suitable for nitrogen protection, forming and other fields in vulcanization process of rubber and tire production. Especially in the production of all-steel radial tire, the new process of nitrogen vulcanization has gradually replaced the steam vulcanization process. It has the characteristics of high nitrogen purity, continuous production and high nitrogen pressure.
