Pressure swing adsorption process (PSA) is a new gas separation technology, its principle is to use molecular sieve to different gas molecules "adsorption" performance differences and the gas mixture is stripped, so as to extract higher purity, better quality nitrogen. The purity of nitrogen can meet 95%-99.9995%
Process principle:
PSA is based on air as a raw material, using a high-efficiency, highly selective solid adsorbent for nitrogen and oxygen to separate nitrogen and oxygen in the air.
The separation effect of carbon molecular sieve on nitrogen and oxygen is mainly based on the different diffusion rates of the two gases on the surface of carbon molecular sieve. Oxygen with smaller diameter diffuses faster and more enters the molecular sieve solid phase. In this way, nitrogen can be enriched in the gas phase. After a period of time, the adsorption of oxygen by the molecular sieve reaches equilibrium. According to the characteristics of the adsorption amount of adsorbed gas by the carbon molecular sieve under different pressures, the pressure is reduced to remove the adsorption of oxygen by the carbon molecular sieve, which is called regeneration. The pressure swing adsorption method usually uses two towers in parallel, alternating pressure adsorption and decompression regeneration, so as to obtain a continuous flow of nitrogen.
Process flow chart:
Technical index parameters:
Flow rate: 3~2000nm3/hr
Purity: ≥95-99.999%
Pressure: 0.01-0.8Mpa(adjustable within)
Dew point: -45℃
Oxygen content: ≤5ppm
Filtration accuracy: 0.001ppm
Model number | Flow rate（m3/hr） | Purity(%) | High purity（%） | Stress(Mpa) | Power source | Technology | Dew-point（℃） | Low dew point（℃） | Finished product |
XTFD-10 | 10 | ≥95 | 99.9995 | ≤0.8 | Natural air | PSA Pressure swing adsorption type | -45 | -70 | Nitrogen |
XTFD-20 | 20 | ≥95 | 99.9995 | ≤0.8 | -45 | -70 | Nitrogen | ||
XTFD-30 | 30 | ≥95 | 99.9995 | ≤0.8 | -45 | -70 | Nitrogen | ||
XTFD-50 | 50 | ≥95 | 99.9995 | ≤0.8 | -45 | -70 | Nitrogen | ||
XTFD-100 | 100 | ≥95 | 99.9995 | ≤0.8 | -45 | -70 | Nitrogen | ||
XTFD-200 | 200 | ≥95 | 99.9995 | ≤0.8 | -45 | -70 | Nitrogen | ||
XTFD-300 | 300 | ≥95 | 99.9995 | ≤0.8 | -45 | -70 | Nitrogen | ||
XTFD-500 | 500 | ≥95 | 99.9995 | ≤0.8 | -45 | -70 | Nitrogen | ||
XTFD-1000 | 1000 | ≥95 | 99.9995 | ≤0.8 | -45 | -70 | Nitrogen | ||
XTFD-1500 | 1500 | ≥95 | 99.9995 | ≤0.8 | -45 | -70 | Nitrogen | ||
XTFD-2000 | 2000 | ≥95 | 99.9995 | ≤0.8 | -45 | -70 | Nitrogen |
Industry application range
1, SMT industry applications
Nitrogen reflow welding and wave soldering, nitrogen can effectively inhibit the oxidation of solder, improve welding wettability, speed up wetting speed to reduce the production of tin balls, avoid bridging, reduce welding defects, a number of SMT electronics manufacturers supporting hundreds of cost-effective pressure swing adsorption nitrogen machine, in the SMT industry has a huge customer base, SMT industry share of more than 90%.
2, semiconductor silicon industry applications
Atmosphere protection, cleaning, chemical recycling for semiconductor and integrated circuit manufacturing processes.
3, semiconductor packaging industry applications
Encapsulated, sintered, annealed, reduced and stored with nitrogen. Hongbo pressure swing adsorption nitrogen making machine helps major manufacturers in the industry to win the opportunity in the competition and achieve effective value enhancement.
4, electronic components industry applications
Selective welding, purging and packaging with nitrogen. Scientific nitrogen inert protection has proven to be an essential part of the successful production of high-quality electronic components.
5, chemical industry, new material industry application
Nitrogen is used to create an oxygen-free atmosphere in the chemical process, improve the safety of the production process, and the power source of fluid transportation. Oil: can be used in the system pipeline container nitrogen purge, storage tank nitrogen filling, replacement, leak detection, flammable gas protection, also used in diesel hydrogenation and catalytic reforming.
6, powder metallurgy, metal processing industry
Heat treatment industry applications of steel, iron, copper, aluminum products annealing, carbonization, high temperature furnace protection, low temperature assembly of metal parts and plasma cutting.
7, food, pharmaceutical industry applications
Mainly used in food packaging, food preservation, food storage, food drying and sterilization, medical packaging, medical replacement gas, medical conveying atmosphere, etc.
8. Other fields of use
In addition to being used in the above industries, nitrogen machine is also widely used in many fields such as coal mine, injection molding, brazing, tire nitrogen rubber, rubber vulcanization and so on. With the progress of science and technology and the development of society, the use of nitrogen devices is more and more extensive, on-site gas (nitrogen machine) with its investment, low cost, easy to use and other advantages have gradually replaced liquid nitrogen evaporation, bottled nitrogen and other traditional nitrogen supply methods.
About operating energy consumption
1, nitrogen production and energy saving effect
The adsorption tower of the nitrogen machine is switched once a minute, and the pressure boost time of each switch is only 1 to 2 seconds, that is to say, the instantaneous gas consumption is very large, if there is no buffering effect of the gas storage tank, the compressed air directly enters the system in the instant can not handle a lot of compressed air, so that a lot of compressed air containing water and oil directly enters the nitrogen machine, which must poison the molecular sieve. Shorten the service life of molecular sieve, reduce the gas production rate, and increase the user's operating cost.
2, provide a stable air source
If there is a gas tank in the nitrogen machine system, the output air of the main engine has a buffer, the air source can be better maintained at a set value, and the gas system can get a stable pressure, which is necessary for the use of modern factories.
3. Good air quality
The compressed air out of the nitrogen machine is mainly sent to the gas storage tank, where the air will stay for a certain time, can accumulate foreign bodies such as impurities and water in the air, and the temperature of the compressed air is also reduced, even if there is no freeze dryer, it can also send relatively high-quality air.
4, in fact, the role of savings is a reservoir, the air compressor is an air source, and the gas storage tank is a pool. The gas storage tank can balance the air pressure within a certain pressure scale according to the setting, buffer the uncertainty of the air pressure, reduce the number of launches of the main engine, and other gas storage tanks can also play the function of accumulating foreign bodies such as impurities and water in the air.
About Safe use
1, do not put in the sun, rain, wind or relative humidity greater than 85% of the place. Do not place in dusty, corrosive or flammable gas environment. Do not place in areas where there is a risk of vibration or condensation freezing. Do not get too close to the wall to prevent poor ventilation. It is necessary to use in the environment with corrosive gases, and the dryer with copper tube treated with rust prevention or stainless steel heat exchanger type should be selected. It should be used at ambient temperature below 40 degrees.
2, the inlet of compressed air should not be connected incorrectly. In order to facilitate repair, to ensure repair space, should be set up bypass pipeline. To prevent the vibration of the air compressor to the dryer. Pipe weight should not be added directly to the dryer.
3, the drain pipe do not stand up, do not discount or squish.
4, the power supply voltage promise is not firm less than 10%. Leakage break protectors of appropriate capacity should be provided. Grounding is necessary before use.
5, the compressed air inlet temperature is too high, the ambient temperature is too high (more than 40 degrees), the use of flow beyond the rated amount of air, the voltage is not firm more than 10%, ventilation is too poor (winter also to change air, otherwise the room temperature will rise), and other cases, the protection circuit will play a role, the indicator light off, intermittent operation.
6. When the air pressure is higher than 0.15MPa, the drain of the normally open automatic drainer can be closed. When the displacement of the cold and dry machine is too small, the drain is open and air is blown out.
7, the compressed air quality is poor, such as mixed with dust and oil, these stolen goods will adhere to the heat exchanger, reduce its efficiency, and drainage is also easy to fail. Expect a filter to be set at the inlet of the dryer and acknowledge drainage at least once a day.
8. The vent of the dryer should be vacuumed once a month.
9. Switch on the power supply, and then switch on the compressed air after the operation is stable. After interrupted operation, it is necessary to wait more than 3 minutes before starting again.
10, if the use of automatic drainage, should often check whether the drainage function is normal. Always clean the dust on the condenser. Always check the pressure of the refrigerant to determine whether the refrigerant leaks and whether the capacity of the refrigerator has changed. Check whether the temperature of the condensate removal water is normal.
About maintenance reminder
1. Maintenance time of air compressor: the first guarantee is 500 hours, and the future work is maintained every 3000 hours.
2. Air compressor maintenance content: Replace air compressor oil, replace internal accessories: oil filter, air filter, oil core.
3. Air purification end maintenance: air four-stage filtration needs to replace the filter element, depending on the surrounding environment, the general filter element replacement in about 6000 hours.
4. Freeze dryer: Generally not needed, if necessary, add refrigerant.
5. Adsorption dryer maintenance: Replace the raw material activated alumina or molecular sieve, depending on the frequency of use, the general replacement time is 1 to 2 years.
6. Supercharger equipment maintenance: regularly replace the piston ring, add grease, etc.
7. If you need more information, please contact our staff!
8. Thank you for reading, I wish you a happy life!
