Brief introduction of main equipment of nitrogen production process
Aug 11, 2011
Author:
DEAR AST
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The brief introduction of the air filter and air compressor in this process is the same as that of the chilled nitrogen production process.
1. Cold dryer: it is a device used to reduce the temperature of compressed air before entering the air drying purifier to extract oil and water. It usually adopts post cooler with the structure of column pipe type, casing type, cooling sheet type and so on.
2. Oil-water separator: its function is to separate the oil and moisture contained in the compressed air and make the compressed air get Primary purification.
3. Air drying purifier: Compressed air still contains certain moisture after passing through the post cooler, and its content depends on the temperature of the air. The drying process of compressed air generally adopts molecular sieve absorption method and freeze drying method.
4. Pressure conversion absorption nitrogen generation device: the adsorbents used are usually 5A Molecular sieve or carbon molecular sieve, and the regeneration mode is no heat regeneration, high pressure adsorption, low pressure or normal pressure analysis. This is the core equipment for separating nitrogen.
5. Nitrogen purification equipment: including oxygen removal Tower, adsorption dryer and water condenser. The oxygen removal Tower is a catalytic reactor using palladium as catalyst. The adsorbents of the adsorption dryer are molecular sieves, and the regeneration mode is thermal regeneration (electric heating ).
PSA nitrogen production has simple technological process, high degree of automation and fast gas production (15 ~ 30 minutes), low energy consumption, product purity can be adjusted in a larger scope according to the user's needs, convenient operation and maintenance, low operating cost, strong adaptability of the device and other features. In 1000Nm3The users of medium and small-sized nitrogen below/h are widely used, and PSA nitrogen production has become the preferred method for medium and small-sized nitrogen users.
