A kind of pressure swing adsorption nitrogen production system and nitrogen production method

Abstract

The invention relates to the technical field of gas preparation, in particular to a pressure swing adsorption nitrogen production system and a nitrogen production method thereof, including an air compressor, a compressed air filter assembly, a buffer gas storage tank, an adsorption tower group, a nitrogen tank, connecting pipelines and The valve group is characterized in that: the air compressor, the compressed air filter assembly, the buffer gas storage tank, the adsorption tower group, and the nitrogen tank are sequentially connected through the connecting pipeline, the valve group is arranged on the connecting pipeline, and the air compressor The input end of the machine is provided with an air intake filter device, which is used for the air intake filter of the air compressor, which provides a filter and impurity removal for the initial effect of the air intake of the air compressor during the preparation of nitrogen, reducing the need for later The frequency of replacing the filter element of the filter equipment reduces the production cost, reduces the impurity removal pressure of the later filter equipment, and ensures the filtration effect of the later filter equipment. The pressure swing adsorption nitrogen production system and its nitrogen production method.

Description

technical field [0001] The invention relates to the technical field of gas preparation, in particular to a pressure swing adsorption nitrogen production system and a nitrogen production method thereof. Background technique [0002] The basic principle of pressure swing adsorption is to use the adsorbent to have different adsorption capacities for the adsorbate under different pressures, and to selectively adsorb the components of the gas mixture to be separated under a certain pressure. Under the condition of selective adsorption of the adsorbent, the impurity components in the raw material are removed by pressure adsorption, and these impurities are desorbed under reduced pressure to regenerate the adsorbent, so the nitrogen in the air can be separated and used to prepare nitrogen. [0003] Existing equipment for preparing nitrogen generally uses carbon molecular sieves as adsorbents, and carbon molecules in carbon molecular sieves are easily infected by water molecules, co...

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Problems solved by technology

[0003] Existing equipment used to prepare nitrogen generally uses carbon molecular sieves as adsorbents, and carbon molecules in carbon molecular sieves are easily contaminated by water molecules, corrosive gases, acid gases, dust, oil molecules, etc., resulting in inactivation of carbon molecules and reduced activity. , resulting in a decline in the performance of nitrogen production, and before the gas mixture is in contact with the adsorbent, the gas mixture needs to be fully filtered to prevent the carbon molecules in the carbon molecular sieve from being eroded. The existing nitrogen production equipment usually uses an air compressor to clean the environment The mixed air is sucked and pressurized, and the pressurized mixed air is filtered and removed by the filter equipment, and then enters the adsorption tower group to interact with the adsorbent to produce nitrogen. Because the air compressor is sucking the mixed air in the environment When the lack of initial effect of filtering impurities, it will lead to the accumulation of dust and environmental dirt in the air duct of the air compressor, making the filter equipment need to replace the filter element frequently, resulting in increased production costs, thereby increasing the pressure of the filter equipment to remove impurities, Cause poor filtering effect

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