Maintenance and servicing of the nitrogen generator equipment:
The air compressor (set) provides the required compressed air for the PSA pressure adsorption nitrogen generation system. The flow rate, pressure, etc. requirements are determined based on the gas consumption of the PSA pressure adsorption nitrogen generation system. The efficiency (consumption) of the PSA pressure adsorption device will mainly be determined by the performance of the molecular sieve, the process flow, and the structure of the adsorption unit. The air compressor should meet the following indicators:
In actual use, daily checks of the air compressor include: operating temperature (≤ 105℃), working pressure (0.8 - 1.0 MPa), water pressure (0.3 - 0.6 MPa), etc. Monthly checks include oil level, no leakage at pipeline connections, etc., quarterly maintenance includes cleaning the inlet filter screen, cleaning the air filter core, inspection of connection parts, etc., and annual maintenance is carried out by professional engineers from INGERSOLL RAND according to the "Maintenance Manual" of INGERSOLL RAND products. In daily use, the maintenance recommendations and priorities in the manual should be followed:
When a general fault occurs in the equipment, the equipment responsible person should perform the troubleshooting according to the fault diagnosis guidance in the manual, and if it cannot be resolved, contact the professional engineer from INGERSOLL RAND. The main factors affecting the performance of the air compressor in daily use are temperature, and the main factors affecting temperature (under the condition of constant pressure and flow) are: season, water temperature and water quality. The cooling water pipe of this equipment is designed with an inlet and outlet diameter of 40mm for tap water, with a water consumption of approximately 9t/h and direct discharge. If the water is not recycled, it will be a considerable waste. If the cooling water is recycled for secondary use, it will also be a considerable investment (the local water hardness is between 380mg/L and 410mg/L). Summer is the time when the air compressor is most tested for equipment performance and is also a test of whether the initial type selection of the cooling unit is appropriate. In the PSA pressure adsorption nitrogen generation system, the air compressor has the highest investment in equipment maintenance and servicing funds. When choosing this type of nitrogen generation method, it is necessary to conduct preliminary market research and investigation and plan the subsequent maintenance funds investment.
Cold type dryer (Model/Specification: IDS-150AC; 20Nm³/min) Daily checks include: whether the condensate water discharged by the cold dryer and the sewage discharged by the third-level filter are unobstructed, whether the cooling agent pressure (0.3 - 0.6 MPa) and the compressed air pressure (＜1.0MPa) are normal; Maintenance and servicing include regular blowing of the heat exchanger (especially more frequent blowing in spring and summer to prevent interference with heat dissipation), cleaning of the discharge port, and regular (generally 12 months) replacement of 3 filters (models: 3-level filter XF3―44, 7-level filter XF7―44, 9-level filter XF9―44); Selection, installation method, installation position and seasonal factors have certain influences on the oil and water removal of the refrigeration dryer.
The quality of the activated carbon and alumina within the unit is directly related to the air quality of the compressor and the performance of the deoiling and dehydration systems of the dryer. Generally, the activated carbon and alumina should be replaced every 3 to 5 years based on the usage conditions of the equipment. Maintenance and upkeep are essential for ensuring the
The carbon molecular sieve in the pressure swing adsorption nitrogen generator is the core component. Its performance indicators include: hardness, nitrogen production volume (Nm3/T-h), recovery rate (N2/Air)%, packing density, etc. During use, it is necessary to prevent overheating from affecting the adsorption effect and avoid strong airflow impact that may cause the molecular sieve to powder.
According to the user manual, the equipment should be returned to the manufacturer for testing and calibration of the instrument sensor probe every year. When abnormalities are found, they should be checked and the causes investigated.
As the storage equipment for the product, the gas storage tank should be self-inspected once a month and undergo an annual self-inspection; external technical supervision bureau non-destructive testing inspection should be conducted once every 3 years, and after 6 years, when it reaches the design service life, it should be determined whether to continue using or scrap based on the inspection results.
Maintenance and maintenance work is a necessary condition for ensuring the normal operation of the PSA nitrogen generator. As a public engineering equipment, the PSA nitrogen generator's stable operation is the condition and guarantee for the unit to carry out industrial experiments. Timely maintenance and upkeep of each unit of the equipment can prevent faults, extend the equipment's service life, and increase efficiency and reduce energy consumption. Maintenance and upkeep are necessary conditions for ensuring the normal operation of PSA nitrogen generators. As public utility equipment, the stable operation of PSA nitrogen generators is the experimental condition and guarantee for the unit to carry out industrial activities. Timely maintenance and upkeep of each unit of the equipment can prevent malfunctions, extend the service life of the equipment, and reduce energy consumption while increasing efficiency.
