Nitrogen generator in the chemical industryThe core of purity control is to ensure stable nitrogen purity that meets process requirements through three stages: source control, process monitoring, and backend assurance, in order to avoid product quality problems or safety risks caused by substandard purity.

1、 Source control: guarantee of raw gas and core components

This is the basis for achieving purity standards, reducing the introduction of impurities from the source.

1. The preprocessing system must be efficient to ensure that the compressed air entering the nitrogen generator has an oil content of ≤ 0.001ppm and a dew point of ≤ -40 ℃, avoiding oil and moisture pollution of the adsorbent.

2. Core adsorbents (such as carbon molecular sieves) need to be regularly inspected. If pulverization or a decrease in adsorption efficiency occurs, they should be replaced in a timely manner to prevent their inability to effectively separate oxygen.

2、 Process monitoring: real-time monitoring and parameter adjustment

By dynamically monitoring and adjusting, purity fluctuations can be avoided during operation.

1. Install an online nitrogen purity analyzer and set the upper and lower limit alarm values (such as 99.99% commonly used in chemical industry as the qualified line). Once it falls below the standard, the alarm will be triggered immediately.

2. Stabilize the operating parameters of the nitrogen generator, including intake pressure (usually 0.6-0.8MPa), adsorption time, and regeneration time, to avoid sudden changes in parameters that may lead to a decrease in separation efficiency.

3、 Backend guarantee: Pollution prevention in storage and transportation processes

Nitrogen with standard purity needs to remain stable in subsequent stages.

1. Nitrogen storage tanks need to be regularly cleaned and dried to prevent inner wall corrosion or residual moisture from entering the nitrogen gas.

2. The conveying pipeline is made of stainless steel material to reduce the secondary pollution of nitrogen gas on the inner wall of the pipeline and avoid air infiltration caused by pipeline leakage.