Many pipeline drying methods, mainly include the desiccant method, dry air drying, vacuum drying, dry nitrogen replacement method, etc.

 

The vacuum drying method and dry nitrogen replacement method in widely applied at home and abroad, including vacuum drying method commonly used in combination with dry air drying method. The United States and Canada regulations of dry gas transmission pipeline standards for water dew point below - 40 ℃. Additional nitrogen water dew point lower (less than 70 ℃), by using dry to dry nitrogen replacement pipeline.

Dry nitrogen replacement method

With kenley 3-2 oilfield of dongying oil terminal log in pipeline of nitrogen inerting project as an example to introduce dry nitrogen replacement

 

Pipeline drying requirements and indicators

Dry to dew point in below 40 ℃ is qualified. Every outlet in the 0.5 h testing an export air dew point, when three consecutive measurement of dew point is below 40 ℃ - namely that dry qualified.

Using the dew-point meter is used to detect the dew point

 

Smaller power vacuum drying equipment, total power of 240 kw unit vacuum drying equipment, mobile equipment is simple, high efficiency, through field measurement, the drying speed of 1000 kw

Air compressor dry air drying speed. In the process of vacuum drying, if in blind import a small amount of dry air, can accelerate the drying schedule, therefore recommended by vacuum drying and dry air auxiliary drying method. But the dry air auxiliary drying with pipeline dry air drying equipment vary widely, auxiliary dry air compressor by ordinary air compressor with 10 m after can, equipped with corresponding dry air drying equipment.