Case of DEAR air separation and Jiujiang Branch of Sinopec

KDN-2000 air separation plant signed by DEAR air separation and Jiujiang Petrochemical Co., Ltd has the process characteristics: single-stage distillation and high-purity nitrogen.

The unit adopts molecular sieve purification, booster turbine expander to supply the cooling capacity of the unit. At the same time, it adopts nitrogen production process with double towers and double condensations. The extraction rate of nitrogen was about 70%.

1.Good safety

The whole set of device has the advantages of low operating pressure, simple process, high equipment safety, long switching cycle of molecular sieve system, increased service life of switching valve, and reduced potential hazards.

2.High reliability

Water chillers are used to reduce the failure of moving equipment.

3.Convenient operation and maintenanceandsimple process

Note:

The unit of measurement Nm³/h is measured at 0 ℃, 0.1013Mpa (A). It is called standard state quantity.

1.1 Take oxygen and nitrogen at different times

1.2 Operation cycle (interval between two large heating): ≥ two years

1.3 Heating and uncooling time of the device: ~ 24 hours

1.4 Starting time of the device (from the start of expander to the purity of oxygen product): ~ 20 hours