Influence of upgrading natural gas quality standard on purification plant

GB17820-2018 has been formally implemented, which puts forward higher requirements for the quality index of natural gas entering the long-distance pipeline network. It is required that the H 2 S in the first type of natural gas should be less than 6mg/m 3 and the total sulfur should be less than 20mg/m 3 . Because of the high content of organic sulfur in feed gas, MDEA desulfurization can not meet the standard requirements in some purification plants. At present, sulfolamine solvent desulfurization, COS hydrolysis process and molecular sieve desulfurization process are often used to remove organic sulfur. The purification plant can meet the requirements of GB 17820-2018 through solvent upgrading and new process technology. However, each of the three technologies has its own advantages and disadvantages, which should be reasonably selected according to the feed gas situation of the purification plant.