High Quality China Natural Gas Purifying Plant Factories - MDEA desulphurization skid – Hengzhong

Description

MDEA desulphurization (desulfurization) skid, also called MDEA sweeting skid, is a key device in natural gas purifying or natural gas conditioning.

MDEA desulfurization skid for natural gas is always adopted when the carbon sulfur of feed gas is relatively high , and when selective removal of H2S is needed to obtain acid gas suitable for Claus plant processing, and other conditions that can be selected to remove H2S; When removing H2S and removing a considerable amount of CO2, MDEA and other alcoholamine (such as DEA) can be used as the mixed amine method;

Process

After the solid and liquid impurities are removed from the feed gas through the separator and filter separator, the feed gas is desulphurized in the float valve tower. Methyl diethanol (MDEA) solution is used as desulphurizer in the tower.

After removing a small amount of MDEA liquid foam from the gas through the wet purification separator, wet natural gas enters the dehydration tower.

TEG is used to dehydrate the wet natural gas in the tower and the dry gas from the dehydration tower is used. Natural gas is used as qualified commodity gas for export.

The MDEA rich liquid in the desulfurization tower is flash evaporated to remove hydrocarbons and filtered by filters. Then it is heated by steam to regenerate poor MDEA liquid, which is pumped to the desulfurization tower for cyclic desulfurization.

The natural gas from MDEA rich liquid flash is removed by acid-water separator, and the separated MDEA solution is pumped to the desulfurization tower. TEG rich liquid used in dehydration tower is heated to regenerate poor TEG solution through distillation column, flash tank and filter. It is pumped to the dehydration tower for cyclic dehydration.

After injecting H2S gas into the acid gas storage tank at the separation point of the acid water separator, it is preheated in the reaction furnace and reacts with the air sucked by the air compressor to form SO2, which reacts with the remaining H2S to form elemental sulfur, and then gets sulfur after cooling.

Specification

1 Medium Sour natural gas
2 Treatment capacity 121X104 Nm3/d
3 Inlet Temperature   30-36℃
4 Inlet pressure 2.05-2.25 MPa
5 Materials 20G/GB5310