Description:
TEG dehydration skid is a key device in natural gas purifying or
natural gas treatment. TEG dehydration skid of feed gas is wet
natural gas purification, and the unit capacity is 2.5~50×104 . The elasticity of operation is 50-100% and the annual production
time is 8000 hours.
The TEG dehydration skid adopts about 99.74% (wt) triethylene
glycol (TEG dehydrating agent, removing the most saturated water in
wet natural gas purification, purification by TEG absorber after
dehydration dry gas (in the factory water dew point pressure
condition <-5 ℃) as a commodity to outside gas pipeline.
Flow chart
After water absorption, TEG is regenerated by the method of
atmospheric pressure fire tube heating and regeneration. After heat
exchange, the heat-depleted liquid is cooled and returned to the
TEG absorption tower after pressurization for recycling.
The gas-forming components produced by the regeneration of the rich
liquid are mainly water vapor and contain a small amount of
hydrocarbons and gases.
In order to eliminate potential safety hazards and avoid direct
emissions of environmental pollution, the recycled waste gas from
the sulfur recovery device is discharged into the atmosphere after
burning in the exhaust gas burning furnace.
Features:
1. TEG dehydration process is simple, mature technology, compared
with other dehydration method can obtain a larger dew point drop.
Good thermal stability. It is easy to regenerate and has the
advantages of small loss, low investment and operation cost.
2. A lean/rich liquid heat exchanger is installed before the lean
liquid circulating pump, which not only improves the operating
conditions of the circulating pump, but also increases the
temperature of TEG rich liquid into the triethylene glycol
regenerator, effectively recovering part of the heat and reducing
the consumption of fuel gas for regeneration.
3. Set a filter on the rich liquid channel to remove the mechanical
impurities and degradation products carried in the solution system,
keep the solution clean and prevent the solution from foaming,
which can reduce the loss of the solvent and is conducive to the
long-term stable operation of the device.The direct fire tube
heating method adopted in TEG regeneration is mature, reliable and
easy to operate.
Technical parameters
Inlet gas condition |
1 | Flow | 50X104 Nm3/d |
2 | Inlet Pressure | 4.86-6.15 MPa |
3 | Inlet Temperature | -48.98℃ |
Outlet gas condition |
4 | Flow | 284.4X104 Nm3/d |
5 | Outlet pressure | 4.7-5.99 MPa |
6 | Outlet temperature | -50.29℃ |
7 | H2S | ≤20g/m3 |
8 | CO2 | ≤3% |
9 | Water dew point | <-5℃ |