A comprehensive fine dehydration process for recovering lng/lpg/ngl products from saturated water-containing petroleum associated gas
A petroleum-associated gas and associated gas technology, applied in the petroleum industry, gas fuel, fuel, etc., can solve problems such as freezing blockage of heavy hydrocarbon fractionation systems, excessive water content of heavy hydrocarbons, and liquefied gas indicators that do not meet product index requirements, etc., to achieve The effect of improving reliability
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Embodiment 1
[0044] This embodiment provides a comprehensive fine dehydration process for recovering LNG / LPG / NGL products from saturated water-containing petroleum associated gas, such as figure 1 shown, including the following steps:
[0045]Raw material associated gas pressurization and purification stage: The raw material associated gas from outside the station first enters the first gas-liquid separator 1 to remove the dirty liquid in the gas, and then enters the primary compressor 2 for pressurization, and the pressurized gas passes through the second gas After the decontamination liquid is removed by the liquid separator 3, it enters the desulfurization and decarbonization device for desulfurization and decarbonization process, and the associated gas after desulfurization enters the low-pressure dehydration skid 4 for dehydration of the first-stage molecular sieve;
[0046] LPG cold box stage:
[0047] The associated gas enters the solid desulfurization equipment 5 after the primary...
Embodiment 2
[0055] The high-pressure dehydration skid 12 is provided with the regeneration gas to the low-pressure dehydration outlet 15, and the low-pressure dehydration skid 4 is provided with the regeneration gas from the high-pressure dehydration inlet 16, and the regeneration gas is connected to the regeneration gas from the high-pressure dehydration inlet 16 to the low-pressure dehydration outlet 15.
[0056] Such as figure 2 As shown, the low-pressure dehydration skid 4 includes a low-pressure molecular dehydration adsorption tower A, a low-pressure molecular dehydration regeneration tower B, a water cooler-17 and an electric heater-18;
[0057] The outlet pipes at the top of the low-pressure molecular dehydration adsorption tower A and the low-pressure molecular dehydration regeneration tower B are divided into two paths, one path is connected to the low-pressure associated gas inlet pipe through valves A1 and B1, and the other path is connected to the water cooler-17 through valv...
Embodiment 3
[0061] Such as image 3 As shown, the high-pressure dehydration skid 12 includes a high-pressure molecular dehydration adsorption tower C, a high-pressure molecular dehydration regeneration tower D, a water cooler two 23 and an electric heater two 24;
[0062] The outlet pipes at the top of the high-pressure molecular dehydration adsorption tower C and the high-pressure molecular dehydration regeneration tower D are divided into two paths, one path is connected to the high-pressure associated gas inlet pipe through valves C1 and D1, and the other path is connected to the water cooler 2 through valves C2 and D2. The inlet pipe is connected; the high-pressure associated gas inlet pipe is provided with a feed gas filter two 25, and the outlet pipe of the water cooler two 23 is connected to the regenerative gas and goes to the low-pressure dehydration outlet 15;
[0063] The outlet pipes of the high-pressure molecular dehydration adsorption tower C and the low-pressure molecular d...
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