Light hydrocarbon recovery refers to the recovery of components heavier than methane or ethane, which are separated in the form of condensate. The light hydrocarbon recovery device adopts mature and reliable process technology, which is mainly used for oil field associated gas and heavy hydrocarbon content. For higher natural gas, the C2-C6 + components are recycled.
On the one hand, in order to control the hydrocarbon dew point of natural gas to achieve the commercial gas quality index, avoid gas-liquid two-phase flow; on the other hand, the recovered liquid hydrocarbon has great economic value and can be directly used as a fuel or further separated into ethane, Propane, butane or propane mixture (liquefied gas), light oil, etc., can also be used as chemical raw materials.
Light hydrocarbon recovery unit system
1. Dehydration separation system: This system is a natural gas passing through a separation device, through low-speed, rotary separation, metal filter screen and other processes, so that water, heavy oil, sediment, etc. are fully separated, greatly reducing the load and cumbersome maintenance of the downstream process system The remarkable feature of the system is the addition of a rotary separation and wire mesh filtering device, and the separation effect is significantly increased.
2. Compression purification system: The compression system adopts oil-free compressor, and the evaporative condenser has the characteristics of low energy consumption and convenient maintenance.
3. Drying system: This system adopts 4A molecular sieve, gas heating and reduction, automatic exchange and other characteristics, energy saving effect is good, and the labor intensity of operators is reduced.
4. Refrigeration separation system: According to different feed gas pressure, composition and recovered products, propane refrigeration cycle, expander refrigeration cycle, methane/light hydrocarbon refrigerant cycle, etc. All can be selected to achieve separation and recovery of light hydrocarbon products such as ethane and propane.