162- Discussion on the design scheme for the vane separator at the compressor inlet of China-Russia natural gas stations
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This post was last edited by luoli519 on 2024-4-7 at 11:00. It discusses and analyzes the design approach for using vane separation technology in the inlet separators of natural gas compressors at the natural gas plants involved in the Sino-Russian natural gas project.
The population separator used in natural gas compression units is a type of separator that requires high technical standards. This post takes the design scheme using vane separation technology for the compressor inlet separator in the Sino-Russian gas project that was once undertaken as an example for analysis and discussion, to illustrate the similarities and differences between it and conventional compressor inlet separator design schemes.
This post was last edited by luoli519 on 2020-9-22 at 11:48. The Sino-Russian gas project cited as an example here involves Gazprom, the Russian oil company, which extracts 42 billion m3/year of raw gas from gas fields in the Yakutia and Irkutsk regions (Eastern Siberia). This raw gas is transported via pipelines to newly built processing facilities, where it is processed; the resulting 38 billion m3/year of commercial natural gas is then sent to China through the Sino-Russian Gas Pipeline (East Route). Project Hongda. Please refer to the area map for the following items:
The project is divided into 3 bid packages; Package 1, which involves complete patent technologies, has been awarded to the German company Linder. Bid Section 2 is a section involving proprietary technologies; the contractor is CPECC, while the design agencies are CPECC’s Southwest Institute and the British company FLUOR. Package 3 mainly involves utility works, including the camp, central control room, maintenance workshop, and condensate tank farm, among others.
At the request of the contractor for Section 2, Nuowei Energy Technology Company designed and manufactured the compressor inlet separators for the Russian AMUR gas processing plant project using its patented vane separation technology, in accordance with the ASME standard system. A total of 4 sets of compressor inlet separators in 2 series were produced, all with identical operating conditions and processing capacities.
This post was last edited by luoli519 on 2020-9-22 at 12:04. The owner and contractor of the AMUR natural gas processing plant have provided me with the composition of the natural gas involved in that gas compressor inlet separator: mol% Nitrogen, 1.7991； CO2, 0.3143 ； Methane, 92.7464 ； Ethane, 5.0004 ； Propane, 0.0912 ； Methanol, 40.0786 ppm(mol) ； H2O, 0.0046ppm(mol). As can be seen from its composition, a certain amount of methanol is injected into the raw material gas pipeline to prevent water from freezing.
The operating conditions of the inlet separator for the natural gas compressor as obtained by our side are as follows: Temperature, °C: 33； Pressure, MPag: 1.78 ； Std Gas Flow, Sm3/hr: 480000 ； Mass Density (@P&T), kg/m3: 13.1517 ； Gas Viscosity(@P&T), cP: 0.0119. For other unspecified parameters, the owner and the contractor require Nuoyi Energy Technology Company to use its specialized precise dynamics separation technology as well as the system platform for calculation and configuration design in order to refine and supplement them before proceeding with the technical solution design.
The design requirements for the compressor inlet separator as specified by the owner and contractor to our team are as follows: Separation internals type: Novel Feather Vanes; Particle concentration, less than, mg/m3: 1; Removal of solid particles of 10 microns and larger, %: 100; Liquid carried over from the outlet gas, less than, mg/m3: 5; Saturation state without dripping moisture, short-term: 5; Maximum allowable pressure drop, kPa: not more than 6. Note: Under normal operating conditions, the moisture content in the gas supplied to the apparatus does not exceed the values corresponding to the saturation state. Under non-standard conditions, gas with a concentration of dripping liquid of up to 100 mg/m3 can still be accepted.
Furthermore, the owner and the contractor have also requested that we carry out the design in accordance with the following requirements regarding the vertical structure and the positioning of the pipe openings. It is presumed that the owner and the design institute have already coordinated the integration of all pipelines and facilities other than the separators, in order to avoid conflicts during installation and the layout of piping and instrumentation, which could affect the project schedule.
This post was last edited by luoli519 on 2020-9-22 at 12:30. Diagram 1: Vertical structure of the separator and layout of pipe openings
Diagram 2: Vertical structure of the separator and layout of pipe openings