SY/T 7780-2024 Specification for design of helium extraction from natural gas English, Anglais, Englisch, Inglés, えいご
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ICS
E
Professional standard of the People's Republic of China
SY/T 7780-2024
Specification for design of helium extraction from natural gas
天然气提氦设计规范
(English Translation)
Issue date: 2024-09-24 Implementation date: 2025-03-24
Issued by National Development and Reform Commission, P.R.C
Contents
1 General provisions
2 Terms
3 Basic requirements
General layout
5Process plants
5.1 General requirements
5.2Crude helium extraction by membrane separatior
5.3Crude helium extraction by cryogenic technolog
5.4Crude helium purification
5.5Helium liquefaction
5.6Helium storage
6 Instrumental and automatic control system
6.1 General requirements
6.2Computer control system
6.3Instrumentation and control system
7 Utilities
7.1 Water supply and drainage and fire fighting
7.2Electricity
7.3HVAC
8 Equipment and pipeline
8.1 Static equipment
8.2Pump and compressor
8.3Pipe material
8.4Equipment and pipe arrangement
8.5Corrosion and thermal isolation
Appendix A Calculation of slurry equipment selection and layout.
Appendix B Construction record table of direct pipe crossing
Explanation of wording in this code..
Specification for design of helium extraction from natural gas
1 General Provisions
1.0.1 This code is formulated to unify the technical requirements for the design of helium extraction from natural gas engineering, aiming to achieve advanced technology, safety and reliability, energy conservation and environmental protection, as well as economic rationality.
1.0.2 This code is applicable to the design of new, expanded, or retrofitted helium extraction from natural gas engineering projects.
1.0.3 In addition to complying with this code, the design of helium extraction from natural gas engineering shall also comply with the requirements of current relevant national standards and specifications.
2 Terms
2.0.1
helium extraction from natural gas
The process of extracting helium gas from helium-containing natural gas or liquefied natural gas flash vapor to produce crude helium, industrial helium, pure helium, high-purity helium, or ultra-pure helium, including process steps such as pretreatment, crude helium extraction, crude helium purification, helium liquefaction, and helium storage and transportation.
2.0.2
permeable gas
The low-pressure gas enriched on the permeate side after passing through a membrane separation unit.
2.0.3
impermeable gas
The high-pressure gas retained on the non-permeate side after passing through a membrane separation unit.
2.0.4
crude helium
Gas obtained after enrichment where the helium content is lower than the specifications for product helium.
2.0.5
crude helium extraction
The process of extracting crude helium gas from helium-containing natural gas or liquefied natural gas flash vapor.
2.0.6
crude helium purification
The process of removing impurities such as hydrogen, carbon dioxide, nitrogen, methane, oxygen, etc., from crude helium gas according to the requirements of helium product standards to obtain the helium product.
3 Basic Requirements
3.0.1 The helium extraction from natural gas process shall be determined through technical and economic comparison and selection based on the overall layout, processing capacity, feed gas composition, helium content, product type, product quality, and helium recovery rate.
3.0.2 Helium extraction from natural gas should preferably be constructed together with natural gas processing facilities.
3.0.3 When multiple helium extraction projects are constructed within the same region, the overall layout scheme for crude helium purification and helium liquefaction shall be determined through technical and economic comparison and selection.
3.0.4 Helium product specifications shall be determined based on market demand and shall comply with the relevant provisions of the current national standards Pure Helium, High Purity Helium and Ultra Pure Helium GB/T 4844 or Industrial Helium GB/T 28123.
3.0.5 Helium extraction from natural gas engineering should be equipped with an analytical laboratory that meets the analytical requirements for feed gas composition, process control, and helium products.
3.0.6 The design annual operating time for each process unit of helium extraction from natural gas engineering shall not be less than 8000 hours.
3.0.7 The fire hazard classification of helium extraction from natural gas units shall be determined according to the highest fire hazard category of the materials processed, stored, or transported.
3.0.8 Exhaust gases emitted from helium extraction from natural gas engineering shall comply with the relevant provisions of the current national standard Emission Standard of Air Pollutants for Onshore Oil and Natural Gas Exploitation Industry GB 39728.
3.0.9 Helium extraction from natural gas engineering should be equipped with portable helium leak detection instruments.
4 General Layout
4.0.1 The site selection for helium extraction from natural gas engineering shall comply with the following regulations:
1 It shall conform to national land policies, utilize land rationally, make full use of wasteland and inferior land, and occupy no or little cultivated land.
2 It shall meet the requirements of the general layout and facilitate future expansion.
3 It should preferably be located close to the gas source area.
4 It should preferably be located on the windward side of the annual minimum frequency wind direction for towns and residential areas, and should avoid wind pocket areas.
5 It shall have favorable engineering and hydrogeological conditions and shall avoid areas with adverse geological features such as mountain torrents, debris flows, landslides, land subsidence, wind erosion and sand burial, and neo-tectonic active faults.
6 It should preferably be located in places with convenient transportation and good support conditions for utilities such as power supply, water supply, and drainage.
7 It shall comply with the relevant provisions of the current national standard Code for Design of Natural Gas Purification Plant GB/T 51248.
4.0.2 The design return period for flood prevention shall be 25 to 50 years.
4.0.3 The general layout shall be arranged according to functional zones based on the production process flow, functions, and characteristics, combined with conditions such as topography, wind direction, and surrounding environment.
4.0.4 The classification, area layout, and general layout of helium extraction from natural gas stations shall comply with the relevant provisions of the current national standard Code for Fire Protection Design of Petroleum and Natural Gas Engineering GB 50183.
