After decades of development in China’s oil and natural gas industry, through the efforts of several generations of scientific and technological personnel, they have mastered the core technologies in natural gas gathering and transportation, forming a series of engineering construction technologies ranging from gas field development, purification, storage and transportation, etc. Advantages, accumulated rich experience in natural gas field gathering and transportation engineering technology, natural gas purification technology, natural gas light hydrocarbon recovery technology, sulfur-containing oil and gas field anti-corrosion technology, etc., and provide strong technical support as soon as possible to integrate with international standards. Only China National Petroleum Group Engineering Design Co., Ltd. The Southwest Branch (formerly Sichuan Petroleum Exploration and Design Institute), for example, has achieved gratifying results in gas field gathering, transportation and natural gas processing, and has completed many engineering projects such as the Jingbian Natural Gas Purification Plant and the new oil and gas processing plant in Kazakhstan's Zhananol.
Gas field gathering and transportation technology
Gas field internal gathering and transportation technology single well gas gathering and multi-well gas gathering; separation technology normal temperature separation and low temperature separation; gas field boosting equipment uses reciprocating compressors, centrifugal Type compressors, gas engines and gas turbines; anti-corrosion coatings are the main anti-corrosion technology in gas field gathering and transportation systems. Metal materials that resist sulfide stress corrosion cracking and inhibit CO2 corrosion are selected and corrosion inhibitors are added.
Natural gas purification technology
In terms of natural gas processing, natural gas purification plays an important role due to the environmental protection requirements for pipeline gas quality standards. The natural gas purification process started from the industrialization of amine desulfurization and modified Claus process sulfur recovery in the 1930s. For decades, various countries have been committed to the development and improvement of natural gas purification processes. Especially in the 1960s, it was stimulated by the energy crisis. The development, on desulfurization, dehydration, sulfur recovery and tail gas treatment, homogeneous matching, provides the basis for the optimization selection of numerous desulfurization (decarbonization) methods under various conditions.
Although there are many methods for natural gas desulfurization (decarbonization), dehydration, sulfur recovery and tail gas treatment, the typical process method (that is, the dominant one) is the amine desulfurization--triethylene glycol dehydration--g Rolls process sulfur production - low-temperature Claus process or reduction absorption process tail gas treatment, this process has wide adaptability and good technical and economic indicators. The other various methods are only suitable for use under certain specific conditions.
The application of membrane separation technology in natural gas purification has been relatively mature abroad, and has also been explored in China. The main problem is that the performance of domestic membrane materials is still ideal, and there is a lack of experience in the production of membrane reactors.
Although the application of pressure swing adsorption technology to natural gas purification has not yet been industrialized, the experimental results are encouraging. Therefore, the process can maintain high desulfurization selectivity and ensure purification under conditions with a very high carbon-sulfur ratio. The degree is the same. Only by selecting the appropriate adsorbent, this process can also be applied to natural gas denitrification and carbon dioxide removal to recover sulfur dioxide from tail gas.