我国天然气管道核心装备国产化进程及应用展望

The core pipeline equipment localization process and application prospects in China

要提高中国天然气管道建设运营效益,实现管道压缩机组和大口径阀门等关键设备的国产化是基础。为此,中国石油天然气股份有限公司联合国内相关企业,建立了国产化技术研发体系和新产品分级试验体系,并成功开发了20MW级电驱压缩机组、30MW级燃驱压缩机组和高压大口径全焊接球阀:1电驱机组研制围绕三大主体单元组织实施,研发的25MVA单元串联多电平结构变频调速装置在国际同类产品中容量最大,研发的4 800r/min超高速防爆电机功率达22MW,研发的PCL800型离心压缩机工作点效率高、流量调节范围宽;2燃驱机组研制分两步走,围绕进口GT25000燃气轮机开发辅助配套系统和电控系统,配套国产压缩机形成产品一,同时开展燃气轮机自主研发,替换进口燃气轮机,形成产品二;3围绕焊接和密封两项技术难点开展攻关,开发的40英寸Class600、48英寸Class600和48英寸Class900三种规格两站安装方式的高压大口径全焊接球阀已全面替代进口产品。结论认为,压缩机组和阀门的成功国产化带动了装备制造行业、天然气行业产业链的良性发展,对于推动企业自主创新、提升企业核心竞争力、促进产业转型升级等方面都具有重大意义和作用。

To improve the economic efficiency of natural gas pipelines, we must realize the localization of core equipments such as a compressor set and a large diameter welded ball valve. For this purpose, PetroChina in alliance with other related enterprises established an equipment-localization R ＆ D system and a new product testing system and successfully developed a 20-MW class motordriven compressor unit, a 30-MW class gas turbine-driven compressor unit, and a high-pressure and large-diameter welded ball valve. First, the motor-driven compressor R ＆ D focused on three main units. The developed frequency control device structure is the cascaded multilevel with a capacity of 25 MVA. The developed anti-explosion dynamo with a motor speed of 4800 rpm can produce the power of 22 MW. The developed compressor is PCL800 with features of a high efficiency and a wide flow operating point adjustment range. Second, there were two steps of the R ＆ D of a GT-driven compressor unit （product A ＋ product B） ： we focused on the imported GT25000 gas turbine and integrated its especially auxiliary supporting systems and control systems with China-made compressors to develop the product A; simultaneously, we also carried out the R ＆ D of the product B of a gas turbine which would replace the imported one. Third, aiming to solve the problems of sealing and welding, we developed the high-pressure and large-diameter all-welded ball valves in full replace of the same kind of imported products with three different sizes.. NPS40 Class600, NPS48 Class600, and NPS48 Class900.