摘要
循环冷却水在LNG工厂生产中占有很重的分量,而腐蚀是循环冷却水系统中常见的水质故障,严重影响生产中设备的运行。针对LNG厂循环冷却水系统清洗预膜后冷态运行期间循环水总铁、浊度等指标超标的问题,对某厂循环水系统概况及系统装置前期运行情况作了阐述,对出现的问题进行多方面分析。将理论与实践相结合调整了循环水系统冷态运行方案:调整循环水水质与水处理剂的有效成分,研制出适合循环水低硬度与低碱度条件下的阻垢缓蚀剂GX-102和防锈剂GX-301。调整后循环水水质达到控制要求且排污量大大降低。
For most LNG plants, the effect of recirculating cooling water is important in a proper operation. However, as a common water quality trouble, corrosion may severely affect a normal equipment running. After cleaning and prefilming or during cold running,some indexes of both total iron and turbidity of recirculating water often exceed the allowed figures. So, taking the recirculating water system in one LNG plant as an example, we summed up the basic function of system and the situation at the onset of facility running,and analyzed existing problems. After our study, a scheme of cooling running has been developed to adjust the water quality of recirculating water and the effective component of water treatment agent. In addition, the scale and corrosion inhibitors of GX-102 and the antirust agent of GX-301 have also been developed for lowhardness and low-alkalinity recirculating water. For this adjusted recirculating water, the water quality meets the controllable demand and the sewage discharge decreases a lot.
出处
《天然气技术与经济》
2017年第4期43-46,共4页
Natural Gas Technology and Economy
关键词
LNG工厂
循环冷却水
腐蚀
水处理剂
阻垢缓蚀剂
LNG plant
recirculating cooling water
corrosion
water treatment agent
scale and corrosion inhibitors
