含汞设备汞污染控制技术

Mercury Pollution Control Technology of Mercury Containing Equipment

天然气中的汞不仅对设备造成污染和腐蚀,而且对人体及环境都有一定的危害。设备内的汞主要以单质汞的形式存在,颗粒大小不一,吸附渗透在设备内壁或与油污、水垢等一起黏附在内壁上。汞会对设备造成腐蚀,尤其是铝制设备。归纳并综合国内外经验和金属清洗的一般方法,提出了含汞设备的汞清除方法,包括人工喷射清洗法、蒸汽清洗法、循环化学清洗法等,根据设备类型和汞污染程度选择合适的清汞方法;提出了设备清汞的技术要求,推荐含汞环境作业时的允许接触浓度(PEL)为20μg/m^3。含汞设备在运行时应及时检测汞含量,定期清汞,以避免汞带来的危害。

Mercury pollutants in natural gas not only cause pollution and corrosion of equipment, the impact of production efficiency, but also on the human body and the environment there is a definite harm. Equipment of mercury exists mainly in the form of elemental mercury, particle size, adsorption and permeation on the inner wall of the equipment, or with the oil, furring together adhesion on the inner wall. Mercury will cause corrosion to equipment,especially for aluminum equipment.This paper summarizes the general methods of domestic and foreign experience and metal cleaning,proposed containing mercury removal methods including artificial jet cleaning method,the steam cleaning method,cyclic chemical cleaning method. According to the device type and mercury pollution degree, choose suitable mercury cleaning method, and puts forward equipment for mercury technical requirements, of containing mercury pollution control, Recommended when mercury environment homework allows contact concentration（the PEL） for 20 μg/m^3. At run time,mercury containing equipment should be timely detection and cleaning,in order to avoid the harm from mercury.