Objective The aim of this study is to explore the feasibility of phosphorus-free corrosion and scaling inhibitors in circulating water system of natural gas purification plant. Methods A phosphorus-free corrosion and scaling inhibitor was developed with polyepoxysuccinic acid and zinc salt as the main raw materials. Firstly, the water quality adaptability of the inhibitor was evaluated by means of indoor rotating coupon corrosion test, static scale inhibition test, and microscopic morphology observation, which were followed by field application in the circulating water system of a single natural gas purification plant with a capacity of 150 m3. Results The indoor evaluation results showed that the corrosion rate of carbon steel could be controlled below 0.02 mm/a and the static scale inhibition efficiency was observed to exceed 90% within the range of calcium hardness of 100-600 mg/L. The field application also confirmed that the CT4-39B has favorable effects since the corrosion rate is far lower than the control value of 0.075 mm/a. At the same time, the total phosphorus contents in circulating water calculated by phosphate radical reduced from 10 mg/L to less than 0.5 mg/L, which has a positive effect of energy conservation and emission reduction. Conclusions Both the indoor studies and field tests confirm that the phosphorus-free stable operation technology has excellent effects when facing the water with calcium hardness ranging from 100 mg/L to 600 mg/L, and can effectively support the overall environmental protection upgradation of the purification plant while ensuring the stable operation of the circulating water system.

为提高水资源利用效率,北京市自来水集团有限责任公司组织编制了《供水企业节水管理规范》(DB11T 1936-2021),明确了供水企业取水、制水、供水、用户用水及办公场所等环节的节水管理重点,并对涉及城镇供水企业和乡镇集中供水厂节水管理的基本要求和取水、制水、供水、用户及办公场所等关键要求进行了解读.

针对川西北气矿某天然气净化厂周界安防手段落后及低效问题,设计了一种基于双光谱图像的净化厂周界入侵报警系统.依靠可见光和红外两种光谱图像优势,结合深度学习目标检测算法和自定义周界区域,系统克服了单光谱图像在全天候工况下识别准确率低或漏检的问题.一方面,根据净化厂周界安防需求提出了入侵报警系统的具体方案和系统结构;另一方面,根据环境特点给出了系统的详细部署.为验证系统有效性,在净化厂周界不同地点和时间对系统进行实验验证,结果表明:给出的周界入侵系统方案能够实现对净化厂周界的全天候入侵检测与报警.净化厂周界入侵系统投入应用后,可有效降低厂区因入侵事件导致重大安全事故的风险,同时也为石油天然气行业其他场站安防建设提供了重要参考.

为了解亦庄调节池浮游动物群落结构特征,2022年对调节池一期进行群落多样性调查.结果表明,共鉴定出浮游动物4门146种,原生动物和轮虫检出种类最多,2022年8月10日首次在调节池中发现桃花水母.浮游动物密度年均值为23ind./L,从时间和空间分布来看,不同取样点的浮游动物群落结构差异较大,反映出调节池水力分布并不均匀,存在水动力缓滞区域.生物量年均值为20.80μg/L,处于贫营养水平.根据生物多样性指数法评价水体水质为清洁-轻度污染.

目的 制备一种低堆密度高强度的Claus尾气加氢水解催化剂,以解决尾气加氢水解催化剂堆密度高所造成的成本高的问题.方法 考查对氧化铝粉体和载体性能影响最大的焙烧过程,采用TG、SEM、XRD等表征手段,研究低堆密度克劳斯尾气加氢水解催化剂的制备方法,筛选出最优控制条件,提升催化剂综合性能.结果 所制备的三叶草形催化剂堆密度仅为0.50 g/cm3,载体强度达到189 N/cm,比表面积达到312 m2/g.结论 通过浸渍法制备的低堆密度催化剂显示出良好的尾气加氢水解性能,可大大降低催化剂装填成本.

管网漏损是全世界供水管网面临的一个普遍问题，我国近年来逐渐加大了管网漏损控制的力度，取得了一些效果，但目前仍存在着一些问题。针对目前管网漏损中一些常见问题，探讨了相应的应对措施，以期给供水行业的漏损控制工作提供一定的参考。

本文主要针对水泵改造安装过程中遇到的实际问题,通过实例并结合本人的实践经验介绍了一些安装方法和施工注意事项,供同行共同探讨.

为探究次氯酸钠发生器的使用成本,通过大量试验,研究了次氯酸钠发生器的产氯量与用电量和用盐量的关系,确定了次氯酸钠发生器工作的最经济指标.