3种填埋气收集井运用特点的论述

阐述了目前国内常用的3种填埋气收集井即竖直收集井、水平收集井、膜下收集井的工艺,分析了这3种填埋气收集井的特点及适用范围,探讨了填埋场选择填埋气收集方法时,需要考虑的技术、经济、环保和资源利用等方面的因素。

井液反向流分离收集防砂装置

研制的井液反向流分离收集防砂装置由本体、中心管、筛管、异形接头和油管接箍等组成。装置通过改变油井井筒内液体的流向，分离出油井井筒内大的砂粒和岩屑，使其下沉到口袋管柱内，待修井作业时取出；井筒内液体和细小砂子通过筛管进入抽油泵内举升到地面。这种装置在胜利油田１０个采油厂１００口井的现场应用表明，油井总产液量略有增加，油井平均检修作业周期延长８０～１００ｄ；有效地减轻了抽油泵阀和衬套的磨损，提高了泵效，普遍见到好效果，达到了预期目的。

室外污水负压抽吸技术在水乡城镇的应用

针对水乡城镇建筑密集、街道狭窄、建筑抗工程扰动性差、地形相对平坦等特点,研发了新型室外污水负压抽吸技术。介绍了该技术的工作原理、技术特点、设计参数、运行模式、工程验收、注意事项和工程效益。实际运行结果表明,该技术设备简单、管道管径小、无坡度限制、运行管理简便、投资运行费用低,可有效解决水乡城镇污水收集困难的问题,对改善当地水环境具有重要意义。

Solid phase microextraction(SPME) sampling under turbulent conditions and for the simultaneous collecting of tracer gases

Solid phase microextraction （SPME） is a solvent-flee method of sample collection. SPME is an appealing method for sample collection because it is designed for the sampling of trace level analytes with short sampling times in a variety of environments. Additionally, SPME can be used to directly deliver a sample to a gas chromatograph （GC） for analysis by means of thermal desorption. In this paper, the performance of SPME under dynamic conditions was investigated. Additionally, the competence of SPME sampling for the simultaneous analysis of multiple trace analytes was also evaluated. This work is discussed in the context of underground mine ventilation surveys but is applicable to any industry in which ventilation circuits must be evaluated. The results of this paper showed that the performance of the 100 ~m PDMS SPME fiber was both precise and rapid under dynamic conditions. This SPME fiber was also able to simultaneously collect sulfur hexafluoride （SF6） and perfluoromethylcyclohexane （PMCH） with adequate sensitivity.

卫生填埋场穿坝管处防渗系统渗漏检测及修复案例

通过对设计资料进行分析及现场研判,结合现场试验措施,准确定位生活垃圾卫生填埋场堆体内部渗滤液渗漏事故点位置,通过定点导向开挖垃圾堆体露出渗漏点后,采取封堵渗滤液导排管道、设置斜管收集泵井提升填埋场内部蓄积渗滤液的组合方案进行了渗漏事故点的修复。修复措施完成后的监测结果表明,填埋场正常稳定运行,采取的工程措施达到了预期目的。