气体处理

At the same time, combining with the actual condition of delivery pipeline of our country and some prevalent leak detection and location methods, this paper raised a method, which is based on wavelet analysis and negative- pressure-wave to detect and locate the leakage. Jobs in the paper are as follows:As affected by gas density, pressure, specific heat and pipe material, the velocity of negative-pressure-wave improved depending on the energy conservation. At one time, taking the affection of velocity of gas flow, the location formula was modified in some degree.When locating the leaks with location formula, the iterative approach algorithm was adopted as a new method to increase the location accuracy level of system.Multi-scale decomposition and reconstruction of wavelet transform is utilized to filter the noise of negative-pressure-wave, which was brought by leakage. With the capacity to detect the signal singularity fast and accurately, wavelet transform was used to catch the break point of pressure signal. The work improved the accuracy of At in location formula, accordingly improved the location accuracy.Wavelet is a suitable tool for signal analysis. The distinct character is that the mother-wavelet is of optional. That means choosing different mother-wavelet will get different analysis result. So we studied how to choose mother-wavelet and its scale for signal singularity detection. The method is to choose a wavelet by regularities of the wavelet and the signal.Finally, a plan, which bases on SCADA system for inspection and detection of natural gas leakage, is proposed in the article.

其中，主要进行了以下几方面的工作：针对泄漏产生的负压波在管道中的传播速度受媒介的密度、压力、比热及材质等因素的影响，而非声波在空气中传播的速度，本文利用能量守恒原理，对其进行了修正；考虑到管内气体流速对压力波速的影响，对原始的负压波定位公式进行了一定程度的改进，并在利用定位公式进行泄漏点定位时采用逐步迭代逼近算法，提高了系统的定位精度；利用小波变换的多分辨率分解和重构技术，对采集到的管道发生泄漏时产生的负压波信号进行了降噪处理；并利用小波变换技术对信号奇异点的快速、准确的识别能力，对经上述消噪后的负压波信号进行了奇异点捕捉，精确捕捉的结果提高了定位公式中上下游站点采集到的负压波奇异点的时间差△t的精度，从而进一步提高了定位的精度；考虑到小波变换是一种基波可变的信号分析工具，也就是说，不同的小波基波对信号分析的结果将有很大差别，这势必影响最终的处理结果，因此，我们又对比分析了本课题中小波基及尺度的选择问题，依据规则性系数相似性原理对母小波的选择进行了探索性研究；最后，还提出了基于SCADA的泄漏检测与定位系统的软件开发构想及系统的嵌入方案。

This topic research aim to pretreatment the flue gas, namely, in virtue of the fly ash inspissation equipment to separate one part of gas (its concentration of the dust contented national emmision standard) from the flue gas and release directly, Lower the handing capacity of the electrostatic precipitators, raise the dust efficiency, making it can attain the national standard.

环境科学、安全科学废物处理与综合利用气固悬浮流过滤浓缩技术的研究硕士聚四氟乙烯覆膜滤料；过滤阻力；数学模型； PTFE membranefilter media；filtration resistance；mathematics model；本课题研究旨在对烟气进行预处理，即借助飞灰浓缩装置将一部分气体(其含尘浓度满足国家排放标准)从烟气中分离出来并直接排放，从而降低电除尘器的处理量，提高除尘效率，使其排放能够达到国家标准。

The advantage of biological treatment technology of malodor include: highly efficiency, no secondary pollution, simple equipment, easy to operate, cheap, easy to maintenance. So the biological treatment technology has become the focus both at home and abroad in the last few years.

恶臭气体的生物处理技术具有处理效率高、无二次污染、设备简单、易操作、运转费用低廉、管理维护方便等其它传统方法不可比拟的优越性；也是近年来国内外研究的重点。

The advantage of biological treatment technology of malodor include: highly efficiency, no secondary pollution, simple equipment, easy to operate, cheap, easy to maintenance.

恶 臭气体的生物处理技术具有处理效率高、无二次污染、设备简单、易操作、运转费用低廉、管理维护方便等其它传统方法不可比拟的优越性；也是近年来国内外研究的重点。

In order to investigate the feasibility of biofiltration elimination of malodor from oil refining wastewater treatment plant,two biofilters in series packed with a mixture of compost,bark and lava,which each consisted of three segments were used in this study.

为了考察生物过滤法处理炼油污水厂恶臭气体的可行性，本试验采用两个串联的填充堆肥、树皮和火山岩混合物的三段式生物过滤反应器连续处理某炼油污水厂浮选池的恶臭废气。

1 Steel plant,and profound analysis was carried out for the capability of reducing impurity of blowing-argon,ladle reefing,middle-vessel,crystallizer,and the infection of variant deoxidation ability on the content,composition and shape of the impurity in carting blank,through gas-analysis,image-analysis and electron microscope scan.

为了解济钢一炼钢钢水纯净度的实际状况，选择两个典型钢种BC和AH32为分析对象，通过气体分析、图像分析和电子显微镜扫描分析分别对吹氩处理和LF炉精炼处理、中间包和结晶器去除夹杂物的能力及采用不同的脱氧工艺对铸坯夹杂物含量、组成及形态的影响进行了深入分析，找出了全氧和氮的变化规律、夹杂物粒度分布及主要组成，为研究如何降低夹杂物含量和改变夹杂物形态提供了技术基础。

Was used to study the storage quality and physiological changes. and to discuss the effects of spot and decay of snap bean from maturity, temperature, variety, different handle of post-harvest and air environment throughout storage period.

为试材，研究了不同处理和贮藏条件下的贮藏效果以及采后生理变化规律，对采收成熟度、贮藏温度、品种、药物处理及气体环境对油豆角锈斑及腐烂的影响进行探讨，并提出最佳的贮藏条件和贮藏期限。

The influence of gas type, treatment time, and post-treatment dyeing on the wicking and drying properties of the treated fabrics were studied.

对气体种类、处理时间及后处理染色对羊毛织物吸湿快于性能产生的影响进行了研究。

In filtering dampish gases or gases containing sticky dust, the tendency of dust adhering to the filter bag has long been a difficulty of the industry until the engineers tried to replace the regular filter bag with tectorial filter bag or filter bag processed water-repellent.

利用袋式除尘器处理含湿量大或粘性较大的含尘气体，粉尘易粘附布袋一直是令除尘界头痛难题。国外曾尝试试用覆膜滤袋和对滤材表面进行防水处理解决防结露和布袋糊袋的难题，取得了明显的效果。

The research is made with simulated industrial gas in self-made desulfurization and regenerating device aim to confirm the process condition recovering sulfur from high concentration hydrogen sulfide released in aerofloat production with tanning extract solution.

在自行组装的脱硫再生实验装置上，采用模拟的工业气体研究了栲胶溶液处理黑药生产中释放的高浓度硫化氢气体以回收硫磺的工艺条件。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。