喷射浮选处理含油污水的研究

重点对喷射浮选处理含油污水进行了试验研究，结果表明浮选室内射流泵的没水深度对喷射选除油效果有较大的影响，并且只有在气泡量大并充满浮选室及表面相对平静的状态下，才儿得较好效果，为此，我们在浮选室内加入自制的增料，使兼并的气海重新得到分散，消耗了一部分动能，减缓了浮选室的扰动，使除在大提高，从而为研制新型高效的喷射浮选设备提供了一条新途径。     

喷雾吸收法处理烟气中S02的试验

在内径300mm的塔内,采用旋涡式压力喷嘴作雾化器,以石灰作为吸收剂进行烟气脱硫模拟试验研究。试验考察了吸收液PH值、吸收浆液浓度、循环浆液停留时间、液气比、空塔气速及进气SOZ浓度等对脱硫率的影响。结果表明:单级喷雾可获得39％以上的脱硫率,整个试验过程中,喷嘴引起的塔压降很小。此外,还观察了脱硫过程中吸收塔内的结垢情况。通过烟气脱硫模拟试验,为进一步利用喷雾法对国内现有中小型锅炉麻石水膜除尘器的改造,提供了必要的基础数据。     

Effect of day time climatic conditions associated with different 2,4-D formulations on spray deposition and weed control

Abstract

The aim of this study was to evaluate the effect of time of the day and their associated climatic conditions on spray deposition of two 2,4-D formulations, as well as the influence on weed control. The experiment was installed in the field in complete randomized design. Treatments were arranged in factorial design 8?×?2, with 20 repetitions. First factor corresponded to different application time (1:00, 4:00, 7:00, 10:00, 13:00, 16:00, 19:00, and 22:00) with their respective climatic conditions. The second factor consisted of two formulations of 2,4-D applied at 776?g a.e. ha^?1 (2,4-D amine and 2,4-D choline salt with Colex-D? Technology) + glyphosate (816?g a.e. ha^?1). There was more spray deposition when 2,4-D choline formulation was used, and such differences were more evident for applications performed under adverse climatic conditions. More spray deposition was found in applications performed at times of day with more favorable temperature and humidity of the air conditions. Only the initial control of the evaluated species was affected by the time of application.     

低氟聚氨酯泡沫塑料在冷库保温上的应用

聚氨酯(以下简称PU)泡沫塑料喷涂发泡采取低氯氟烃(以下简称低氟)发泡配方与工艺，即配方中降低CFC发泡剂50％--60％的用量，以水代替其发泡。试验结果表明，用本配方及工艺实施的泡沫保温层各种性能良好，保持了传统单纯采用氯氟烃发泡剂的聚氨酯泡沫的优异性能，施工工艺简单、可靠，对环境友好。     

大空间仓库堆垛特性对水炮雾状射流灭火性能影响的实验研究

大空间堆垛储物仓库的消防安全日益引起重视,自动消防炮灭火系统已广泛应用其中。堆垛物遮挡和柱状射流特性对水炮灭火有影响,雾状射流由于覆盖区域增大可提高灭火效率,堆垛特性可能会影响雾状射流灭火效果,目前缺乏相关研究。通过预喷水、布水和灭火实验研究大空间仓库堆垛特性对水炮雾状射流喷水强度分布和灭火性能的影响。结果表明:该文所研究自动消防炮(安装高度8m,雾化角度90°)在5m至15m射程间,能够有效扑灭或控制大空间仓库火灾;喷水强度和有效保护面积随射程的增大而减小,仓库危险级Ⅰ级和Ⅱ级储物高度为3.0m-3.5m时有效保护面积在5m射程处分别为27.5m2和25.5m2;堆垛高度一定时存在最小堆垛间距,小于此值时火灾将不能被扑灭或控制。     

湿法烟气脱硫喷淋塔的阻力特性研究

以装配有自行设计的湍流装置的冷态喷淋塔为研究对象,考察了气速、喷淋量、液气比(L/G)、湍流装置垂直和水平间距对其阻力特性的影响。结果表明,当湍流装置结构形式一定时,喷淋塔的湍流层阻力(ΔP)均随气速、喷淋量和L/G的增大而增大;当气速、喷淋量、L/G一定时,湍流层阻力均随湍流装置垂直与水平间距的增大而减小。当气速、喷淋量、L/G、湍流装置垂直与水平间距分别为2.0 m/s、100 m~3/h、10 L/m~3、120 mm、120 mm时,湍流层的最小阻力为0.14 kP a;而当气速、喷淋量、L/G、湍流装置垂直与水平间距分别为3.6 m/s、240 m~3/h、25 L/m~3、90 mm、100 mm时,湍流层的最大阻力为0.62 kP a。对实验数据进行多元线性回归分析,得出该喷淋塔湍流层阻力的经验公式为ΔP=0.000 46V ~(0.724)Q~(0.930)D~(-1.860)f~(-5.480),其拟合优度与显著性良好,对工业应用具有一定的理论指导意义和实际参考价值。     

特殊阻力与喷枪喷头结构合理设计

喷枪喷头的结构设计和加工质量可大幅度地影响射流质量和喷射效果。本文重点论述了合理结构设计对减少特殊阻力、提高喷头效率的影响。同时提出了减少特殊阻力的具体措施。这对提高射流的打击效果和工作效率大有稗益。     

Effects of nozzle types and 2,4-D formulations on spray deposition

The objective of this study was to evaluate the effects of nozzle types and 2,4-D formulations on spray deposition on different targets. Two field experiments were carried out in a completely randomized design, and treatments were arranged in a factorial scheme. Species in experiment 1 were Sumatran fleabane (Conyza sumatrensis) and Brazil pusley (Richardia brasiliensis) and in experiment 2 were soybeans (Glycine max) and Benghal dayflower (Commelina benghalensis). For both experiments, the first factor corresponded to spray nozzles with different settings (AD 110.015 – 61 and 105 L ha^?1; AD 015-D – 75 and 146 L ha^?1; XR 110.0202 – 200 L ha^?1; and ADIA-D 110.02 – 208 L ha^?1) and the second factor consisted of two formulations of 2,4-D (amine and choline). The formulation of 2,4-D choline has contained Colex-D? Technology. Similar or higher spray deposition was observed on the leaves and artificial targets when using 2,4-D choline as compared to the 2,4-D amine formulation, and these differences in deposition were more evident for nozzles applying lower spray volumes. Deposition was more affected by nozzle type when amine formulation was used, compared to choline formulation.     

小型锅炉烟气喷雾分离法脱硫的试验研究

以4t燃煤锅炉为对象，重点研究了喷雾分离法脱硫技术的工艺流程和主要设备，并给出了相应的试验结果。结果表明以清水为吸收剂，液气比≤0．1L／m^3，脱硫效率达到了60％—70％。本装置具有工艺简单、占地省、投资少、运行费用低的优点，特别适合用于中小型锅炉的改造。