共查询到20条相似文献,搜索用时 78 毫秒
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本工程为联碱装置供热凝结水回收系统设计.本装置主要生产纯碱和副产品氯化铵。本文简要介绍其蒸汽(工艺用汽)凝结水回收系统的设计,重点是回收设备的综合技术经济分析、回收方案的拟定;通过对其节水分析,阐述了全球淡水日益紧张的今天。节水对保护环境、合理利用资源是非常有利的。通过节能分析,强调了成本核算.蒸汽系统中的冷凝水回收效益是十分可观的。 相似文献
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龚孝祥 《硫磷设计与粉体工程》2014,(6)
介绍贵州瓮福蓝天氟化工股份有限公司20 kt/a无水氟化氢生产装置的工艺流程,重点介绍了该装置蒸汽冷凝水回收利用、废水回收利用、机泵设备改变频控制、低温余热回收等方面节能减排技改项目的实施运行情况及取得的经济效益和社会效益。 相似文献
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使用密闭式蒸汽冷凝水回收装置可实现节水、减少水处理费、提高锅炉出力、节煤、减轻司炉工劳动强度等综合效益。本文介绍了密闭式蒸汽冷凝水回水系统的工艺流程、工作原理及安全措施、关键部件的选择以及在橡胶行业的应用情况和取得的节能效益。 相似文献
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至10月底,巴陵石化烯烃事业部“密闭式蒸汽冷凝水回收系统改造”项目投用1年。冷凝水回收系统建立后,冷凝水的回收率可达88%,每天可回收600t左右的蒸汽冷凝水,年节水效益超过80万元。 相似文献
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简要介绍蒸汽(工艺用汽、伴热用汽)凝结水回收、处理系统的设计,重点是回收设备的综合技术经济比较,回收方案的确定、利用。节能分析、通过对冷凝水回收利用,效益十分可观。 相似文献
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冷凝水的回收利用是蒸汽供热系统的重要环节。在开放式回收系统基础上发展起来的密闭式冷凝水回收系统具有较高的节能效益。该系统闪蒸损失小,热量和冷凝水的利用充分。 相似文献
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王友华 《硫磷设计与粉体工程》2014,(6)
介绍威顿2×400 kt/a硫磺制酸装置的工艺流程,重点介绍了该装置蒸汽冷凝水回收利用、废水回收利用、机泵设备改变频控制、低温位余热回收、烟气氨法脱硫等方面节能减排技改项目的实施运行情况及取得的经济效益和社会效益。 相似文献
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陈德云 《中国石油和化工标准与质量》2023,(12):102-104
现阶段我国工业化发展迅速,各个工业企业在当前的条件下都扩大了产能,也陆续引进了各种新设备与新工艺,以形成全新的生产体系,创造更大的效益。结合工业企业的生产情况,为实现可持续发展,许多工业企业都在尝试蒸汽冷凝水回收,以科学利用冷凝水与热能,实现低碳环保目标。蒸汽冷凝水回收是一个复杂的过程,各企业需立足自身情况来配备相应的装置。基于此,本文分析了蒸汽冷凝水回收装置的工作原理及运行流程,对实际的工作具有指导价值。 相似文献
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针对汽车用塑料灯头的结构特点与工作环境,分析了灯头结构的复杂性、材料性能,注身工艺条件、合理地设计了注射成型模具,采用了组合式下模型芯来完成内孔的复杂成型,同时采用组合式侧抽芯来完成外侧面的卡钩与上面的穿线孔的成型,简化了模具的结构。 相似文献
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An equation was obtained for evaluating the thermodynamic affinity of a disperse dye for a fibre. Quantities Δh
D
and K
D
, which are functions of the composition of the dye bath, temperature, and state of the fibre material, can characterize the
change in the affinity of the dye for the fibre when the dyeing conditions are varied. 相似文献
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The choice of chromophores and of their mutual geometrical arrangement for optimized singlet fission (SF) rates are considered. The electronic matrix element that enters the Fermi golden rule for the rate of SF is worked out algebraically for a simple model, but the density of states factor is not analyzed here. The model treats only the highest occupied and lowest unoccupied orbitals of the partners. It provides an approximate formula that requires only the knowledge of the expansion coefficients of these orbitals and of overlap integrals between atomic orbitals on the partners to obtain an estimate of the electronic matrix element. An illustrative application to a pair of ethylene molecules suggests that favored geometries will be those in which one of the AOs on the first ethylene overlaps with both AOs on the second ethylene, while the other AO on the first ethylene overlaps with at least one, and preferably both, AOs of the second ethylene as little as possible. 相似文献
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A procedure was developed that examines the effectiveness of nickel catalysts for the hydrogenation of fatty nitriles to amines.
Rates of reaction, selectivity, and olefinic reduction were the parameters studied. The procedure can be used for new catalyst
screening and is ideally suited for quality assurance testing of production catalysts. It involves the reduction of nitriles
to amines at 410°F (210°C) and 500 psig using a .2% Ni loading level. A mixture of primary and secondary amines is obtained
which is characteristic of the catalyst’s selectivity. Both sponge and supported nickel catalysts were tested using tallow
nitriles as the feedstock. 相似文献
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A study of fertilization practices in intensively grown tomatoes, leading to a projection of developments in fertilizer usage is presented. Targets of optimal fertilization strategy were defined as follows: maximize fruit yield; maximize fruit quality; minimize environmental pollution with fertilizers; minimize corrosion of the fertilizer distribution system; minimize expenses on fertilizers. Information was gathered by literature searches and by personal interviews and visits to research institutes and growers.Rechecking of some fertilization practices for greenhouse tomatoes grown in detached media is proposed. The review indicates that the following should be rechecked: ammonium/nitrate ratio in fertilizer formulations; use of urea in fertilizer solutions; levels of phosphates applied; levels of sulphate applied; simple iron salts vs. chelated iron application; osmotic potential (OP), expressed as electrical conductivity (EC), of the nutrient solution at various growth stages.EC, pH and estimated prices of fertilizer solutions were calculated and presented in tables. 相似文献