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相关概念视频

Weir: Problem Solving01:26

Weir: Problem Solving

44
Water flow in open channels is often measured using hydraulic structures such as weirs, which allow precise calculation of discharge. In a rectangular channel, flow rates are measured using three types of weirs: rectangular sharp-crested, triangular sharp-crested, and broad-crested. The weir head is set at a fixed height above the channel bottom, simplifying calculations and enabling the relationship between depth and flow rate to be analyzed.For the rectangular sharp-crested weir, the flow...
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Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

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As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
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Waterproofing and Anti-Bacterial Admixtures in Concrete01:22

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Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
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相关实验视频

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Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production
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提高PVC生产的技术性能:基于WEP的能源和水资源评估

Rolando Manuel Guardo-Ruiz1, Linda Mychell Puello-Castellón1, Rodrigo Ortega-Toro2

  • 1Nanomaterials and Computer Aided Process Engineering Research Group (NIPAC), Chemical Engineering Department, Universidad de Cartagena, Cartagena 130015, Bolivar, Colombia.

Polymers
|June 13, 2025
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概括

这项研究将水回收整合到聚乙烯 (PVC) 生产中,大大减少了淡水和废水的使用. 优化过程提高了水效率和材料的再利用,提高了整体的可持续性.

关键词:
在PVC中,PVC是PVC.计算机辅助工艺工程 计算机辅助工艺工程直接的回收利用是直接的回收利用.负责任的生产 负责任的生产水的整合是水的整合.水能源产品分析分析

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科学领域:

  • 化学工程是化学工程的重要组成部分.
  • 环境科学 环境科学
  • 材料科学 材料科学 材料科学

背景情况:

  • 聚乙烯 (PVC) 是一种广泛使用的聚合物,但其悬浮方法耗水量很高.
  • 尽量减少淡水摄入量和废水产生对于PVC生产的竞争力至关重要.

研究的目的:

  • 在PVC生产中通过直接回收来实现水的整合.
  • 尽量减少淡水消耗和废水产生.
  • 使用水-能源-产品 (WEP) 分析来评估综合工艺的可持续性.

主要方法:

  • 使用源-水槽图来设计回收用水网络.
  • 使用专门的软件模拟了集成过程.
  • 应用水能产品 (WEP) 分析来评估性能和可持续性指标.

主要成果:

  • 实现了100%的未反应材料再利用 (VCM) 和99.8%的生产收益率.
  • 分数水消耗和废水产量比率分别增加到51.1%和55.0%,表明水效率有所提高.
  • 通过天然气和能源整合,在能源指标 (TCE,NGCI,EECI) 中表现最佳.
  • 由于水循环的能源需求,观察到高的环境可持续性指数 (ESI) 为3.59MJ/t.

结论:

  • 通过直接回收利用水的整合有效地减少了PVC生产中的淡水消耗和废水.
  • 该过程提高了材料的再利用和产量,有助于降低成本和提高水效率.
  • 虽然能源整合优化了几个指标,但ESI强调需要改善水循环系统的能源效率.