Development of an iron-ochre clogging-resistant filter complying to the European Market Requirements

开发符合欧洲市场要求的铁赭石防堵塞过滤器

• 批准号: 537298-2018
• 负责人: Boily, Sabin
• 金额: $ 5.46万
• 依托单位: Cégep de Saint-Hyacinthe
• 依托单位国家: 加拿大
• 项目类别: Applied Research and Development Grants - Level 2
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=720684
• 关键词: Development; iron; ochre; clogging; resistant

Subsurface drainage essentially consists in lowering the water table in a soil mass. This function is critical to protect man-made structures such as buildings against moisture-generated mold; to prevent losses of bearing capacity of roadways; as well as to remove excess moisture from the soil profile in agriculture, providing suitable conditions for crop production. Subsurface drainage pipes must remain open for water to flow. Beside the hydraulic capacity of the pipe, the design and maintenance of such structures focuses mainly on maintaining soil particles out of the core with the help of a filter, and avoiding clogging by roots or iron ochre. Achieving the filtration function is typically done using a geotextile filter in North America, and in particular knitted geotextiles. However, a different technology is used in Europe: instead of tubular knits, European pipes used in subsurface drainage applications are typically wrapped in a thick bundle of fibres, held together by a very open mesh.Replacing the fiber bundle currently used in Europe as a pipe-wrap by a knitted geotextile is a cost-effective solution. However, adoption of this technology is restrained by different issues, including a very conservative business environment reinforced by the fear that the knitted geotextile is more sensitive to iron-ochre clogging than a bundle of fibers. To introduce knitted geotextiles on the European Market, the product must meet specific needs, which are not relevant on the markets currently served by the industrial partner. First, the product must be defined according to European standards and considering European concerns, in particular with respect to the determination of the characteristic opening size. Second, the product should offer an enhanced resistance to iron-ochre formation.

地下引流基本上是降低土壤质量中的地下水位。此功能对于保护人造结构（例如建筑物免受水分生成的模具）至关重要。防止道路轴承能力损失；以及从农业中的土壤剖面中清除多余的水分，为作物生产提供了合适的条件。地下排水管必须保持开放状态才能流动。除了管道的液压容量之外，此类结构的设计和维护主要集中在借助过滤器的帮助下将土壤颗粒从核心中保持出芯，并避免被根或铁Ocher堵塞。达到过滤功能通常是使用北美（尤其是针织土工布）的土工布过滤器来完成的。但是，在欧洲使用了另一种技术：在地下排水应用中使用的欧洲管道通常包裹在厚的纤维中，而不是管状的纤维包裹，由一个非常开放的网眼固定在一起。替换目前在欧洲用作的纤维捆绑包针织土工布的管道包裹是一种具有成本效益的解决方案。但是，采用这项技术受到不同问题的限制，包括一个非常保守的商业环境，因为人们担心针织土工织物比一束纤维更敏感了铁och骨堵塞。为了在欧洲市场上引入针织的土工布，该产品必须满足特定的需求，这些需求与工业合作伙伴目前服务的市场无关。首先，必须根据欧洲标准来定义产品，并考虑欧洲的关注，特别是在确定特征开放规模方面。其次，该产品应具有增强的对铁形成的抗性。