水行业中流量控制的好处
The involvement of flow control within water industries can be split into two main areas: potable water and wastewater. Both areas are essential in the lives of us all; the availability of drinking water when we turn on the tap and how effluent and sewage is managed are key services we all rely on. Actuators are key items of equipment in potable and wastewater applications. This article will look at the requirements and challenges of these applications and will focus on examples of how flow control equipment allows the smooth running and success of water sites around the world.
什么是流控制？
Actuators operate and move valves and are the key items of equipment in flow control.. They can be electrically, hydraulically or pneumatically controlled. Effective flow control helps to improve efficiencies and increase water supply. Many operators in water require valves and dampers to move repeatedly between set positions. They are involved in a variety of applications including filtration, desalination, distribution, dams, reservoirs and irrigation systems. The ability of actuators to do this makes processes more efficient, minimises waste and reduces energy consumption.
Electric actuators are common within the wider water industry. They provide precise operation, with repeatability and resolution. Flow control equipment within water applications must have water ingress protection to provide continuing operation and ensured reliability. Actuators within Rotork’s IQ range are environmentally sealed in the factory. They are double-sealed to IP66/68 at 20m for 10 days, protecting the internal components from water, moisture, dirt and dust. Robust, long-lasting equipment with minimal maintenance even in extreme environments is necessary within water applications. For example, in 2021 Rotork supplied IQ3 actuators to several water treatment sites in New Zealand. Previously, the sites had pneumatic actuators but required environmentally sealed electric actuators because of the damp, chlorinated atmosphere. The new actuators provide control of filters, as well as the chemical dosing and storage of potable water. Electric actuators have another benefit for operators: they do not need power compressors to provide an air supply to pneumatic actuators.
Potable water
有不同的方法来创建适合饮酒的水。在海水脱盐厂和淡水处理厂的几乎所有过程控制应用中，从进口到分配都可以找到流量控制。过滤是这些应用程序中的关键过程。经过部分处理的水通过菌株（例如沙子或无烟煤）的培养基。使用了不同类型的过滤器，例如简单的慢砂过滤器或快速重力砂过滤器。流量控制在过滤过程中至关重要。在2020年升级的一部分中，将300个智商执行器安装在美国水过滤厂。他们在芝加哥的尤金·索耶（Eugene Sawyer）净水厂运营12到30英寸the facility’s sand filters.
Wastewater treatment
The treatment of wastewater and its future discharge or reuse (such as within irrigation systems) requires specialist equipment and precise control to comply with strict environmental regulations. The use of actuators and subsequent automation ensures efficient effluent treatment and protection of the environment. Treated water is often returned to the sea or other water sources, subject to local policies. Flow control is central to this process. In 2020 electric CK actuators were ordered to control the flow at Ergene Basin Deep Marine Discharge Project, Turkey, one of the longest sea discharge lines in Europe. The electric actuators operate penstocks at the treatment plants. It is essential that actuators in this context can reliably operate within high temperatures and demanding environments.