射流器在引入纯氧工艺 中的应用
吸入纯氧的喷射器结构形式和操作方式与压缩空气作为动力源的喷射器相似的。它们通常安装在曝气池内，通过干式安装或潜水安装的泵操作。与吸入压缩空气的喷射器相比，纯氧的注入是在泵的出口端及喷射器的入口端，通过安装在管线上的喷嘴系统来完成。所以，预混合发生在喷射器入口前的压力最高端。
在通过喷射器的流动中这种预混合进一步被加强，相当数量的气体溶解在污水中，喷射器中流体的静压能转化成动能，使注入到曝气池中的气液两项流进行充分湍流混合。
应用领域
除了转移氧外，射流器也可以用在曝气池的混合工艺，在没有空气吸入的情况下，无需搅拌器，保证间歇式的硝化及反硝化的发生。在曝气池中，由射流器产生的流动防止了沉积的发生。射流器在系统中是免维护的，通过调整单个的射流器工作状态来优化氧转移系统。这样可以减少功率消耗，减少泵的数量。
射流器被用在：
- 满足最大负荷；
- 满足基本负荷操作；
- 在臭氧装置中引入作为尾气的气态氧
布置
除了多路径的喷射器外，单向的喷射器也被广泛使用，安装在池子的地板上或墙壁上。所有的喷射器可以由不锈钢制成，喷射器的材质取决于污水的成分。这种紧凑的结构允许在池子地板上进行固定安装或安装在同一的底架上
业绩
介绍
位于德国Ettringen的Lang 纸业公司的两个3400 m³曝气池中的氧传输系统。8个六路射流器分别用来将下游臭氧装置排放的氧气供入系统。
DescriptionThe installation of 12 six-path ejectors was completed during the course of converting the waste water treatment plant of the Rheinland Raffinerie Godorf Works belonging to Shell Deutschland Oil GmbH to an intermittent gassing with pure oxygen. Respectively 3 ejectors each are connected with a pipeline and fed mutually from a submersible motor-driven pump. The pump is mounted on the pipeline by means of an underwater coupling and can be retrieved any time via guide tubes. |
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Discription
Towards the end of 2009 Körting Hannover AG received an order from the Westfalen AG covering the supply of an oxygen introduction system for application in the waste water treatment plant of a German food maker. As the system had to be installed during active plant operation, a so-called "skid-mounted unit" was chosen which consisted of two single-path ejectors and a submersible motor-driven pump mounted on a common base frame. The 22 kW unit delivers an hourly amount of 400 m3 waste water into which 80 kg of gaseous oxygen is introduced. With this, the microorganisms in the 2600 m3 large activation tank are kept alive and moving.
Apart from the oxygen introduction system, a square section with lifting eyes for lowering the completely assembled unit made up of ejectors and submersible motor-driven pump as well as a small switchboard cabinet belonged to our scope of supply. The system was installed and put into operation without any problems occurring.
At the same location the final customer also operated a further identically constructed aeration tank which, one year later, we were able to equip with an identical oxygen introduction system. Here too, our customer was the Westfalen AG.
With this project, the Westfalen AG, as a national and international supplier of technical gases, and Körting Hannover AG, as an independent manufacturer for oxygen introduction technology, have laid the foundation stone for a successful collaboration.
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