VAG阀门在Evonik在冷却水循环系统中的应用

韦斯林工厂是Evonik工业公司最大的工厂之一，位于科隆以南莱茵兰化学区的中部。在这个占地33万平方米的地区，1200名员工生产各种化学产品，主要用于个人护理产品、轮胎和橡胶制品、纸张、油漆和漆器以及药物合成。化工厂和发电站无差错生产的前提条件是可靠的回水供应。没有冷却，化学过程就不可能发生。

到目前为止，四座木制交叉流动的冷却塔产生了足够的冷却水，这些水通过一个广泛分散的管道网络分布在整个工业区内。该供水管网配备了许多阀门，其中许多阀门已经使用了30年以上。而工厂生产的产品范围和数量的增加的同时也增加了对冷却水的需求。旧冷却塔正达到极限：管道系统需要翻新和扩建。

独特的玻璃纤维增强塑料逆流式冷却塔

2008年，化工公司董事会决定投资数百万建造一个独特的玻璃纤维增强塑料(GFRP)逆流式冷却塔。这种结构非常特殊，不仅因为它长50米，高15米，还因为它有三个巨大的抽气转子。它是世界上最大的冷却塔。

这个庞大项目的设计和计划非常精确，工厂的建设速度惊人。一年后，也就是2009年5月，这座新工厂在原厂维护停产期间投入运行。今天，韦斯林新的冷却回路的心脏可以将12500立方米的水从35度冷却到25度，并将其泵回不同的生产区域。不久，新厂投入运行后，将回笼项目前期投入成本。在设计阶段，我们非常重视使用先进的材料和最新的技术。这也是为什么冷却性能可以提高25%，能源成本可以下降高达30%。

为 VAG 的项目进展顺利而感到自豪

HeinzBlindert是Evonik公司负责的规划工程师，他有充分的理由为他的项目进展顺利感到骄傲。如果没有称职和可靠的合作伙伴，你不可能在如此短的时间内完成这么大的项目。对于阀门，我知道我完全可以依赖我们在VAG-Armaturen的顾问Reinsch先生的建议。我们不仅想在冷却塔中使用最好的材料，我们还想要最好的阀门。这就是我们多年来一直与VAG密切合作的原因。

Further problem solved - with VAG TELEMAX Stem Extension with VARIO position indicator

While the cooling tower and its supply lines were being built, the pipeline network was extended, refurbished and expanded with larger dimensions. This gave Bogdan Gluszek, the responsible planning engineer for the pipeline network, the opportunity to solve a problem that had been causing annoying and costly damage for years: Many of the valves that had been installed underground 30 years ago had become sluggish and no longer sealed tightly. Because it was impossible to determine whether the buried valves were closed or open, employees had overwound the adjusting spindle or worm gear. The valves had to be dug up and the defective parts replaced. Bogdan Gluszek turned to VAG consultant Wilfried Reinsch for advice to make sure he did not repeat the mistakes that had been made 30 years ago.

'The high quality and delivery reliability are clear reasons for us to continue using VAG's products. But what keeps impressing us is the knowledge of VAG's employees. Mr Reinsch solved our problem with the buried Butterfly Valves in the wink of an eye by introducing us to the VAG TELEMAX Stem Extension with VARIO position indicator.' The VAG TELEMAX installation equipment with VARIO position indicator transmits the 'open' or 'closed' position of the valve to the surface, making it impossible to operate the equipment incorrectly due to 'uncertainty' about its position. This prevents the gear being damaged by overwinding it.

Couldn't have been done without reliable suppliers like VAG

Heinz Blindert is happy that this project, which was carried out on the premises of Evonik Degussa GmbH, was successfully completed: 'A year from planning to completion: that's not bad for a project of this size. We're proud of ourselves, but we do have to add that we couldn't have done it without reliable suppliers like VAG. One supplier for all our products, high quality and an excellent consultant who gives us invaluable advice. Projects like this are fun!'

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