油脱臭工艺是食用油制造流程中的关键下游处理工艺，该工艺会使用大量蒸汽从加热的油脂中去除游离脂肪酸和其他挥发性化合物。油脱臭工艺是在高真空度下进行的，而传统的“湿式”真空去除蒸汽的方法是使用蒸汽喷射器增加压力，使蒸汽可以在热交换器中冷凝。该工艺是废物流管理中的重要成本驱动因素。
相比之下，DC技术是在用于油脱臭工艺的1-3 mbar压力下进行的，它消耗的能量最多只是传统“湿式”真空系统所需的10-20%，并且仅消耗0.1%的水。我们DC系统的运行成本仅仅是传统蒸汽排放方法的一小部分，通常在约3年内即可获得投资回报。
当压力保持在低于5.8 mbar三相点时，水仅以两相存在，即蒸汽相和冰相。直接冷凝技术在适当的低压和低温下进行，因此水蒸汽可以直接冷凝成冰而无需经过液相，这种现象称为“去升华”。使用GEA的DC系统后，仅排出少量的冷凝水，从而降低了与废水处理相关的成本。从油中洗涤出来并进入蒸汽的污染物，更容易从较小的体积的溶液中分离出来。
GEA的卧式三冷凝器规格和用于均质制冰的特殊工艺阀相结合，是维持真空的关键，并有助于确保可靠、无故障的连续运行。 我们的系统可以整合到现有工厂中，也可以作为新设备的一部分进行配置。
GEA在干式冷凝真空技术方面拥有50多年的经验，我们已经为全球领先的加工商提供了70多家工厂，其应用包括食用油脱臭、脂肪酸蒸馏和分馏、水升华（冷冻干燥）、甘油蒸馏， 以及在真空下去除水蒸汽。
GEA工厂始终为我们的客户提供功能强大、可重复性高和无故障工艺和产品。我们经验丰富的项目管理团队将会带领您的项目顺利地从最初的设计阶段至到最后的安装和测试。您可以从一系列全面的服务和工厂升级计划中进行选择，我们将在提供产品的整个使用寿命内为您的工厂提供支持、维护和优化性能。
What are the advantages of dry condensing?
When held at pressures below its 5.8 mbar triple point, water exists in just two phases, vapor and ice. The direct condensing technology is carried out at suitably low pressure and temperature so that the water vapor can be condensed directly into ice – a phenomenon known as de-sublimation – without having to go through the liquid phase. Using a DC system from GEA only a small amount of condensed water is expelled after de-icing, which reduces costs associated with wastewater disposal. Pollutants stripped out of the oil into the steam can be more easily separated from the smaller volume.
The combination of GEA’s horizontal three condenser format and special process valve for homogeneous ice-building are key to maintaining the vacuum, and help to ensure reliable, continuous trouble-free operation. Our systems can be retrofit into an existing plant or configured as part of a new installation.
How does dry condensing work?
Learn in this 2D animation how the cryogenically driven vacuum system operates.
GEA plants are built to offer robust, reproducible and trouble-free processing, right from day one. Our skilled project management teams will take your project smoothly from initial design through to final installation and testing. Choose from a range of comprehensive service and plant upgrade programs and we will support, maintain and optimize the performance of your plant for its complete lifespan.
Want to learn even more?
Webinar: Dry condensing
- Learn the core principles of this cryogenically driven vacuum system.
- Dive deep into the process flow of a dry condensing line.
- Discover the practical benefits of ice condensing over conventional wet ejector systems and gain practical insights for your edible oil processes.
- Get in touch with real life examples.
