Summer: Birds are chirping, flowers are blooming, and scrap rates are up!

这不仅仅是你;夏季的时间可以在加工和处理塑料材料 - 特别是潮湿的材料,易于服用水分的挑战。让我们快速看看为什么,以及如何帮助避免这些问题,无论月份如何,都要制作一致的产品。

In this blog, we will touch on 3 key considerations for drying plastics in the summer months:

  1. Dryer design
  2. 初始含水量
  3. Dryer Maintenance

How Dryer Design Impacts Drying Plastic in the Summer:

不是所有的烘干机创造平等,但不幸的是发现冒名顶替者并不总是容易的。您问题的关键可能位于系统的设计中,因此您需要了解单个鼓风机和双鼓风机设计之间的差异。

Single Blower Dryers:This means that the blower used to dry plastic is also used to purge the system of moisture. This loss in air from the system requires the dryer to make up the air from the surrounding room. This is typically done through a hole in the system that is located in the filter housing. In the summer, this air is very wet and humid.

您是否有一个似乎在冬季表现出色的系统,但在夏天造成头痛的任何东西?这可能是由于单一鼓风机设计。这就像打开空调并打开窗户。它只是没有意义,通常导致更效益和更少的效率烘干机。

单鼓风机烘干机设计图
Diagram of Single Blower Dryer Design

双鼓风机烘干机:The alternative is separating the two functions to different blowers. In a dual blower design, one blower is for drying plastic, and a separate, smaller blower is for regenerating the desiccant or purging the moisture out of the system. At Conair, we use this “dual blower” design because it has the advantage where the only moisture that our dryer sees is that which is taken out of the plastic. It is a totally closed loop that is unaffected by the environment.

双鼓风机烘干机设计图
Diagram of Dual Blower Dryer Design

初始含水量如何在夏季产生干燥塑料:

Dryers are designed to control four major variables in thedrying process:

  1. 温度
  2. 时间
  3. Airflow
  4. 露点

However, there is another critical variable that dryers can’t control, and that is the initial moisture content of the material you are drying.

Plastic gains moisture depending on the type of material, the environmental conditions, and the time of exposure. In the summer, your environment is more humid, so material can gain higher amounts of moisture at much faster rate.

克服初始湿度含量挑战:
如果你想想initial moisture content like running a race, the further from the finish line you are, the longer it will take to get there and the more energy you will have to use.

To combat this issue, it is a good idea only to open the bags of material you plan you use within a few minutes or hours depending on your material and environment. Any unused materials should be put back in re-sealed bags and boxes.

如果你打算2018世界杯狗万滚球app, you may want to consider a dry air blanket to help maintain moisture while material sits idle.

烘干机维护如何在夏季产生干燥塑料:

在干燥器上进行定期维护对于在潮湿的夏季期间使其最佳地运行至关重要。三个区域应位于维护清单的顶部:

Check for Air Leaks in Your Drying System

空气泄漏在系统中提供突破,允许环境环境进入干燥系统,类似于我们之前提到的“单鼓绒”设计。这需要干燥剂和干燥机做更多的工作。

泄漏泄漏费用,使干燥器能够保持稳定的过程。此外,泄漏空气可能是抢劫所需的气流过程,以适当地加热和干燥材料。

该怎么办:检查干燥机以确保软管是安全的,连接很紧。确保您的门有良好的密封件,没有泄漏。这将使您的系统像顶部一样运行。

检查干燥系统的气流

Air restrictions such as crushed hoses or dirty filters can hamper airflow in the system and rob the process of critical air required for drying.

该怎么办:检查烘干机软管,以确保他们没有以限制气流的方式压碎,分层或弯曲。

Filters should also be cleaned frequently and changed regularly to ensure good airflow.

The actual frequency of filter maintenance depends on the quantity and quality of material that you process. If excessive fines or particulate are present in the material being dried—or in ambient plant air used in drying or regeneration—a dust collector can be added to the intake/return air circuit to reduce the burden on the filter and extend filter maintenance intervals.

当干燥树脂在干燥过程中释放挥发物(例如,PET,TPU,柔性PVCs,TPV等)时,将出现另一种与过滤器相关的问题。当过程空气进入后冷却器时,挥发物聚集成油性或蜡质污染物,如果它们在后冷却器热交换器或干燥剂轮的表面上积聚时会导致问题。理想情况下,应使用除雾器过滤器和挥发性疏水阀(大多数干燥器上可选择)从工艺空气中收集挥发物,这必须定期排水和清洁。否则,累积的挥发物可以干扰传热,堵塞干燥剂轮(需要清洁或更换),甚至造成可燃性风险。

Inspect the Effectiveness of your Dryer’s After Cooler

After cooler effectiveness can also play a part in your dryer’s efficiency and process stability.

To work efficiently, desiccant likes cold air. The after cooler plays a big part in cooling the air down.

该怎么办:If you are using a water-cooled dryer, make sure you have good flow and water temperature. It may also be a good idea to pull the coil periodically for a thorough cleaning.

Unlike our competitors, all Conair Dryers come with some sort of internal after cooler. It’s not an add-on or upsell. In some cases, this after cooler is air-cooled and in other cases, it’s water-cooled depending on dryer size and customer preference.

Keeping Plastic Material Dry No Matter the Season

That’s it. Running a dryer in the summer that’s as easy as one, two, three.

无论季节或条件如何,上面都会使您的材料保持这些简单的步骤和提示。

If it seems like a lot to remember, don’t get intimidated. All Conair Plus and Premium controls come withmaintenance alerts and remindersthat enable the dryer to tell you when it’s time to do the work.

Looking to learn more about drying plastics?

如何确定您的干燥机在夏季最佳地运行

如何确定您的干燥机在夏季最佳地运行

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