How to Pick the Proper Filtration Equipment
Filtration是从液体或空气等过程流中去除任何不良物质（固体或其他）的过程。过滤之前的传入流称为流出物，而过滤后的出站流则称为滤液。
In any fluid-handling operation, filtration helps to maintain peak productivity by improving the performance quality through the removal of any undesirable contaminant. There are numerous filtration applications in markets such as chemical, food and beverage, paints and coatings, pulp and paper, power generation, and other industrial processes which require specific and properly-selected filter equipment. Selecting the right equipment is a crucial component to optimizing your operations. To determine the proper filtration equipment requirements, one must understand a host of process conditions and variables that may influence selection decisions.
There are two golden rules to consider when selecting filtration equipment. The first is that the nature of the contaminant will always dictate how exactly it will be removed. Impurities being removed react differently to various filter media. Optimal removal will be dependent primarily on particle size and shape, if the particle is a solid or deformable, how the particle behaves in fluid, and is it inert or “alive”? Fully understanding what the contaminant is all about will help assure the correct filter type and filter micron size are selected.
The second golden rule is that the process conditions and process variables will dictate the material selection of the equipment. Among the various process conditions and variables, here are the key factors to consider for proper filter selection.
过程变量
- The viscosity of a fluid
粘度是材料对流动的耐药性的度量。这取决于材料的厚度和粘性。向下降低微米尺寸的过滤粘性流体通常需要更大的过滤器，并且还需要正确选择的泵，因为这些粘性流体对流动性更具耐药性。
- Flow rate
在给定的时间内推动过滤器的材料量决定了过滤器和过滤器外壳的大小。使用较高的流速，必须确保有足够的过滤区域，以使过滤器正确地执行并在最佳效率上执行。
- 过滤点的温度.
The filter material must be durable enough to withstand the actual process temperature of the application.
- Chemical compatibility issues
Chemicals that do not change their physical properties and remain chemically stable while interacting are considered compatible. The given fluid’s chemical make-up and how it might react with the filter media, filter housing material, and seal material must be considered to avoid any deterioration due to chemical incompatibility.
Process Conditions
- The Inlet pressure of the pump
入口压力影响与流速相同的滤波器性能。大多数工业过滤器的额定值为150 psi；虽然液压过滤器通常可以额定为500 psi且更大。但是，每个过滤器介质都具有最大的差分压力，可以在更换之前处理并预防效率低下。流体通过过滤器后的泵的入口压力与出口压降之间的差异是差压力。每种类型的过滤器介质都将具有最大推荐的差分额定值，这确定了何时需要更改该过滤器的点。
- The desired capture efficiency.
The size of materials allowed to pass through the filter is determined by the micron size. Typically, a filter is either manufactured with a nominal or absolute micron rating; which denotes the smallest size particulate that the given filter will remove. Again, the size of the contaminant will typically determine the desired “capture point” and then % removal requirements will determine just how clean one’s system needs to be. In all cases, the lower the micron size, the smaller the particle size captured.
- 最初的清洁差压力。
如上所述，差异是对下游和上游压力读数之间差异的测量。理想情况下，对于最长的过滤器使用寿命，安装新的过滤器时，应以最低允许的清洁差压力降低滤波器系统。在大多数过程应用中，无大于5 psid的清洁差压力下降是典型的目标点。
- Where in the process line is the filter going to be installed?
需要将系统设置，管道和类型的连接视为滤镜外壳的大小和尺寸及其方向。
- Batch vs Continuous
通常，过滤过程有两种主要类型。批处理过程和连续过程。批处理过程是通常在诸如油漆，涂料，油墨和化学物质等应用中看到的更短，更明确的过滤过程。通常，袋类型过滤器用于这些材料，在这些材料中，每批更改它们，通常比用于较长跑步但更昂贵的过滤器弹药筒元素成本较低。
连续过程是更长（连续），更恒定的过程/操作通常大于24小时，有时甚至几周，几个月，年等。连续的过程应用包括锅炉室水，一些RO/DI水系统，液压驱动的油应用，植物空气系统等。墨盒是连续过滤系统的主要选择，因为它们提供了卓越的清洁度，更长的寿命以及更广泛的媒体和微米选择。
Determining and verifying all this information can be time-consuming. Anderson Process’s in-house filtration equipment experts know filtration technology inside and out. Our team will take the time to learn about the unique challenges of your operation; all while assisting and guiding you to properly navigate the selection and specification process. Coupled with our comprehensive line of filtration products, our joint analysis will allow us to determine the optimal filter specifications to integrate into your process to enhance efficiency, output, and profits.