Media Selection for Nutsche Filter and Nutsche Dryer

When using this technology in your process, it is important to have not only the right size vessel (based on optimum cake depth), but also the right filtration media. This component is critical to the successful filtration of your product. In this article, we will discuss the different options available and how to choose the right one for your process.

 

put the battery pack together/dryers are widely used throughout the chemical and pharmaceutical industries to separate solid products from solvents by forcing liquids through a bed of solids and filter media using pressure/vacuum and agitation in a vessel. When using this technology in your process, it is important to have not only the right size vessel (based on optimum cake depth), but also the right filtration media. This component is critical to the successful filtration of your product. In this article, we will discuss the different options available and how to choose the right one for your process.

 

 

Consider the criteria

Before looking at the different media options available, you need to consider the following elements that will help you determine the right type of media for your application.

Environment

What type of environment will your device be installed in? Environments can range from optimal (clean areas, laboratories) to hostile (underground mining, foundries).      

 

Component Sensitivity

How sensitive are the components to contamination? Any potential sensitivity may cause you to choose certain materials of construction over other options. In addition, if your process requires cGMP, CIP, sterile and/or aseptic design, these conditions will often require the use of certain materials over others.

 

Safety

Is your product dangerous or difficult to handle? Taking proper safety measures is critical to the health of the operator, as failure can cause serious damage to equipment or personnel.

Life expectancy

What is the required service life of the filter media? Depending on the corrosiveness of the product and the production requirements of the process, the life expectancy of the filter media can range from a few hours to over 20,000 hours. Knowing the life expectancy requirements will help predict the downtime required to replace the filter media.

Pressure

How stringent are your operating settings and duty cycles? Pressure settings can range from full vacuum, light/low pressure to heavy/full pressure.

 

 

Filter Base

The base of a suction filter dryer consists of a support structure (usually a porous or solid heated plate) and a filter media. The type of support structure will depend on the requirements of the process. The heated filter plate provides heat directly to the filter cake from the bottom, allowing heat transfer through all filter contact surfaces, resulting in more efficient drying. The perforated plate design allows for maximum open area for filtrate discharge or airflow. Regardless of design, the base consists of a support plate strong enough to support the weight of the cake and the pressure exerted on its surface. All filter plate designs are capable of limited deflection when the unit is at full operating pressure.

 

Filter Media

The function of Nutsche filters is based on the deep bed filtration principle. For deep bed filtration, the filter cake provides the primary mechanism for particle retention and flow resistance. The filter media begins to form a cake, which increases in thickness as the process progresses. The filtration rate and efficiency become a function of the physical properties of the retained solids and the process parameters (cake thickness, filtration pressure, etc.). The filter media does not usually affect the treatment rate. However, the media can negatively affect the process by allowing fines to pass or clog.

The size of the filter media is usually determined by the porosity or particle retention rate. It is important to know the particle size distribution of your product when determining the best filter media size for your process. This provides a starting point for media evaluation. Depending on your tolerance for fines or solids bypass, you may choose a media that is finer than solids, or allow some fines to pass through during the start of filtration. With deep bed filtration, once the filter cake is formed, it will capture finer particles than the media retention rate.

 

TOPTION vacuum filter is mainly used for liquid-solid filtration under vacuum condition , it has been widely used in laboratories , food & beverage factory , water filtration and chemical industries nowdays . Through filtration can be donesimply with gravity , more often vacuum filtration is employed because the filtration speed is much faster with high vacuum .

Please contact us today to find the quote.