July 30, 2013

CIP Filters: Popular Types

In the first part of selection criteria of CIP filters, we have discussed about the cost factors while in the second part of it we have mentioned about some important benefits. In this post I am sharing few types of CIP filter which may be useful for all process engineers.

This is a very short post with few details on various common & popular type of CIP filters.

In this category of filters that is CIP (or Cleaning in Place), the following are the major type of elements.

1. Candle Filters
CIP polish filters for fine filtration up to 1 micron with the help of precoat or body feed. this type of filters are ideally suited for carbon removal or catalyst recovery type of application where very fine particles are involved and if you use any other media it may clog easily.

It protects operator from hazardous handling and pyrophoric solids if involved.

2. Auto Self Cleaning Filter
For filtration of cheaper fluids like water at high flow rates and filtration requirement of 50 micron and more, this is the best CIP filter. It can be used for process fluid also, waste water treatment, utilities etc. Cleaning is generally done by the same filtrate to avoid any effluent generation even in the chemical processes.

3. Auto Cleaning with Scrapper
Now new technologies are coming up day by day for all process operations. For various viscous liquids like sugar, oil etc the filtration is always very tough and is the biggest cost consuming item. Now technologies are available for such operations e.g. scraper mechanism for cleaning of filter surface.

In the above sketch you will realize that top left of drawing is having a baffle shape plate which is a scrapper and rotates continuously at slow speed. This helps in removing the choking and continuous removal of solids.

4. V Sep Filters
V sep filters are used in very large scale handling like sewage treatment plants, coal washeries, Municipal waste and CETPs where large scale general operation of main bulk separation is required.

5. Basket / Strainers
Last but most used category is the filters used for pumps which are more commonly known as basket filters or strainers. They may be in different shapes & sizes and will be in many different options.

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