Candle filters are a type of filter used in various industrial processes for liquid-solid separation. These filters are composed of a cylindrical tube (candle) made of porous materials, such as ceramic or metal, through which the fluid passes. The porous material acts as a filter, removing impurities and solid particles from the liquid.
Candle filters are commonly used in the oil and gas industry, as well as in chemical and pharmaceutical industries, for applications such as the polishing of final products and the removal of impurities from the process streams. They are also used in wastewater treatment and in the food and beverage industry for the filtration of beverages like beer, wine, and juice.
Candle filters can be made of various materials such as ceramic, sintered metal, and metal mesh, depending on the application requirements. They come in various sizes and shapes, and their filter rating can be adjusted by selecting the appropriate filter media and pore size.
The advantages of candle filters include their high dirt-holding capacity, low-pressure drop, and ease of operation and maintenance. However, their main disadvantage is the need for frequent cleaning and replacement of the filter media, which can be costly and time-consuming.