Candle filtration is a relatively safe, efficient, and pollution-free new filtration method. Candle filters have the characteristics of high efficiency, energy saving, closed and high-precision, easy maintenance, safety and reliability, and high degree of automation. They can be widely used in solid-liquid separation filtration in industries such as petroleum, plastics, electroplating, chemical, ceramic, pharmaceutical, sugar, etc.

Candle filtration has gradually replaced filter press and bag filtration as the mainstream filtration method, in which the repeated use of filter media saves a lot of filtration consumables; The cylinder is tightly sealed to ensure no leakage during the production process; Microcomputer automation full process control not only maintains the continuity of enterprise production, but also greatly reduces the risk of production accidents while improving production efficiency and saving labor.

Candle filter is an automated pressure filtration device, mainly composed of a cylinder, filter element, filter cloth, filter aid, computer control system and accessories. Other auxiliary equipment includes an air compressor, pressure sensor, etc. The materials of the cylinder and filter element are mainly stainless steel (304/316/321), carbon steel, titanium, and the filter aid is configured according to the filtration standards required in the production process, mainly including activated carbon, diatomaceous earth, etc. Candle filter, as a large-scale equipment on the production line, is usually also known as candle filter machine.

The cylinder of the filter is equipped with one to multiple filter elements, which are covered with specialized filter cloth selected according to the characteristics of the raw material liquid (some special raw material liquids require the addition of filter aids, such as activated carbon, diatomaceous earth, etc.). When the liquid passes through the filter cloth, solid substances in the liquid will gradually accumulate on the surface of the filter cloth. When these solid substances reach a certain thickness, a so-called 'filter cake layer' is formed Due to the small gaps between particles in the filter cake layer, the escape of impurities in the liquid particles is blocked, which makes the filtrate clear and achieves the required filtration effect for production.