The automatic filter cleaning system (CIP – cleaning in place) by KMA Umwelttechnik is a system for the comprehensive cleaning of electrostatic precipitator cells and other modules in KMA exhaust air filtration systems. Each filtration system by KMA Umwelttechnik can be equipped or retrofitted with an automatic filter cleaning system.
The KMA ULTRAVENT® filter cleaning system combines heated washing water and cleaning agents to clean the respective filter modules. The ratio of water to cleaning agent is adapted to the respective requirements in order to remove even persistent filtration residues. The fully automatic washing system consists of a washing tank with heating rods and a nozzle block. The cleaning water is heated in the washing tank to the set temperature and is then transferred to the nozzle block via a feed pump. The nozzle block sprays the washing water under high pressure and in stages onto the modules. The high pressure causes oils, fats and incrustations, the so-called filter cake, to detach from the surfaces of the precipitator cell. The used washing water flows into a collection tray and is transferred into an external tank to be recycled, treated and reused if requested.
To keep water consumption as low as possible, belt filters are used where necessary. These clean the contaminated wash water with the aid of a fleece. The fleece is stretched as a belt over a filter basin with one take-up and one take-off roller. The wash water hits the fleece and seeps through the belt into the tank under the force of gravity. In the process, coarse particles and other impurities settle in the fleece, depending on the fleece structure selected. The cleaned wash water is then fed back into the cleaning cycle. Due to the high particle load, the filter fleece becomes clogged after some time and the wash water can no longer flow through it unhindered. This causes the wash water to back up in the filter basin. When the water level reaches a certain level, the built-in float sensor sends a signal to the filter belt and the fleece continues to move, motor-driven, until the contaminated section of the belt has been transported further.
Using the KMA filter cleaning system (CIP) ensures a constantly high separation efficiency and filter function. It can be individually programmed and operates fully automatically, rendering the control through workers unnecessary. Starting time and duration of the cleaning cycle can be selected manually or be adapted to the running cycles of the respective production machine. Furthermore, the cleaning cycles can be programmed to specific weekdays or time slots. The high-grade adaption of the automatic filter cleaning system (CIP) allows for an efficienct and energy saving cleaning of KMA precipitator cells. Removing any build-up from the precipitator cells offers two advantages – persistant accumulations are removed without any residue, while reducing maintenance requirements of the filter modules to a minimum (see also: particle filtration).