METHOD OF CLEANING CATIONITE FILTERS FROM PRODUCTS OF REGENERATION AND IRON COMPOUNDS Russian patent published in 2008 - IPC B01J49/00 C02F1/42 C02F103/04 

FIELD: technological processes.

SUBSTANCE: invention pertains to methods of cleaning cationite filters from products of regeneration and iron compounds and is designed for use in an iron exchange system of water treating works, heat power engineering, public service boilers, as well as industries which use treated water in their technological processes. The method involves passing water from top to bottom through the cationite, with hardness of not less than 2.5 mg-eq/l as calcium, speed of 6-8 m/h and flow of water to residual hardness of 0.03 mg-eq/l as calcium, in the washing water. Cleaning is done with specific flow of not more than 3 m³/m³ of cationite in two stages. On the first stage, initial water is passed through the cationite, treated by a magnetic field to residual hardness of 0.7 mg-eq/l as calcium, in the washing water. The cationite is then cleaned in stagnant magnetic water for 1-2 hours. On the second cleaning stage, initial water is passed through the cationite without magnetic treatment. Magnetic treatment is done by passing initial water at a speed of 0.5-1.5 m/s through a pipe shaped magnetic device, based on permanent magnets with flux density of 0.2-0.35 tesla. The invention provides for increasing economical efficiency of the method and lowering ecological damage by reducing specific flow of cleaning water, increasing the working exchange capacity of the cationite due to increased speed and degree of cleaning from products of regeneration and iron compounds.

EFFECT: increased economical efficiency of the method of cleaning cationite filters from products of regeneration and reduced ecological damage.

2 cl, 3 dwg, 3 tbl, 2 ex