FIELD: process engineering.
SUBSTANCE: invention relates to clearing of off-gas containing ash particles. Process of off-gas ash particle (2) transformation comprises the steps that follow. a) Isolation of nitrogen dioxide or oxygen in off-gas. b) Ash particles (2) ionisation by electric field (16). c) Sedimentation of charged particles (2) on inner walls (17) of surface separator channels (6). d) Bringing nitrogen dioxide or oxygen in contact with deposited charged particles (2) on inner walls (17) of surface separator channels (6). Besides, this invention covers the appropriate device to this end. Note here that it incorporates surface separator (6) with several channels (7) for off-gas flows extending between inlet area (8) and outlet area (9). Note also that inlet area (8) has ash charged particles (2) deposition barrier (10). This allows a uniform deposition of said particles and a continuous recovery of surface separator.
EFFECT: higher efficiency of separation.
14 cl, 8 dwg
