| 摘要 |
FIELD: ventilation systems; technological processes characterized by considerable emission of toxic agents and agents presenting fire and explosion hazard. ^ SUBSTANCE: proposed device has air supply line, air supply attachment and air intake with discharge branch pipe which is mounted inside air supply attachment coaxially relative to it forming circular supply passage with contraction pipe nozzle at its outlet which is profile as contraction pipe portion of Laval nozzle. Supply attachment and discharge branch pipe are mounted for motion relative to each other. ^ EFFECT: enhanced efficiency; control of area of localization of toxic emissions. ^ 2 dwg |
