Method and apparatus for heating, ventilating and exhaust air purifying of industrial buildings

Claim 1

Apparatus for producing high air quality in industrial plant buildings, wherein a high degree of air exchange, recovery of heat from the exhaust air and purification of the exhaust air discharged into the atmosphere takes place, said apparatus comprises a feed air tower resting on the floor of the plant building and extending through the roof of the plant building, said tower having the following elements arranged from top to bottom therein: a rain hood, feed air and circulating air openings having closing flaps, a ventilator, a wetting system, a heat exchanger, fine-mesh filters, adjustable feed air nozzles for providing treated air to approximately the lower two meters of the plant building, a drip water-collecting trough and condensate drain conduit; and said apparatus further comprising a liquid heat recovery system connected to the heat exchanger of said feed air tower having a heat exchanger unit disposed in the stream of exhaust air, a pump for returning the liquid to the heat exchanger of said tower, a water injection system disposed in the exhaust air stream upstream from said heat exchanger therefor, a wetting grid with a drip water collecting trough arranged beneath said grid and disposed downstream of said system, and a heat pump for transfer of heat between the exhaust and the feed air.