Heat exchanger effluent collector

A gas to gas heat exchanger comprising:

• element supporting baskets each supporting a plurality of heat transfer elements arranged to form closed passageways therebetween operable for fluid flow through the closed passageways;
• a heat transfer element cleaning system arranged within an untreated flue gas outlet duct of the heat exchanger, equipped with a plurality of nozzles fluidly connected to a fluid supply operable for an upward fluid spray cleaning of accumulated substances from the plurality of heat transfer elements and closed passageways and for downward drainage of the accumulated substances and sprayed fluid from the plurality of heat transfer elements and closed passageways;
• an effluent collector hopper arranged below the heat transfer element cleaning system and operable for collection of the downward drainage of sprayed fluid and accumulated substances removed from the plurality of heat transfer elements and closed passageways;
• and
• an effluent collector hopper cleaning system equipped with a drain and fluidly connected to a fluid supply operable for a horizontal fluid spray cleaning of the effluent collector hopper for fluid and accumulated substance drainage from the effluent collector hopper through the drain to clean and prevent effluent collector hopper clogging.