The article analyzes the installations and methods used at oil refineries for recycling the heat of exhaust flue gases in order to increase the efficiency of fuel use in tube furnaces and accompanying reduction in pollutant emission into the air basin. Recommendations on rational type selection of waste heaters for furnace units of oil refining industries are given.The authors present fundamentally new installations for burning liquid fuel in the form of oil-water emulsions using the heat recovery of emitted combustion products of furnace installations for heating the oil-water emulsion and its further environmentally friendly combustion, i.e. reduction of harmful emissions. The proposedoriginal installations differ from well-known analogues in the novelty of their design, a fairly high environmental effect and relatively low material costs.