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the repeated return of all or part of a stream of gas, liquid, or solid substance to, for example, a technological process, plant, or apparatus. Recirculation is used for various purposes, such as the regulation of component concentration in mixtures and temperature in heat exchangers. In chemical engineering, the yield of the final product can often be increased by a recirculation of the raw materials.
REFERENCESNagiev, M. F. Teoriia retsirkuliatsii i povyshenie optimal’nosti khimicheskikh protsessov. Moscow, 1970.
Kasatkin, A. G. Osnovnye protsessy i apparaty khimicheskoi tekhnologii, 8th ed. Moscow, 1971.