Sulfur Recovery Daily Question 2018.10.25

Fluid transport; heat transfer; mass transfer – these three

Unit operations are classified according to the basic principles on which they are based: ① Hydrodynamic processes. This is a category of unit operations whose main theoretical basis is momentum transfer, including fluid transport, sedimentation, filtration, mixing, etc. ②Heat transfer process. This is a category of unit operations based primarily on the theory of heat transfer, including heat exchange, evaporation, etc. ③Mass transfer separation process. This is a category of unit operations based primarily on the theory of mass transfer, used for the separation of various homogeneous mixtures, including distillation, absorption, extraction, etc. ④Heat and mass transfer process. This is a type of unit operation that is determined by both the laws of heat transfer and mass transfer. This process differs from heat transfer processes or mass transfer separation processes; its rate calculation is more complex, and the limits of the process are no longer thermal equilibrium and phase equilibrium. This process includes unit operations such as humidification, dehumidification, drying, and crystallization. ⑤Thermal processes. This is a category of unit operations that are based primarily on thermodynamics, such as refrigeration. ⑥Powder Engineering. These are operations related to the processing and movement of solid particles, including crushing, fluidization, and particle grading

The unit operations in refineries are generally divided into three categories: fluid transport, heat transfer, and mass transfer.

It is generally divided into three categories: fluid transport, heat transfer, and mass transfer