Gravity Distillation equipment manufacturers rectifying section describes the material balance
In the analysis of the operation of the distillation column, it is often required to master the tower adjacent to the quantitative relationship between gas, liquid concentration between the two plates between, this relationship is called the operating line relationship, the equation expressing this relationship called operating line equation. Performed by the rectifying section can be drawn from the material balance equation rectifying section operating line for the stripping section can be drawn from the material balance equation distillate mention operating line segment.
(A) the assumption of constant molar flow
To simplify the calculations, the introduction of gas, the basic assumption of constant molar flow was as follows.
(1) Constant molar vaporization? In the distillation process, each plate rectifying section within the steam rising molar flow equal to y represent. So also within the stripping section to mine expressed. However, two of the ascending vapor molar flow are not necessarily equal.
(2) constant molar overflow? In the distillation process, each plate fall within the rectifying section of the liquid molar flow rate equal to L represent. So also within the stripping section, with L, Fig. But two of the liquid molar flow not necessarily equal.
Gravity Distillation equipment manufacturers rectifying section describes the material balance
In the analysis of the operation of the distillation column, it is often required to master the tower adjacent to the quantitative relationship between gas, liquid concentration between the two plates between, this relationship is called the operating line relationship, the equation expressing this relationship called operating line equation. Performed by the rectifying section can be drawn from the material balance equation rectifying section operating line for the stripping section can be drawn from the material balance equation distillate mention operating line segment.
(A) the assumption of constant molar flow
To simplify the calculations, the introduction of gas, the basic assumption of constant molar flow was as follows.
(1) Constant molar vaporization? In the distillation process, each plate rectifying section within the steam rising molar flow equal to y represent. So also within the stripping section to mine expressed. However, two of the ascending vapor molar flow are not necessarily equal.
(2) constant molar overflow? In the distillation process, each plate fall within the rectifying section of the liquid molar flow rate equal to L represent. So also within the stripping section, with L, Fig. But two of the liquid molar flow not necessarily equal.
If the plates when the gas-liquid two-phase in contact with 1km. Steam condensate 1, there is a corresponding 1km. Vaporization of the liquid 1, assuming a constant molar flow that is established. To do so, you must meet the following conditions: ① each component equal molar latent heat; ② When the gas-liquid two-phase contact with sensible heat due to the temperature difference in the exchange can be ignored; ③ fractionator good insulation, heat loss can be ignored.
When distillation operation, though it is a constant molar flow hypothesis, but a lot of things system, especially with similar structure and properties of matter based component constituted basically in line with the conditions described above, the object of this chapter the research process can be assumed by accord .
(B) rectifying section operating line equation
Rectifying section operating line equation by the dashed line range (including rectification paragraph i + 1 shelf on the tower section and condenser) 10-3 as shown in the material balance.
