I would like to ask about the absolute pressure at the top of the distillation tower.

The gauge pressure at the top of the catalytic fractionation tower is generally between 0.1 MPa and 0.15 MPa; the absolute pressure plus 0.1 MPa will give this value. It is affected by the pressure in the anti-reaction system, and it is also related to the pressure drop in the fractionation tower.

^_^. . . The absolute pressure in the fractionation tower depends on the total pressure of the oil and gas coming from the settler in the reaction section, and it is in equilibrium with the pressure at the top of the settler. . . Generally, it is around 2 kg of pressure, with variations; it’s not very consistent. . . Some catalytic units operate with a regenerator pressure increase mechanism; to maintain the pressure difference between the two units, the pressure at the top of the vessel also increases accordingly. . . At this time, the pressure in the fractionation tower is also high. . . The pressure in the fractionation tower and the general pressure drop at the top of the column depend on the pressure drop across the butterfly valve at the top and the pressure drop in the oil and gas lines; these values can be as low as around 200 KPa, or as high as half a kilogram. . . :lol

Well, yes. It depends on the pressure of the reaction; ours is usually maintained at 1.6 Kg.

The gauge pressure at the top of the distillation tower is generally between 0.1 MPa and 0.15 MPa; the absolute pressure can be obtained by adding 0.1 MPa to it.

The absolute pressure at the top of the distillation column should be the actual pressure in that column, that is, the gauge pressure at the top of the column plus atmospheric pressure. It is 0.1–0.15 MPa + P_atmosphere that constitutes the absolute pressure at the top of the distillation tower.

Our gauge pressure is generally between 0.1 MPa and 0.14 MPa

The absolute pressure in the main fractionation tower is 0.29 MPa； Standby unit at 0.2MPa

The change at 0.19MP is minimal