Fractionator superheated steam

This can be explained by referring to Dalton’s law of partial pressures and Henry’s law; by using superheated steam, the partial pressures of other gas components in the tower are reduced, which in turn lowers the solubility of the gases that need to be removed in the oil, thereby achieving the desired production outcome

We only have it for the hydrogen sulfide stripping tower here

Superheated steam carries a lot of heat, so less heat can be extracted from other areas at the bottom of the tower, resulting in less water in the product at the bottom.

1. The main purpose of bottom blowing in a vacuum distillation tower is to reduce the vapor pressure of oil and gas, thereby increasing the vaporization rate of the oil products and thus enhancing the overall yield of the plant； Another function is to balance the vapor-liquid phase loads within the tower, maintaining stable operation. 2. The main purpose of blowing air into the stripping tower is to remove the light components from the side-stream product, so that the boiling range of the product meets the quality requirements. 3. The gas blown into the tower is in gaseous state; the heat absorbed or released due to temperature changes in this gas is sensible heat, its enthalpy and mass are low, and the amount injected is very small, making it negligible for the thermal balance of the tower. Therefore, the temperature of the blown gas (in an anhydrous condition) has no significant impact on the operation of the tower.

Personal understanding: 1. Superheated steam is introduced into the tower; since its temperature is higher than that of saturated steam, phase change is less likely to occur, which better meets the conditions required by Dalton’s law of partial pressures and facilitates the gas lift effect. 2. Saturated steam contains no liquid water, so it does not easily cause bumping at the bottom of the tower; this facilitates stable operation of the distillation tower and helps maintain consistent product quality.

Ordinary steam not only fails to provide a stripping effect, but it may also lower the temperature of the oil at the bottom of the tower, increase the amount of moisture inside the tower, which in turn prevents the temperature at the top of the tower from rising. This leads to lower temperatures in the side streams, water contamination, and an increased volume of water discharged from the reflux tank; as a result, the oil quality becomes poor due to the presence of water in it

Superheated steam contains little water, preventing fluctuations caused by water in the downstream stream~~~

Superheated steam provides good stripping efficiency and is generally used in stripping towers. Heating furnaces are commonly used at the bottom of distillation towers