The form of atmospheric and vacuum tower
Thread Content
For processing heavy crude oil, the reduced bottom yield is above 50% and the processing capacity is 1.5 million tons. What type of normal and vacuum tower should be used? Packing or plate type? What are the advantages and disadvantages of each? Which technology is better, plate type or packing technology? Hope everyone can discuss it.
Pressure reduction towers are generally dry vacuumed and use packing to reduce pressure drop.
Plate towers are mostly used in atmospheric towers. During capacity expansion and transformation, packed towers can be changed to increase processing capacity.
Just like ours, normal pressure plate towers and vacuum towers can be used. Packed towers have small resistance, and plate towers are cheaper to build.
For the atmospheric tower, choose the plate type, which has great processing flexibility and is easy to operate. Choose the strip float valve tray. It is better to choose packing for the pressure reduction tower. It uses the commonly used structured packing, which has small pressure drop and large processing capacity.
Our factory uses an atmospheric plate type tower, and a vacuum tower that uses a plate type and packing mixed type. Above the first line is the packing section, and the yield during operation is okay.
It is recommended to use a plate tower for normal pressure, and a packed tower for reduced pressure. It is better to use a plate tower for an atmospheric tower, and it is recommended to use a float valve tray. Among the float valve trays, there is the V1 float valve (F1 float valve), which is the most traditional tray. It has been proven by the factory to have stable performance and high efficiency. But it falls off easily (the round one rotates easily). There is also the Super V1 float valve of Beijing Petroleum University, which is an improved float valve based on the previous HTV ship-type float valve. It has high efficiency, low pressure drop (the ship-type structural resistance is small, the pressure drop is low), is easy to install, and is not easy to fall off. The lower limit valve hole kinetic energy factor of the vapor phase can reach 2-3 (other trays are generally 5-6), and has greater elasticity. Others include strip float valves, T-shaped float valves, etc. It is recommended to use packed tower for pressure reduction tower. There are many filler manufacturers across the country, and the prices are basically the same. However, Tianjin University’s filler is the most stable and has the best effect. Tianjin University also has several filling companies, such as: Tianjin University * * Distillation Center, Tianda Tianjiu Company, Tianda Beiyang Company, etc.
Especially for heavy oil, packed towers must be used
When dealing with heavy oil and the gas phase load is not large, a packed tower can be used. Zipu Chenxiang and Lanshi Institute have better internal parts of the tower.
I agree with the 7th floor's point of view, it has been explained in detail. Generally, the normal pressure tower is a plate type, and the reduced pressure tower is a packing type.
It is generally accepted that normal pressure towers use plate towers, and vacuum towers generally use packed towers. I think if you want to increase the atmospheric pressure processing capacity with as little investment as possible and without making major changes, it is best to choose trays with high operating flexibility, such as ADV and CST trays. The pressure reduction tower can also be increased by one piece, and a plate type or packing mixing type can be used to deeply extract part of the diesel components.