Plate absorber
Thread Content
This workshop is equipped with a plate-type absorption tower, with a total of 20 plates. Plates 1 to 7 are baffled plates, plates 7 to 10 are counter-current plates, and plates 10 to 20 are bubble-cap plates. We would like to invite everyone to discuss the role of each type of plate in this equipment. (Note: Tray numbers 1–20# from bottom to top)
What kind of system does \"absorption\" refer to upstairs? The properties of the system, whether the absorption process is exothermic or not, the gas-liquid ratio, and the operating pressure? :)
Sorry, I forgot to mention it: this tower is used for absorbing acrylic acid. The feed temperature is around 165 degrees; it contains small amounts of acraldehyde, CO, CO2, N2, etc. The boiling point of acrylic acid is 141 degrees, while that of acraldehyde is 53 degrees. The temperature at the bottom of the tower is 62 degrees, and the pressure at the top of the tower is 13 KPa.
The processing process is an absorption process from \"coarse\" to \"fine\"； Plate resistance from low to high. The main consideration is to increase the absorption of equilibrium between the two media. In terms of absorption efficiency, the efficiency of these three types of trays increases gradually from bottom to top.
This type of design is often used in atmospheric towers. Baffles 1~7# are suitable for locations with high viscosity and lower requirements for absorption efficiency; they function to carry out preliminary separation below the feed inlet of the tower. A tray is a flat plate without rising vapor holes; the gas-liquid contact occurs in the space between the trays. As the liquid falls vertically from the edge of the baffle, the gas phase passes horizontally through the liquid curtain to come into contact with it. Numbers 8 to 10 represent flow plates, which have a spoon-shaped design; the bottom of the spoon is equipped with numerous distributed holes (sieve pores). As the liquid falls vertically through these sieve pores, the gas phase passes horizontally through the liquid curtain and comes into contact with it. In situations where the pressure drop is low and the separation requirements are not high, located above the feed inlet. Generally, three trays are used. 11~20# bubble trays provide normal bubbling contact.
The explanation upstairs was really thorough; I learned something from it
Is the “pressure at the top of the tower of 13 KPa” an absolute pressure or a gauge pressure? With such a high feed temperature, absorption should take place at atmospheric pressure, right?