Disadvantages of Float Valve Tray:
The general structure of a float valve tray is to open many holes on the tray with a downcomer as air flow channels. Above the holes, there are valve plates that can float up and down. The rising air flows through the valve plates and contacts the liquid flowing across the tray for mass transfer. A rough comparison of the float valve tray with commonly used bubble caps, sieve plates, tongue shaped trays, and other trays is as follows:
① The processing capacity is smaller than that of tongue shaped and sieve shaped trays, and is about 20% to 40% greater than that of round bubble cap trays.
② The operating flexibility is greater than that of round bubble caps, tongue shaped, and sieve plates. The tray elasticity is derived from the allowable dimensions of tray hydrodynamics. The float valve tray can maintain high efficiency over a wide range of gas-liquid load variations.
③ The pressure drop on the dry plate is larger than that on the tongue shaped and sieve shaped trays, and smaller than that on the bubble cap tray. The liquid level gradient on the tray is also smaller.
④ The entrainment amount of mist is smaller than that of tongue shaped and bubble shaped masks, and slightly larger than that of sieve plates.
⑤ Simple structure and convenient installation; The manufacturing cost is about 60% to 80% of the bubble cap tray and 120% to 130% of the sieve tray.
