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Process Description
Hydrogen Chloride gas is produced from the variety of process industries & mainly from chlorination operation. This must be scrubbed before venting to the atmosphere. Hydrogen chloride has great affinity of water and easily absorbed in water.
The absorption of Hydrogen Chloride gas in to water cause large amount of heat, which has to be removed by means of suitable device.
The falling film absorber is the simplest form of HCl absorber, which can be operated continuously. Falling Film Absorber is a vertically mounted shell and tube heat exchanger.
The standard configuration of the falling film absorber consists of a suitable shell and tube heat exchanger with the necessary drain outlet for the acid.
The Hydrogen Chloride Gas enters at the top of the absorber and flows concurrently with water/Dilute HCl.
Cooling Water is circulated through shell side of the Falling Film absorber to absorb the heat generated by the dilution of Hydrochloric acid gas with water.
Due to its unique design and construction, the heat of absorption is efficiently removed at the zone of absorption, thereby making the absorber extra efficient. Thus the higher concentration of acid is produced due to low absorbing temperature.
- Capacity Range – 10Kg /hr to 900 KG/hr.
- Available up to 600mm dia.
Salient Features
- High absorption efficiency.
- High acid concentration achievable.
- Low outlet temperature.
- Easy operation and maintenance.
- Safe Operation due to low isothermal temperature.
- Handle a wide range of gas loading with minimum liquid flow rates to maintain full tube wetting.
- All the wetted parts of the falling film absorber are corrosion resistant to all the aggressive gases even at elevated temperatures.
- Variation in Hydrogen Chloride Gas flow rates or Composition causes no operation problem.
Other Area of Application: Hydrogen Chloride Gas / Sulphur Dioxide Gas Absorption Hydrogen Chloride Gas / Chlorine Gas Absorption Hydrogen Chloride Gas / Chlorine Gas / Sulphur Dioxide Absorption Hydrogen Bromide Gas absorption.
