Page 245 - ANTEST KATALOG

HCL GAZ ABSORBER ÜNITESI GAZ ABSORBER ÜNETISI
STANDARD TYPICAL UNITS

GAS ABSORBER - FALLING FILM TYPE
Hcl GAS ABSORBER - ADIABATIC TYPE
Process Description
HCL absorption columns are used for absorption of Hydrochloric gas which
Efficient gas absorption depends on the following:
statutorily are not permitted to vent into the atmosphere, and to produce
1. Intimate contact 2. Efficient Heat Transfer the HCl acid. Hydrogen Chloride is very soluble in water but it's absorption is
This is achieved in a Falling Film Absorber which is essentially a shell & tube complicated by the high heat of solution and the high partial pressure over
heat exchanger in which both, gas to be absorbed and absorbing liquid, warm concentrated solutions. In practice, the basic problem in making
flows co-currently downward with extraction of heat by circulation of concentrated solutions is one of efficient heat removal. In this type of
coolant in the shell. The abssorbing liquid is circulated through a tank till absorber, the heat of absorption is removed by evaporation of water and
desired concentration is achieved. The liquid flows at such a rate that the acid in the column. The vapour being condensed is diluted with 'makeup'
tubes do not flow full of the liquid but instead, descends by gravity along therefore, mostly removed via condenser. Concentration and cooling of the
the inner walls of the tubes as a thin film. Obviously, this produces a much liquid phase is assisted by evaporation of water to maintain the
greater linear velocity for a given rate flow than could be obtained if the vapour/liquid equilibrium in the lower part of the packed section.
tube flowed full. The column is constructed with a series of packed sections, a gas
The equipment works as a number of water cooled-wall columns in parallel introduction point below that, a condenser on the top, and a cooler at the
and each tube is provided with distribution system on top to effect uniform bottom and water is sprayed from the top and acid is collected from the
244
distribution of both liquid and gas and also formation of a thin liquid film on bottom. Hcl absorption columns are available in 80DN to 300DN diameter
the inner surface of the tube. (for the gas rate 10 Kgs/hr to 300 Kgs/hr approx.)

PACKED CONDENSER GAS RATE
SANAYİ TIPİ DİSTİLASYON SİSTEMLERİ
SALIENT FEATURES COLUMN HTA (m2) (Approx.) CAT. REF.
1. High absorption efficiency.
2. High acid concentration achievable. 80mmx3m 0.35m2x2 10Kg/hr AHCL3
20Kg/hr
0.5m2x2
100mmx4m
AHCL4
3. Low outlet temperature. 150mmx4m 1.5m2x2 60Kg/hr AHCL6
4. Easy operation and maintenance. HCL GAS ABSORBER 225mmx4.5m 2.5m2x2 150Kg/hr AHCL9
5. Safe Operation due to low isothermal temperature. 300mmx4.5m 2.5m2x2 300Kg/hr AHCL12
6. Handle a wide range of gas loading with minimum liquid flow rates
to maintain full tube wetting.
7. All the wetted parts of the falling film absorber are corrosion
resistant to all the aggressive gases even at elevated temperatures.
8. 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

SPECIFICATIONS:

NO. OF MAX. GAS MAX. ACID
TUBE ABSORPTION PROD. RATE
NOMINAL ABSORBER TUBE OD RATE ( Pure HCL) (As 30% HCL )
SIZE (mm) AREA (m2) (mm) ( kg/Hr) (kg/Hr) CAT. REF.
80 1.00 4/20 30 100 AFFA3
100 1.76 7/20 60 200 AFFA4
150 4.80 19/20 150 500 AFFA6
225 7.80 31/20 250 833 AFFA9
300 15.30 61/20 500 1667 AFFA12
400 36.00 143/20 1175 3917 AFFA16
450 47.00 187/20 1500 5000 AFFA18
600 84.00 333/20 2700 9000 AFFA24

89
88