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HCI Gas Generation Unit (Azeotropic Boiling Route)

Capacity : From 5 Kg/Hr to 200 Kg/Hr
Spent Acid (20% HCI) as by product

Over View of The System

The system consists of
HCl Thermosyphon Reboiler -Glass/ Metal
HCl Stripping Column - Glass
Series of Condensers - Glass
Spent Acid Cooling Heat Exchanger -Glass
Sulphuric Acid trap - Glass (Optional)

Raw Material Requirement

30 % HCl
98 % H2SO4 - Negligible for Trap (Optional)

By-Product Generation

20-21 % HCl

Utility Requirement

Cooling Water 32 Deg C
Chilled Water 5 Deg C
Chilled Brine (-) 20 Deg C
L.P.Steam - 3.0 bar g

Process Description

30% HCl is fed to the unit continuously by the Pump or through Overhead tank depending upon the customer requirement and site height availability. HCl feed is adjusted by stroke according to the requirement if fed through metering pump. In this case, Feed Rotameter is not required for HCl. If the 30%HCL feed fed to the column from overhead storage tank, Rotameter is to be provided to monitor the flow of fluid.

20-21 % Azeotropic HCl/Water mixture is formed into Thermosyphon Reboiler by boiling 30% HCl. By product 20-21 % spent Hydrochloric acid is continuously discharged from the bottom of the stripping column. The 20% spent HCl is cooled by an acid cooler prior to discharge into an intermediate spent acid storage tank.

The condensation system at top of column consists of :
Cooling water Condenser
Chilled Water Condenser
Chilled Brine Condenser

Chilled Brine is to be provided to remove the moisture from the HCl gas .If chilled Brine is not available, Sulphuric acid trap is to be provided to remove the moisture from the gas generated. The Product Dry HCl gas is discharged at atmospheric pressure and goes to downstreamequipment.

Once all the operating conditions are stabilized and maintained, rate of generation of HCl gas depends only upon rate of conc. HCl Feed.

All the wetted parts of the system are fabricated from corrosion resistant materials (Glass /PTFE) for the process conditions envisaged.