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Systems & EPC

Gas Drying

HCl Drying System

Continuous HCl gas drying and purification with modular molecular sieve adsorption.

Three adsorption towers alternate adsorption and regeneration for continuous separation and purification.

Moisture can be controlled down to 5 ppm.
Molecular sieve service life can reach 3–5 years.
Modular design helps reduce site installation costs.
Acid Desorption

Hydrochloric Acid Desorption System

Steam-heated HCl recovery system for producing clean hydrogen chloride gas.

Hydrochloric acid is heated by steam to desorb HCl gas for reuse or absorption.

Produces purified HCl gas from hydrochloric acid.
Supports acid absorption and reconcentration loops.
Common route besides direct H₂ and Cl₂ synthesis.
Contact
Pressure Swing

Pressure-Swing Distillation System

HCl gas recovery by using pressure-driven changes in hydrochloric acid azeotrope.

The system concentrates acid under vacuum and desorbs HCl gas under positive pressure.

Recovers HCl gas from hydrochloric acid streams.
Uses pressure variation to change azeotropic behavior.
Suitable when extractive routes are not preferred.
Extractive Distillation

Hydrochloric Acid Extractive Distillation System

HCl recovery system using CaCl₂ extractant to break acid equilibrium.

CaCl₂ is added to hydrochloric acid to support extractive distillation of HCl gas.

Applicable to hydrochloric acid at different concentrations.
Diluted CaCl₂ can enter concentration systems for reuse.
Helps recover HCl gas through equilibrium adjustment.
Waste Acid

Waste Acid Evaporation System

Evaporation system for separating HCl and water from waste acid streams.

Evaporation separates HCl and water, while impurities and waste components are concentrated.

Supports single-effect, multi-effect and MVR routes.
Helps concentrate low-concentration acid materials.
Improves evaporation efficiency compared with kettle evaporation.
Acid Concentration

Sulfuric Acid & Material Concentration System

Evaporation system for concentrating dilute sulfuric acid and process materials.

Different evaporation routes are selected according to concentration, impurities and material behavior.

Graphite evaporation can concentrate sulfuric acid to 60%–75%.
Forced circulation suits fouling, crystallizing or viscous materials.
Block-hole or tubular graphite evaporators can be selected.
Two-in-One

Two-in-One HCl Synthesis System

Integrated HCl synthesis and cooling system for gas or acid production.

Hydrogen and chlorine burn to form HCl gas, followed by cooling and downstream use.

Combines synthesis and cooling sections.
HCl gas can serve PVC, polysilicon or absorption processes.
Reaction heat can be used to produce hot water or steam.
Three-in-One

Three-in-One HCl Synthesis System

Integrated synthesis, cooling and absorption system for hydrochloric acid production.

The system combines synthesis, cooling and absorption while using a separate tail gas absorber.

More compact than two-in-one synthesis systems.
Supports hot water or steam generation from reaction heat.
Top ignition or bottom ignition options are available.
Four-in-One

Four-in-One HCl Synthesis System

Compact HCl synthesis system integrating synthesis, cooling, absorption and tail gas absorption.

The system integrates four process sections to produce hydrochloric acid with a smaller footprint.

More space-saving than three-in-one systems.
Generally suitable for hydrochloric acid capacity below 250 MTPD.
Automatic ignition control can support unattended site operation.
Acid Dilution

Sulfuric Acid Dilution & Cooling System

Skid-mounted dilution and cooling system for concentrated sulfuric acid.

Concentrated sulfuric acid and pure water mix, then graphite cooling removes dilution heat.

Dilutes 98% sulfuric acid to required concentrations.
Dilute acid outlet temperature can be controlled below 45°C.
Skid delivery shortens installation, testing and commissioning time.
TiO₂ Waste Acid

Titanium Dioxide Waste Acid Treatment System

Waste acid treatment system for sulfuric-acid-process titanium dioxide production.

Dilute sulfuric acid is concentrated for reuse, reducing waste and disposal pressure.

Concentrates 20%–25% dilute sulfuric acid to 65% or higher.
Two-effect counterflow forced circulation reduces steam consumption.
Membrane treatment can reduce evaporator blockage risks.