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Project Background

A waste acid recovery facility required a reliable solution to recover thermal energy from highly corrosive process gas streams while minimizing corrosion-related shutdowns and maintenance costs.

Fluoroplastic-steel heat recovery equipment was selected to enable long-term operation under acidic condensation conditions.

    Real waste acid recovery facility featuring:
  • ● Waste acid regeneration system
  • ● Fluoroplastic steel heat recovery equipment
  • ● Acid gas treatment system
  • ● Industrial piping network
PROJECT PARAMETERS

Operating Data Table

Parameter Value
Process Type Waste Acid Recovery
Flue Gas Flow Rate 180,000 Nm³/h
Flue Gas Inlet Temperature 165°C
Flue Gas Outlet Temperature 95°C
Heating Water Flow Rate 420 t/h
Water Inlet Temperature 45°C
Water Outlet Temperature 85°C
Flue Gas-Side Resistance ≤ 650 Pa

* Representative project data for an environmental flue gas waste heat recovery application. *

CHALLENGES

  • Acidic condensate formation below the acid dew point.

  • High corrosion risk for conventional metallic heat exchangers.

  • Need for deep heat recovery without sacrificing equipment reliability.

  • Long operating cycles with minimal maintenance requirements.

SOLUTION

Fluoroplastic-Steel Heat Recovery System

The system utilizes fluoroplastic corrosion-resistant heat transfer surfaces combined with steel structural support, enabling reliable low-temperature operation under severe acidic environments.

  • ● Acid dew-point protection
  • ● Corrosion-resistant heat transfer surfaces
  • ● Low-temperature heat recovery
  • ● Long lifecycle operation
  • ● Custom thermal design

RESULTS

  • Deep Heat Recovery

    Recovered additional low-grade thermal energy.

  • Improved Energy Utilization

    Higher overall heat recovery efficiency.

  • Reduced Utility Consumption

    Lower external energy demand.

  • Long-Term Reliability

    Stable operation under corrosive conditions.

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