In chlorine production and chemical processing, precise chlorine gas flow measurement and control is essential for process stability, product quality, and plant safety. Chlorine (Cl₂) is a highly corrosive and toxic gas that requires specialized instrumentation to manage both accuracy and durability.
This case study highlights how the MTL20FD High Accuracy Mass Flow Controller was applied in a chlorine plant, providing accurate measurement in grams per hour (g/h) and enabling closed-loop control to optimize dosing and minimize risks.
Anwendung:
Accurate measurement and control of chlorine gas flow in grams per hour (G/h) for industrial processes.
Anforderungen:
- High accuracy (±0.5% or as specified)
- Flow display in grams per hour (G/h)
Customer Challenges
The chlorine plant faced several operational challenges:
- Stable dosing required: Chlorine flow must be precisely controlled for chemical reactions to avoid overdosing or underdosing.
- Corrosion resistance: Standard flow meters failed quickly due to chlorine’s oxidizing nature.
- Process integration: The customer needed a device with 4–20 mA control signal for automatic regulation via DCS.
- Direct mass unit (g/h): Operators required g/h display for simplified process monitoring and reporting.
- Durability and safety: Equipment needed to perform reliably under 2–3 bar pressure without frequent maintenance.
Metlan’s Solution: MTL20FD High Accuracy Mass Flow Controller
Die MTL20FD was selected as it provides both measurement and active control of chlorine gas flow. Unlike conventional flow meters, this model integrates a control valve and supports closed-loop PID control, making it suitable for high-precision gas dosing.
Key Technical Configuration
- Medium: Chlorine gas (Cl₂)
- Flow rate: 200 g/h (≈ 1.04 L/min)
- Genauigkeit: ±0,5%
- Display: Digital display, direct g/h readout
- Sensor: PTFE-type for chemical resistance
- Seal: FFKM (perfluoroether rubber) for long-term sealing in corrosive service
- Maximum Pressure: 3Mpa
- Connections: Ferrule type, ID 10 mm
- Control signal: 4–20 mA for DCS integration
- Power supply: 24 V DC
