1. Low-Temperature Evaporation: Temperature Control Range

For low-temperature evaporation of wastewater, the conventional controlled temperature range is 40℃ - 60℃.

For heat-sensitive materials: 35℃ - 40℃.

For high-salt / high-viscosity wastewater: 60℃ - 70℃.

This temperature refers to the boiling point under vacuum negative pressure, not the heating temperature.

2. Core Advantages of Low-Temperature Evaporation vs. High-Temperature Evaporation (Extremely Critical)

1. Lower Energy Consumption

High-temperature evaporation: Requires temperatures above 100℃, resulting in high energy consumption.

Low-temperature evaporation (heat pump / MVR): The energy consumption per ton of water is only 1/3 - 1/5 of that of high-temperature evaporation.

2. Almost No Corrosion to Equipment

High temperature → The corrosiveness of salts, acids, and alkalis increases sharply.

Low temperature → Less material loss, longer equipment service life.

3. No Damage to Heat-Sensitive Substances

Pharmaceuticals, food, fine chemicals, electroplating solutions, etc., cannot withstand high temperatures.

Low-temperature evaporation: No decomposition, no deterioration, no volatilization, no odor generation.

4. Better Quality of Condensed Water

High temperature tends to vaporize organic substances, ammonia nitrogen, and odors together.

Low temperature: Pollutants are more difficult to volatilize, and the effluent water is cleaner.

5. Lighter Scaling and Easier Cleaning

High temperature easily causes hard scaling and pipe burning.

Low-temperature scaling is soft and easy to clean.

6. Safer Operation, No Risk of Steam Scalding

No high-temperature steam, no high pressure.

The workshop is safer and has lower noise.

3. One-Sentence Summary (Can Be Directly Used in the Plan)

Low-temperature evaporation controls the temperature within 40℃ - 60℃.

Compared with high-temperature evaporation, it has significant advantages such as low energy consumption, little corrosion, good water quality, light scaling, wide application range, and safer operation.