• Characteristics:
Generates steam using "flue gas" or "process gas". Unlike other heat exchangers, waste heat boilers have the following characteristics:
1. Operate at high pressure and high temperature.
2. Require adjustment of outlet gas temperature and prevention of dew point corrosion.
3. Structure and materials must withstand high temperature, high pressure, erosion, and corrosion.
4. Consider scaling and blockage.
• Pros and Cons:
1. Energy-saving!
2. Compared to other heat recovery equipment, it has high energy conversion efficiency and rapid response.
3. The disadvantage is the need for boiler water quality control.
• Design Features:
1. Special attention is needed to prevent dry burning issues.
2. The higher the evaporation pressure, the better the heat transfer efficiency.
3. The gas inlet temperature should be as close as possible to the steam saturation temperature to avoid thermal stress.
4. Optimal design steam velocity: 10 to 20 m/s; too fast can cause erosion and pressure drop; too slow can lead to unstable flow.
5. Hot point: around 30°C.
6. Pinch Point: approximately 5°C to 15°C. The lower the Pinch Point temperature difference, the higher the equipment cost.
7. Approach Point: approximately 5°C to 12°C. Keeping the Economizer outlet temperature slightly below saturation temperature aims to avoid evaporation.
Generates steam using "flue gas" or "process gas". Unlike other heat exchangers, waste heat boilers have the following characteristics:
1. Operate at high pressure and high temperature.
2. Require adjustment of outlet gas temperature and prevention of dew point corrosion.
3. Structure and materials must withstand high temperature, high pressure, erosion, and corrosion.
4. Consider scaling and blockage.
• Pros and Cons:
1. Energy-saving!
2. Compared to other heat recovery equipment, it has high energy conversion efficiency and rapid response.
3. The disadvantage is the need for boiler water quality control.
• Design Features:
1. Special attention is needed to prevent dry burning issues.
2. The higher the evaporation pressure, the better the heat transfer efficiency.
3. The gas inlet temperature should be as close as possible to the steam saturation temperature to avoid thermal stress.
4. Optimal design steam velocity: 10 to 20 m/s; too fast can cause erosion and pressure drop; too slow can lead to unstable flow.
5. Hot point: around 30°C.
6. Pinch Point: approximately 5°C to 15°C. The lower the Pinch Point temperature difference, the higher the equipment cost.
7. Approach Point: approximately 5°C to 12°C. Keeping the Economizer outlet temperature slightly below saturation temperature aims to avoid evaporation.