Heat Recovery Steam Generator (HRSG)
A Heat Recovery Steam Generator (HRSG)
The HRSG consists of several key components:
10. Chemical injection in an HRSG (Heat Recovery Steam Generator) is crucial for water treatment, foam, Scale and Deposit formation, corrosion control, and maintaining the overall health of the system. The specific chemicals used and their injection locations may vary depending on the HRSG design, water quality, and operating conditions. However, here are some common chemical injections and their typical locations in an HRSG:
a. Oxygen Scavenger: Oxygen scavengers are chemicals used to remove dissolved oxygen from the feedwater to prevent corrosion in the HRSG. They are usually injected at the deaerator or in the feedwater storage tank.
b. PH Adjustment: pH control is important to maintain proper water chemistry. Acid and alkaline chemicals are injected at different locations to adjust the pH of the feedwater. Acid injection is typically done at the deaerator or economizer inlet, while alkaline chemicals may be added in the feedwater or at various locations to balance the pH.
c. Phosphate Treatment: Phosphate-based chemicals are added to the feedwater to control pH and prevent scale formation on heat transfer surfaces. These chemicals are commonly injected into the feedwater system, typically at the deaerator or economizer inlet.
The generated steam can be used to drive a steam turbine to produce additional electricity or provide heat for industrial processes or district heating. By utilizing this waste heat, HRSGs significantly increase the overall efficiency of a power plant, which is often referred to as a Combined Cycle Power Plant (CCPP). CCPPs combine the gas turbine's Brayton cycle and the steam turbine's Rankine cycle, maximizing energy conversion and reducing greenhouse gas emissions.
HRSGs play a vital role in the energy industry, especially in power plants, where they contribute to the sustainable and efficient use of fuel resources. Additionally, they have applications in various industrial processes where waste heat recovery can lead to cost savings and environmental benefits.
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Ahmed Hamdy Abd Elrahman........✍️✍️✍️
"Please feel free to share your thoughts, suggestions, or any modifications regarding our recent discussions. Looking forward to hearing your valuable comments!"
Designer using SOLIDWORKS (Self-employed)
12moElectricity production by river water with a flow of less than 5 degrees I have designed a power plant project that can generate the same amount of electricity as a dam from several points in a river. It was accepted in Australia and America several years ago. I can demonstrate and prove it with SOLIDWORKS
2019 TCHNICAL AFFAIR MANGEMET: Cairo Electricity Production Company في Cairo Electricity Production Company
1yVery Good
Electrical Maintenance Engineer at Engie
1yHi Ahmed .Good work keep it up
Senior Mechanical engineer and vibration analyst certified CATII, CATIII course MDEPC
1yHello again Ahmed Hamdy Abd Elrahman ,many thanks for these valuable informations . But about preheat system I think it's only increase the temperature of water that enter dearator just for release oxygen form water and if we changed into fuel oil we don't operate preheat system because the pressures inside it becomes greater than pressure at used of gas oil.