A heat recovery steam generator (HRSG) is a key component of a gas turbine combined cycle power plant with high thermal efficiency and low CO2 emissions. An HRSG is a heat exchanger that extracts a significant amount of heat from a gas turbine's exhaust gases. The heat is recovered as steam, which is used to power a steam turbine that generates electricity.
Finned tubes with outstanding heat-transfer capability are used in the HRSG's heat-transfer tubes. The equipment's footprint is decreased by using a small design. Additionally, within the HRSG, Selective Catalyst Reduction (SCR) equipment is installed, which reduces the nitrogen oxide concentration of the exhaust gases emitted into the environment.
Energy is lost in thermal oxidizers, gas turbines, and other heat generators. Heat Recovery Steam Generators (HRSG) are utilized to create steam in order to recover energy and use it for other purposes.
HRSG systems may be found in a wide range of commercial and industrial settings. HRSG systems are most typically employed in major energy projects, cycle power plants, and even institutions. Schools may use recovered energy to power their campus, heat spaces, and supply hot water to residents.
Alaqua is a processing equipment supplier for crystallizer, heat exchanger, evaporator, solvent recovery, distillation and spray dryers for various industries such as food, pharmaceutical, chemical, environmental, and power generation industries.
HRSG Cleaning Types
High-pressure water blasting, carbon dioxide (dry ice) blasting, grit blasting, and pressure wave cleaning are some of the most common forms of cleaning technologies on the market. Because each has its unique set of benefits, a plant's selection is made on an individual basis.
- Pressure Wave Cleaning
- High Pressure Water Blasting
- Grit Blasting
- Dry Ice Blasting
Pressure Wave Cleaning
A hose is fed into a heat recovery steam generator for pressure wave cleaning. The engineer uses a
computer to manage the ethane-oxygen gas discharged inside the system as it moves about inside. The impurities inside the HRSG are rattled by the gas, which dislodges the debris. It sinks to the bottom of the HRSG, making cleaning easy.
High Pressure Water Blasting
High pressure water blasting (also called hydrojetting or high-pressure cleaning) removes surface debris and pollutants using high-speed, pulsing water produced by a water jet. Even the most tenacious coatings or process contaminants cannot withstand the energy generated by ultra-high pressure hydroblasting. High-pressure hydroblasting equipment is not only effective in a wide range of industries, but it is also ecologically benign, minimizing carbon emissions.
Grit Blasting
Abrasive grit blasting, often known as sandblasting, is a process that uses pressured water, steam, or compressed air to push an abrasive media (material). The blasting material can be used to smooth rough surfaces, roughen smooth surfaces, shape a surface, or eliminate impurities from the surface.
Blasting can use a variety of media, some of which are very abrasive and others that have a mild impact. The choice of media is influenced by a variety of components. Often, sample processing is required before deciding on the final media type, size, and equipment for the grit-blasting process.
The following are examples of commonly used abrasives:
- Steel grit
- Crushed glass
- Aluminum oxide
- Plastic
- Baking soda
Dry Ice (CO2) Blasting
Dry ice blasting is widely regarded as one of the most effective cleaning methods for HRSGs for a variety of reasons. Sandblasting and high pressure water blasting, in most situations, produce a secondary waste stream that adds to the waste stream.
Cleaning up additional garbage adds to a project's total cost and time. Dry ice blasting is an ecologically friendly and FDA-approved procedure that doesn't encourage corrosion or abrasion. There is no secondary trash created by CO23 blasting since it does not employ abrasives or excessive water. This decreases both the cost and the time it takes to complete the procedure.
Effects of Fouling on HRSG Component Performance
As a result of routine activities, trash and debris accumulate over time in day-to-day operations. Heat-rate deterioration, loss of steam generation, corrosion, and decreased heat transfer efficiency can all occur as a result of this accumulation over time. These problems result in a reduction in producing capacity and, as a result, revenue.
Maintenance is the most effective strategy to preserve your equipment's value and productivity. Cleaning services from HRSG are a long-term investment in your operating productivity and equipment longevity. To deliver ecologically safe and highly effective cleaning solutions, trained personnel employ cutting-edge technology.
Features of HRSG
Major attractive features of HRSG’s are that they:
- Have high reliability and high performance
- Are highly cost-effective
Alaqua is an experienced processing equipment supplier having more than 25 years of experience in supplying various processing equipment such as evaporators, crystallizers, etc. for various industrial purposes mentioned earlier. They also offer their services for the processing equipment that include equipment fabrication, training personnel, installation, and commissioning services, field services, troubleshooting services, and retrofitting services. Contact them today to buy your desired processing equipment and for their services!
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