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Since sufficient feedwater is not supplied into the economizer though the heat is absorbed from flue gas at the boiler start-up and low load operation, steaming may occur in the economizer. Therefore the economizer recirculation line is provided between the furnace downcomer and the economizer inlet feedwater piping. This line provides the recirculation flow between the drum, the downcomer and the economizer so as to prevent steaming in the economizer. Economizer recirculation valve is only opened at initial stage of the boiler start-up.
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What is the use of recirculation line in boiler feed pump?
A recirculation line in a boiler feed pump is used to return part of the pumped water back to the inlet of the pump. This helps to prevent cavitation and maintain a steady flow of water through the pump. Cavitation is a phenomenon that can occur in pumps when the pressure of the water being pumped drops below the vapor pressure of the water. When this happens, bubbles of vapor can form in the pump, which can cause damage to the pump and reduce its efficiency. The recirculation line helps to prevent cavitation by returning part of the water that has been pumped back to the inlet of the pump. This increases the pressure of the water at the inlet, which helps to prevent the formation of vapor bubbles. As a result, the pump can operate more efficiently and reliably. Overall, the use of a recirculation line in a boiler feed pump helps to prevent cavitation and maintain a steady flow of water through the pump. This can improve the performance and reliability of the pump.
Information of boiler economiser?
check a company called Vahterus Oy from German. we planned to install and replace all heat exhanger in our plant and boiler. One boiler economiser can reduce USD100K per year and PBT Margin is 4% yearly for 10 years. The saving comes from reduce usage of NG of 46sm3/hr
What is the definition of an EGR valve?
EGR stands for exhaust gas recirculation and refers to the valve which acts as the main emissions control in a car. It helps the car burn fuel efficiently.
In a distance vs time graph if the line is perfectly horizontal what does that mean about the velocity of the object?
horizontal
How do you avoid moisture in compressed air line?
Install an air line dryer.
What is the purpose of a boiler economiser?
enviromental pollution control
What does the abbreviation EGR mean?
Exhaust Gas Recirculation.
How does an auto recirculating valve operate?
Auto recirculation valve is used to ensure a minimum flow is maintained through the pump all the time. Recirculation valves are mostly combined with Non Return Valves in the main flow pipe , when flow is established through the discharge line which means that the NRV is open , recirculation valve is closed through a mechanical linkage between the NRV and recirculation valve . Usually the recirculation valves develops passing through it after a period of time due to wear out in the contact points between the NRV and recirculation linkages.
What do the Error codes 0405 and 0404 mean?
Code 0404 is the exhaust gas recirculation circuit range performance problem. Code 0405 is the exhaust gas recirculation sensor A circuit low.
What does the code P0403 mean on Chevy Impala?
P0403 Exhaust Gas Recirculation Circuit Malfunction
What is code po401 on a Toyota Previa mean?
exhaust gas recirculation flow insuffcent detected
What does lamp flash code 12 mean on a 1991 Honda accord EX?
exhaust recirculation system
What does check engine light code P0401 mean?
Exhaust gas recirculation insufficient flow detected
What is the use of recirculation line in boiler feed pump?
A recirculation line in a boiler feed pump is used to return part of the pumped water back to the inlet of the pump. This helps to prevent cavitation and maintain a steady flow of water through the pump. Cavitation is a phenomenon that can occur in pumps when the pressure of the water being pumped drops below the vapor pressure of the water. When this happens, bubbles of vapor can form in the pump, which can cause damage to the pump and reduce its efficiency. The recirculation line helps to prevent cavitation by returning part of the water that has been pumped back to the inlet of the pump. This increases the pressure of the water at the inlet, which helps to prevent the formation of vapor bubbles. As a result, the pump can operate more efficiently and reliably. Overall, the use of a recirculation line in a boiler feed pump helps to prevent cavitation and maintain a steady flow of water through the pump. This can improve the performance and reliability of the pump.
What does the code P0406 mean on a Dodge Ram 1500?
P0406 Exhaust Gas Recirculation Sensor A Circuit High
Where is the EVR filter on a 1992 town car and what do you do to clean it?
do you mean the EGR valve? The Exhaust Recirculation Valve? EGR
What does P0404 OBD code mean?
Trouble code P0404 means:Exhaust gas recirculation circuit range/performance
