Daily Question (October 23)
Thread Content
Title: Briefly describe the disadvantages of adjusting steam temperature by changing air volume during operation? Note: I’ve had difficulty accessing the internet recently, which has meant I’ve been able to participate in management tasks less often. Please forgive me! The score can be increased slightly in the future, but it should not exceed 10 wealth
(1) It increases the flue gas volume, raises the heat loss due to exhaust smoke, and reduces the thermal efficiency of the boiler； (2) It increases the power consumption of the supply and exhaust fans, thereby reducing the economic efficiency of the power plant ； (3) An increase in flue gas volume and flue gas velocity leads to intensified ash wear on the convective heating surfaces of the boiler ； (4) A high excess air coefficient increases the flue gas dew point, increasing the likelihood of low-temperature corrosion in the air preheater.
(1) It increases the flue gas volume, raises the heat loss due to exhaust smoke, and reduces the thermal efficiency of the boiler. (2) It increases the power consumption of the supply and exhaust fans, reducing the economic efficiency of the power plant. (3) An increase in flue gas volume and flue gas velocity exacerbates the ash wear on the boiler’s convective heating surfaces. (4) A high excess air coefficient increases the flue gas dew point, increasing the likelihood of low-temperature corrosion in the air preheater.
1# Standing in the east (1) increases the amount of smoke, raises the heat loss due to smoke exhaust, and reduces the thermal efficiency of the boiler. (2) It increases the power consumption of the supply and exhaust fans, reducing the economic efficiency of the power plant. (3) An increase in flue gas volume and flue gas velocity exacerbates the ash wear on the boiler’s convective heating surfaces. (4) A high excess air coefficient increases the flue gas dew point, increasing the likelihood of low-temperature corrosion in the air preheater.
(1) It increases the flue gas volume, raises the heat loss due to exhaust smoke, and reduces the thermal efficiency of the boiler. (2) It increases the power consumption of the supply and exhaust fans, reducing the economic efficiency of the power plant. (3) An increase in flue gas volume and flue gas velocity exacerbates the ash wear on the boiler’s convective heating surfaces. (4) A high excess air coefficient increases the flue gas dew point, increasing the likelihood of low-temperature corrosion in the air preheater.
(1) It increases the flue gas volume, raises the heat loss due to exhaust smoke, and reduces the thermal efficiency of the boiler. (2) It increases the power consumption of the supply and exhaust fans, reducing the economic efficiency of the power plant. (3) An increase in flue gas volume and flue gas velocity exacerbates the ash wear on the boiler’s convective heating surfaces. (4) A high excess air coefficient increases the flue gas dew point, increasing the likelihood of low-temperature corrosion in the air preheater.
(1) It increases the flue gas volume, raises the heat loss due to exhaust smoke, and reduces the thermal efficiency of the boiler. (2) It increases the power consumption of the supply and exhaust fans, reducing the economic efficiency of the power plant. (3) An increase in flue gas volume and flue gas velocity exacerbates the ash wear on the boiler’s convective heating surfaces. (4) A high excess air coefficient increases the flue gas dew point, increasing the likelihood of low-temperature corrosion in the air preheater.
(1) It increases the flue gas volume, raises the heat loss due to exhaust smoke, and reduces the thermal efficiency of the boiler. (2) It increases the power consumption of the supply and exhaust fans, reducing the economic efficiency of the power plant. (3) An increase in flue gas volume and flue gas velocity exacerbates the ash wear on the convective heating surfaces of the boiler. (4) A high excess air coefficient increases the flue gas dew point, thereby increasing the likelihood of low-temperature corrosion in the air preheater
Changing the air volume during operation alters the excess air coefficient, which enables the steam temperature to be adjusted within a certain range. If the wind volume increases, it reduces the radiation heat transfer within the furnace while increasing the convective heat transfer, thereby causing different variations in the steam temperature for superheaters of different types. However, it is not recommended to use this method to change the steam temperature, as the volume of air flow should primarily be determined based on the requirements of fuel combustion. Low air flow will result in incomplete fuel combustion, reducing the boiler’s thermal efficiency ； And when a larger air volume is used to change the steam temperature, there are many disadvantages as follows: (1) It increases the amount of flue gas, leading to higher heat losses in smoke exhaust and a decrease in the boiler’s thermal efficiency. (2) It increases the power consumption of the supply and exhaust fans, reducing the economic efficiency of the power plant. (3) An increase in flue gas volume and flue gas velocity exacerbates the ash wear on the convective heating surfaces of the boiler. (4) A high excess air coefficient increases the flue gas dew point, thereby increasing the likelihood of low-temperature corrosion in the air preheater.
There is limited practical operating experience; I’m learning about it.
The answers upstairs are all the same; it doesn’t seem to mention any relationship between the air volume and the steam temperature, only some of the negative aspects that arise when the air volume increases.