Q&A on Purification Technology [036]
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Why can the reboiler, located outside the methanol-water separation tower and the regeneration tower, still transfer heat effectively into the towers? Due to the use of natural circulation heating, the tubes inside the heat exchanger are usually above the liquid level, and the temperature of the heat source is higher than the boiling point of methanol. When methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continuously enters the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower. Coalification Region Purification Technology Edition – 2017 Coal Chemical Industry “My Technical Upgrades” Contest (Generous Prizes Available) http://bbs.hcbbs.com/thread-1786290-1-1.html Registration for Chemical Engineers – Experience Sharing Event “Learning from Others’ Experiences” http://bbs.hcbbs.com/thread-1808158-1-1.html
Due to the use of natural circulation heating, the tubes inside the heat exchanger are usually above the liquid level, and the temperature of the heat source is higher than the boiling point of methanol. When methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continuously enters the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower.
Due to the use of natural circulation heating, the tubes inside the heat exchanger are usually above the liquid level, and the temperature of the heat source is higher than the boiling point of methanol. When methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continuously enters the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower.
Due to the use of natural circulation heating, the tubes inside the heat exchanger are usually above the liquid level, and the temperature of the heat source is higher than the boiling point of methanol. When methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continues to flow into the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower
Due to the use of natural circulation heating, the tubes inside the heat exchanger are usually above the liquid level, and the temperature of the heat source is higher than the boiling point of methanol. When methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continuously enters the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower.
Answer: Because of the use of natural circulation heating, the tubes inside the heat exchanger are usually above the liquid level, and the temperature of the heat source is higher than the boiling point of methanol. When methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continues to flow into the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower.
Due to the use of natural circulation heating, the tubes inside the heat exchanger are usually above the liquid level, and the temperature of the heat source is higher than the boiling point of methanol. When methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continuously enters the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower.
Answer: Due to the use of natural circulation heating, the tubes inside the heat exchanger are usually located above the liquid level. The temperature of the heat source is higher than the boiling point of methanol; when methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continues to flow into the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower.
Due to the use of natural circulation heating, the tubes inside the heat exchanger are usually above the liquid level, and the temperature of the heat source is higher than the boiling point of methanol. When methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continuously enters the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower.
Due to the use of natural circulation heating, the tubes inside the heat exchanger are usually above the liquid level, and the temperature of the heat source is higher than the boiling point of methanol. When methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continuously enters the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower.
Due to the use of natural circulation heating, the tubes inside the heat exchanger are usually above the liquid level, and the temperature of the heat source is higher than the boiling point of methanol. When methanol in these tubes is heated, it continuously vaporizes and rises. Since the density of methanol vapor is much lower than that of liquid methanol, this density difference creates a driving force that causes the methanol to keep vaporizing and rising into the tower. The liquid methanol at the bottom of the tower then continuously enters the heat exchanger where it is heated by the steam, thus establishing a natural circulation that ensures continuous heating of the methanol inside the tower.