Heat exchanger selection issue!
Thread Content
The exhaust gas heat exchanger installed in front of the desulfurization tower results in a flue gas temperature of 300 degrees; I’m not sure which type of heat exchanger would be most effective in this case Corrosion prevention and heat exchange efficiency need to be taken into account
Plate-shell heat exchangers are recommended! Because the temperature is high, the heat transfer coefficient of shell-and-tube exchangers is relatively low
For the medium-temperature range, plate-type flue gas exchangers are recommended
Heat pipe air cooler is the best option, or an air-cooled heat exchanger (the heat exchange tubes and joints need to be coated with enamel for corrosion protection)
A flue gas temperature of 300°C refers to the temperature of the flue gas entering the heat exchanger? If so, heat pipes are a good choice for the heat exchanger to which smoke at a not-high temperature flows in. However, considering corrosion, heat pipes should be made of stainless steel, which increases the cost of the heat exchange tubes.
Plate-shell heat exchangers are recommended! Because the temperature is high, the heat transfer coefficient of shell-and-tube exchangers is relatively low
Plate-shell heat exchangers are recommended! Because the temperature is high, the heat transfer coefficient of shell-and-tube exchangers is relatively low
A economizer made of ND steel can be used, equipped with a steam drum.
It is recommended to consider plate-type gas heat exchangers, which are more suitable for this application scenario: http://bbs.hcbbs.com/thread-544041-1-1.html
The dust content must not be high! Prevent dust from blocking the gas flow channels.