The reboiler will not heat up
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What are the reasons why the reboiler cannot be heated by steam? Could factors such as heat agent pressure and temperature, reboiler scaling, and faulty traps be the cause of non-condensable gases in the steam?
There are various reasons for insufficient heating: 1. Quality of steam 2. Condition of the reboiler (dirt, design) 3. Condition of the trap 4. Flow rate of the medium being heated
Non-condensable gases in the steam are also an issue; they should affect the heat transfer area. But generally, it should have a vent valve, right?
There are numerous reasons why heating doesn’t work properly: 1. The quality of the steam, with the presence of non-condensable gases； 2. Condition of the reboiler (fouling of the tubes by the material flowing through them, limited heat exchange area due to design reasons). 3. Condition of the drain system: Water accumulation reduces the heat exchange area ； 4. For reboilers in which steam alone is not sufficient to completely vaporize the material inside them, it is necessary to take into account the circulation of the material within the reboiler tubes; when needed, a forced circulation pump should be used ； 5. Reasons such as an empty reboiler! !
When the thermometer is functioning properly, consider the mass of steam.
“What are the reasons why the reboiler cannot be heated by steam? Could factors such as heat agent pressure and temperature, reboiler scaling, and faulty traps be the cause of non-condensable gases in the steam? ”Non-condensable gases in steam are generally very scarce. If non-condensable gases are present, they can be vented through the exhaust valve at the beginning of operation.
The exhaust valve I saw is the same as that non-condensable gas discharge device used in steam traps. It shuts off automatically when the temperature is high, and turns on again when the temperature is low. Exhaust. There is a little waste, but the result is good.
In addition to the reasons mentioned above, other factors such as changes in the composition of the material inside the tower should also be considered when the reboiler cannot provide sufficient steam heating; a high content of heavy components can also lead to insufficient heating.
1# Wolfsen: There is no steam flow, either because the flow rate of the material being heated is too high. According to the first law of thermodynamics, energy is conserved – it cannot disappear without a reason