For using flue gas to evaporate wastewater, should it be done through direct evaporation or indirect evaporation? !
Thread Content
Flue gas temperature is 90 degrees. Is it to directly evaporate the wastewater, or to heat the wastewater or heat transfer oil and then indirectly evaporate the wastewater (by creating negative pressure for evaporation)? Generally, for high-temperature wastewater evaporation, natural gas is used to generate steam, which is then used to evaporate the wastewater; as a result, the evaporators required are relatively small. If it is steamed directly, one step is omitted, which is an advantage, but the evaporator becomes much larger, which is a disadvantage. Do any of you have any suggestions? !
The flue gas goes directly into the evaporator! Heating the tubes of the evaporator works incredibly well! We have had cases!
Direct evaporation would be better; if the temperature of the exhaust gas remains high, it is possible to consider evaporating the steam first and then concentrating it under reduced pressure.
The efficiency is indeed high, but the evaporator will be quite large.
Direct evaporation yields good results; the size of the evaporator depends on your required evaporation rate
The size of the evaporator depends on your evaporation rate! If a large amount of material needs to be evaporated, the evaporator should be made larger! If the amount of material to be evaporated is small, the evaporator can be made smaller
Direct evaporation is preferable; the temperature and volume of the flue gas determine the size of the evaporator. Actually, if there is a certain wind pressure blowing against the wastewater, then there’s no need to consider an evaporator: lol
First, calculate the temperature at which the flue gas becomes saturated steam, and only then choose the evaporation method.
If conditions permit, it’s better to heat and evaporate directly; using an intermediate step will reduce efficiency