Selection of the heat source for the air separation residue evaporator
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Dear sea friends: I won’t go into detail about the function of the residual liquid evaporator in air separation units (also known as liquid discharge evaporators, steam jet evaporators, etc.). The heat sources I am aware of include low-pressure steam, high-temperature air from the air compressor outlet, electric heaters, natural evaporation through a room-temperature vaporizer, or forced evaporation using a blower. In my opinion, their disadvantages are as follows: The disadvantages of low-pressure steam are that many users do not have access to steam or are unwilling to use it, and icing easily occurs at the steam outlet ； Disadvantages of high-temperature air: It is only suitable for use when the air separation unit stops operating due to reasons other than power issues; using high-temperature air for normal liquid discharge can affect the distillation process. Moreover, if there is a power outage and the air compressor stops, then no high-temperature steam will be available. Disadvantages of natural evaporation: it is highly affected by atmospheric temperature, and its performance is generally poor. Disadvantages of forced steam: suitable only for small air separation units, and highly affected by the blower. Electric heater: Not very clear; please have those who have used it give some advice. Please share your opinions, especially on the evaporation method of electric heaters and their advantages and disadvantages.
We use low-pressure steam, and the vaporization effect is good; however, the method mentioned by the original poster is quite comprehensive.
The use of steam is also greatly constrained by environmental temperature and humidity.
Air-cooled vaporizers are highly affected by atmospheric temperature, which leads to a decline in their vaporization efficiency; installing an axial flow fan alongside them significantly improves the vaporization performance.
5 kilograms of steam will do; I don’t think freezing is possible, haha. Should I increase the amount?
Many water-bath vaporizers use electric heating; they perform very well and are particularly suitable for areas without steam. However, they are generally used for vaporizing products in emergency systems, and rarely for evaporating residual liquids
This post was last edited by prt0683 on 2010-11-27 at 15:00. The evaporation method using an electric heater involves heating water electrically, with the water then causing the low-temperature medium in the tube to evaporate. Advantages and disadvantages: high vaporization efficiency and no interference from external factors, but high power consumption.
Hasn’t everyone used low-pressure nitrogen? We use it
About 5 kilograms of air passing through the molecular sieve is sufficient. Steam is also used to generate electricity; if there’s not enough nitrogen for production, using it for blowing purposes will surely get the factory manager angry
We use 2.5 pressure steam, and freezing has never occurred
It doesn’t matter; it just depends on what is more convenient to use. After all, with heavy drainage, heating cannot be carried out more than twice a year; otherwise, there are problems with the equipment or management. It is best to use steam, as it evaporates more quickly. Although natural evaporation is energy-efficient, leaving a pool of low-temperature liquid somewhere represents a hazard