Low-temperature heat utilization in aromatic hydrocarbon plants
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In aromatic compound production plants, the temperatures at the tops of the extractive and stripping columns in the adsorption separation units are generally above 170°C. Currently, domestic plants use air coolers for this purpose; as a result, not only is the heat generated in this process not recovered, but a large amount of electrical energy is also consumed, leading to high energy consumption in PX production plants. Are there any new technological advancements available for the recovery and utilization of heat at temperatures around 170°C? Let’s discuss it together
The temperature at the top of our toluene tower is 173 degrees; the design by the Petroleum Research Institute specifies that part of this heat be used as a heat source for the bottom of the benzene tower, while the other part is used to generate low-temperature hot water. Low-temperature hot water should be a method for heat recovery.
What is low-temperature hot water used for? What is the specific temperature in degrees?
Here, water is used for low-temperature heat exchange; after recovery, a lithium bromide chiller is added, the central air conditioning system is eliminated, fans are replaced, and electricity consumption is reduced