Applications of dry adsorption for low-temperature heat energy recovery
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Applications of adsorption-based low-temperature heat energy – Are there any acid production companies in China that utilize adsorption-based low-temperature heat energy? Here, we produce acid from smelting flue gas using a two-stage two-absorption process with a 4132 heat exchange scheme. The first and second stages of absorption employ a high-temperature absorption process. The intake air temperature is around 200 degrees, and plate heat exchangers are used to cool the absorbed acid. Install a circulating water system. I heard that abroad, boilers are used in dry absorption systems to generate steam for power production. The prerequisite is high demands on materials that are resistant to acids and high temperatures. Configured according to the conditions of our factory. For example, the modification involves installing a boiler in the dry absorption system to generate steam for power generation. Whether the conditions are met. Please, experienced **s, share your insights
Reply to 1# zzz2391628: Personally, I think it’s definitely possible. Currently, there isn’t much low-temperature recovery activity in China; it’s mainly used for producing acid gas from minerals (flue gas), but the economic efficiency is relatively low.
You should decide whether to proceed based on your production load; currently you are already using high-temperature absorption, and if you carry out modifications the investment required will be relatively low.
The question is what your flue gas concentration is; if it is too low, the steam yield will be significantly affected by acid crossover.
Use a plate exchanger to cool the absorbed acid? How is the use of plate exchangers? Your facility’s scale can’t be that large; it’s probably around two to three hundred thousand tons. I don’t think there’s much point in recovering that amount of heat energy, and colored metal smelting plants certainly don’t lack steam, right?
Reply to 4# Pop: Over the past one or two years, due to the quality of the mineral feedstock, fluidized bed furnaces have had to handle ores with high levels of impurities, which has prevented an increase in processing capacity. The flue gas concentration is not high, at 4–6%; sometimes additional heating is required for conversion
Reply to 5# justinsoul: Our production capacity is around 200Kt/a, and indeed the steam quality is not comparable to that produced by boiling furnace boilers. If it’s possible to use this steam for our electrolysis. The steam from the boiling furnace is now used for power generation