Low-temperature methanol washing, carbon dioxide separation tower, increasing pressure – what are the effects on the system after operation?
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The original design called for operation at atmospheric pressure; now, the absorption tower is operated at 0.34 MPa in order to produce 3 kilograms of carbon dioxide for use in the alkali plant, without the need for a carbon dioxide compressor, thus saving high-pressure drive steam. What impact does it have on the low-temperature methanol washing system?
High pressure makes resolution difficult, resulting in a reduced amount of carbon dioxide being resolved and an increase in carbon dioxide in the solution.
Why is the carbon dioxide content in the acidic gas from Klaus high?
The system temperature rises, which requires an increase in the power of your chillers; the load on the heat regeneration tower increases, as does the amount of methanol circulating. Calculate whether it’s cost-effective
What are the reasons for the increased load on the thermal regeneration tower?
Increasing the operating pressure in the CO2 separation tower will result in: ① A decrease in the volume of CO2 product gas； ②Increased exhaust volume ； ③The nitrogen amount removed by stripping has increased compared to before ； ④External cooling supply has increased slightly. Overall, there are many CO2-based products, and both CO2 and exhaust gases are used as feed gases and cooling media; therefore, there is no major issue with increasing the CO2 desorption pressure. However, if the exhaust gas and CO2 are not used entirely as cooling media for the feed gas, additional external cooling will be required.
I’m not aware of the upstream and downstream processes involved by the poster; personally, I think such an approach is not worth the costs
The manager insisted on doing it; he’s very capable. As a result, the steam consumption of the low-temperature methanol wash refrigerators increased by three tons. The carbon dioxide content in the acidic gases sent to sulfur recovery was high, which required additional natural gas and pure oxygen to be used. Personally, I don’t think it’s very meaningful. The original carbon dioxide compression already has low power, producing just over 6 tons of steam.