【Daily Question】April 26, 2016: Participation = +2 wealth； +3 to 8 wealth for correct answers
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To increase the popularity of the purified area, a \"One Question per Day\" campaign was launched to foster an active atmosphere for technical exchanges while providing members with certain financial rewards. (Freedom sailors, if you have any good questions, feel free to send them to me; let’s work together.) 【Daily Question】 (Fill-in-the-blank) The cooling capacity required in the methanol washing process comes from: ( ), ( ) and ( ). Reply with your answers in the comments; you will receive +2 wealth points for participating in the quiz. If you answer all questions correctly, you’ll get an additional +3 to +8 wealth points. Those who provide thorough analyses and explanations for the questions—or detailed calculation processes—will receive extra wealth points as a reward. If your answers are correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions. Propylene evaporation, water cooler, and CO2 desorption
First, cooling capacity is provided through the regulation of three water coolers. Second, cooling capacity is provided through the regulation of three ammonia coolers. Third, by adjusting the amount of nitrogen stripped from the bottom of the hydrogen sulfide concentration tower, the cooling capacity provided by the separation of carbon dioxide and hydrogen sulfide is altered in order to balance the system’s cooling demand.
1) The ammonia refrigeration system provides the cooling capacity for liquid nitrogen supply； (2) The cooling capacity generated after flash evaporation and stripping of high-pressure methanol rich in CO2 ； (3) The cooling capacity provided by the water cooler.
Water-cooled, ammonia-cooled, and fractional distillation tower pressure-reduced flashing
The cooling capacity released by the desorption of CO2 gas from rich methanol is the main source of cooling capacity for low-temperature methanol washing, along with circulating water and refrigerators.
The cooling capacity for the methanol washing process comes from: (recirculated cooling water), (evaporation of low-pressure liquid ammonia), and (the excess cooling capacity provided by low-temperature liquid nitrogen)
Tazhong cooler. Top exhaust partial reflux and heat exchanger. The top of the tower produces exhaust gas with a sulfur content that meets environmental regulations. The exhaust gas is heated through heat exchange with the feed gas, and then washed with water in a water scrubber to recover methanol; part of the exhaust gas provides cooling capacity for the nitrogen stripping process.
(1) The ammonia refrigeration system provides the cooling capacity for liquid nitrogen supply； (2) The cooling capacity generated after flash evaporation and stripping of high-pressure methanol rich in CO2 ； (3) The cooling capacity provided by the water cooler.
The circulating cooling water, low-temperature air, and liquid ammonia supplied by the refrigeration plant evaporate in the ammonia evaporator
Refrigerant evaporation, water cooler, and CO2 desorption
Circulating cooling water, low-pressure liquid ammonia evaporation, low-temperature liquid nitrogen for removing excess cooling capacity