Problems with the usage of high-pressure nitrogen during the start-up phase of Shell pulverized coal gasification unit
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Please discuss how to save the use of high-pressure nitrogen to the greatest extent during the start-up stage of the Shell pulverized coal gasification unit, so as to avoid the tight use of high-pressure nitrogen during the start-up stage of the gasification unit.
This is mainly a matter of scheduling. He needs to coordinate the nitrogen consumption of each unit. Which unit should be used first and which unit should be used later?
During the driving stage, the amount of nitrogen used is indeed relatively large. At this time, nitrogen can be saved from the following aspects:: 1. Start the pulverized coal preparation unit in advance so that there is enough pulverized coal in V1201 and save the amount of low-pressure nitrogen, at least not from ultra-high pressure to low pressure. ； 2. V1205 is fully equipped with pulverized coal, and the 12-unit program is shut down to save ram nitrogen. ； 3. Do not open the purge nitrogen gas to the annular space too high to ensure that the temperature measuring point of the annular space does not overheat. ； 4. Only open one purge line for each oxygen pipeline to purge nitrogen (enough) ； 5. Keep the pressure of the high-pressure nitrogen buffer tank as high as possible. After using the above method, nitrogen is enough.