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Datang Fuxin Coal-to-Natural Gas Gasification Center: Pressure increase in single furnaces of Series A gasification unit to achieve operational capacity Author/Source: Datang Fuxin Coal-to-Natural Gas Date: 2019-10-29 Clicks: 5 At 13:00 on October 27, the gasification unit of Series A at Datang Fuxin Coal-to-Natural Gas Gasification Center used high-pressure air from the air separation unit to increase the pressure in furnaces No. 6 and No. 7, which had passed the initial airtightness tests. In the on-site control room, the supervisor of Team 2 for gasification assigned tasks to the staff; the operators immediately rushed to the large valves for crude gas at Reactors #6 and #7 to stand by, ready to operate the valves at any time ； The mobile team conducts on-site inspections, working in coordination with the control room to monitor the sealing condition of key points in the system ； The control team keeps a close eye on several key indicators such as furnace pressure and temperature, monitoring in real time any abnormalities that occur during the pressure increase process. “\"Open the large valve for connecting the raw gas to the grid; the pressure increase operation begins.\" At this command, the previously tense atmosphere turned orderly as everyone started to take action. Operating the DN400 valve required two employees to work together to open and close it over a period of nearly 30 minutes. As the operation progressed, the pressure reading of the vaporization furnace on the control screen also increased gradually. “\"Pay attention to whether there are any leakage points at the flange connections of Furnaces 6# and 7#.\" Upon receiving this order, the maintenance team rushed to the designated location immediately. \"Report: no abnormalities detected.\" \"Received. Continue increasing the pressure.\" In such a tense yet organized manner, Furnaces 6# and 7# were successfully raised to a pressure of 4.0 MP and maintained that pressure for over an hour. Boilers No. 6 and No. 7 of the Gasification A series have successfully been raised to operational pressure; the system is airtight with no dew point, meeting the production requirements. Behind this achievement lies the silent dedication of the staff responsible for gasification; to ensure the smooth operation of the system’s airtightness, they adopted a working schedule of \"5+2\" and worked round the clock ； They conduct round-the-clock inspections from Furnace 1 to Furnace 8, moving back and forth between the 1st floor and the 6th floor. This requires not only physical effort but also a meticulous mind; they play a key role in developing \"airtightness plans\" and keeping track of all potential air leaks. The pressure increase test was successful, laying a solid foundation for the company to start producing gas at an early date.