Since August 18th, the first phase of air separation, gasification and purification has been stopped successively. On September 22nd, the second set of air separation, gasification and purification was put into operation, which lasted more than a month, and the overhaul tasks were successfully completed. On September 25th, the whole system was fully loaded.

In ORDER TO ensure that the annual overhaul plan is completed safely, HIGH quality and efficiently, the production department has organized various departments and workshops to hold special meetings for many times to determine the plan, carefully deploy every work of the overhaul, and formulate a detailed opening and stopping plan. With THE replacement OF the torch head and platform of the torch system, the replacement of the catalyst and inner parts of the ammonia plant and the completion of the maintenance work of several long-term projects, such as the anti-corrosion of the urea granulation tower, it indicates the end of the annual overhaul. According to the completion time node of each maintenance project, on September 2, the point furnace of thermal power plant steam supply, steam pipe network heating pipe, gasification C furnace oven; On September 8, the gasification C furnace was fed, the second stage purification was started, the combined alkali system was started, the first and second stage synthesis production, the second stage polyol, neopentyl glycol, compound fertilizer were also opened; On September 14, the third-stage synthesis began to be reduced by heating. On September 22, the gasification furnace A was fed, and the first-stage purification was started. The whole process of the system was opened up. The first-stage production of polyol was ramped up, and the low-pressure methanol was started, and the third-stage synthesis was transferred to normal production. On September 25, the gasification dual system production at full capacity, ahead of schedule to return to normal production level, the annual overhaul achieved a complete success.

Through this overhaul, the production capacity of the three sets of synthetic devices has been maximized, the hidden dangers of the air separation device and the torch system have been eliminated, the whole body care has been done for the production system, and the hardware guarantee has been provided for the long-term stable operation of the device.