The overhaul, the work of many complex, extensive field operations, the overhaul content, including the first reactor into the cleanup replacement of the emergency cooling liquid nozzle, replacement of a thermocouple casing, processing the second reaction block material, replacement of the extruder screw bushings, and other important overhaul tasks. Polypropylene workshop started the overhaul program in advance, cooperated with electromechanical instrumentation and other units efficiently, and made the list of overhaul tasks, as well as the project technical transformation, material collection and other preparations to realize the scientific and integrated management of the overhaul work. Polypropylene workshop process, equipment, safety management team from the overall planning, construction design, safety and security in many aspects, strictly implement the company and branch maintenance management regulations.
Since the device parking, the workshop to strengthen the parking process of safety and environmental protection management, strict control of all types of emission indicators, to ensure that the 3 # device pipeline residual material 100% recycling, to achieve "zero-emission" parking. In the maintenance operation, the strict implementation of green environmental protection requirements, so that "gas does not go up to the sky, dust does not fall to the ground, oil is not discharged". In the device parking blowing stage, polypropylene workshop to "zero pollution" as the principle, in the No. 3 device parking before the development of a detailed "three wastes" emissions program, carried out a number of discussions as well as desktop rehearsal, in advance of the program issued to the team, to do all staff multi-angle, The program was distributed to the team in advance, so that all employees could learn the risk assessment contents of each operation from multiple perspectives and in an all-round way. In the blowing site to implement "24 hours a day" monitoring, pay close attention to equipment leakage points, low-point emissions, oil, wastewater, waste discharge to do special fixed-point recovery, to ensure that the maintenance environment clean dead ends.
It is reported that the bag filter S301 cartridge replacement is this clean green overhaul operations in the difficulties, S301 in the number of cartridges, cartridges adhering to the internal fine powder residual triethylaluminum concentration, deactivation is difficult. In the past cartridge replacement process, when opening the S301 head cover and contacting the air, there will always be different degrees of smoke phenomenon, which is a bottleneck problem in the safety and environmental protection overhaul work. The residual triethylaluminum in the system is flammable and explosive, and whether its inactivation effect is complete is the guarantee of overhaul safety. Before stopping, around the 300 unit replacement, deactivation, safety handover and other operational points, polypropylene workshop actively carry out technical research, several special analysis and discussion, optimization of the S301 overhaul process processing program, in addition to the conventional CO2 deactivation treatment, in turn, 4.5% O2/N2 deactivation, plant air mixed nitrogen blowing and other processing steps, from the temperature change, the site exhaust to confirm that complete! After confirming the complete deactivation from temperature change and site exhaust condition, on-site construction work can be carried out. This operation adopts the gradual method of triple gas deactivation, constantly adjusting the amount of carbon dioxide, oxygen and nitrogen added according to the temperature change during deactivation, and closely monitoring the rise of temperature and pressure in the tank, so that the whole process does not produce a trace of smoke. The workshop innovative thinking, 3 # device for the first time to realize the inactivation of smoke, for the safety of green overhaul provides an effective guarantee.
During the overhaul process, the workshop takes "risk control" as the center, strictly implements the principle of HSE management, and insists on "safety shouting" and "safety briefing" before operation. The company strictly implements the HSE management principles, insists on "safety shouting" and "safety briefing" before operation, and grasps each operation link, so that each operation link on the site is always in a controlled state, and effectively avoids the occurrence of accidents such as running, dripping and leaking, material stringing and over-temperature and pressure. They strengthen the safety supervision of operation links, take "zero tolerance, zero violation" as the guideline, strengthen the planning and coordination of overhaul projects, and take targeted precautions through comprehensive JSA safety analysis to control the operation risks in advance and build a solid safety wall. In addition, the workshop management personnel must go to the site before the operation to implement various safety measures, take the irregular inspection mode, the operation of violation of rules and regulations to do immediate investigation and correction, the supervision of the direct operation link high-pressure management, strict control of the operation process of "low old bad" behavior, to ensure that the whole process of operation is safe and under control, and has achieved The high standard and high quality of the overhaul results of "stopping stable, repairing good, open smooth".