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Reaction Vessel Maintenance and Repair Procedures

2021-03-10View Original

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Integrity standards: 1. Parts and components: a. The reactor body (including the internal lining layer), as well as the components related to transmission, stirring, sealing, etc., are complete and in good condition, with quality meeting the required standards. b. Pressure gauges, thermometers, safety valves, rupture disks, level gauges, automatic control devices, etc., are complete, sensitive, and accurate, and are regularly calibrated. c. The foundation and base are stable and reliable; the bolts are tightly fastened and properly aligned, meeting the technical requirements. d. Piping, fittings, valves, and supports are installed properly and firmly, with clear markings. e. The anti-corrosion, insulation, and anti-freezing facilities are complete and effective. f. The safety valves and the discharge pipes of explosion-proof devices on vessels containing flammable or toxic media must be installed in accordance with relevant regulations. 2. Operational performance a. The equipment’s lubrication system is clean and unobstructed, with proper lubrication. b. When the idle disk rotates the stirring shaft, there is no noticeable uneven weight or swinging, and no impact sounds are heard between the components. c. No noise or abnormal vibration during operation. The temperatures, pressures, rotational speeds, flow rates, currents, etc., of various components are within the specified ranges. The temperature of rolling bearings should not exceed 70°C, and the temperature of sliding bearings should not exceed 65°C. d. The production capacity reaches the value indicated on the nameplate. 3. Technical documents: a. Complete equipment records, including product certificates of conformity and user manuals. b. The maintenance and inspection records are complete. c. Running time and cumulative running time are statistically tracked and recorded. d. There are assembly drawings and drawings of vulnerable components. e. The operating procedures and maintenance rules are complete. f. The pressure vessel documentation is complete and complies with relevant regulations. 4. Equipment and environment a. The work area is clean, and the equipment appears in its original color. b. The statistics of dynamic and static sealing points are accurate, with no leaks or losses. Equipment maintenance 1. Daily maintenance a. Regularly check the reactor vessel and its components for any signs of deformation, cracks, corrosion, etc. Keep the assembly tight without any looseness, and ensure the conveyor belt is properly tensioned. b. Keep the lubrication system clean and unobstructed; apply lubricant or grease at the locations indicated in the lubrication chart, and strictly adhere to the \"five fixed principles\" and \"three-stage filtration\" requirements. c. Start and stop the operation in accordance with the procedures, and carefully control various process parameters such as pressure, temperature, flow rate, time, speed, and material ratios; operating under conditions of excessive temperature, pressure, or load is strictly prohibited. d. Keep the coolant of the sealing device clean and unobstructed, ensure its temperature is within the required range, and maintain good sealing performance. e. Eliminate leaks, spills, and other losses promptly. f. Keep the surrounding area clean, and ensure the equipment shows its original color. g. Perform maintenance on the equipment after it has been parked. 2. Regular inspection items 3. Methods for dealing with common faults 4. Emergency shutdown: An emergency shutdown must be carried out when any of the following abnormal conditions occur: a. The operating pressure of the reactor, the temperature of the medium, or the wall temperature exceeds the allowable values, and effective control cannot be achieved despite taking measures ; b. The main pressure-bearing components of the reactor develop safety-threatening defects such as cracks, bulging, deformation, or leaks; c. The safety accessories fail ; d. Damage to the connectors and fasteners, making it difficult to ensure safe operation ; e. In the event of accidents such as fires, which directly threaten the safe operation of the reaction vessel ; f. Excessive feeding ; g. The liquid level gets out of control, and measures taken fail to bring it under effective control ; h. Severe vibration occurs between the reactor and the pipelines.

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