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Repair Technology of Stainless Steel Reactor after Breakage (Part I)


Release time:

2019-07-25

Stainless steel reactor is an indispensable reaction equipment and storage container for chemical, petroleum, fuel, medicine, fertilizer, rubber, plastic, organic synthesis, food, scientific research and other industries. Its advantages are low cost, corrosion resistance (except hot phosphoric acid, strong alkali), good performance, smooth surface, strong wear resistance and hardness, and wide range of uses. It can be used in various chemical reactions of gaseous, liquid and solid in chemical production, such as evaporation, concentration, distillation, polymerization, chlorination, nitration, saponification, esterification and other technological processes. The disadvantage is that the installation and use should be cautious. Once the glass lining surface is damaged, it becomes an idle equipment that cannot be used, resulting in an increase in the cost of use. stainless steel reaction

Stainless steel reaction kettleIt is a chemical, petroleum, fuel, medicine, fertilizer, rubber, plastic, organic synthesis, food, scientific research and other industries.Reaction equipment and storage vessels may be absent. Its advantages are low cost,Corrosion resistance (except hot phosphoric acid, strong alkali), good performance, smooth surface, strong wear resistance and hardness, wide range of uses. It can be used in various chemical reactions of gaseous, liquid and solid in chemical production, such as evaporation, concentration, distillation, polymerization, chlorination, nitration, saponification, esterification and other technological processes. The disadvantage is that the installation and use should be cautious. Once the glass lining surface is damaged, it becomes an idle equipment that cannot be used, resulting in an increase in the cost of use.Stainless steel reaction kettleAfter the porcelain surface is damaged, stop using it and repair it in time, otherwise it will expand the small problem and become a big problem, which is not easy to repair. Even if it is repaired, the quality and service cycle of the repair will be reduced. In the specific repair, according to different media, different process conditions, different parts of the selection of different repair materials and materials, choose the appropriate repair method.

(1) porcelain surface damage glue repair method. The choice of glue should be considered from the aspects of corrosion resistance, high temperature resistance, bonding firmness, expansion coefficient, etc. The following operation steps shall be strictly followed for glue repair:

① Clean the damaged surface. Before gluing, the damaged surface must be carefully cleaned, and the rust or residue on the damaged surface must be cleaned with an angle grinder, and then use a hand grinder (hand electric drill with a small grinding wheel head) or the iron brush on the angle grinder to make 5mm ~ 10mm wide hemp lines on the edge of the damaged surface, and scrub with ethanol cleaning agent.

② Hang the glue twice. Hang the glue on the damaged surface and fine hemp lines, and hang it evenly at one time, the thinner the better; After that, continue to apply evenly. The glue cannot be too thick. Otherwise, the glue will crack due to temperature rise during use and the repair will fail.

③ Heat and bake the glue hanging part indirectly with a heat source (direct heating is strictly prohibited). Keep the heat source and the glue hanging part above 300mm, or dry naturally for more than 24 hours to ensure the glue surface is solidified.

(2) Equipment perforation repair method. Cover the periphery of the perforated part with wet cloth or wet cotton yarn to prevent the surrounding enamel from being damaged by welding slag. The iron block with the same size and thickness as the perforation part shall be blocked and kept in the same plane, and the spot welding shall be started, and the temperature shall be cooled with water until the welding is completed. Then repair is carried out using method (1).

(3) tantalum nail fixation method. The advantage is that the corrosion resistance is strong, the repair is fast, and the repair is not afraid of bumping. The disadvantage is that it is only suitable for small area repair, not more than 500mm × 500mm. The commonly used tantalum nail is a whole formed by M8 standard tantalum screw and hexagonal plug wrapped with PTFE. There are generally two ways to use:

① Directly fixed with tantalum nails. It is suitable for the parts with less damage to the porcelain surface. Use a Φ6mm/Φ7mm drill bit to drill the center of the damage, tap with an M8 tap, clean the damaged surface and scrub with detergent (ethanol), hang the glue, and screw the tantalum screw on the plug directly into the drill hole until it is tightened.