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Repairing Technology Of Stainless Steel Reaction Kettle After Damage
- Aug 18, 2017 -

Repairing Technology of Stainless Steel Reaction Kettle after Damage
Stainless steel Reaction Kettle is an indispensable reaction equipment and storage container for chemical industry, petroleum, fuel, medicine, pesticide, chemical fertilizer, rubber, plastic, organic synthesis, food, military, scientific research and other industries. Its advantages are low cost, corrosion resistance (in addition to hydrofluoric acid, hot phosphoric acid, alkali), good performance, smooth surface, wear hardness, wide range of uses. Can be used in chemical production in the gaseous, liquid, solid state of various chemical reactions, such as evaporation, concentration, distillation, polymerization, chlorination, nitrification, saponification, esterification process; the disadvantage is to use the installation to be careful, once the glass Surface damage, it becomes impossible to use the idle equipment, resulting in increased use of costs. Stainless steel Reaction Kettle porcelain surface damage to stop using, timely repair, otherwise it will make small problems expand into a big problem, not repair, even to repair, the repair of the quality and use of the cycle will be reduced. In the specific repair, according to different media, different process conditions, different parts of the use of different repair materials and materials, use the appropriate repair method.
(1) porcelain surface damage glue method. The choice of glue from the corrosion resistance, Reaction Kettle high temperature, bonding firmness, expansion coefficient and other considerations. Adhesive to strictly follow the following steps:
① clean the damaged surface clean. Before the glue must be on the damaged surface of a comprehensive and detailed cleaning, the damaged surface of the rust or residue with a grinder clean, Reaction Kettle and then hand grinding machine (hand drill on a small grinding wheel head) or angle grinder on the iron brush Will be broken edge edge enamel out of 5mm ~ 10mm wide hemp, with ethanol or acetone cleaning agent scrub clean.
② two hanging plastic. The first time the glue will be linked to the damaged surface and fine linen, the one-time evenly linked, the thinner the better; Reaction Kettle the second is the first to continue after the completion of uniform smear, glue can not be too thick, otherwise the use of the process Due to the temperature of the plastic cracks caused by repair failure.
③ with the heat source on the hanging parts of the indirect heating baking (no direct heating), heat and hanging parts to maintain more than 300mm, Reaction Kettle or natural drying more than 24h to ensure that the plastic surface solidification.
(2) equipment perforation repair method. Use a damp cloth or wet cotton yarn to cover the perimeter of the perforated area, to prevent the welding slag around the enamel. Will be with the perforation of the size, Reaction Kettle thickness of the iron block to block the hole and keep in the same plane, began to spot welding, and water cooling to welding completed. And then use the method (1) to repair.
(3) Tantalum nail fixation. The advantages of strong corrosion resistance, repair fast, not afraid to bump after the patch. Disadvantages are only applicable to small area repair, Reaction Kettle the maximum does not exceed 500mm × 500mm. Commonly used tantalum nails are M8 standard tantalum screws with outer wrapped tetrafluoroethylene hexagonal plugs formed as a whole. There are two general ways to use:
① directly with tantalum nails fixed. Applicable to the damaged parts of the porcelain surface. Use a Φ6mm / Φ7mm drill to drill holes in the center of the break, grind with the M8 tap, Reaction Kettle then clean the damaged surface and scrub with a detergent (ethanol or acetone), then hang the glue and screw the tantalum screw directly into the hole Until fastened.
② use of PTFE material for corrosion-resistant plate fixed, suitable for larger parts of the damaged surface. The specific repair method is based on the damaged area selection is greater than the damaged area of 2mm ~ 3mm thick polytetrafluoroethylene plate, with Φ6mm / Φ7mm drill bit in the break around to determine the location and number of drilling, Reaction Kettle with M8 tap tapping, and then clean up the damaged surface And scrub with a detergent (ethanol or acetone) and hang the glue. In order to ensure that the surrounding seal, the PTFE rope pressure in the plastic, with tantalum screw will be tightened and then release the PTFE plate, in each nail cap hanging under the glue, wrapped with PTFE rope and then one by one screwed to repair the surrounding glue Squeeze out.
(4) Rivet fixing method. Mainly applicable to irregular round and the largest diameter of 55mm, Reaction Kettle non-perforated stainless steel Reaction Kettle. The specific steps are:
① will be broken surface to do grinding, and then clean.
② with Φ3mm drill bit in the broken point of drilling a hole around 8mm deep.
③ with the hole to expand the hole through the hole wall cross section transverse groove.