A protection method for corroded system equipment in the sulfur melting process

Abstract

The invention discloses a method for protecting system equipment corroded in a sulfur melting process, which is suitable for inner surface corrosion resistance of sulfur melting new engineering equipment, and belongs to the technical field of corrosion and protection. The method comprises the following steps: (1) substrate surface treatment: cleaning the substrate surface of equipment such as a rapid sulfur melting groove and storage groove of a sulfur melting system, performing mechanical-grinding derusting to a grade St3 or performing sand-blasting derusting to a grade Sa3 standard, and cleaning the substrate surface with a cleaning agent; (2) primer transition: painting the treated substrate surface with a modified epoxy organic silicon heat-resistant primer; (3) corrosion-resistant isolation: after the primer is fully cured, scrapping modified epoxy organic silicon heat-insulating glass scales in batches to a corresponding thickness; (4) finish paint enclosing: after the glass scales are fully cured, painting with modified epoxy organic silicon heat-resistant finish paint for enclosing. By treating with the protection method, equipment corroded in the sulfur melting process is repaired, and the service life of the equipment is prolonged.

Description

technical field [0001] The invention belongs to the technical field of corrosion and protection, and relates to a protection method for corroded system equipment in the sulfur melting process. Background technique [0002] Corrosion science is an emerging marginal subject. During corrosion, a chemical or electrochemical multiphase reaction occurs on the interface of the metal, which turns the metal into an oxidized (ion) state. This will significantly reduce the mechanical properties of metal materials such as strength, plasticity, and toughness, destroy the geometry of metal components, increase wear between parts, deteriorate electrical and optical physical properties, shorten the service life of equipment, and even cause disasters such as fire and explosion. sex accident. According to incomplete statistics from developed countries, the annual direct loss due to corrosion accounts for about 1-4% of the gross national value, and the steel loss due to metal corrosion accoun...

AI Technical Summary

Problems solved by technology

Therefore, under such environmental conditions of high temperature and strong corrosion, the selection and quality of anti-corrosion materials are difficult to guarantee, and in the production process, mechanical stirring makes the materials rotate to form eddy currents, and the solid sulfur contains a certain amount of impurities. After melting, the impurities in the body will naturally come out. Under the action of the continuous rotation of the stirring device, the impurities will form into solid particles or even slowly form cobblestones, which will cause strong erosion and abrasion on the inner surface of the tank, and eventually lead to corrosion, perforation, leakage and shutdown.

[0004] At present, the anti-corrosion method for the corroded system equipment in the sulfur melting process is: the heating coil in the sulfur melting system equipment is usually wrapped with water glass impregnated asbestos rope, which can achieve a better anti-corrosion effect, but using water glass The heat transfer effect of the impregnated asbestos rope wrapping method is not good, and it is easy to cause insufficient heating temperature, which makes the sulfur melting effect not good; for the tank wall, the anti-corrosion method of pasting glass fiber reinforced plastic is usually used, but the glass fiber reinforced plastic is hard and brittle after solidification, and the stirring blade is constantly In the case of rotation and constant erosion and friction of pebbles, it is easy to cause glass damage and even lift up the entire anti-corrosion layer, resulting in corrosion, perforation, leakage and downtime. If effective measures are not taken in time to remedy, it will expand from a small hidden danger to a big paralysis. Finally lead to the scrapping of sulfur melting system equipment