How to deal with tube plate corrosion and fluid leakage in tube heat exchangers
Tube heat exchanger is a type of heat exchanger widely used in chemical production. It has a relatively simple structure, high heat exchange efficiency and strong adaptability. It can also be used under high or low temperature, high or low pressure conditions. It is mainly composed of shell, tube plate, heat exchange tube, head, baffle, etc.
Leakage is
Tube and tube heat exchangerCommon equipment management problems in use are mainly caused by corrosion. A small part of them are due to equipment selection and manufacturing process defects of the heat exchanger itself. There are basically two forms of corrosion: electrochemical corrosion and chemical corrosion. When the equipment is being manufactured, manual arc welding is generally used to weld the tube sheets and tubes. There are varying degrees of defects in the shape of the weld, and the distribution of stress in the weld is also uneven. During use, the tube sheet part is generally in contact with industrial cooling water, and the impurities, chemicals, and microorganisms contained in the industrial cooling water will corrode the tube sheet and welds. This is often referred to as electrochemical corrosion.
When corrosion and liquid leakage occur in tube heat exchangers, the traditional solution is to replace cracked or perforated plates, but the cost of replacing the plates is high. Polymer composite materials are used, which can be constructed on site, avoiding the cost investment caused by equipment disassembly and transportation, shortening the construction time, and extending the service life of the equipment through overall anti-corrosion. This material is a material that resists high temperatures and strong chemical corrosion in immersion environments. It can also be used in working environments that general coatings cannot solve. It can repair and protect various enamel tanks, metal tanks, pipes, and valves to avoid corrosion. This repair technology makes up for the shortcomings of traditional repair welding, offline maintenance, and even component replacement, and can achieve pre-protection to avoid various corrosion problems caused by the use environment, greatly increasing the service life of the equipment.
