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Common Errors In The Manufacture Of Heat Exchanger
- Jul 31, 2017 -

Common errors in the manufacture of Heat Exchanger
(1) confuse the full volume and nominal volume concept, usually the full volume of the device is the Heat Exchanger cylinder and the upper and lower head contains all the space, and the nominal volume is only the corresponding volume of the kettle body jacket, that is, The Obviously the latter is smaller than the former. Typically, the user is required to charge the volume according to the amount of volume, but there are a considerable number of manufacturers interested in the full volume of fool. Users do not care, can take advantage of, users see through, but also pretend misunderstanding, there is a reason to justify. But the harm is the user without knowing, over the loading factor and too much feeding, resulting in Heat Exchanger overload work, the danger is self-evident. The same time as
(2) improper gearbox configuration. Heat Exchanger in the shaft seal requirements of high occasions, such as the use of mechanical seals, should be used to shake the smaller shaft reducer, and some manufacturers will use the relatively low price of the turbine reducer, due to the shaft swing large, Stirring shaft swing, this time, the mechanical seal can not be guaranteed due to failure. Kettle with pressure, the shaft seal leakage even more. If the kettle is flammable, explosive, toxic, corrosive media, the harm can be imagined. The same time as
(3) In order to ensure the stability of the transmission, the base of the Heat Exchanger cover should be platform, often reduced to three-point support, because this structure is thin, poor stiffness. In addition to the use of low-speed kettle, in the commonly used Heat Exchanger is easy to cause the stirring shaft, reducer rack and motor jitter. Resulting in shaft seal failure, material leakage, wear parts of the equipment wear and tear intensified. The same time as
(4) to change the kettle body or heat transfer jacket steel plate, especially the high price of stainless steel plate, this is extremely dangerous. Kettle body pressure strength and stiffness and other performance degradation, can cause equipment explosion vicious accidents. The same time as
(5) reducer chassis is too short, the Heat Exchanger without adjusting the mechanical seal and test the blanket space, replace the mechanical seal wearing parts, the need to remove the reducer and motor, very inconvenient. And slow down the rack is long enough, only to break the test bed, the other do not have to move. Although the short racks save a small amount of manufacturing costs for the manufacturer or the user, the cost of working after the user's maintenance equipment is usually much more than the cost savings. At least for the user, the general ledger or long-term accounts are not cost-effective. The same time as
(6) Heat Exchanger for the material, the head does not press out straight edge, head stiffness decreased, equipment capacity decreased. The same time as
(7) No gear in the middle of the reducer chassis. Stirring shaft swing too large, resulting in shaft seal failure. The same time as
(8) to improve the flange material, Heat Exchanger does not meet the rated load deformation, resulting in flange seal failure. Even if the harmless medium high pressure in the sudden failure of high temperature will have serious consequences, even more harmful media. The same time as
(9) the bottom bearing and reducer rack different shaft, or the mixing shaft and reducer shaft different shaft, resulting in stirring shaft non-strength, swing, the bottom bearing wear and tear due to reduced life and shaft seal failure. The same time as
(10) The inner wall of the Heat Exchanger and the inner part of the kettle are not polished, the inner wall of the kettle is rough, it is easy to rust, scale, and it is difficult to clean the initial or replacement product. The same time as
(11) In order to ensure the strength of the equipment, corrosion resistance and clean the kettle, the cylinder and flange should be inside and outside the double-sided welding, and often be reduced to the outer side of the single-sided welding. The inside of the less welding, the user is not easy to see in appearance, but the reliability of the device down, not welded inside the formation of cracks, the kettle material easy to penetrate, and difficult to clean, infiltration of ingredients usually uncertain, Deep corrosion equipment, after falling off and may contaminate the product.