Reaction kettle mechanical seal often encounter failure and maintenance, practical is the hard truth!

In the process of the reaction kettle is the comprehensive reaction vessel, the high pressure sealing requirements for container. The sealing effect of the mechanical seal will directly affect the operation of the reaction kettle, serious will cause production, safety accidents and environmental pollution, etc. An immeasurable loss. Katie today show everyone what are the common failure of mechanical seal of chemical reaction kettle, have these trouble how to deal with. The sealing device of the reaction kettle reactor sealed include two types: static seal and dynamic seal. For reaction kettle, usually in the flange and cylinder head flange, nozzle flange, manhole, hand hole, a thermometer to take over, sight glasses, gauges to take over the leak in areas such as the static seal, because the sealing surface is relatively static. Static seal is better solved, commonly used in a variety of forms of static sealing gasket. Stirring shaft and the kettle body gaps between the leak point, due to the rotation of the stirring shaft and the stillness of the kettle body ( On the head) There is relative motion, to prevent leakage of medium must adopt dynamic seal device: mechanical seals and packing seal. Packing: simple structure, convenient operation packing, but due to the packing has some fatal weakness, caused it to short service life, under the condition of the working condition of high parameter ( High temperature and high pressure, high speed and high vacuum conditions) Do not apply. Mechanical seal: mechanical seal is more widely used in the reaction kettle, can according to the specific conditions of the reaction kettle, kettle with mechanical seal for special structural design, material selection, lubrication cooling measures, in order to meet the technological requirements. Compared with soft packing seal, mechanical seal has the following characteristics: sealed in a state of long period operation of sealing is reliable, the leakage rate is small, the general is only 1/100 of the soft packing seal leakage; In the oil, water and medium long service life of the general can reach 1 ~ 2 years or longer, even in the chemical medium usually can reach more than half a year; Mechanical seal friction power consumption is small, the friction power is only 10% ~ 50% of soft packing seal. Reaction kettle structure of the mechanical seal mechanical seal by static ring, ring, elastic element, spring seat, set screw, rotating ring auxiliary seal ring and static ring auxiliary seal components, such as stop pin on the gland to prevent static ring rotation. Ring and static ring can also be based on whether they have axial compensation ability and compensation loop or the compensation loop is called. Ring and shaft rotation together, ring and static ring sealing surface fit closely, in order to prevent the medium leakage. Ring depend on the liquid pressure in the sealed chamber makes it face pressure on the static ring end face, and generate the appropriate pressure on two ring end face and keep a very thin layer of liquid membrane and reach the purpose of sealing. Compression components create pressure, even if the reaction kettle under working state, the face also keep fit, nothing more than to ensure sealing medium leakage, and to prevent debris from getting into the seals. Packing element on the clearance between the axis and seal ring and static ring and the clearance between the gland, the vibration of the elastic element at the same time on the reaction kettle, impact buffer role. Reaction kettle mechanical seal failure and failure and failure reason of mechanical seal parts and the phenomenon of the reaction kettle in the running of the seals frequently wear, cracking, deformation, breakage, and so on and so forth, screw, screw, spring use for a long time will loose, fracture and corrosion. Auxiliary seal ring also can appear crack, distortion and deformation, rupture, and so on and so forth. Fault handling method of mechanical seal parts if fail, you need replacement parts or improve the machining precision of parts, improve the machining precision of the mechanical seal itself and other components the processing precision of the reaction kettle for mechanical seal effect is very good. In order to improve the sealing effect of ring and static ring friction surface finish and flatness requirement is higher. Ring and static ring of the friction surface width is not big, generally between 2 and 7 mm. Mechanical seal vibration, heating the cause of the problem and the cause of the problem and phenomenon in the process of the reaction kettle operation, subject to mechanical wear and chemical erosion, can make the dynamic and static ring joint face rough, dynamic and static ring and sealing cavity gap is too small, leading to vibration caused by pendulum collision. Sometimes because the seals ( Corrosion resistance and) Temperature resistant performance is bad, or insufficient cooling or face when installed with particle impurities, also can cause the vibration of the mechanical seal and fever. To deal with if the ring and static ring and sealing cavity gap is too small, will increase the seal chamber diameter or minimize turning outside diameter, ensure at least 0. 75 mm gap. If is improper friction pair matching, will be more changes to the ring and static ring materials, make its heat resistance, corrosion resistance. This will reduce the vibration of the mechanical seal and fever.