The maintenance and protection of heat exchanger

Heat exchanger will have problems in the use of the process, also need to repair, especially seals it, to see if it is loose. Xiao Bian will introduce the matters needing attention when the maintenance of plate heat exchanger:
Heat exchanger is a process of industrial equipment in heat exchange technology is an important part in. An elastic sealing gasket which is sealed between each plate heat sink is a vulnerable part, and is also a kind of easy ageing part under natural condition. Its service life has an important influence on the service life of heat exchanger. If these seals are hardened, the elasticity of the former can be lost, and the heat exchanger can not work properly.
Elastic gasket softening associated with pressure and temperature, when the gasket loses its elasticity, the heat exchanger will leak. In some of the products, in order to solve the leakage phenomenon caused by the aging of the gasket, allowing the heat exchanger sealing performance adjustment, namely again combined heat exchanger tightening bolt, pressing force adjusting each heat exchanger between the elastic sealing pad, solve the leakage problem. The function of the heat exchanger on the nameplate, generally gives maximum and minimum stress. For the new heat exchanger, the minimum allowable stress should be used for connection and fixation. As each film heat exchanger number can be one or more times to adjust the heat exchanger tightening force, every time when tightening the nut can be screwed in the 3mm, and in the process of tightening the adjustment sheet always pay attention to the stress, and is only allowed to heat exchanger without working pressure, tightening force under the condition of room temperature adjustment, prevent leakage.
There is no heat exchanger produced the stress range of adjustment in the nameplate, general stress values are given in the drawing, in this kind of screw plate heat exchanger, tightening torque in any case should not be less than the numerical drawing, because the assembly quality, assembly and deformation of plate heat exchanger. When the tightening torque is required to achieve a specified number of values, the flexible sealing gasket can be replaced with a planned way. The heat exchanger used in important production equipment and corrosive medium, suggesting that a set of spare seals. The warehouse temperature of 18 DEG C, the transparent plastic packaging, sealing plate heat exchanger can be preserved for 3 years.
Sealing element fixing
In principle, the fixed parts of the seal are divided into two categories: fixed and non adhesive bonding. The shape of the seal should be consistent with the shape of the seal plate heat exchanger. It must be pointed out that the adhesive fixed method does not have any effect on the sealing function.
Non adhesive seal
Align: place the sealing ring in place.
Place in: the sealing ring is correctly entered into the sealing groove.
Compression: in the sealing groove, the groove structure of the cross section is gradually reduced, so that the sealing ring is positioned correctly.
Adhesive seal
According to the purpose of sealing gasket and sealing quality requirements, can be used in different manufacturers of mixed sealant and non - harmonic sealant. Prior to bonding, steam flow should be used to completely remove residual adhesive and residual seal. For sealing adhesive to reconcile, must be combined with the adhesive residue on the surface of the gasket and the residual burn as heat exchanger. Bonding in large quantities, the pool should be prepared to seal the liquid nitrogen frozen, ready for the heating furnace with a plate heat exchanger gasket for drying, heating temperature should be 160 degrees, if there are conditions, chemical cleaning with heat exchanger, in order to ensure the elimination of residual combined gasket bonded joints in plate type heat exchanger