The foundation for installing heat exchanger safety precautions must be such that heat exchanger safety precautions does not sink or transfer excessive deformation to the connecting pipes of the heat exchanger. The foundation is generally divided into two types: A brick-built saddle-shaped foundation, heat exchanger safety precautions is placed directly on the saddle-shaped foundation without saddle-shaped support, heat exchanger safety precautions is not fixed to the foundation and can move freely as required by thermal expansion. The other one is a concrete foundation, heat exchanger safety precautions is firmly connected to the foundation by anchor bolts through saddle mounts.

The quality inspection and acceptance of the foundation should be strictly carried out before installing heat exchanger safety precautions, the main items are as follows: overview of the foundation surface; Whether the base elevation, planar position, shape, main dimensions and reserved holes meet the actual requirements; Whether the position of the anchor bolts is correct, whether the thread condition is good, and whether the nuts and washers are complete; Whether the surface of the base where the shims are placed is flat, etc.

After the acceptance of the foundation is completed, before installing heat exchanger safety precautions, place shims on the foundation. The surface of the foundation where the shims are placed must be leveled to ensure good contact between the two. The thickness of the shims can be adjusted so that the heat exchanger safety precautions can reach the designed horizontal height. The shims placed can increase the stability of heat exchanger safety precautions on the foundation and transfer its weight evenly to the foundation through the shims. Shims can be classified into flat shims, inclined shims and open shims. Among them, the inclined shims must be used in pairs. There should be shims on both sides of the anchor bolts, and the installation of the shims should not impede the thermal expansion of heat exchanger safety precautions.

heat exchanger safety precautions should be leveled with a level to ensure that the pipes can be connected without force. After leveling, the inclined shims can be welded firmly to the supports, but they must not be welded to the flat shims or sliding plates below. When two or more superimposed heat exchanger safety precautions are installed, the lower heat exchanger safety precautions should be properly aligned and the anchor bolts should be fully secured. Then install the upper heat exchanger safety precautions. heat exchanger safety precautions Before installation, the core should be pulled out for inspection, cleaning, and the sealing surface and baffles should be protected when the tube is pulled out. When moving and lifting the tube bundle, it should be placed on a dedicated supporting structure to avoid damaging the heat exchange tubes.

According to the form of heat exchanger safety precautions, sufficient space should be left at both ends of heat exchanger safety precautions to meet the requirements of conditional (operation) cleaning and maintenance. The fixed head cover end of the heat exchanger safety precautions should have sufficient space for the tube bundle to be drawn out of the shell, and the outer head cover end should also have more than one meter of space for the installation and removal of the outer head cover and the floating head cover.

Sufficient space should be left at both ends of the heat exchanger safety precautions so that the tubes can be pulled out and replaced. And when cleaning the inside of the pipe by mechanical methods. Both ends of the pipe can be scrubbed. The fixed head cover of the U-tube heat exchanger safety precautions should have enough space for the tube bundle to be pulled out, and also have enough space at the opposite end for the shell to be removed.

heat exchanger safety precautions must not be operated beyond the conditions specified on the nameplate. The temperature and pressure drop of the medium in the tube and shell sides should be frequently monitored, and the leakage and scaling conditions of the heat exchange tubes should be analyzed. The heat exchanger safety precautions is to use the tube to make the material inside and outside the heat exchange, cooling, condensation, heating and evaporation processes. Compared with other equipment, the surface area in contact with other corrosive media appears very large, the risk of corrosion perforation and loose leakage at the junction is very high. Therefore, more consideration is given to the anti-corrosion and anti-leakage methods of heat exchanger safety precautions than to other equipment. When heat exchanger safety precautions heats with steam or cools with water, the dissolved substances in the water after heating, The solubility of most substances will increase, while that of calcium sulfate type substances remains almost unchanged. Cooling water is often recycled. Due to the evaporation of water, salts are concentrated, resulting in deposits or dirt. Moreover, due to the presence of corrosive dissolved gases and chloride ions in the water, the equipment is corroded. Corrosion and scaling alternate, intensifying the corrosion of steel. Therefore, cleaning is necessary to improve the performance of heat exchanger safety precautions. As the difficulty of cleaning increases rapidly with the increase of scale layer thickness or deposition, the cleaning interval should not be too long. Regular inspection, repair and cleaning should be carried out according to the characteristics of the production equipment, the nature of the heat exchange medium, the corrosion rate and the operation cycle, etc.

heat exchanger safety precautions can be a single device, such as heater, cooler and condenser, etc; It can also be a component of a certain process equipment, such as the heat exchanger inside an ammonia synthesis tower.

Due to the limitations of manufacturing technology and scientific level, the early heat exchanger safety precautions could only have simple structures, small heat transfer area, large volume and bulky, such as the snake tube heat exchanger safety precautions, etc. With the development of manufacturing technology, a shell and tube heat exchanger safety precautions was gradually formed, which not only has a larger heat transfer area per unit volume, but also has better heat transfer effect, It has long been a typical heat exchanger safety precautions in industrial production.

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