固定管板式换热器专业译文

固定管板式换热器专业译文内容摘要：

shell can not, mechanical cleaning。 The pipe corrosion, together with the shell scrap, the service life of the equipment is low。 In 3, the mechanical design of fixed tube sheet heat exchanger Fixed tube sheet heat exchanger design except for the most critical heat exchanger plate outside, still have two sides, we called the frame plate and the pressure plate frame plate, lateral not movable wall plate, pressure plate heat exchanger plate on the other side of the tie rod bolt to adjust the position of the wall panels can be used。 a plurality of tie rod bolt, used to intensify the frame plate and the pressure plate。 column。 the upper and lower guide rod, connection on the frame plate and between the uprights, used to support and to the pressure plate and the heat transfer piece guide。 the frame plate and the upright post can be installed on the bottom of the soles of their feet, used for fastening machine. In addition, can also have a flange, filter, a thermometer and a pressure gauge and a series of accessories. Heat exchanger classification In two, dividing wall type heat exchanger type Jacket type heat exchanger of the exchanger is arranged in the outer wall of the container jacket made of simple structure。 however, the heating surface by the container wall, heat transfer coefficient is not high. In order to improve the heat transfer coefficient and the kettle liquid is heated evenly, the kettle stirrer. When the jacket cooling water is injected into or no phase change heating agent, also in the clamping sleeve arranged helical baffles or other additional turbulent measures, in order to improve the jacket side heat transfer coefficient heat transfer surface. As a plement deficiency, also can be in the interior of the autoclave fitted snake tube. A clamping sleeve type heat exchanger used in the reaction process of heating and cooling. Submerged coil heat exchanger in this heat exchanger is the metal pipe winding into various and container which is adapted to the shape, and immersed in a liquid contained within the container. The snake tube heat exchanger has the advantages of simple structure, can bear high pressure, corrosionresistant materials available。 the disadvantage is that the liquid in the container turbulent degree low, outer tube heat transfer coefficient is small. To enhance the heat transfer coefficient, the inner container may be mounted stirrer. Spray type heat exchanger this heat exchanger is the heat exchange tube rows over the steel frame, the hot fluid flows in tube, the cooling water from the top shower shower uniformly, so called spray type cooler. Spray type heat exchanger tube is a layer of turbulent degree higher liquid membrane, outer tube heat transfer coefficient more immersive increases a lot. In addition, the heat exchanger is placed in the air flow, cooling water evaporation also take part of heat, can rise to reduce the temperature of cooling water, thereby increasing the heat transfer impetus role. Therefore, and immersion, spray type heat exchanger of heat transfer effect is greatly improved. Sleeve type heat exchanger tube type heat exchanger is posed of different diameter tubes made of concentric sleeves, and by U shaped elbow connected. In this heat exchanger, a fluid inside the tube, another kind of fluid go ring gap, both can get a higher flow rate, the heat transfer coefficient. In addition, in the casing heat exchanger, two kinds of fluid for pure countercurrent, logarithmic mean driving force of the larger. Casing heat exchanger has the advantages of simple structure, can withstand the high pressure, the application is convenient ( may need to increase or decrease the number of tube sections ). Especially due to casing heat exchanger at the same time with a large heat transfer coefficient, heat transfer of large driving force and can bear high pressure and strong advantages, in the super high pressure process (such as operating pressure of 3000 high pressure polyethylene production process ) used in the heat exchanger is almost entirely sleeve type. Plate heat exchanger is the most typical shellandtube heat exchangers, its application in the industry has a long history, and is still in the dominant position in all heat exchanger. The main structure prises a heat exchanger plate and plate between the adhesive tape. In the longterm market dominant position, but the large volume, low heat exchange efficiency, to replace the rubber strip is expensive ( tape replacement costs about the process of 1 / 31 / 2 ). Mainly used in liquid liquid heat transfer between the industry, often referred to as water water heat exchanger, the heat transfer efficiency of 5000W / . In order to improve the pipe and fluid heat transfer coefficient, usually installed in a shell body of a certain number of transverse baffle plate. Baffle plate not only can prevent the short circuit flow, increasing the fluid velocity, forcing the fluid in accordance with the provisions of the path many times wrong flow through the tube bundle, which gr。