Heat exchangers are not pressure vessels.
A heat exchanger is a device that transfers a portion of the heat from a hot fluid to a cold fluid, also known as a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food, and many other industrial productions. They can be used as heaters, coolers, condensers, evaporators, and reboilers in chemical production and are widely used.
Additional Information:
1、 Classification
Classified by heat transfer principle
1. Inter wall heat exchanger is a type of heat exchanger in which two fluids with different temperatures flow in a space separated by walls, and heat is exchanged between the two fluids through heat conduction and convection on the wall surface. There are various types of wall to wall heat exchangers, including shell and tube, jacketed, and others. Inter wall heat exchanger is currently the most widely used heat exchanger.
2. Regenerative heat exchanger transfers heat from high-temperature fluid to low-temperature fluid through a heat storage body composed of solid material. The heat medium first heats the solid material to a certain temperature, and then the cold medium is heated by the solid material to achieve the purpose of heat transfer. Regenerative heat exchangers include rotary and valve switching types.
3. Fluid connection indirect heat exchanger is a heat exchanger that connects two surface heat exchangers with a circulating heat carrier. The heat carrier circulates between the high-temperature fluid heat exchanger and the low-temperature fluid, receiving heat in the high-temperature fluid and releasing heat to the low-temperature fluid in the low-temperature fluid heat exchanger.
4. Direct contact heat exchanger, also known as hybrid heat exchanger, is a device where two fluids come into direct contact and mix with each other for heat exchange, such as a cooling tower, gas condenser, etc.
5. A compound heat exchanger is a device that combines both steam water surface indirect heat transfer and water water direct mixed flow heat transfer. Compared with the steam water surface indirect heat transfer, it has higher heat transfer efficiency; Compared with direct mixing of steam and water for heat exchange, it has higher stability and lower unit noise.
2、 Precautions for use
1. Keep the pipeline clean. Whether before or after work, it is necessary to clean the pipeline network in order to avoid the occurrence of heat exchanger blockage. Also, pay attention to timely cleaning of the dirt remover and filter to ensure the smooth completion of the entire work.
2. Strictly control the softened water. Water quality control is quite important. Before carrying out the treatment of softened water quality, it is necessary to carefully inspect the water and softening tank water quality in the system, and only after confirming that they are qualified can injection treatment be carried out.
3. New system verification. For some new systems, it is not possible to immediately switch use with the heat exchanger. First, the new system needs to be run for a specified period of time to establish an operating mode before the heat exchanger can be integrated into the system for use. The purpose of doing so is entirely to avoid impurities in the pipeline damaging the heat exchanger equipment.
