Normally, heat pipe heat exchangers are widely used in the severe working conditions of waste heat recovery in the petrochemical industry, mainly including severe working conditions such as the production of high-sulfur fuels. In the production process of the petrochemical industry, the very key facilities are high-temperature heating and cracking facilities. Specifically, the high-temperature naphtha cracking furnace selected in the production of small molecule olefins can reach a temperature of 200 ° C to 400 ° C. ℃, and harsh working conditions are also not conducive to the exhaust of exhaust gas formed in industrial production. The air preheating heat pipe heat exchanger can heat the air with the help of the residual temperature of the exhaust gas, so as to play a role in supporting combustion. On the one hand, it can save energy and reduce consumption. On the other hand, it is also beneficial to recover exhaust gas and avoid air exacerbation of the pollution problem. In the current era, the combination of various tube heat exchangers has been widely promoted at home and abroad, so as to achieve good results in energy saving and drainage.
The heat pipe is a heat transfer element with extremely high thermal conductivity, which transfers heat through the evaporation and condensation of the working fluid in the fully enclosed vacuum tube. It has a series of advantages such as extremely high thermal conductivity, good isothermal property, the heat transfer area on both sides of the cold and hot sides can be changed arbitrarily, long-distance heat transfer can be controlled, and the temperature can be controlled. The heat exchanger composed of heat pipes has the advantages of high heat transfer efficiency, compact structure, and small fluid resistance loss. Because of its special heat transfer characteristics, it can control the temperature of the tube wall and avoid dew point corrosion. It has been widely used in metallurgy, chemical industry, oil refining, boiler, ceramics, transportation, textile, machinery and other industries for heat recovery and comprehensive utilization process. The thermal energy has achieved remarkable economic benefits. There are mainly three types:
Air-to-air heat pipe heat exchanger (heat pipe
Air Preheater)
The gas-gas heat pipe heat exchanger is a new type of heat exchanger that absorbs waste heat from the exhausted hot air and then transfers the heat to the cold air, similar to the air preheater commonly used in boilers. Air preheaters, like economizers and superheaters, have become a normal and necessary part of large boilers as a whole. The air preheater speeds up the fuel drying process, reduces ignition difficulties for low-value and wet fuels, and expands the economical combustion of these fuels, while also increasing the overall steam production of the boiler.
Gas-liquid heat pipe heat exchanger (heat pipe economizer)
The gas-gas heat pipe heat exchanger is a new type of heat exchanger that absorbs waste heat from the exhausted hot air and then transfers the heat to the cold air, similar to the air preheater commonly used in boilers. Air preheaters, like economizers and superheaters, have become a normal and necessary part of large boilers as a whole. The air preheater speeds up the fuel drying process, reduces ignition difficulties for low-value and wet fuels, and expands the economical combustion of these fuels, while also increasing the overall steam production of the boiler.
Gas-liquid heat pipe heat exchanger (heat pipe economizer)
Gas-steam heat pipe heat exchanger structure, the heat pipe condensation section is installed in the boiler, the heat pipe evaporation section is inserted into the boiler exhaust duct, heat is transferred through the heat pipe, and cold water is added to 100°C to obtain the required boiling water. The cold water can also be heated into Steam above 100°C.
April 13, 2023
