【Haichuan Equipment Guessing Game】What a big quick-heater!

There are many connection ports on the top, @WisdomBright

External heat exchanger core； The inside is water and water vapor, while the outside is a high-temperature catalyst!

What device is the external heat exchanger for?

In the regenerator of the atmospheric residue catalytic cracking unit in refineries, the regenerated high-temperature catalyst flows through the inclined tubes of the external heat exchanger to heat water there and generate steam. It is a heat recovery device

In gas-solid fluidized bed reaction units, such as processes for the regeneration of petroleum hydrocarbon catalytic cracking catalysts, the production of olefins from methanol in a fluidized bed, and the processing of aromatics, it is necessary to control the catalyst temperature, maintain process parameters, and preserve the thermal balance of the system in order to achieve the desired operational objectives and ensure stable operation. The aforementioned catalysts are usually in the form of solid particles. Currently, external heat exchangers are commonly used to regulate the temperature of these catalysts. The existing external heat exchanger is equipped with a heat transfer tube bundle composed of multiple heat transfer tubes, the ends of which all point downward or all point upward. The heat absorption zones of the catalyst are all located below the catalyst inlet. The fluidizing gas distribution device is located at the bottom. To ensure sufficient contact and heat exchange between the catalyst and the heat extraction tubes, a fluidization distributor is typically provided at the bottom of the external heat exchanger to inject a fluidizing medium and keep the catalyst in a fluidized state. However, in order to achieve a sufficient heat exchange area between the catalyst and the heat extraction tubes, these tubes are generally quite long; this necessitates the use of a fluidization medium distributor that requires high injection pressure and consumes a lot of energy in order to fully fluidize the catalyst and keep it in contact with the tubes over almost their entire length. Such a fluidizing medium distributor requires a higher pressure than that which can be provided by the existing fluid pumping equipment in gas-solid fluidized bed reactors; therefore, special pressure enhancement is needed, such as the addition of a booster pump, which further increases energy consumption and costs. Therefore, there is a need for a patented technology involving an external heat exchanger for regulating the temperature of solid particles, which uses a small amount of high-pressure fluidizing medium, features high heat transfer efficiency, and allows for flexible adjustment.