If an indirect quench heat exchanger is designed, what are its key indicators?

Cooling speed, heat conduction efficiency, coking tendency control, fluid distribution uniformity, safety and reliability.

1. The main task of the quench heat exchanger is to quickly cool the high-temperature gas below the target temperature, so one of the key indicators is the cooling speed. The heat transfer performance, fluid velocity and heat exchange area of the heat exchanger should be considered in the design to ensure the rapid and effective reduction of gas temperature.

2. The heat transfer efficiency of the quench heat exchanger directly affects the performance of the heat exchanger. In order to improve the heat transfer efficiency and realize high-efficiency heat exchange, factors such as material selection, heat exchange area and heat exchange tube layout should be considered in the design.

3. In the process of quenching, olefins and steam in cracking gas will react twice, resulting in coking and olefin loss. Therefore, one of the key indicators is to control the coking tendency. In order to reduce coking tendency and ensure normal operation, gas residence time, flow performance and distributor design should be considered in the design.