The impact of excessively low coking rate in catalytic cracking on the plant

If the amount of char formed is low, less heat is generated from charring, which may prevent the bed temperature from rising and thus result in a lower reaction temperature as well

Upstairs, \"it’s possible that the bed temperature cannot be raised, which results in a low reaction temperature.\" Does a low reaction temperature increase or decrease anxiety?

In the past, burning oil was used. The blending ratio can now be increased.

It affects the thermal balance, which is ultimately reflected in the bed temperature. There is a lower limit to heat removal from outside, and as a result the bed temperature drops, along with the reaction temperature. However, this situation usually occurs when the feedstock is light, so the demand for cracking heat is also low; in other words, cracking takes place more easily. Therefore, coke formation essentially reaches an equilibrium point.

It primarily affects the thermal balance of the device; the amount of coking produced is lower than what is required for equilibrium, which leads to a reduction in heat within the system. As a result, the reaction temperature falls below the desired level. A low reaction temperature results in less coking due to the cracking of raw materials, creating a vicious cycle.

The amount of coke formed is low, which results in a low bed temperature in the regenerator; this in turn increases the ratio of catalyst to oil. With less coke being produced, the oxygen required for combustion decreases, and it is necessary to reduce the main air flow accordingly. If the main air flow is too low, it can cause difficulties in operating the main fan. A low bed temperature reduces the charring effect and decreases catalyst activity. If a heat extraction system is installed, it will cause fluctuations in steam pressure and temperature.

Excessively low anxiety can affect the thermal balance of the regeneration system, resulting in the heat required for the reaction exceeding the heat supplied by the catalyst cycle in the regenerator. This prevents the reaction temperature from rising, thereby affecting it. However, I believe this is a process that can reach equilibrium; equilibrium is achieved when the external heat extraction load is minimized. Once the reaction temperature drops to a certain level, the feedstock that has not participated in cracking enters the regenerator as a fuel to generate heat, eventually leading to equilibrium. The result of this equilibrium is a low reaction temperature, but only to a certain extent – it does not continue to drop. At this point, the product distribution is poor, the efficiency of external heat extraction is low, and the fluidization effect is also poor. It’s too difficult for the already built devices to consume “fine grains”. So, I have never encountered a situation where light raw materials resulted in low coking. Please correct if it’s inappropriate.