What is the average specific energy consumption of DCC catalytic cracking units?
Thread Content
Our company is planning to install a new DCC catalytic cracking unit. I would like to know what the energy consumption per unit of processed material is for the DCC units that are currently in operation Please let me know if you know, thank you
If driven well, it’s around 50 kilograms of standard fuel
Reply to 2# Wang Changhua: Impressive, use regular wax accelerant? When DCC operates at the designed liquefied gas yield, its energy consumption is 85 kilograms of standard oil or more, and can even reach 100
Reply to 2# Wang Changhua: It can’t be that low; the energy consumption of a DCC catalytic cracking unit must be quite high. The DCC catalytic cracking unit in our company is designed to achieve a yield of 51% for dry gas plus liquefied petroleum gas.
Daqing Refining & Chemicals (Aditive Plant) has a 120,000-ton/year DCC unit, which is likely not in operation now. Processing Daqing wax oil yields 46% LPG and 20% propylene. The energy consumption is close to 100 (probably the small size of the device is also a factor affecting energy consumption). DCC is divided into DCC-1 and DCC-2; currently, DCC operates primarily in mode DCC-2, taking into account both LPG and gasoline, which may result in a significant reduction in energy consumption. The main reasons for the high energy consumption in DCC are large reaction heat, low vapor pressure, high compression ratio of the compressor, high energy required for separating LPG, lack of recovery of flue gas pressure energy, and excessive low-temperature waste heat, among others. It’s estimated that at least 60 is necessary; a lower value isn’t acceptable. There are certain conditions, and it’s impossible for the value to be low without reason – otherwise, there must be some fraud involved.
What does 60 kilograms of standard oil mean? What is the difference between DCC1 and 2?
DCC-1 is designed for the largest-scale production of propylene (liquefied gas), while DCC-2 is intended for both the production of propylene (liquefied gas) and gasoline.