【Q&A】Catalytic Coking Reformate Blending Version 20170812
Thread Content
What is the definition of delayed coking? Answer: The residue flows at a high velocity through the tubes of the heater, where it is heated to the temperature required for the reaction (500–505°C). After that, it enters the coke tower, where it undergoes cracking and condensation reactions thanks to the heat it carries with it. Although the hot residue oil reaches the reaction temperature inside the furnace tubes, its high flow rate results in a very short residence time; as a result, the cracking and condensation reactions do not have enough time to occur before the oil leaves the heater, and these reactions are delayed to take place in the coking tower – which is why it is called delayed coking. http://bbs.hcbbs.com/static/image/hrline/4.gif Petrochemical sector — New ideas for energy savings: the “Creative Thinking” campaign (the second phase is in full swing) http://bbs.hcbbs.com/thread-1666758-1-1.html “My Technical Upgrades” in the coal chemical industry in 2017 http://bbs.hcbbs.com/thread-1786290-1-1.html [Daily Question] Summary post for 2017 on catalyst-based coking and reformed oil blending http://bbs.hcbbs.com/thread-1811219-1-1.html [Q&A] Summary post for 2017 on catalyst-based coking and reformed oil blending http://bbs.hcbbs.com/thread-1826018-1-1.html
The residue flows at a high velocity through the tubes of the heating furnace, where it is heated to the temperature required for the reaction (500–505°C). After that, it enters the coke tower, where it undergoes cracking and condensation reactions thanks to the heat it carries with it. Although the hot residue oil reaches the reaction temperature inside the furnace tubes, its high flow rate results in a very short residence time; as a result, the cracking and condensation reactions do not have enough time to occur before the oil leaves the heater, and these reactions are delayed to take place in the coking tower – which is why it is called delayed coking.
Delayed coking is a process in which residue undergoes deep thermal conversion at higher reaction temperatures and over longer reaction times, resulting in the production of coking gases, coking gasoline, coking diesel, heavy distillates (coking wax oil), and petroleum coke.
Delayed coking is a secondary petroleum processing technique that involves using hydrogen-poor heavy oils as raw materials to carry out deep thermal cracking and condensation reactions at high temperatures (around 500°C), in order to produce rich gas, crude gasoline, diesel, wax oil, and coke
Delayed coking involves the deep cracking of feedstock over a prolonged reaction time, with the main objective of producing solid petroleum coke, while also yielding gaseous and liquid products. The raw material used in delayed coking is mainly high-boiling-point residue oil. The main operating conditions for delayed coking are: the temperature of the feedstock after heating is around 500°C, and the coke tower operates under a slight positive pressure. Changing the raw materials and operating conditions can adjust the proportions of gasoline, diesel, cracking feedstock oil, and coke.
Its main purpose is to convert residual oil with high carbon residue into light oils. The device used can operate in a cyclic manner, that is, the heavier fractions from the coking distillates of heavy oil are used as circulating oil and remain in the device for a longer period of time.
The residue flows at a high velocity through the tubes of the heating furnace, where it is heated to the temperature required for the reaction (500–505°C). After that, it enters the coke tower, where it undergoes cracking and condensation reactions thanks to the heat it carries with it. Although the hot residue oil reaches the reaction temperature inside the furnace tubes, its high flow rate results in a very short residence time; as a result, the cracking and condensation reactions do not have enough time to occur before the oil leaves the heater, and these reactions are delayed to take place in the coking tower – which is why it is called delayed coking.
Delayed coking involves the deep cracking of feedstock over a prolonged reaction time, with the main objective of producing solid petroleum coke, while also yielding gaseous and liquid products. The raw material used in delayed coking is mainly high-boiling-point residue oil. The main operating conditions for delayed coking are: the temperature of the feedstock after heating is around 500°C, and the coke tower operates under a slight positive pressure. Changing the raw materials and operating conditions can adjust the proportions of gasoline, diesel, cracking feedstock oil, and coke.
Delayed coking is a secondary petroleum processing technique that involves using hydrogen-poor heavy oils as raw materials to carry out deep thermal cracking and condensation reactions at high temperatures (around 500°C), in order to produce rich gas, crude gasoline, diesel, wax oil, and coke.
A thermal cracking process. Its main purpose is to convert residual oil with high carbon residue into light oils. The device used can operate in a cyclic manner, that is, the heavier fractions from the coking distillates of heavy oil are used as circulating oil and remain in the device for a longer period of time.
Delayed coking involves heating heavy oil in a heater to the coking temperature (490–500 degrees). To prevent the oil from coking inside the furnace tubes, water is injected into these tubes to facilitate rapid flow of the oil, thereby delaying the coking process until it occurs in the coking tower; hence the name delayed coking.