US 11,946,003 B2
System and method for producing needle coke
Dan Guo, Liaoning (CN); Xiangchen Fang, Liaoning (CN); Kai Qiao, Liaoning (CN); Renqing Chu, Liaoning (CN); Lianzhong Gou, Liaoning (CN); and Tianzuo Chen, Liaoning (CN)
Assigned to CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SINOPEC DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS.CO., LTD., Liaoning (CN)
Appl. No. 17/758,262
Filed by CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SINOPEC DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS CO., LTD., Liaoning (CN)
PCT Filed Dec. 3, 2020, PCT No. PCT/CN2020/133569
§ 371(c)(1), (2) Date Jun. 30, 2022,
PCT Pub. No. WO2021/135802, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 201911423745.8 (CN), filed on Dec. 31, 2019.
Prior Publication US 2023/0038156 A1, Feb. 9, 2023
Int. Cl. C10G 69/06 (2006.01); C10B 41/00 (2006.01); C10B 55/00 (2006.01); C10G 9/00 (2006.01)
CPC C10G 69/06 (2013.01) [C10B 41/00 (2013.01); C10B 55/00 (2013.01); C10G 9/005 (2013.01); C10G 2300/4012 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A system for producing needle coke, comprising:
a coke tower provided with a feedstock inlet and an oil gas outlet, wherein a hydrocarbon-containing feedstock is reacted to produce the needle coke and an oil gas in the coke tower;
a pressure stabilization tower provided with an oil gas inlet, an overhead light fraction outlet, a bottom oil outlet and a cycle oil inlet, wherein the oil gas from the coke tower is received and separated into an overhead light fraction and a bottom oil, and a pressure controller is provided at a top of the pressure stabilization tower for adjusting the pressure at the top of the pressure stabilization tower;
a buffer tank provided with an inlet, a first bottom oil outlet, and a second bottom oil outlet, for receiving the bottom oil from the pressure stabilization tower; and
a coking fractionation tower provided with an inlet, a light oil outlet and a heavy oil outlet, wherein a bottom oil from the buffer tank is received and separated into a light oil and a heavy oil;
wherein the oil gas outlet of the coke tower is in communication with the oil gas inlet of the pressure stabilization tower through a pipeline, and no pressure controller for adjusting the pressure at the top of the coke tower is provided in the coke tower or on the oil gas pipeline connecting the coke tower to the pressure stabilization tower,
the inlet of the buffer tank is in communication with the bottom oil outlet of the pressure stabilization tower, the first bottom oil outlet of the buffer tank is in communication with the cycle oil inlet of the pressure stabilization tower through a pipeline with a temperature adjuster provided thereon, and the second bottom oil outlet of the buffer tank is in communication with the inlet of the coking fractionation tower, and
optionally, the heavy oil outlet of the coking fractionation tower is in communication with the feedstock inlet of the coke tower.