Delayed coking method and device

A delayed coking method and coking fractionation tower technology, which is applied in coking carbonaceous materials, cracking, coking ovens, etc., can solve the problems of reducing the sulfur content of petroleum coke, increasing the yield of liquid products, and poor quality of petroleum coke products. Simple, easy-to-implement, and easy-to-operate effects

Active Publication Date: 2020-06-12
SINOPEC LUOYANG TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The first object of the present invention is to provide a delayed coking method, which can reduce the sulfur content in petroleum coke, increase the yield of liquid products, and at least overcome the environmental pollution caused by the existing high-sulfur petroleum coke and the quality of petroleum coke products. Poor, low yield of liquid product technical problems

Method used

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  • Delayed coking method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] The high-temperature vacuum residue from the vacuum tower directly enters the ultrasonic enhanced reactor, the ultrasonic frequency is 20KHz, the power is 200W, the reaction temperature is 390°C, the reaction time is 15min, and the pressure is 0.5MPa;

[0146] After ultrasonic treatment, the coking raw oil enters the group strengthening reactor for reaction, and the high-temperature material coming out of the group strengthening reactor enters the gas-liquid separator for gas-liquid separation, and the oil gas from the top of the gas-liquid separator enters the coking fractionation tower, from The high-temperature heavy oil at the bottom of the gas-liquid separator enters the heating furnace feed buffer tank and mixes with the coking circulating oil from the coking fractionation tower, and then enters the heating furnace for heating; the high-temperature oil gas leaving the heating furnace enters the gas-liquid separation tank, and the gas phase quickly leaves and enters ...

Embodiment 2

[0148] The heavy coking raw material oil from the vacuum tower enters the microwave intensified reactor, the frequency of microwave radiation is 1000MHz, the reaction temperature is 390°C, the reaction time is 10min, and the pressure is 0.4MPa;

[0149] After microwave treatment, the coked raw oil enters the group strengthening reactor for reaction, and the rest is the same as that of Example 1.

Embodiment 3

[0151] The 390°C coking raw oil from the bottom of the vacuum tower of the atmospheric and vacuum unit is pumped into the inlet of the throttle orifice cavitation device, and the inlet pressure of the cavitation device is 8MPa;

[0152] After cavitation; the coking feedstock oil enters the group strengthening reactor for reaction; the rest is the same as in Example 1.

[0153] The temperature of the high-temperature water vapor used in each embodiment is 420° C., and the fraction with a boiling point above 470° C. at the bottom of the column is extracted from the fractionating tower as the feed of the coking cycle oil and returned to the heating furnace. Circulation ratio refers to the weight ratio of circulating oil to fresh raw oil at the bottom of fractionation tower. After the coke tower is filled with granular coke, it starts to decoke. After 120 minutes of small steam blowing and 90 minutes of big air blowing, the heavy oil in the tower is fully reacted, and then the cok...

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Abstract

The invention belongs to the field of petrochemical industry and relates to a method for delayed coking and a device. The method for delayed coking, disclosed by the invention, comprises the steps: depressurized raw oil from a vacuum distillation tower enters an external-field strengthened reactor for strengthened desulfurization, a material from the external-field strengthened reactor enters a clustering strengthened reactor for a thermal cracking reaction, and a material from the clustering strengthened reactor enters a first gas-liquid separation unit for gas-liquid separation; and a gas-phase material separated by the first gas-liquid separation unit enters a coking fractionating tower, a liquid-phase material or a mixture of the liquid-phase material and coking circulating oil from the coking fractionating tower enters a buffer tank, a material from the buffer tank enters a heater for heating, and a material from the heater enters a second gas-liquid separation unit for gas-liquidseparation, and the like. According to the method and the device, the sulfur content of petroleum coke can be lowered, the yield of liquid product is increased, and technical problems, i.e., environmental pollution, poor petroleum coke product quality and low liquid product recovery rate caused by the existing high-sulfur petroleum coke can be overcome.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a delayed coking method and device. Background technique [0002] With the increasing trend of heavy and inferior crude oil resources around the world, how to convert heavy oil into light oil with low investment and low operating cost has become an urgent problem to be solved in my country's oil refining industry. Delayed coking process has become one of the important methods for deep processing of heavy oil due to its advantages of strong raw material adaptability, simple process flow, relatively mature technology, and low equipment investment. [0003] In order to extend the operating cycle of the heating furnace of the delayed coking unit, increase the yield of liquid products, reduce the coke yield and the sulfur content in petroleum coke, domestic and foreign researchers have proposed many improved methods. [0004] The PEC technology of Japan Pet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/04C10B55/00C10G9/00
CPCC10B55/00C10G9/00C10G9/002C10G9/005C10G55/04
Inventor 王龙延王宝石黄新龙王洪彬王少锋经铁李康刘淑芳雷杰刘丹禾
Owner SINOPEC LUOYANG TECH CO LTD
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