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Method for delayed coking and device

A delayed coking method and a technology for a coking fractionation tower, which are applied in the directions of coking carbonaceous materials, cracking, coke ovens, etc., can solve the problems of poor quality of petroleum coke products, reduce the sulfur content of petroleum coke, increase the yield of liquid products, etc. The effect of implementation, simple equipment and easy operation

Active Publication Date: 2018-09-28
SINOPEC LUOYANG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Method for delayed coking 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℃, the reaction time is 15min, and the pressure is 0.5MPa;

[0146] After ultrasonic treatment, the coking feedstock oil enters the family-enhanced reactor for reaction, the high-temperature material from the family-enhanced reactor enters the gas-liquid separator for gas-liquid separation, and the oil and gas from the top of the gas-liquid separator enters the coking fractionation tower. The high-temperature heavy oil at the bottom of the gas-liquid separator enters the feed buffer tank of the heating furnace and is mixed with the coking circulating oil from the coking fractionator, and then enters the heating furnace for heating; the high-temperature oil and gas leaving the heating furnace enters the gas-liquid separation tank, and the gas phase leaves quickly and enters the fractiona...

Embodiment 2

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

[0149] After the microwave treatment, the coking feed oil enters the component intensification reactor for reaction, and the rest is the same as in Example 1.

Embodiment 3

[0151] The 390; ℃ coking feedstock oil from the bottom of the vacuum tower of the atmospheric and vacuum unit is pumped into the inlet of the orifice plate cavitation unit, and the inlet pressure of the cavitation unit is 8MPa;

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

[0153] The temperature of the high-temperature steam used in each embodiment is 420°C, and the fraction with the atmospheric boiling point above 470°C at the bottom of the column is extracted as the feed for the coking cycle oil to return to the heating furnace in the fractionation tower. Circulation ratio refers to the weight ratio of circulating oil to fresh feed oil at the bottom of the fractionation tower. After the coke tower is filled with granular coke, the coke removal starts. After small steam blowing for 120 minutes and large gas blowing for 90 minutes, the heavy oil in the tower is fully reacted, and...

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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 field of petrochemical technology, and specifically relates to a delayed coking method and device. Background technique [0002] With the globalization of crude oil resources becoming increasingly heavy and inferior, how to convert heavy oil into light oil with low investment and low operating costs has become an urgent problem for my country's oil refining industry. Delayed coking process has the advantages of strong raw material adaptability, simple process flow, relatively mature technology, and low investment in equipment. It has become one of the important methods for deep processing of heavy oil. [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 yield of coke and the sulfur content in petroleum coke, domestic and foreign researchers have proposed many improved methods. [0004] The PEC technology of Japan Petroleum Energy Compan...

Claims

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Application Information

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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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