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Delayed coking method and device

A delayed coking method and coking technology, applied in coking carbonaceous materials, cracking, coking 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., and achieve easy implementation, Ease of secondary reaction and ease of operation

Active Publication Date: 2020-08-04
SINOPEC LUOYANG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] 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

[0151] The heavy coking feedstock oil enters the ultrasonic enhanced reactor, the ultrasonic frequency is 20KHz, the power is 200W, the reaction temperature is 220°C, the reaction time is 15min, and the pressure is 0.2Mpa;

[0152] After ultrasonic treatment, the coking raw oil enters the raw oil buffer tank, and the coked raw oil exiting the raw oil buffer tank enters the convection chamber of the heating furnace, and after being heated to a certain temperature, it enters the group strengthening reactor for reaction. After the high-temperature material is mixed with the coking circulating oil from the coking fractionation tower, it enters the gas-liquid separator for gas-liquid separation. The oil gas from the top of the separator enters the fractionation tower, and the high-temperature heavy oil from the bottom of the separator enters the radiation chamber of the heating furnace for heating ;The high-temperature oil and gas leaving the heating furnace enters the gas-liquid se...

Embodiment 2

[0154] The heavy coking raw oil enters the microwave intensified reactor, the frequency of microwave radiation is 1000MHz, the reaction temperature is 200°C, the reaction time is 10min, and the pressure is 0.1MPa;

[0155] After microwave treatment, the coked feedstock oil enters the feedstock oil buffer tank; the rest is the same as in Example 1.

Embodiment 3

[0157] Pump the heavy coking raw oil at 120°C into the inlet of the throttle orifice cavitation device, and the inlet pressure of the cavitation device is 8MPa;

[0158] After cavitation, the coking feedstock oil enters the feedstock oil buffer tank; the rest is the same as in Example 1.

[0159] 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 coke tower is cooled down. When the coke tower is cooled to normal temperature, open ...

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Abstract

The invention belongs to the field of petrochemical industry and relates to a delayed coking method and device. The delayed coking method comprises the following steps: coking raw material oil entersan external field strengthening reactor for enhanced desulfurization, a material out of the external field strengthening reactor passes through a raw material oil buffer tank and a heating furnace convection chamber, and then enters a group component strengthening reactor for thermal cracking reaction, and a material out of the group component strengthening reactor or a mixture of the material outof the group component strengthening reactor and coking recycle oil from a coking fractionation column enters a gas-liquid separation unit for gas-liquid separation and the like. The delayed coking device comprises the external field strengthening reactor, the raw material oil buffer tank, a heating furnace, the group component strengthening reactor, a first gas-liquid separation unit, a second gas-liquid separation unit, a coke tower, a pumping device and the coking fractionation column. The delayed coking method and device can reduce the sulfur content in petroleum coke, increase the yieldof a liquid product, overcome the problems of environmental pollution caused by the existing high sulfur petroleum coke, poor petroleum coke product quality, and the low yield of the liquid product.

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 means of 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 improve the economy of processing heavy oil in the delayed coking process, prolong 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 p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B55/00C10B57/06C10G9/00
CPCC10B55/00C10B57/06C10G9/00C10G9/002C10G9/005
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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