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Test method for on-line circulation of delayed coking cycle oil

A delayed coking and test method technology, applied in the field of delayed coking test equipment, can solve the problems of low test efficiency and high labor intensity, and achieve the effects of reducing labor intensity, reducing workload and improving efficiency

Inactive Publication Date: 2014-10-15
LUOYANG PETROCHEMICAL ENG CORP SINOPEC +1
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Problems solved by technology

By this method, the shortcomings of low test efficiency and high labor intensity of the existing delayed coking test device can be overcome. A test method for online circulation of delayed coking circulating oil provided by the present invention can complete one operating condition within 3 to 5 days. (Circulation ratio, furnace outlet temperature, coke tower top pressure, water injection volume, etc.) test, the efficiency is increased by more than 10 times

Method used

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  • Test method for on-line circulation of delayed coking cycle oil
  • Test method for on-line circulation of delayed coking cycle oil
  • Test method for on-line circulation of delayed coking cycle oil

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Process description: The feed is 4.26kg / h of 120°C heavy oil I (properties are listed in Table 1) through pump pressurization with 2.93kg / h of 270°C circulating oil and 2g / min of 345°C water from the bottom of the fractionation tower After the steam is mixed, it enters the heating furnace for heating. The material temperature at the outlet of the heating furnace is controlled to be 495°C, and then enters the coke tower for cracking and condensation reactions under a pressure of 0.17MPa. The generated coke remains in the coke tower, and the high-temperature oil and gas coming out of the top of the coke tower enters the fractionation tower for separation. 20g / min of 360°C water vapor is blown into the lower part. After fractionation, the mixed oil gas and non-condensable gas (rich gas) of gasoline, diesel and coker wax oil come out from the top of the fractionation tower, and then are condensed, cooled, recovered and metered; The inlet to the furnace is mixed with fresh ...

Embodiment 2

[0039] The process description is the same as in Example 1, and the process conditions when the circulation ratio is 0.506 are shown in Table 2; the separation effect is shown in Table 3.

Embodiment 3

[0041] Process description is the same as embodiment 1, and the process conditions when the recycle ratio is 0.379 are shown in Table 2; Separation

[0042] The effect is shown in Table 3.

[0043] It can be seen from Table 3 that when the other conditions are basically the same, the properties of coker gas oil and cycle oil change greatly after changing the cycle ratio operation. That is, as the circulation ratio decreases, the cut point increases, the density of coker wax oil and cycle oil increases, the carbon residue and asphaltenes increase, and the distillation range becomes heavier.

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Abstract

The invention provides a test method for on-line circulation of delayed coking cycle oil, which belongs to the technical field of petroleum refining. According to the method, a fresh feed, cycle oil from the bottom of a fractionating tower and high-temperature inert gas are mixed, then the obtained mixture enters a heating furnace for heating, and the heated high temperature material enters a coke chamber for a pyrogenic reaction; high temperature oil gas produced after the reaction enters the fractionating tower for fractionation, and a gas-liquid mixture from the top of the fractionation tower is cooled and then recovered; and cycle oil from the bottom of the fractionating tower is extracted by a circulating oil pump and then conveyed to the inlet of the heating furnace for mixing with a fresh raw material, thereby realizing on-line circulation of the cycle oil. The test method for on-line circulation of the delayed coking cycle oil provided by the invention can overcome the disadvantages of low testing efficiency, great labor intensity and the like of conventional delayed coking test apparatuses, completes one operation condition test in 3 to 5 d and enables efficiency to be improved by more than 10 times.

Description

technical field [0001] The invention belongs to the technical field of petroleum refining, and in particular relates to a process method for a delayed coking test device. Background technique [0002] The delayed coking process has become one of the important processes for heavy oil processing due to thorough decarbonization, simple process, mature technology, and low equipment investment. The processing of low-quality heavy oil by the coking process brings challenges, which are mainly manifested in: ① the coking of heating furnace tubes is intensified, and the operation cycle is shortened; ② the yield of low value-added gas and coke is high, but the liquid yield is low; Thereby causing the vibration of the coke tower, bringing hidden dangers to safe production. Therefore, improving the existing delayed coking process or developing new low-quality heavy oil processing technology is an urgent task for refiners. [0003] In order to develop new delayed coking processes and n...

Claims

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Application Information

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IPC IPC(8): C10G55/04
Inventor 黄新龙亚飞张瑞风王洪斌江莉李节王少锋
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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