A kind of process method and device of delayed coking

A process method and delayed coking technology, which is applied in the field of delayed coking process and equipment, can solve the problems that the liquid fraction is easy to contain coke powder, affect the separation effect of the vacuum fractionation tower, etc., and achieve the effect of prolonging the operation period and improving the liquid collection

Active Publication Date: 2016-01-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In CN200810012208.X, the decoking powder tank uses an inert solid filler to remove coke powder. When the content of coke powder is slightly larger, on the one hand, the coke powder and viscous oil on the surface of the filler will greatly reduce the efficiency of the filler, and on the other hand, the decoking powder The heavy component at the bottom of the tank still contains a certain amount of coke powder, and this part of the heavy component is sent to the vacuum fractionation tower for further fractionation, which affects the separation effect of the vacuum fractionation tower, and the separated liquid fraction also easily contains coke powder

Method used

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  • A kind of process method and device of delayed coking
  • A kind of process method and device of delayed coking
  • A kind of process method and device of delayed coking

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Embodiment 1

[0028] In this embodiment, the attached figure 1 The process flow, this embodiment illustrates the situation of using a higher circulation ratio of 0.4 and a higher furnace outlet temperature of 503°C. In actual working conditions, when the circulation ratio is 0.4, the outlet temperature of the heating furnace of the conventional device generally does not exceed 500°C.

[0029] The vacuum residue raw material is first heated to 360°C by the convection section of the heating furnace, and then divided into upper and lower feeds into the fractionation tower. In the lower part of the fractionation tower, high-temperature oil and gas from the top of the cyclone separator and feedstock oil are fed, coking heavy wax oil The liquid stream formed after heat exchange is mixed with the raw material oil at the bottom of the fractionating tower. The bottom oil of the fractionating tower is pumped out and sent to the radiation section of the heating furnace. After being heated to 503°C in ...

Embodiment 2

[0031] In this embodiment, the attached figure 1 The process flow, this embodiment illustrates the process when the low circulation ratio and low heating furnace outlet temperature often adopted in current actual production are adopted.

[0032] Using the same vacuum residue raw material as in Example 1. The vacuum residue raw material is first heated to 360°C by the convection section of the heating furnace, and then divided into upper and lower feeds into the fractionation tower. In the lower part of the fractionation tower, high-temperature oil and gas from the top of the cyclone separator and feedstock oil are fed, coking heavy wax oil The liquid stream formed after heat exchange is mixed with the raw material oil at the bottom of the fractionating tower. The bottom oil of the fractionating tower is pumped out and sent to the radiation section of the heating furnace. After being heated to 496°C in the radiation section, it is mixed with the bottom oil of the settling tank,...

Embodiment 3

[0034] In this embodiment, the attached figure 1 The flow process of this embodiment illustrates the technological situation when the process method adopts a low circulation ratio and a higher heating furnace outlet temperature.

[0035] Using the same vacuum residue raw material as in Example 1. The vacuum residue raw material is first heated to 360°C by the convection section of the heating furnace, and then divided into upper and lower feeds into the fractionation tower. In the lower part of the fractionation tower, high-temperature oil and gas from the top of the cyclone separator and feedstock oil are fed, coking heavy wax oil The liquid stream formed after heat exchange is mixed with the raw material oil at the bottom of the fractionating tower. The bottom oil of the fractionating tower is pumped out and sent to the radiation section of the heating furnace. After being heated to 503°C in the radiation section, it is mixed with the bottom oil of the settling tank, and the...

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Abstract

The invention relates to a delayed coking process which comprises the following steps: high-temperature oil gas coming from a coke tower top enters a cyclone separator in a tangent manner; flushing oil is injected into the top of the cyclone separator; oil gas on the top of the cyclone separator enters a fractionating tower to separate coke products; oil at the bottom of the cyclone separator is divided through gravity or rotational flow sedimentation into a flow containing much coke powder and a flow containing less coke powder; the flow containing much coke powder and a flow at an exit of a heating furnace are mixed and then the mixture enters a coke tower to react; and the flow containing less coke powder or an oil mixture composed of the flow containing less coke powder and coking distillate oil is used as flushing oil of the cyclone separator. By the method and the device provided by the invention, quality of a coking product can be raised; influence of coke powder on downstream processes is reduced; yield of a liquid product can be raised; and operational cycle of the device can be prolonged.

Description

technical field [0001] The invention relates to a delayed coking process method and device for improving the yield of liquid products. Background technique [0002] As the world's crude oil resources become heavier and worse, the consumption of heavy fuel oil decreases and the demand for light oil products increases, heavy oil deep processing technology has become the focus of the development of the world's oil refining industry. At present, the main technologies to increase the conversion depth of heavy oil and increase the output of light oil products are still coking, catalytic cracking of residual oil and hydrotreating of residual oil. As a thermal processing process of deep thermal cracking, delayed coking can convert heavy oil into dry gas, liquefied gas, coker gasoline, coker diesel, coker wax oil and coke. It has the advantages of strong raw material adaptability and obvious economic benefits. One of the most important heavy oil conversion technologies. Usually, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/04C10G7/00
Inventor 阎龙申海平王子军范启明刘自宾
Owner CHINA PETROLEUM & CHEM CORP
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