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Method of raising liquid yield during delayed coking

A delayed coking and liquid technology, applied in the field of delayed coking, can solve problems such as poor sales, low yield of liquid products, and low coke value, and achieve the effect of reducing coke yield and increasing yield

Inactive Publication Date: 2004-04-07
曹炳铖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of delayed coking is that the yield of liquid products is low and the value of coke is not high, and sometimes the sales are not smooth. The yield of liquid products can generally reach about 70%, especially when dealing with inferior residues, the mass fraction of the liquid is only 50% %~60%, and the coke yield may exceed 30%

Method used

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  • Method of raising liquid yield during delayed coking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the vacuum residual oil is transported by pipeline, and the coking raw material 1 enters the buffer tank 2 after being preheated in the convection section of the heating furnace 1, and then enters the radiant section of the heating furnace 1 by the pump 3 to be heated to the coking temperature, and then enters the coke tower 4 / 5 coking. The coked gasoline obtained by the fractionation of the fractionation tower 6 is used as the evaporator II and injected before the distillate of the heating furnace 1 enters the coking tower, and the coked oil gas enters the fractionation tower 6 through the coke tower 4 / 5 overhead pipeline, and fractionation obtains gas III and distillate oil ( Gasoline IV, diesel oil V, light wax oil VI and heavy wax oil VII), the fractionation column 6 wax oil can enter the buffer tank 2 through the pump 7 for circulation, and the circulation ratio can be adjusted arbitrarily within the range of 0-0.65. Coke coalesces in t...

Embodiment 2

[0021] Compared with Example 1, the difference is that in this example, hydrocoking gasoline is injected as the evaporating agent during the coking process. The test results are shown in Table 1.

Embodiment 3

[0023] Compared with Example 1, the difference is that in this example, ethanol is injected as an evaporating agent during the coking process. The test results are shown in Table 1.

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Abstract

The method of raising liquid yield during delayed coking is to add one kind of low-boiling point evaporant capable of shortening the setting period of distillate oil in coking tower, and reducing the possibility of secondary cracking and re-condensation of hydrocarbon to form coke. The evaporatn may be gasoline, hydrogenated coked gasoline, organic alcohol, gaseous hydrocatbon or their mixture; and may be added into the fed material before coking tower, into the distillate oil in the back of coking tower and / or into the coking tower. The present invention can raise liquid yield by 2-8% and lower coke yield by over 2%.

Description

1. Technical field: [0001] This invention relates to delayed coking and, more particularly, to a method for increasing the liquid yield and reducing the coke yield during delayed coking, said yield being based on the coker feed. 2. Background technology: [0002] Delayed coking is a thermal processing process that converts residual oil into gas, light and middle distillates and coke through deep cracking. The conventional delayed coking process is: the raw material oil is preheated by the heating furnace and enters the fractionation tower to exchange heat with the coking oil and gas from the coke tower, and then enters the radiant section of the heating furnace to be heated to the coking temperature and enters the coke tower for coking, and the coke oil and gas are distilled from the top of the coke tower The gas, gasoline, diesel oil and coker wax oil are fractionated out. The wax oil at the bottom of the fractionating tower can be circulated to the buffer tank through the ...

Claims

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Application Information

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IPC IPC(8): C10G9/16
Inventor 曹炳铖
Owner 曹炳铖
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